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  Subjects -> ELECTRONICS (Total: 193 journals)
Showing 1 - 200 of 277 Journals sorted alphabetically
Acta Electronica Malaysia     Open Access  
Advanced Materials Technologies     Hybrid Journal  
Advances in Electrical and Electronic Engineering     Open Access   (Followers: 7)
Advances in Electronics     Open Access   (Followers: 94)
Advances in Magnetic and Optical Resonance     Full-text available via subscription   (Followers: 8)
Advances in Power Electronics     Open Access   (Followers: 39)
Advancing Microelectronics     Hybrid Journal  
Aerospace and Electronic Systems, IEEE Transactions on     Hybrid Journal   (Followers: 349)
American Journal of Electrical and Electronic Engineering     Open Access   (Followers: 26)
Annals of Telecommunications     Hybrid Journal   (Followers: 9)
APSIPA Transactions on Signal and Information Processing     Open Access   (Followers: 9)
Archives of Electrical Engineering     Open Access   (Followers: 14)
Australian Journal of Electrical and Electronics Engineering     Hybrid Journal  
Autonomous Mental Development, IEEE Transactions on     Hybrid Journal   (Followers: 8)
Batteries     Open Access   (Followers: 7)
Batteries & Supercaps     Hybrid Journal  
Bell Labs Technical Journal     Hybrid Journal   (Followers: 30)
Bioelectronics in Medicine     Hybrid Journal  
Biomedical Engineering, IEEE Reviews in     Full-text available via subscription   (Followers: 22)
Biomedical Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 38)
Biomedical Instrumentation & Technology     Hybrid Journal   (Followers: 6)
Broadcasting, IEEE Transactions on     Hybrid Journal   (Followers: 13)
BULLETIN of National Technical University of Ukraine. Series RADIOTECHNIQUE. RADIOAPPARATUS BUILDING     Open Access   (Followers: 1)
Bulletin of the Polish Academy of Sciences : Technical Sciences     Open Access   (Followers: 1)
Canadian Journal of Remote Sensing     Full-text available via subscription   (Followers: 47)
China Communications     Full-text available via subscription   (Followers: 9)
Chinese Journal of Electronics     Hybrid Journal  
Circuits and Systems     Open Access   (Followers: 15)
Consumer Electronics Times     Open Access   (Followers: 5)
Control Systems     Hybrid Journal   (Followers: 306)
ECTI Transactions on Computer and Information Technology (ECTI-CIT)     Open Access  
ECTI Transactions on Electrical Engineering, Electronics, and Communications     Open Access   (Followers: 1)
Edu Elektrika Journal     Open Access   (Followers: 1)
Electrica     Open Access  
Electronic Design     Partially Free   (Followers: 123)
Electronic Markets     Hybrid Journal   (Followers: 7)
Electronic Materials Letters     Hybrid Journal   (Followers: 4)
Electronics     Open Access   (Followers: 104)
Electronics and Communications in Japan     Hybrid Journal   (Followers: 10)
Electronics For You     Partially Free   (Followers: 103)
Electronics Letters     Hybrid Journal   (Followers: 26)
Elkha : Jurnal Teknik Elektro     Open Access  
Embedded Systems Letters, IEEE     Hybrid Journal   (Followers: 55)
Energy Harvesting and Systems     Hybrid Journal   (Followers: 4)
Energy Storage     Hybrid Journal  
Energy Storage Materials     Full-text available via subscription   (Followers: 3)
EPE Journal : European Power Electronics and Drives     Hybrid Journal  
EPJ Quantum Technology     Open Access   (Followers: 1)
EURASIP Journal on Embedded Systems     Open Access   (Followers: 11)
Facta Universitatis, Series : Electronics and Energetics     Open Access  
Foundations and Trends® in Communications and Information Theory     Full-text available via subscription   (Followers: 6)
Foundations and Trends® in Signal Processing     Full-text available via subscription   (Followers: 10)
Frequenz     Hybrid Journal   (Followers: 1)
Frontiers of Optoelectronics     Hybrid Journal   (Followers: 1)
Geoscience and Remote Sensing, IEEE Transactions on     Hybrid Journal   (Followers: 209)
Haptics, IEEE Transactions on     Hybrid Journal   (Followers: 4)
IACR Transactions on Symmetric Cryptology     Open Access  
IEEE Antennas and Propagation Magazine     Hybrid Journal   (Followers: 100)
IEEE Antennas and Wireless Propagation Letters     Hybrid Journal   (Followers: 81)
IEEE Journal of Emerging and Selected Topics in Power Electronics     Hybrid Journal   (Followers: 51)
IEEE Journal of the Electron Devices Society     Open Access   (Followers: 9)
IEEE Journal on Exploratory Solid-State Computational Devices and Circuits     Hybrid Journal   (Followers: 1)
IEEE Power Electronics Magazine     Full-text available via subscription   (Followers: 75)
IEEE Transactions on Antennas and Propagation     Full-text available via subscription   (Followers: 73)
IEEE Transactions on Automatic Control     Hybrid Journal   (Followers: 58)
IEEE Transactions on Circuits and Systems for Video Technology     Hybrid Journal   (Followers: 26)
IEEE Transactions on Consumer Electronics     Hybrid Journal   (Followers: 44)
IEEE Transactions on Electron Devices     Hybrid Journal   (Followers: 19)
IEEE Transactions on Information Theory     Hybrid Journal   (Followers: 26)
IEEE Transactions on Power Electronics     Hybrid Journal   (Followers: 78)
IEEE Transactions on Signal and Information Processing over Networks     Full-text available via subscription   (Followers: 12)
IEICE - Transactions on Electronics     Full-text available via subscription   (Followers: 12)
IEICE - Transactions on Information and Systems     Full-text available via subscription   (Followers: 5)
IET Cyber-Physical Systems : Theory & Applications     Open Access   (Followers: 1)
IET Energy Systems Integration     Open Access  
IET Microwaves, Antennas & Propagation     Hybrid Journal   (Followers: 35)
IET Nanodielectrics     Open Access  
IET Power Electronics     Hybrid Journal   (Followers: 57)
IET Smart Grid     Open Access  
IET Wireless Sensor Systems     Hybrid Journal   (Followers: 18)
IETE Journal of Education     Open Access   (Followers: 4)
IETE Journal of Research     Open Access   (Followers: 11)
IETE Technical Review     Open Access   (Followers: 13)
IJEIS (Indonesian Journal of Electronics and Instrumentation Systems)     Open Access   (Followers: 3)
Industrial Electronics, IEEE Transactions on     Hybrid Journal   (Followers: 74)
Industrial Technology Research Journal Phranakhon Rajabhat University     Open Access  
Industry Applications, IEEE Transactions on     Hybrid Journal   (Followers: 38)
Informatik-Spektrum     Hybrid Journal   (Followers: 2)
Instabilities in Silicon Devices     Full-text available via subscription   (Followers: 1)
Intelligent Transportation Systems Magazine, IEEE     Full-text available via subscription   (Followers: 13)
International Journal of Advanced Research in Computer Science and Electronics Engineering     Open Access   (Followers: 18)
International Journal of Advances in Telecommunications, Electrotechnics, Signals and Systems     Open Access   (Followers: 11)
International Journal of Antennas and Propagation     Open Access   (Followers: 11)
International Journal of Applied Electronics in Physics & Robotics     Open Access   (Followers: 4)
International Journal of Computational Vision and Robotics     Hybrid Journal   (Followers: 5)
International Journal of Control     Hybrid Journal   (Followers: 11)
International Journal of Electronics     Hybrid Journal   (Followers: 7)
International Journal of Electronics and Telecommunications     Open Access   (Followers: 13)
International Journal of Granular Computing, Rough Sets and Intelligent Systems     Hybrid Journal   (Followers: 3)
International Journal of High Speed Electronics and Systems     Hybrid Journal  
International Journal of Hybrid Intelligence     Hybrid Journal  
International Journal of Image, Graphics and Signal Processing     Open Access   (Followers: 16)
International Journal of Microwave and Wireless Technologies     Hybrid Journal   (Followers: 10)
International Journal of Nanoscience     Hybrid Journal   (Followers: 1)
International Journal of Numerical Modelling: Electronic Networks, Devices and Fields     Hybrid Journal   (Followers: 4)
International Journal of Power Electronics     Hybrid Journal   (Followers: 25)
International Journal of Review in Electronics & Communication Engineering     Open Access   (Followers: 4)
International Journal of Sensors, Wireless Communications and Control     Hybrid Journal   (Followers: 10)
International Journal of Systems, Control and Communications     Hybrid Journal   (Followers: 4)
International Journal of Wireless and Microwave Technologies     Open Access   (Followers: 6)
International Transaction of Electrical and Computer Engineers System     Open Access   (Followers: 2)
JAREE (Journal on Advanced Research in Electrical Engineering)     Open Access  
Journal of Biosensors & Bioelectronics     Open Access   (Followers: 4)
Journal of Advanced Dielectrics     Open Access   (Followers: 1)
Journal of Artificial Intelligence     Open Access   (Followers: 11)
Journal of Circuits, Systems, and Computers     Hybrid Journal   (Followers: 4)
Journal of Computational Intelligence and Electronic Systems     Full-text available via subscription   (Followers: 1)
Journal of Electrical and Electronics Engineering Research     Open Access   (Followers: 35)
Journal of Electrical Bioimpedance     Open Access  
Journal of Electrical Bioimpedance     Open Access   (Followers: 2)
Journal of Electrical Engineering & Electronic Technology     Hybrid Journal   (Followers: 7)
Journal of Electrical, Electronics and Informatics     Open Access  
Journal of Electromagnetic Analysis and Applications     Open Access   (Followers: 8)
Journal of Electromagnetic Waves and Applications     Hybrid Journal   (Followers: 9)
Journal of Electronic Design Technology     Full-text available via subscription   (Followers: 6)
Journal of Electronics (China)     Hybrid Journal   (Followers: 5)
Journal of Energy Storage     Full-text available via subscription   (Followers: 4)
Journal of Engineered Fibers and Fabrics     Open Access   (Followers: 2)
Journal of Field Robotics     Hybrid Journal   (Followers: 3)
Journal of Guidance, Control, and Dynamics     Hybrid Journal   (Followers: 182)
Journal of Information and Telecommunication     Open Access   (Followers: 1)
Journal of Intelligent Procedures in Electrical Technology     Open Access   (Followers: 3)
Journal of Low Power Electronics     Full-text available via subscription   (Followers: 10)
Journal of Low Power Electronics and Applications     Open Access   (Followers: 10)
Journal of Microelectronics and Electronic Packaging     Hybrid Journal  
Journal of Microwave Power and Electromagnetic Energy     Hybrid Journal   (Followers: 3)
Journal of Microwaves, Optoelectronics and Electromagnetic Applications     Open Access   (Followers: 11)
Journal of Nuclear Cardiology     Hybrid Journal  
Journal of Optoelectronics Engineering     Open Access   (Followers: 4)
Journal of Physics B: Atomic, Molecular and Optical Physics     Hybrid Journal   (Followers: 30)
Journal of Power Electronics & Power Systems     Full-text available via subscription   (Followers: 11)
Journal of Semiconductors     Full-text available via subscription   (Followers: 5)
Journal of Sensors     Open Access   (Followers: 26)
Journal of Signal and Information Processing     Open Access   (Followers: 9)
Jurnal ELTIKOM : Jurnal Teknik Elektro, Teknologi Informasi dan Komputer     Open Access  
Jurnal Rekayasa Elektrika     Open Access  
Jurnal Teknik Elektro     Open Access  
Jurnal Teknologi Elektro     Open Access  
Kinetik : Game Technology, Information System, Computer Network, Computing, Electronics, and Control     Open Access  
Learning Technologies, IEEE Transactions on     Hybrid Journal   (Followers: 12)
Magnetics Letters, IEEE     Hybrid Journal   (Followers: 7)
Majalah Ilmiah Teknologi Elektro : Journal of Electrical Technology     Open Access   (Followers: 2)
Metrology and Measurement Systems     Open Access   (Followers: 6)
Microelectronics and Solid State Electronics     Open Access   (Followers: 28)
Nanotechnology Magazine, IEEE     Full-text available via subscription   (Followers: 42)
Nanotechnology, Science and Applications     Open Access   (Followers: 6)
Nature Electronics     Hybrid Journal   (Followers: 1)
Networks: an International Journal     Hybrid Journal   (Followers: 5)
Open Electrical & Electronic Engineering Journal     Open Access  
Open Journal of Antennas and Propagation     Open Access   (Followers: 9)
Optical Communications and Networking, IEEE/OSA Journal of     Full-text available via subscription   (Followers: 15)
Paladyn. Journal of Behavioral Robotics     Open Access   (Followers: 1)
Power Electronics and Drives     Open Access   (Followers: 2)
Problemy Peredachi Informatsii     Full-text available via subscription  
Progress in Quantum Electronics     Full-text available via subscription   (Followers: 7)
Pulse     Full-text available via subscription   (Followers: 5)
Radiophysics and Quantum Electronics     Hybrid Journal   (Followers: 2)
Recent Advances in Communications and Networking Technology     Hybrid Journal   (Followers: 3)
Recent Advances in Electrical & Electronic Engineering     Hybrid Journal   (Followers: 9)
Research & Reviews : Journal of Embedded System & Applications     Full-text available via subscription   (Followers: 5)
Revue Méditerranéenne des Télécommunications     Open Access  
Security and Communication Networks     Hybrid Journal   (Followers: 2)
Selected Topics in Applied Earth Observations and Remote Sensing, IEEE Journal of     Hybrid Journal   (Followers: 56)
Semiconductors and Semimetals     Full-text available via subscription   (Followers: 1)
Sensing and Imaging : An International Journal     Hybrid Journal   (Followers: 2)
Services Computing, IEEE Transactions on     Hybrid Journal   (Followers: 4)
Software Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 78)
Solid State Electronics Letters     Open Access  
Solid-State Circuits Magazine, IEEE     Hybrid Journal   (Followers: 13)
Solid-State Electronics     Hybrid Journal   (Followers: 9)
Superconductor Science and Technology     Hybrid Journal   (Followers: 3)
Synthesis Lectures on Power Electronics     Full-text available via subscription   (Followers: 3)
Technical Report Electronics and Computer Engineering     Open Access  
TELE     Open Access  
Telematique     Open Access  
TELKOMNIKA (Telecommunication, Computing, Electronics and Control)     Open Access   (Followers: 9)
Transactions on Electrical and Electronic Materials     Hybrid Journal  
Universal Journal of Electrical and Electronic Engineering     Open Access   (Followers: 6)
Ural Radio Engineering Journal     Open Access  
Visión Electrónica : algo más que un estado sólido     Open Access   (Followers: 1)
Wireless and Mobile Technologies     Open Access   (Followers: 6)
Wireless Power Transfer     Full-text available via subscription   (Followers: 4)
Women in Engineering Magazine, IEEE     Full-text available via subscription   (Followers: 11)
Електротехніка і Електромеханіка     Open Access  

