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  Subjects -> ELECTRONICS (Total: 175 journals)
Showing 1 - 200 of 277 Journals sorted alphabetically
Acta Electronica Malaysia     Open Access  
Advances in Biosensors and Bioelectronics     Open Access   (Followers: 7)
Advances in Electrical and Electronic Engineering     Open Access   (Followers: 5)
Advances in Electronics     Open Access   (Followers: 76)
Advances in Magnetic and Optical Resonance     Full-text available via subscription   (Followers: 8)
Advances in Microelectronic Engineering     Open Access   (Followers: 13)
Advances in Power Electronics     Open Access   (Followers: 33)
Advancing Microelectronics     Hybrid Journal  
Aerospace and Electronic Systems, IEEE Transactions on     Hybrid Journal   (Followers: 305)
American Journal of Electrical and Electronic Engineering     Open Access   (Followers: 24)
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: 13)
Autonomous Mental Development, IEEE Transactions on     Hybrid Journal   (Followers: 8)
Bell Labs Technical Journal     Hybrid Journal   (Followers: 28)
Bioelectronics in Medicine     Hybrid Journal  
Biomedical Engineering, IEEE Reviews in     Full-text available via subscription   (Followers: 19)
Biomedical Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 35)
Biomedical Instrumentation & Technology     Hybrid Journal   (Followers: 6)
Broadcasting, IEEE Transactions on     Hybrid Journal   (Followers: 12)
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: 44)
China Communications     Full-text available via subscription   (Followers: 8)
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: 253)
Edu Elektrika Journal     Open Access   (Followers: 1)
Electrica     Open Access  
Electronic Design     Partially Free   (Followers: 104)
Electronic Markets     Hybrid Journal   (Followers: 7)
Electronic Materials Letters     Hybrid Journal   (Followers: 4)
Electronics     Open Access   (Followers: 85)
Electronics and Communications in Japan     Hybrid Journal   (Followers: 10)
Electronics For You     Partially Free   (Followers: 91)
Electronics Letters     Hybrid Journal   (Followers: 26)
Elkha : Jurnal Teknik Elektro     Open Access  
Embedded Systems Letters, IEEE     Hybrid Journal   (Followers: 50)
Energy Harvesting and Systems     Hybrid Journal   (Followers: 4)
Energy Storage Materials     Full-text available via subscription   (Followers: 2)
EPJ Quantum Technology     Open Access  
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: 185)
Haptics, IEEE Transactions on     Hybrid Journal   (Followers: 4)
IACR Transactions on Symmetric Cryptology     Open Access  
IEEE Antennas and Propagation Magazine     Hybrid Journal   (Followers: 96)
IEEE Antennas and Wireless Propagation Letters     Hybrid Journal   (Followers: 77)
IEEE Journal of Emerging and Selected Topics in Power Electronics     Hybrid Journal   (Followers: 46)
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: 65)
IEEE Transactions on Antennas and Propagation     Full-text available via subscription   (Followers: 69)
IEEE Transactions on Automatic Control     Hybrid Journal   (Followers: 55)
IEEE Transactions on Circuits and Systems for Video Technology     Hybrid Journal   (Followers: 19)
IEEE Transactions on Consumer Electronics     Hybrid Journal   (Followers: 39)
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: 70)
IEEE Transactions on Signal and Information Processing over Networks     Full-text available via subscription   (Followers: 11)
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 Microwaves, Antennas & Propagation     Hybrid Journal   (Followers: 35)
IET Nanodielectrics     Open Access  
IET Power Electronics     Hybrid Journal   (Followers: 45)
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: 57)
Industry Applications, IEEE Transactions on     Hybrid Journal   (Followers: 24)
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: 12)
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: 10)
International Journal of Antennas and Propagation     Open Access   (Followers: 11)
International Journal of Applied Electronics in Physics & Robotics     Open Access   (Followers: 5)
International Journal of Computational Vision and Robotics     Hybrid Journal   (Followers: 6)
International Journal of Control     Hybrid Journal   (Followers: 12)
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: 2)
International Journal of High Speed Electronics and Systems     Hybrid Journal  
International Journal of Image, Graphics and Signal Processing     Open Access   (Followers: 14)
International Journal of Microwave and Wireless Technologies     Hybrid Journal   (Followers: 8)
International Journal of Nano Devices, Sensors and Systems     Open Access   (Followers: 12)
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: 24)
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: 3)
Journal of Advanced Dielectrics     Open Access   (Followers: 1)
Journal of Artificial Intelligence     Open Access   (Followers: 10)
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: 23)
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: 7)
Journal of Electromagnetic Waves and Applications     Hybrid Journal   (Followers: 8)
Journal of Electronic Design Technology     Full-text available via subscription   (Followers: 6)
Journal of Electronics (China)     Hybrid Journal   (Followers: 4)
Journal of Energy Storage     Full-text available via subscription   (Followers: 4)
Journal of Field Robotics     Hybrid Journal   (Followers: 2)
Journal of Guidance, Control, and Dynamics     Hybrid Journal   (Followers: 162)
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: 7)
Journal of Low Power Electronics and Applications     Open Access   (Followers: 9)
Journal of Microelectronics and Electronic Packaging     Hybrid Journal  
Journal of Microwave Power and Electromagnetic Energy     Hybrid Journal  
Journal of Microwaves, Optoelectronics and Electromagnetic Applications     Open Access   (Followers: 10)
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: 28)
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 Rekayasa Elektrika     Open Access  
Jurnal Teknik 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: 5)
Microelectronics and Solid State Electronics     Open Access   (Followers: 18)
Nanotechnology Magazine, IEEE     Full-text available via subscription   (Followers: 33)
Nanotechnology, Science and Applications     Open Access   (Followers: 6)
Nature Electronics     Hybrid Journal  
Networks: an International Journal     Hybrid Journal   (Followers: 6)
Open Journal of Antennas and Propagation     Open Access   (Followers: 8)
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: 1)
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)
Security and Communication Networks     Hybrid Journal   (Followers: 2)
Selected Topics in Applied Earth Observations and Remote Sensing, IEEE Journal of     Hybrid Journal   (Followers: 53)
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: 75)
Solid-State Circuits Magazine, IEEE     Hybrid Journal   (Followers: 13)
Solid-State Electronics     Hybrid Journal   (Followers: 9)
Superconductor Science and Technology     Hybrid Journal   (Followers: 2)
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: 8)
Universal Journal of Electrical and Electronic Engineering     Open Access   (Followers: 6)
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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Journal Cover
IET Power Electronics
Journal Prestige (SJR): 0.803
Citation Impact (citeScore): 3
Number of Followers: 45  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 1755-4535 - ISSN (Online) 1755-4543
Published by IET Homepage  [42 journals]
  • Modular multilevel converters technology: a comprehensive study on its
           topologies, modelling, control and applications
    • Authors: Manchala Naini Raju;J. Sreedevi;Rajashekar P Mandi;K.S. Meera;
      Pages: 149 - 169
      Abstract: A modular multilevel converter (MMC) is one of the perfect topologies for high power and medium-/high-voltage energy conversion systems. The MMC has attractive features such as modularity, voltage and current scalability, transformerless operation, fault blocking capability, reduced filter size, a reduced ripple of the output current, high efficiency, and low expense on redundancy. These features attracted industries over the past few years, notable research has been carried out on MMC topologies, their operation, and control. This study presents a review of MMC topologies and their mathematical models. Furthermore, their control schemes (classical as well as model predictive controls) and modulation techniques are discussed. Finally, MMC applications and their future challenges are highlighted.
      PubDate: 2 20 2019
      Issue No: Vol. 12, No. 2 (2019)
       