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Similar Journals
Journal Cover
IEEE Journal of Emerging and Selected Topics in Power Electronics
Journal Prestige (SJR): 1.657
Citation Impact (citeScore): 7
Number of Followers: 51  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 2168-6777 - ISSN (Online) 2168-6785
Published by IEEE Homepage  [191 journals]
  • IEEE Journal of Emerging and Selected Topics in Power Electronics
    • Abstract: Provides a listing of current staff, committee members and society officers.
      PubDate: Dec. 2019
      Issue No: Vol. 7, No. 4 (2019)
       
  • IEEE Power Electronics Society Information
    • Abstract: Provides a listing of current committee members and society officers.
      PubDate: Dec. 2019
      Issue No: Vol. 7, No. 4 (2019)
       
  • Best Papers and Star Associate Editors (2018)
    • Authors: Joseph Olorunfemi Ojo;
      Pages: 2129 - 2129
      Abstract: The Editorial Board of the IEEE Journal of Emerging and Selected Topics in Power Electronics (JESTPE) appreciates the authors for the very high-quality papers published in the Journal during the year 2018. After a rigorous process involving the Editorial Board and some Associate Editors, the following were selected as best papers among the papers published in the four issues of JESTPE produced in 2018.
      PubDate: Dec. 2019
      Issue No: Vol. 7, No. 4 (2019)
       
  • On the Inertia of Future More-Electronics Power Systems
    • Authors: Jingyang Fang;Hongchang Li;Yi Tang;Frede Blaabjerg;
      Pages: 2130 - 2146
      Abstract: Inertia plays a vital role in maintaining the frequency stability of power systems. However, the increase of power electronics-based renewable generation can dramatically reduce the inertia levels of modern power systems. This issue has already challenged the control and stability of small-scale power systems. It will soon be faced by larger power systems as the trend of large-scale renewable integration continues. In view of the urgent demand for addressing the inertia concern, this paper presents a comprehensive review of inertia enhancement methods covering both proven techniques and emerging ones and also studies the effect of inertia on frequency control. Among those proven techniques, the inertia emulation by wind turbines has successfully demonstrated its effectiveness and will receive widespread adoptions. For the emerging techniques, the virtual inertia generated by the dc-link capacitors of power converters has a great potential due to its low cost. The same concept of inertia emulation can also be applied to ultracapacitors. In addition, batteries will serve as an alternative inertia supplier, and the relevant technical challenges as well as the solutions are discussed in this paper. In future power systems where most of the generators and loads are connected via power electronics, virtual synchronous machines will gradually take over the responsibility of inertia support. In general, it is concluded that advances in semiconductors and control promise to make power electronics an enabling technology for inertia control in future power systems.
      PubDate: Dec. 2019
      Issue No: Vol. 7, No. 4 (2019)
       