  • Modular-multilevel converter topologies and applications – a review
    • Authors: Murthy Priya;Pathipooranam Ponnambalam;Kola Muralikumar;
      Pages: 170 - 183
      Abstract: Recently developed modular-multilevel converter (M-MC) has a major attention in the industry and research works which is moving into feasible technology for many medium and high-power applications. M-MCs have been improved by existing power conversion technology in several aspects, including efficiency, modular structure, power quality, transformerless operational capability, fault tolerant and redundancy operations having a low expense, standard components utilisation, high availability, excellent quality of output wave forms. However, as several challenges combined with M-MC topologies, include reduced voltage stress, compact size, and substantially lower semiconductor losses. These attributes the lower operating cost for high-power applications such as distribution systems and high-voltage direct current (HVDC) transmission systems. The main contribution of this study is to bring the scrutiny of M-MC applications and different circuit topologies. These M-MC configurations consist of converter structures with sub-module converters and M-MC family members. In such a way, the M-MC applications are generalised and it results the size and cost halved, reduced conduction and switching losses and increases system reliabilities. Moreover, in each application of M-MC, drawbacks, and advantages have been discussed in detail. This review presents the latest performance of M-MC with respect to the mentioned research areas and new applications.
      PubDate: 2 20 2019
      Issue No: Vol. 12, No. 2 (2019)
       