  • An Input-Parallel–Output-Series Multilevel Boost Converter With a
           Uniform Voltage- Balance Control Strategy
    • Authors: Jianfei Chen;Caisheng Wang;Jian Li;Chenguang Jiang;Chen Duan;
      Pages: 2147 - 2157
      Abstract: An input-parallel-output-series multilevel boost converter is proposed in this paper. The theoretical analysis of this topology indicates that it has a high voltage gain, low component stress, small input current ripple, and automatic current balancing function for all input inductor currents. A uniform voltage balance control strategy is subsequently proposed to address the capacitor voltage imbalance issue. The experimental study has been done to verify the correctness and feasibility of the proposed topology and the voltage-balance control strategy.
      PubDate: Dec. 2019
      Issue No: Vol. 7, No. 4 (2019)
       
  • A Model Predictive Control-Based Open-Circuit Fault Diagnosis and Tolerant
           Scheme of Three-Phase AC–DC Rectifiers
    • Authors: Dehong Zhou;Yi Tang;
      Pages: 2158 - 2169
      Abstract: Three-phase ac-dc rectifiers are extensively employed in critical power conversion applications. This paper proposes an open-circuit fault diagnosis and tolerant scheme based on model predictive control (MPC) to enhance their reliability. The proposed fault diagnosis method is directly implemented by checking the mismatch signal between the applied switching state and the estimated one. The switching state error is independent of the voltage or current signals. Therefore, it is applicable to different voltage rating and loading scenarios. As long as the faulty switch conducts current, the open-circuit fault can be isolated very fast within several sampling periods. By introducing the healthy leg variables, a generalized model including both normal and faulty operations is proposed and the fault-tolerant scheme can be integrated into the MPC scheme for normal operations. With the proposed generalized model and fault-tolerant scheme, the rectifier can autonomously recover from open-circuit faults and the continuous operation of three-phase ac-dc rectifiers is maintained. The proposed fault diagnosis and tolerant scheme are applicable under balanced and unbalanced grid conditions. Experimental results demonstrate the effectiveness of the proposed integrated fault diagnosis and fault-tolerant scheme.
      PubDate: Dec. 2019
      Issue No: Vol. 7, No. 4 (2019)
       
  • Analysis of the DC-Link Current for the Single-Phase H-Bridge Inverter
           Under Harmonic Output Currents
    • Authors: Tao Wang;Shuai Lu;
      Pages: 2170 - 2183
      Abstract: This paper investigates the dc-link current to facilitate the dc-link capacitor sizing for the single-phase H-bridge inverter under harmonic ac currents. As the capacitor equivalent series resistance varies significantly until the frequency is higher than 1 kHz, the expressions of the dc-link current individual low-order harmonics (LOHs) and the switching harmonic currents (SHCs) root-mean-square (rms) value are derived, respectively, to accurately evaluate the dc capacitor losses. The dc-link LOH expressions reveal that each harmonic ac current induces two harmonic currents in the dc-link. When the ac current has multiple combinations of LOHs, the dc-link current envelopes take infinite possible unusual forms, so after somewhat complicated derivation, the SHCs rms equations are successfully derived and further simplified into one equation for easy worst case design as demonstrated by the actual case study. A single-phase H-bridge inverter lab prototype is developed to inject arbitrary combinations of harmonic currents of different orders, amplitudes, and angles into the grid. The good match between the computational, simulation, and experimental results validate the effectiveness of the proposed method. In particular, the worst case analysis is verified by the experiment and the differences between the experimental and computational results are formulated and explained definitely.
      PubDate: Dec. 2019
      Issue No: Vol. 7, No. 4 (2019)
       
  • A Flexible Power Control for PV-Battery Hybrid System Using Cascaded
           H-Bridge Converters
    • Authors: Qinghao Zhang;Kai Sun;
      Pages: 2184 - 2195
      Abstract: The cascaded H-bridge (CHB) is a good candidate to integrate multiple photovoltaic (PV) arrays into the power grid. However, due to the internal uncertain power supply of renewable sources, it is difficult to meet the power grid power command with only PV arrays. To overcome this limitation, a CHB converter with both PV arrays and energy storage units in the dc rails is proposed in this paper. First, a two-layer hierarchical control is developed for independent PQ control and power distribution among each CHB cell, while meeting with the grid PQ reference command at the same time (P represents “active power” and Q represents “reactive power”). Then, a modified power management method is developed to adaptively modify the current power points for PV panels from their maximum power points to solve the potential overmodulation problem caused by frequent battery charging and discharging. With the proposed approach, a good harvesting of PV power can be ensured in various situations. Verification results are provided to validate the performance of the proposed system.
      PubDate: Dec. 2019
      Issue No: Vol. 7, No. 4 (2019)
       
  • Switched Linear Control of Quadratic-Boost Converters
    • Authors: Mohammad Rasool Mojallizadeh;Mohammad Ali Badamchizadeh;
      Pages: 2196 - 2203
      Abstract: In this paper, a new observer-based switched linear control law is designed for output voltage regulation of quadratic-boost converters. The proposed controller is based on the min-type switching strategy. Switching behavior of the converter is considered in the design procedure. The system is based on the direct one-loop control scheme. A robust switched observer is used to decrease the number of required sensors and increase the robustness of the system. Electromagnetic compatibility of the system is investigated. Global stability of the observer-based control system is ensured. A recent sliding mode controller is considered to compare the results with those of the proposed controller. Performance of the proposed controller is investigated through a number of simulations and experiments.
      PubDate: Dec. 2019
      Issue No: Vol. 7, No. 4 (2019)
       
  • Model Predictive Power Control With Dual Vectors for Three-Level Inverter
    • Authors: Bihua Hu;Longyun Kang;Jiancai Cheng;Xuan Luo;Zhi Zhang;
      Pages: 2204 - 2212
      Abstract: Model predictive power control (MPPC) has been receiving plenty of concern due to its fast dynamic response. However, the varying switching frequency makes the harmonics of output voltage vary over a wide scope, which adds difficulty in designing alternating current (ac) filter. Here, on the basis of the active and reactive power derivatives of each vector and the effect of switching states on neutral point (NP) voltage, we present an MPPC with dual vectors (MPPCDV) to control the three-level (3L) inverter. In this algorithm, a new switching sequence is provided to balance the NP voltage of 3L inverter, and two cost functions are derived to reduce the number of cycle computation. According to the first cost functions, the sector containing optimal switching sequence (OSS) is obtained. The second cost function is assigned to achieve the multiobjective optimization. Simulations and experiments are built to test the effectiveness of MPPCDV. When the 3L inverter adopts the MPPCDV, the majority of the harmonic frequencies in the output voltage is concentrated near the sample frequency, the steady-state performances are improved remarkably, and the dynamic performance is as fast as the conventional MPPC.
      PubDate: Dec. 2019
      Issue No: Vol. 7, No. 4 (2019)
       
  • Robust Predictive Control of High-Density Cascaded DC Voltage Link Power
           Converters
    • Authors: Mahima Gupta;Giri Venkataramanan;
      Pages: 2213 - 2224
      Abstract: Cascaded dc voltage link power converters typically employ a significant amount of energy storage at the intermediate link. The dc bus voltage is assumed to be stiff enough to provide decoupling between the source and load, allowing dynamic regulation functions to be implemented at the load and source terminals independently. In these cases, the size of the dc bus capacitance is dictated by requirements of steady-state ripple voltage, ripple current rating, ride-through considerations, and, more importantly, voltage overshoot during source and load transients. Design tradeoffs in realizing a stable system with acceptable transient performance often place a lower bound in the value of dc bus capacitance. In this paper, a robust predictive controller based on integrated and coupled control at the intermediate dc link, source, and load terminals is presented. The approach permits the use of a small amount of intermediate energy storage compared to conventional decoupled designs. The predictive control aspect of the proposed approach features cost function minimization and accurate duty ratio calculations based on converter model that accounts for small values of dc link capacitance. Although this allows stable operation of the system, it leads to persistent steady state error and transient overshoot voltages. The robust aspect of the proposed approach is based on the theory of variable structure systems. It introduces a capacitor charge restoration function that overcomes the drawbacks of the predictive control by squarely addressing uncertainty of model parameters and operating conditions. The resulting significant reduction in size of the capacitive reactive components opens the prospect of replacing electrolytic capacitors that have a limited life span with film capacitors with much longer life in emerging applications. The proposed approach is presented in a step-by-step manner using a dc-to-dc converter example and further extended to a dc-to-ac inverter case. Ex-ensive computer simulations and experimental results from a laboratory-scale prototype of an example system are used to demonstrate the viability of the proposed controller.
      PubDate: Dec. 2019
      Issue No: Vol. 7, No. 4 (2019)
       