  • Isolated Buck-Boost converters with AC-TLR and dual-transformer structure
           for wide output voltage range applications
    • Authors: Hongfei Wu;Kai Sun;Tingting Liu;Yan Xing;
      Pages: 184 - 194
      Abstract: A novel isolated buck-boost (IBB) converter with a dual-transformer (DT) and an active-controlled three-level rectifier (AC-TLR) is proposed in this study. A new family of IBB converters is derived with different implementations of the AC-TLR. The two transformers in the converter supply power to the output alternatively through the phase-shift control of the active switch in the AC-TLR. A voltage-doubler configuration is built and three voltage levels are generated with the DT and AC-TLR structure. Therefore, the diodes and switches in the rectifier sustain only half of the high-output voltage and turns ratios of the transformers are reduced. In addition, the zero-voltage-switching operation of all the active switches on both the primary and secondary sides is achieved and the reverse-recovery problem of all the diodes is alleviated in the wide operation range. Furthermore, the output voltage of the converter is regulated in a wide range due to the buck and boost voltage conversion characteristics of the converter. The operational principles, modulation and characteristics of the converter are presented. Finally, a 400 V input and 350-750 V output prototype is built and tested to verify the effectiveness of the proposed converters.
      PubDate: 2 20 2019
      Issue No: Vol. 12, No. 2 (2019)
       
  • High-gain LCL architecture based IPT system for wireless charging of EV
    • Authors: Sooraj Varikkottil;J.L. Febin Daya;
      Pages: 195 - 203
      Abstract: In this study, a high-gain LCL topology based inductive power transfer (IPT) system is proposed for wireless charging of electric vehicle (EV). The hybrid resonance topology is modified to achieve high gain in the proposed system. The duty ratio of semiconductor switches is adjusted to control the primary power flow in the IPT system. A detailed mathematical model of the proposed system is obtained and performances are analysed under contingency in misalignment of the inductive coil. The developed prototype of IPT system is tested and the experimental studies substantiate the results of numerical simulation.
      PubDate: 2 20 2019
      Issue No: Vol. 12, No. 2 (2019)
       
  • Nine-level high-frequency inverter
    • Authors: Baojian Ji;Feng Hong;Xiaodong Huang;Yu Wu;
      Pages: 204 - 211
      Abstract: In the high-frequency AC (HFAC) power distribution system, problems such as high switching frequency, a complicated circuit configuration and difficult parameter design still exist in the traditional inverters. A multi-level high-frequency inverter topology based on a forward converter is proposed in this study, which implements the electrical isolation of input and output. With the introduction of variable turns ratio technology, the nine-level output is achieved, which is conductive to the decrease of output harmonics. The selected harmonic elimination method is also adopted to further reduce the output harmonic distortion through the Fourier analysis of output waveforms. Besides, the HFAC output can be achieved at a lower switching frequency for the maximum switching frequency is only double the output frequency. The detailed analysis on operating principles and parameter design of the proposed inverter are provided in this study. Finally, the feasibility of the inverter is verified by the simulations and experiments.
      PubDate: 2 20 2019
      Issue No: Vol. 12, No. 2 (2019)
       