  • Improved Analysis and Modeling of Leakage Inductance for Planar
           Transformers
    • Authors: Ziwei Ouyang;William Gerard Hurley;Michael A.E. Andersen;
      Pages: 2225 - 2231
      Abstract: Planar transformers have often been mistaken to essentially have lower leakage inductances. The “radial effect” is a natural characteristic for planar windings due to a higher aspect ratio of conductor width to conductor thickness, which gives a reduction in leakage inductance. Traditional formulas for leakage inductance in traditional transformers, where the winding width is much smaller than the winding height, are not suitable for planar transformers. This paper specifically tailors the traditional 1-D solution of leakage inductance by decomposing the leakage flux into longitudinal and transversal fluxes. In this manner, the “eddy current effect” and the “radial effect” in leakage inductance can be analyzed individually. The proposed new formula including both ac (high-frequency eddy current effect) and dc effects (radial effect) offers an accurate prediction of leakage inductance in planar transformers. Finite element analysis and measurements are carried out to validate the proposed formula.
      PubDate: Dec. 2019
      Issue No: Vol. 7, No. 4 (2019)
       
  • Low-Cost Drive for Switched Reluctance Machine Using Piezoelectric
           Actuators
    • Authors: Lizon Maharjan;Dingy He;Nasim Arbab;Babak Fahimi;
      Pages: 2232 - 2242
      Abstract: Contemporary power electronics designs are based on stationary placement of power switches. Inability to change the terminal connections causes increase in number of switches, corresponding components, and driver circuits. Moreover, most fault tolerant realizations require additional switches (redundancy approach). Hence, the motivation behind this paper is to engineer a solution which can allow for a dynamic circuit topology, thereby alleviating the size, cost, and complexity issues associated with current technology. Dynamic circuit topology refers to a technology that enables making or breaking a connection without disrupting the circuit functionality. This idea embarks a novel set of possibilities such as replacing vulnerable components for increased fault tolerance, multiplexing components to change circuit behavior, and multiplexing circuits between multiple loads. In this paper, electromechanical actuation using piezoelectric materials has been explored for dynamic relocation of one asymmetric bridge to all the phases of a switched reluctance machine, reducing the number of semiconductor switches by a factor of 4. The presented concept can generate new opportunities such as reduced part converter topologies, which can in turn introduce substantial saving in development cost and the required footprint.
      PubDate: Dec. 2019
      Issue No: Vol. 7, No. 4 (2019)
       
  • Capacitor Size Reduction of Multilevel Inverters by Utilizing Neutral
           Shifting
    • Authors: Rajesh Vasu;Sumit Kumar Chattopadhyay;Chandan Chakraborty;
      Pages: 2243 - 2254
      Abstract: Reduction of size of capacitor is an active area of research as it greatly reduces cost and footprint of the system. A level doubling network (LDN) is a half-bridge with floating capacitor in its dc bus, which doubles the number of ac output voltage levels when connected to a multilevel inverter unit. LDN automatically gets settled at a desired voltage level without closed-loop control. Capacitor of the LDN gets charged for a complete half cycle and discharges for the next half-cycle and therefore results in a higher ripple voltage demanding a higher capacitance. This paper presents a new method to reduce the size of LDN capacitor keeping the voltage ripple within limits. This is achieved by shifting the Neutral point of inverter between positive and negative dc busses of the LDN, which enables the capacitor to charge or discharge more frequently, irrespective of the modulation index and load power factor. In addition, controlling is done in such a way that uniform power distribution ratio among the cells of a single phase leg of the inverter is achieved. Working principle of the proposed method is verified through simulation in MATLAB/Simulink and experimentation on a laboratory prototype.
      PubDate: Dec. 2019
      Issue No: Vol. 7, No. 4 (2019)
       
  • An Electrolytic Capacitorless Modular Three-Phase AC–DC LED Driver Based
           on Summing the Light Output of Each Phase
    • Authors: Ignacio Castro;Aitor Vazquez;Diego G. Lamar;Manuel Arias;Marta M. Hernando;Javier Sebastian;
      Pages: 2255 - 2270
      Abstract: The proposal of this paper is a modular three-phase ac-dc light-emitting diode (LED) driver for high-power luminaires based on LEDs that uses each phase to control an independent LED load removing in the process both the electrolytic capacitor and the second stage to increase both the lifetime and the efficiency. The driving of each LED load is done by means of a dc-dc converter operating as a loss-free resistor responsible for controlling the current across it. Furthermore, each dc-dc converter needs to achieve power factor correction (PFC) to comply with the restrictive IEC 61000-3-2 class C requirements, hence, achieving unity power factor and low total harmonic distortion. Taking advantage of the light properties, the output of the LED driver will be the sum of the light of each of the phases. Therefore, a theoretical study will be carried out to observe the feasibility of removing the electrolytic capacitor while guaranteeing a flicker-free behavior of the LED luminaire, even if the current of each string is pulsating at twice the mains frequency. This particular performance under high output current and voltage ripples requires reevaluating the well-known limits between the conduction modes in PFC converters. In addition, the theoretical analysis also discusses and proposes control methods for the LED driver, which thanks to its modularity can easily scale in power to drive high-power luminaires. In order to validate the theoretical analysis, a prototype has been built comprised three PFC boost converters disposing of their electrolytic capacitors. The designed prototype operates in the full range of the European three-phase line voltage, which varies between 380 and 420 V, and supplies an output light of 42.000 lm at a maximum power of 300 W while achieving an electrical efficiency of 97.5%.
      PubDate: Dec. 2019
      Issue No: Vol. 7, No. 4 (2019)
       
  • An AC–AC Modular Multilevel Converter-Based Partially Rated
           Solid-State Transformer
    • Authors: Qichen Yang;Maryam Saeedifard;
      Pages: 2271 - 2280
      Abstract: Increasing penetration rate of the renewable energy resources in conjunction with emergence of new dynamic loads such as electric vehicles, necessitate more flexible, efficient, and economical operation of the power grid. To maximize the utilization of the power system infrastructure in an efficient and economical way, partially rated solid-state transformer (PSST) has been proposed to control the power flow and to improve the power quality. In this paper, based on a newly developed ac-ac modular multilevel converter (MMC), new PSSTs along with their supporting control strategies are proposed. The proposed PSSTs borrow the salient features of the MMC and are capable of controlling power flow, compensating voltage sag/swell, filtering the current harmonics, and removing unbalanced current components of the grid. Simulation studies in the PSCAD/EMTDC software environment are carried out to validate the performance and effectiveness of the proposed MMC-based PSSTs and the supporting control methods for different applications.
      PubDate: Dec. 2019
      Issue No: Vol. 7, No. 4 (2019)
       
  • Enhanced Active Power Balancing Capability of Grid-Connected Solar PV Fed
           Cascaded H-Bridge Converter
    • Authors: Rahul Sharma;Anandarup Das;
      Pages: 2281 - 2291
      Abstract: Cascaded H-bridge converter is a promising solution for the next generation large-scale photovoltaic (PV) system having both active and reactive power exchange capacity. However, one challenge with this converter is unbalanced power generation among the clusters or cells due to variation in radiation level, temperature, dusting on PV cells etc. In order to inject balanced power to the grid, in this paper, a controlled exchange of reactive power is proposed so that the converter can work with unbalanced power generation within the clusters. The magnitude of reactive power exchange is derived and necessary conditions to prevent overmodulation are discussed. In addition, the magnitude of zero voltage is derived taking into account both active and reactive power exchange with the grid. By exchanging reactive power, the converter can also be used during low-voltage ride-through condition. This paper introduces a novel representation of unbalanced power generation using the barycentric coordinate system which helps to identify regions in the power plane which require the exchange of reactive power. The proposed method is verified through computer simulation and in a laboratory prototype.
      PubDate: Dec. 2019
      Issue No: Vol. 7, No. 4 (2019)
       
  • A Current Reallocation Strategy to Attenuate the Peak Arm Current of the
           Modular Multilevel Matrix Converter
    • Authors: Shenquan Liu;Maryam Saeedifard;Xifan Wang;Boyang Zhao;
      Pages: 2292 - 2302
      Abstract: The modular multilevel matrix converter (M3C) is a promising candidate for direct ac-to-ac conversion systems. This paper proposes a novel arm current reallocation strategy for the M3C to attenuate the peak arm current. The principle of the proposed strategy is to dynamically adjust the distribution of the positive-sequence current components among the three star-figure subconverters according to their respective instantaneous zero-sequence current components. First, a square-value-based strategy is proposed and its performance in attenuating the peak arm current at different current conversion ratios is evaluated. Then, the impacts of the proposed strategy on the root-mean-square value of the arm current and submodule capacitor voltages ripple are analyzed. Based on the analysis, an algorithm for determination of the reallocation coefficient, and embedment of the proposed strategy in the existing control methods is developed. Based on the proposed strategy and depending on the current conversion ratio of the M3C, up to 14.6%-21.6% of the peak arm current can be attenuated. Performance and effectiveness of the proposed current reallocation strategy are verified by simulation studies conducted in the MATLAB/Simulink software environment.
      PubDate: Dec. 2019
      Issue No: Vol. 7, No. 4 (2019)
       
  • Drive System With Asymmetrical Power Electronics Devices for Novel
           Reluctance Machines With DC-Biased Sinusoidal Current
    • Authors: An Li;Zihan Gao;Dong Jiang;Wubin Kong;Ronghai Qu;
      Pages: 2303 - 2313
      Abstract: This paper proposes a drive system with asymmetrical power electronics devices for the novel reluctance machines with dc-biased sinusoidal current, which is called as dc-RMs in this paper. The three-phase sinusoidal current with same dc offset is injected into the stator winding in the dc-VMs. Therefore, the power device selection method of the conventional motor drive is no longer suitable for dc-RMs. Because of the dc-biased sinusoidal current, two-quadrant switches with asymmetrical current capacity are proposed for the dc-RMs drive. With the asymmetrical switches, the asymmetrical three-phase H-bridge inverter is further brought out. This paper, detailed, analyzes the influence of modulation strategy on current stress of each device and derive the specific current capacity of asymmetric switches. The effects of harmonic current on the current stress, caused by the harmonic back electromotive force in dc-RMs, are also analyzed. Simulation and experimental verification show that the drive with asymmetrical power electronics devices can ensure the performance of the motor while reducing the cost, increasing the power density, and balancing the temperature of the power devices. The theoretical calculation of the current stress is also proved to be precise. In addition, the two-quadrant switches with asymmetric capacity proposed in this paper can also be applied to other dc-RMs drive structure to improve performance.
      PubDate: Dec. 2019
      Issue No: Vol. 7, No. 4 (2019)
       
  • Investigation on the Effects of Unbalanced Clamping Force on Multichip
           Press Pack IGBT Modules
    • Authors: Wei Lai;Hui Li;Minyou Chen;Shengyang Kang;Hai Ren;Ran Yao;Liangming Pan;Rui Jin;
      Pages: 2314 - 2322
      Abstract: Press-pack packaging technology has been widely used in insulated-gate bipolar transistors for high-voltage and high-power density applications. The effects of unbalanced internal pressure, which occurs frequently within large-scale presspack modules, remain unclear, and thermal parameters within modules cannot be directly measured due to the pressure-type package structure. Current and temperature distribution within 3300 V/1500 A modules are investigated to determine module reliability characteristics and derive future lifetime models using multiphysics models. Unbalanced clamping force causes extremely uneven temperature stress and electrical stress in spatial distribution. It indicates that partial chips must withstand high stresses that cause the initial fatigue of large-scale press-pack modules. Junction temperature difference reaches up to 53.6 °C among chips at chip surface roughness of 1.27 μm. This condition shows that the aging of modules will accelerate at the onset of partial chips degradation. Finite-element modeling and equivalent test are utilized to verify the multiphysics model by using single-chip devices in parallel.
      PubDate: Dec. 2019
      Issue No: Vol. 7, No. 4 (2019)
       
  • Novel H-Bridge-Based Topology of Multilevel Inverter With Reduced Number
           of Devices
    • Authors: Shivam Prakash Gautam;
      Pages: 2323 - 2332
      Abstract: Multilevel inverters (MLIs) have gained significant recognition in the field of high-power conversion due to its reduced voltage stress across the power switches and low total harmonic distortion in the output voltage waveform. However, MLI incorporates a large number of semiconductor switches and isolated dc sources, which increases its cost and complexity and reduces the reliability. In this paper, a novel topology of MLI is proposed for both symmetrical and asymmetrical configurations. The proposed configuration offers a reduced number of controlled switches and dc source as compared to conventional and recently proposed topologies. Reduction in switches and dc sources reduces the cost, size, and complexity and enhances the overall performance of the proposed topology. A comparative analysis of the proposed topologies with the classical topology and recently published topologies have been made in terms of controlled switches, power diodes, driver circuit requirement, dc voltage sources, and blocking voltage. Multicarrier pulsewidth modulation strategy is adopted for generating the switching pulses. The detailed simulation study of the proposed topology has been carried out using MATLAB/SIMULINK and feasibility of topology has been validated experimentally for 5-/25-level inverter.
      PubDate: Dec. 2019
      Issue No: Vol. 7, No. 4 (2019)
       
  • Improved Full-Order Adaptive Observer for Sensorless Induction Motor
           Control in Railway Traction Systems Under Low-Switching Frequency
    • Authors: Shaobo Yin;Yingwei Huang;Yaru Xue;Dongyi Meng;Chengtao Wang;Yi Lv;Lijun Diao;Juri Jatskevich;
      Pages: 2333 - 2345
      Abstract: In the applications of medium- to high-power railway traction systems, the switching frequency and controller sampling rate are relatively low due to the requirements for low losses, high reliability, and limited processor power. These limitations greatly hinder the sensorless control of induction motors, especially in the high-speed operation range. In this paper, a full-order adaptive observer based on an improved discrete model is proposed, which significantly improves the system stability and control performance over the entire speed range. The feedback gain matrix of the presented control scheme is developed in a discrete time domain, ensuring that all the poles of the closed-loop observer are within the stable region. Moreover, a speed estimation mechanism based on Lyapunov's approach is designed in the synchronous rotating reference frame to further improve the precision of speed observation. Rigorous simulation studies and experimental tests of a benchmark induction motor in railway traction system demonstrate that the improved adaptive observer achieves superior sensorless control performance over the conventional adaptive observer.
      PubDate: Dec. 2019
      Issue No: Vol. 7, No. 4 (2019)
       
  • A Modified Flux Regulation Method to Minimize Switching Frequency and
           Improve DTC-Hysteresis-Based Induction Machines in Low-Speed Regions
    • Authors: Ibrahim Mohd Alsofyani;Keon Young Kim;Sze Sing Lee;Kyo-Beum Lee;
      Pages: 2346 - 2355
      Abstract: Direct torque control (DTC) suffers from flux droop owing to the long zero-voltage vectors at low motor speeds. Previous studies were able to attain flux regulation by imposing the continuous switching of forward and reverse active-voltage vectors by causing torque overshoots in the torque hysteresis bands (THBs). This led to an excessive increase in the switching frequency and larger torque and current ripples, thus reducing the drive efficiency. In this paper, a modified flux regulation method is proposed for the classical DTC using a single THB when flux droop occurs in a low-rotor-speed range. The proposed method can protect the DTC from flux droops at low speeds by reducing the duration of zero-voltage vectors and minimizing the number of reverse-voltage vectors. In addition, the proposed strategy is efficient in reducing torque and current ripples while operating at low motor speeds. Furthermore, a significant reduction in the switching frequency is obtained. The effectiveness of the proposed strategy is confirmed by simulation and experimental results.
      PubDate: Dec. 2019
      Issue No: Vol. 7, No. 4 (2019)
       
  • Current Control Strategies for Parallel-Form Switch-Linear Hybrid Envelope
           Tracking Power Supply With Two Switched-Mode Converters to Achieve Optimal
           Power Allocation
    • Authors: Yang Leng;Xinbo Ruan;Qian Jin;Yazhou Wang;
      Pages: 2356 - 2368
      Abstract: Switch-linear hybrid (SLH) envelope tracking (ET) power supply is one of the mainstream structures for achieving both high efficiency and high bandwidth. When tracking a high bandwidth envelope signal, the overall efficiency of SLH ET power supply with the single switched-mode converter is limited. This paper adopts two switched-mode converters with different tracking bandwidths instead of the single switched-mode converter. The switched-mode converter with low tracking bandwidth is called slow switched-mode converter (SSMC), which aims for providing the low-frequency load current components with low slew rate; while the switched-mode converter with high tracking bandwidth is called fast switched-mode converter (FSMC), which copes with the high-frequency load current components with high slew rate. The rest load current components are processed by the linear amplifier. The class-A linear amplifier is employed for reducing the complexity of the circuits, which works as a voltage regulator that does not sink the load current. The SSMC provides the majority of the load current with low switching frequency. Thus, the switching loss of the SSMC is not high. The FSMC is operated at high switching frequency but provides the minority of the load current, and thus the switching loss of the FSMC is not high. The valley-point current control and peak current control with critical continuous current mode are proposed for the SSMC and FSMC, respectively, achieving the desired power allocation among the SSMC, FSMC, and the linear amplifier. Finally, a prototype is fabricated in the lab aiming for tracking a 10-MHz envelope signal and 20-W average output power. Experimental results are provided to verify the effectiveness of the proposed configuration and its current control strategies. The efficiency of the proposed SLH power supply is 77.0%, a 4.5% efficiency improvement compared with the SLH ET power supply with the single switched-mode converter.
      PubDate: Dec. 2019
      Issue No: Vol. 7, No. 4 (2019)
       
  • Comprehensive Analysis of Capacitor Voltage Fluctuation and Capacitance
           Design for Submodules in Hybrid Modular Multilevel Converter With Boosted
           Modulation Index
    • Authors: Lei Lin;Yizhe Lin;Chen Xu;Yu Chen;
      Pages: 2369 - 2383
      Abstract: Hybrid modular multilevel converter (MMC) with half-bridge sub-modules (HBSMs) and full-bridge SMs (FBSMs) is considered as a promising topology for high-voltage direct current (HVDC) system to deal with dc fault due to its negative output from FBSMs. In addition, the negative output from FBSMs can increase modulation index at steady state. With boosted modulation index, ac voltage can be enhanced and remains unchanged under decreased dc voltage. However, the characteristics of SM capacitor voltage fluctuation for such a hybrid MMC are different from that in traditional MMC since the impacts of FBSMs and HBSMs should be compromised. Then, the SM capacitance design should adapt to the working condition. In this paper, the charging and discharging processes of capacitor in HBSMs and FBSMs are physically analyzed in detail with the piecewise analysis method. Then, the characteristics of capacitor voltage fluctuation in HBSMs and FBSMs are portrayed. Based on the characteristics, the runnable region for hybrid MMC is demonstrated, and the principles to obtain the maximum energy variation in both kinds of SMs are deduced. Furthermore, the quantitative design method of the SM capacitance is brought out. Experiments are implemented to verify the feasibility and validity of the proposed analysis and design method.
      PubDate: Dec. 2019
      Issue No: Vol. 7, No. 4 (2019)
       
  • A Reliable Three-Phase Single-Stage Multiport Inverter for Grid-Connected
           Photovoltaic Applications
    • Authors: Amir Mousa Haddadi;Shahrokh Farhangi;Frede Blaabjerg;
      Pages: 2384 - 2393
      Abstract: This paper presents a new three-phase single-stage multiport inverter (SSMPI). The proposed topology contains no electrolytic capacitors. Therefore, its reliability and lifetime are improved in comparison with the well-known two-stage multiport voltage source inverters. In addition, the SSMPI has a modular structure and the number of input ports can be easily increased. The input ports of the SSMPI can be fed by different photovoltaic (PV) strings. Therefore, the SSMPI can be used in PV power plants with multiple PV strings to enhance the reliability and the lifetime of the power plant. The SSMPI can extract the maximum power from multiple PV strings with different irradiations, orientations, and characteristics. In this paper, the SSMPI structure and its challenges in switching command generation and control are explained. Then, a new switching algorithm based on space vector modulation and a novel control strategy are developed to fulfil the requirements of the SSMPI. The simulation and experimental test results of a 2.4 kW prototype show that the proposed converter can inject three-phase currents to the grid with a unity power factor and without using any ac current sensors. Moreover, the maximum power is extracted from the input ports in different test conditions.
      PubDate: Dec. 2019
      Issue No: Vol. 7, No. 4 (2019)
       
  • Sneak Circuit Identification of an Improved Boost Converter With
           Soft-Switching Realization
    • Authors: Junjie Hong;Xuewei Deng;Guidong Zhang;Zhiheng Huang;Xiyu Li;Yun Zhang;
      Pages: 2394 - 2402
      Abstract: Soft-switching techniques are well leveraged in power converters to improve efficiency, and disturbance or variation caused by parasitic parameters, however, this leads to undesired circuit paths (named sneak circuits), which may bypass the soft-switching path and may even incur terrible accidents. Therefore, it is of great significance to identify the sneak circuits and well design the soft-switching converters to avoid this issue. Based on the sneak circuit theory, this paper identifies the safe working range of a new designed boost converter with high-efficiency and high-voltage gain. For the proposed novel converter, only a small network is utilized to realize zero-current switching, zero-voltage transition, and zero-current transition functions for all of its switches. Detailed analyses and comparison between the proposed converter and the traditional one are demonstrated to reveal the proposed one's unique features. For the sneak circuit identifications, the efficiency involving practical parasitic parameters is deduced and analyzed for industrial applications based on sneak circuit. Finally, simulation results and experimental prototype are addressed to validate its effectiveness.
      PubDate: Dec. 2019
      Issue No: Vol. 7, No. 4 (2019)
       
  • Fault Diagnosis and Fault-Tolerant Control of Megawatt Power Electronic
           Converter-Fed Large-Rated Asynchronous Hydrogenerator
    • Authors: Anto Joseph;Thanga Raj Chelliah;Raghu Selvaraj;Kyo-Beum Lee;
      Pages: 2403 - 2416
      Abstract: In recent years, it has been difficult to achieve power converter redundancy in the multichannel voltage-source inverter (VSI)-fed large-rated doubly fed induction machines (DFIMs), and it has not yet been adopted in any commissioned variable-speed pumped storage power plants. Multichannel VSIs are a fundamental part of DFIMs, and they control the real and reactive powers of the machines. This paper presents the fault-tolerant operation of a large-rated DFIM hydrogenerating unit at open-switch faults in back-to-back VSIs. A technique for diagnosing the open-switch faults in grid-side and machineside converters is proposed. An open-switch fault is detected based on the variation in rotor currents and dc link voltage, which reduces the computational efforts during fault diagnosis. A 250-MW DFIM with five-channel three-level VSIs (each rated at 9 MVA) is simulated in the MATLAB/Simulink environment to observe the drive behavior. Finally, a 2.2-kW DFIM is tested in a laboratory environment to verify the experimental results.
      PubDate: Dec. 2019
      Issue No: Vol. 7, No. 4 (2019)
       
  • A Notch Filter-Based Active Damping Control Method for Low-Frequency
           Oscillation Suppression in Train–Network Interaction Systems
    • Authors: Zhikang Shuai;Huijie Cheng;Jiazhu Xu;Chao Shen;Yi Hong;Yong Li;
      Pages: 2417 - 2427
      Abstract: Low-frequency oscillation (LFO) in the train–network interaction system would easily lead to traction blockades and seriously threaten the normal operations of high-speed railway systems. This paper proposes a notch filter-based active damping (NFAD) control method to suppress the LFO. First, a small-signal model of the train–network interaction system is developed to investigate the LFO mechanism. By sensing and feeding back the input current of four-quadrant converter, NFAD control method is then formulated to emulate a virtual resistance in order to increase the system damping. Furthermore, a fundamental notch filter is designed to mitigate the damping influence of virtual resistance on the fundamental component. Finally, simulation and experimental results are employed to demonstrate reliability and effectiveness of the proposed method.
      PubDate: Dec. 2019
      Issue No: Vol. 7, No. 4 (2019)
       
  • Dynamic Average-Value Modeling of Three-Level T-Type Grid-Connected
           Converter System
    • Authors: Shuai Xu;Jianzhong Zhang;Yingwei Huang;Juri Jatskevich;
      Pages: 2428 - 2442
      Abstract: Three-level T-type converter (3LT2C) possesses the advantages of simple structure and high efficiency, which makes it appealing especially in low- and medium-voltage applications. Dynamic average-value modeling (AVM) has become an effective methodology for small-signal analysis and large-signal transients of power electronic subsystems in power systems applications. In this paper, a dynamic AVM for the three-phase 3LT2C is presented for the first time. The proposed model is derived using the state-space average approach, where the averaging process is implemented over each pulsewidth modulation switching period. The ac- and dc-side dynamics are represented by a fourth-order time-invariant system. The accuracy of the developed AVM is validated against the detailed switching model, while demonstrating its computational advantages. The new model is also verified using experimental tests on a prototype.
      PubDate: Dec. 2019
      Issue No: Vol. 7, No. 4 (2019)
       
  • Analysis for the Minimization of Leakage and Common Mode Currents in
           Cascaded Half-Bridge PV Fed Multilevel Inverter
    • Authors: Venu Sonti;Sumon Dhara;Piyusha Kukade;Sachin Jain;Vivek Agarwal;
      Pages: 2443 - 2452
      Abstract: This paper gives the detailed study and analysis of the terminal voltage and the common mode voltage (CMV) for the photovoltaic fed cascaded half-bridge (CHB) multilevel inverter (MLI). The expression for the terminal voltage and CMV are also derived using switching function. The analytical waveforms obtained using the expression of the terminal voltage and CMV clearly indicate that the terminal voltage and CMV are not constant simultaneously. Thus, two pulsewidth modulation (PWM) schemes are proposed using redundant states concept for CHB nine-level MLI without the addition of any extra circuit element. The first PWM scheme reduces the high-frequency transitions in the terminal voltage and, thus, minimizes the leakage current. The other PWM scheme is designed to reduce the common mode current by maintaining CMV constant. Furthermore, the proposed PWM schemes are compared with the conventional PWM schemes. The effect of each PWM schemes on the terminal voltage and CMV is analyzed using the given switching function analysis. The given switching function analysis is also supported with the help of simulation and experimental results. The simulation and experimental results of the proposed PWM schemes are further compared with the conventional SPWM technique.
      PubDate: Dec. 2019
      Issue No: Vol. 7, No. 4 (2019)
       
  • PI Passivity-Based Control and Performance Analysis of MMC Multiterminal
           HVDC Systems
    • Authors: Gilbert Bergna-Diaz;Daniele Zonetti;Santiago Sanchez;Romeo Ortega;Elisabetta Tedeschi;
      Pages: 2453 - 2466
      Abstract: In this paper, a decentralized PI passivity-based controller is applied to modular multilevel converters to ensure global stability of a multiterminal high-voltage direct current system. For the derivation of the controller, an appropriate model with constant steady-state solutions is obtained via a multifrequency orthogonal coordinates transformation. The control design is then completed using passivity arguments, and performance guarantees are established by a small-signal analysis. The obtained results are validated by means of detailed time-domain simulations both on a single-terminal and a four-terminal benchmarks.
      PubDate: Dec. 2019
      Issue No: Vol. 7, No. 4 (2019)
       
  • Parametrizable Fixed-Point Arithmetic for HIL With Small Simulation Steps
    • Authors: Alberto Sanchez;Angel de Castro;Javier Garrido;
      Pages: 2467 - 2475
      Abstract: Hardware-in-the-loop (HIL) techniques are increasingly used for test purposes because of their advantages over classical simulations. Field-programmable gate arrays (FPGAs) are becoming popular in HIL systems because of their parallel computing capabilities. In most cases, FPGAs are mainly used for signal processing, such as input pulsewidth modulation sampling and conditioning, while there are also processors to model the system. However, there are other HIL systems that implement the model in the FPGA. For FPGA implementation and regarding the arithmetics, there are two main possibilities: fixed-point and floating-point. Fixed-point is the best choice only when real-time simulations with small simulation steps are needed, while floating point is the common choice because of its flexibility and ease of use. This paper presents a novel hybrid arithmetic for FPGAs called parametrizable fixed-point which takes advantage of both arithmetics as the internal operations are accomplished using simple signed integers, while the point location of the variables can be adjusted as necessary without redesigning the model of the plant. The experimental results show that a buck converter can be modeled using this novel arithmetic with a simulation step below 20 ns. Besides, the experiments prove that the proposed model can be adjusted to any set of values (voltages, currents, capacitances, and so on.) keeping its accuracy without resynthesizing, showing the big advantage over the fixed-point arithmetic.
      PubDate: Dec. 2019
      Issue No: Vol. 7, No. 4 (2019)
       
  • Dynamic Voltage Restorer With Quasi-Newton Filter-Based Control Algorithm
           and Optimized Values of PI Regulator Gains
    • Authors: Talada Appala Naidu;Sabha Raj Arya;Rakesh Maurya;
      Pages: 2476 - 2485
      Abstract: In this paper, a three-phase three-wire dynamic voltage restorer (DVR) system has been chosen with quasi-Newton (QN) filter-based control algorithm. It uses Hessian matrix iteratively which is also named as QN based on modified Broyden- Fletcher-Goldfarb-Shanno (MBFGS) in each phase. The main features of this algorithm are the fundamental frequency estimation, rejection of harmonics its components, and tracking of the peak value of voltage or current. As DVR in this application has been implemented for compensation of voltage disturbances like imbalance and distortions along with voltage sag and swell, the fundamental component (FC) of the supply voltage is essential components to design control algorithm. The QN technique using MBFGS has been used for exaction of the FC from each disturbed supply voltage, which has been utilized in generating the reference load voltage. For proportional integrator (PI) regulator gains estimation, the population-based optimization technique, called as multiverse optimization (MVO), has been introduced in this paper. The MVO algorithm has adaptive coefficients which gives the benefits of smoothly maximizing the possibility of wormholes in the universe and increases the accuracy of the local search. The validation of control algorithm with optimization techniques-based PI tuning for DVR has been done using MATLAB software and real-time implementation.
      PubDate: Dec. 2019
      Issue No: Vol. 7, No. 4 (2019)
       
  • Fault-Tolerant Control of CPS-PWM-Based Cascaded Multilevel Inverter With
           Faulty Units
    • Authors: Liansong Xiong;Fang Zhuo;Xiaokang Liu;Zhao Xu;Yixin Zhu;
      Pages: 2486 - 2497
      Abstract: Bypassing the faulty power unit(s) of the regenerative cascaded multilevel inverter (CMI) directly results in a series of adverse influences. The existing solutions are not easy to implement and only effective for the V-connected devices composed of regenerative CMIs. To bypass the faulty power units seamlessly, the corresponding control strategies must guarantee: 1) constant equivalent switching frequency; 2) constant sampling frequency; and 3) constant fundamental voltage amplitude. To this end, a generic fault-tolerant control strategy, which adjusts the carrier frequency and simultaneously changes the CMI dc voltage and/or the modulation ratio, is presented in this paper. It is applicable for the device composed of carrier phase-shifting pulsewidth modulation (CPS-PWM)-based CMIs to ride through faults seamlessly, whether it is a single-phase system, a three-phase system (being it A-connected or V-connected), or a multiphase system. The detailed implementation is also analyzed by modeling the output voltage of the CPS-PWM-based CMI. The experimental results verify the validity and superiority of the proposed fault-tolerant strategy for the CPS-PWM-based CMI system with faulty power units.
      PubDate: Dec. 2019
      Issue No: Vol. 7, No. 4 (2019)
       
  • A New Generalized Multilevel Converter Topology Based on Cascaded
           Connection of Basic Units
    • Authors: Jagabar Sathik Mohamed Ali;Rasoul Shalchi Alishah;N. Sandeep;Seyed Hossein Hosseini;Ebrahim Babaei;Krishnasamy Vijayakumar;Udaykumar R. Yaragatti;
      Pages: 2498 - 2512
      Abstract: In this paper, a new single-phase multilevel converter (MLC) topology based on the cascade connection of novel basic units is presented. The proposed basic unit generates 17-level output voltage waveform and can be extended for higher voltage levels by using a simple cascade connection. Both the proposed basic unit and cascaded topologies are compared with other state-of-the-art MLC topologies. From the comparison results, it will be shown that the proposed topology has several advantages such as the reduced number of power electronic components, lesser number of dc sources, and blocking voltage. Moreover, the proposed MLC has reduced power losses and improved efficiency. The operability and feasibility of the proposed converter are validated through extensive simulation and experiments. Finally, the corresponding results affirming the predominance of the proposed topologies are presented.
      PubDate: Dec. 2019
      Issue No: Vol. 7, No. 4 (2019)
       
  • A Three-Port LLC Resonant DC/DC Converter
    • Authors: Junjun Zhang;Wei Jiang;Tianyang Jiang;Shuai Shao;Yaojie Sun;Bo Hu;Junming Zhang;
      Pages: 2513 - 2524
      Abstract: This paper proposes a new three-port LLC resonant converter which integrates input port, storage port, and load port in one converter. A pulse-frequency modulation and phaseshift combined control method are adopted for the proposed topology. It has four different operation modes with different gains and different power directions between input port, storage port, and load port, which are attractive for renewable energy with energy storage system applications. The proposed topology operates under resonant frequency, which is easy to implement with digital control, and it can achieve soft switching for almost all the switches and diodes similar to conventional LLC resonant converter. The performance of the proposed converter is validated by the experimental results from a 500-W prototype with 1.25-A maximum output current.
      PubDate: Dec. 2019
      Issue No: Vol. 7, No. 4 (2019)
       
  • A Method to Eliminate Steady-State Error of Model Predictive Control in
           Power Electronics
    • Authors: Margarita Norambuena;Pablo Lezana;Jose Rodriguez;
      Pages: 2525 - 2530
      Abstract: Finite control set model predictive control (FCS-MPC) allows dealing with nonlinearities of the system and obtains a fast dynamic response. Therefore, FCS-MPC is a good alternative to govern complex power converters or when fast transient operation is required. The main drawback of FCS-MPC is the performance obtained during steady state, one of the problems is the presence of nonzero error in steady state. This paper presents a new way to implement FCS-MPC to correct the mismatch in the model parameters and eliminate the error in steady state. This is achieved through the incorporation of the past error in the action of the control, adding an additional term in the cost function with a variable weighting factor.
      PubDate: Dec. 2019
      Issue No: Vol. 7, No. 4 (2019)
       
  • Adaptive Maximum Torque per Ampere Control of Synchronous Reluctance
           Motors by Radial Basis Function Networks
    • Authors: Ludovico Ortombina;Fabio Tinazzi;Mauro Zigliotto;
      Pages: 2531 - 2539
      Abstract: As neodymium and other rare earth materials become a critical commodity, the exploitation of reluctance torque in synchronous motors is certainly an interesting option. Alternative motor topologies span from internal permanent magnet motors to pure reluctance machines. Anyway, any anisotropic structure suffers from some magnetic nonlinearities that call for more sophisticated models to get an efficient torque control. Neural network-based algorithms are good candidates for modeling the current-to-flux linkages curves of synchronous reluctance (SynR) motors, but so far their use was limited by the inherent complexity and the computational burden. This paper proposes the use of a special kind of neural networks, namely, the radial basis function networks, to get the magnetic model of any synchronous motor, including saturation and cross-coupling effects. Through experimental evidence, it will be shown that the structure is light enough to be implemented, trained, and self-updated online on standard high-end ac drives. The model is used to track online the maximum torque-per-ampere working point of a SynR motor drive.
      PubDate: Dec. 2019
      Issue No: Vol. 7, No. 4 (2019)
       
  • Advanced Modulations for a Current-Fed Isolated DC–DC Converter With
           Wide-Voltage-Operating Ranges
    • Authors: Linglin Chen;Luca Tarisciotti;Alessandro Costabeber;Fei Gao;Patrick Wheeler;Pericle Zanchetta;
      Pages: 2540 - 2552
      Abstract: An active-bridge-active-clamp (ABAC) topology with its associated switching patterns and modulation techniques is introduced in this paper. The topology has been designed to comply with stringent power quality requirements in a More Electric Aircraft application. The dual transformer secondary structure of the ABAC allows the definition of a particular phase shift-based switching pattern. The proposed switching pattern ensures not only the output current switching harmonics elimination but also even power sharing between the secondary half-bridges. Consequently, passives on the low-voltage side of the converter are minimized, and transformer dc bias is eliminated. All these features can be achieved independently from the operating point of the converter. In this paper, the basic operation of the ABAC converter is first introduced. The theoretical analysis of switching harmonics elimination and power sharing is then carried out in the development of the proposed switching patterns. The theoretical claims are validated by both simulation and experimental results on a 10-kW 270-V/28-V ABAC converter.
      PubDate: Dec. 2019
      Issue No: Vol. 7, No. 4 (2019)
       
  • Adapted Auxiliary-Resonant Commutated Pole in the Dual-Active Bridge
    • Authors: Johannes Voss;Julia Warmuz;Deepa Mathai;Rik W. De Doncker;
      Pages: 2553 - 2560
      Abstract: In this paper, a dual-active bridge direct current (dc)-dc converter with an adapted auxiliary-resonant commutated pole (ARCP) concept is presented. First, the classic ARCP is reviewed and subsequently, the adapted concept is explained. The adaptions guarantee a zero-voltage switching without applying an additional boost current as needed in the classic ARCP approach. Thus, the complexity of the resonant commutations is reduced and reliability can be increased. To obtain the optimal auxiliary switch, various power-electronic devices are compared in view of controllability, speed, and conduction losses in the second part. Possible auxiliary switch configurations for a high-power application are discussed, and measurement results are illustrated. Here, integrated gate-commutated thyristors, thyristors, and insulated-gate bipolar transistors in combination with SiC diodes are compared, and differences in the switching behavior are presented. Finally, experimental test results of the converter at low voltages are presented.
      PubDate: Dec. 2019
      Issue No: Vol. 7, No. 4 (2019)
       
  • Common-Mode EMI Unterminated Behavioral Model of Wide-Bandgap-Based Power
           Converters Operating at High Switching Frequency
    • Authors: Bingyao Sun;Rolando Burgos;Dushan Boroyevich;
      Pages: 2561 - 2570
      Abstract: With wide-bandgap semiconductors increasing their commercial availability, high switching frequency operation has become an accepted practice to increase power density in power converters. High switching frequency operation, nonetheless, increases the electromagnetic interference (EMI) emissions of converters, for which accurate models are needed in order to predict their EMI noise and aid in the design of necessary filters. To this end, this paper assays first the impact that high switching frequency has on converter EMI emissions, and second, uses an unterminated behavioral model (UBM) to predict the commonmode (CM) emissions in the conducted EMI range (150 kHz- 30 MHz). To achieve this, a new extraction procedure is developed for a UBM to effectively capture the rich high-frequency content of the CM emissions, providing a solution to the inherent limitations of previous behavioral models developed for insulatedgate bipolar transistor-based converters. The experimental results obtained with two setups: a 3-kW, 300-V dc, silicon-carbidebased three-phase inverter switching at 70 kHz and a 1-kW, 400-V dc, gallium nitride -based three-phase inverter switching at 500 kHz are presented to validate the approach and the model capabilities.
      PubDate: Dec. 2019
      Issue No: Vol. 7, No. 4 (2019)
       
  • Performance of Brushless Induction Excited Synchronous Generator
    • Authors: Chandan Chakraborty;Yalla Tirumala Rao;
      Pages: 2571 - 2582
      Abstract: This paper reports a brushless induction excited synchronous generator. An induction machine (IM) and a synchronous machine (SM) are embedded in the same machine frame. To avoid the magnetic interaction between these two machines, they are configured for different numbers of poles. However, rotor windings of both machines are electrically coupled using a rotating rectifier. Therefore, field current of the SM can be controlled smoothly from stator side of the IM. Thus, this machine is expected to be more compact and cost effective compared to traditional pilot exciter-based brushless and permanent magnet less synchronous generators. In this paper, SM and IM are configured for four and six poles, respectively. The IM is operated in self-excited or power-zero mode such that it need not draw any active power from the external source at steady state. This is achieved by operating the IM at negative slip through a closed loop controller. A Vector control-based voltage regulation algorithm is proposed and dynamic performance of this controller is examined using PLECS. A 5.5 kVA laboratory prototype has been designed and fabricated to demonstrate the usefulness of the proposed generator and the controller.
      PubDate: Dec. 2019
      Issue No: Vol. 7, No. 4 (2019)
       
  • Proceedings of the IEEE
    • Pages: 2583 - 2583
      Abstract: Advertisement, IEEE.
      PubDate: Dec. 2019
      Issue No: Vol. 7, No. 4 (2019)
       
  • Introducing IEEE Collabratec
    • Pages: 2584 - 2584
      Abstract: Advertisement, IEEE. IEEE Collabratec is a new, integrated online community where IEEE members, researchers, authors, and technology professionals with similar fields of interest can network and collaborate, as well as create and manage content. Featuring a suite of powerful online networking and collaboration tools, IEEE Collabratec allows you to connect according to geographic location, technical interests, or career pursuits. You can also create and share a professional identity that showcases key accomplishments and participate in groups focused around mutual interests, actively learning from and contributing to knowledgeable communities. All in one place! Learn about IEEE Collabratec at ieeecollabratec.org.
      PubDate: Dec. 2019
      Issue No: Vol. 7, No. 4 (2019)
       
 
 
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