  • Parallel current-fed resonant converter with balance current sharing and
           no input ripple current
    • Authors: Bor-Ren Lin;Yue Lin;
      Pages: 212 - 219
      Abstract: This studies a parallel current-fed resonant converter with the advantages of the balance current sharing and no input ripple current. The basic structure of the developed circuit includes a boost converter and half-bridge resonant converter with the same power switches to reduce switch counts. Two boost-type converters with an interleaved pulse with modulation are used in the front stage to eliminate input ripple current and reduce the size of boost inductor. Parallel resonant converter with magnetic coupling current balancing cell is adopted in the rear stage to automatically balance two resonant circuits and realise the zero-voltage turn-on switching for power devices. The voltage doubler circuit is employed on the secondary-side to achieve high-voltage output. The developed converter can be used for current-type input source and voltage-type output. Finally, experiments with 1 kW laboratory prototype are provided to confirm the feasibility of the proposed converter.
      PubDate: 2 20 2019
      Issue No: Vol. 12, No. 2 (2019)
       
  • Precise control strategy of dual-mode flyback DC/DC converter
    • Authors: Seok-Min Wi;Minsung Kim;
      Pages: 220 - 227
      Abstract: Flyback converters (FBCs) have been widely used in portable fuel-cell power systems since they feature step up/down ability, galvanic isolation between the input and output, and low cost. As the input/output voltage of the FBC varies, it may operate either in discontinuous-conduction mode (DCM) or in continuous-conduction mode (CCM). Since different modes of the FBC result in different dynamics, it is difficult to stabilise the converter operating in both modes. To solve the problem, the authors propose a controller that can control a dual-mode FBC whether it operates in DCM or in CCM. The proposed controller is composed of a dual-mode feed-forward control unit and a feed-back control unit based on the common Lyapunov function. The dual-mode feed-forward control signal is utilised to reduce the burden on the common Lyapunov function-based feed-back controller that must function well despite variable system dynamics. The closed-loop system guarantees global exponential stability and provides a fast transient response as the operating mode of the FBC switches between DCM and CCM. When constructing the proposed controller, they use the large-signal nonlinear averaged model of the dual-mode FBC and consider the parasitic components. Experimental tests were conducted to validate the proposed control scheme.
      PubDate: 2 20 2019
      Issue No: Vol. 12, No. 2 (2019)
       
  • Advanced small-signal-based analytical approach to modelling high-order
           power converters
    • Authors: Guidong Zhang;Yu Shen;Jie Chen;Samson Shenglong Yu;Herbert Ho-Ching Iu;Tyrone Fernando;Yun Zhang;
      Pages: 228 - 236
      Abstract: This study devises an advanced small-signal based approach (SSA) to model high-order power converter system (HOPCS); in detail, a 3-Z-network converter which employs a single switch to achieve high voltage gain is utilised as a typical example of HOPCS. Therein, four operating modes are detailed in terms of the states of electric current flowing through the inductors. The proposed SSA is performed by means of the state-space averaging technique and small-signal equivalent circuits in frequency domain. Based on the proposed approach, the derived transfer functions for input voltage, output voltage and control input yield deep insight into the dynamic responses of the converter in each working mode. In order to well validate the effectiveness of the proposed approach, numerical results and experimental prototype are conducted and measured, the results agree well with the theoretical analyses.
      PubDate: 2 20 2019
      Issue No: Vol. 12, No. 2 (2019)
       
  • A new family of non-isolated PWM DC–DC converter with soft switching
    • Authors: Elham Gerami;Majid Delshad;Mohammad Reza Amini;Mohammad Ruhollah Yazdani;
      Pages: 237 - 244
      Abstract: In this study, a new family of soft-switching pulse-width-modulated (PWM) converters with a lossless passive snubber is introduced. The switch is turned on under zero-current switching and turned off under zero-voltage switching and all diodes turn on and off under soft switching conditions. The proposed snubber consists of two resonant inductors a resonant capacitor and three diodes which can be applied to all non-isolated DC-DC converters. A buck converter with the proposed snubber is analysed and to verify theoretical analysis, a 100 W prototype is implemented and efficiency of converter compared with hard switching counterpart. Also to confirm the effectiveness of the proposed snubber to reduce conducted electromagnetic interference (EMI), the conducted EMI of a buck converter with proposed snubber cell is compared with conventional buck converter.
      PubDate: 2 20 2019
      Issue No: Vol. 12, No. 2 (2019)
       
  • Decoupled PI current controller for grid-tied inverters with improved
           transient performances
    • Authors: Rachid Errouissi;Ahmed Al-Durra;
      Pages: 245 - 253
      Abstract: This study proposes a novel decoupled proportional-integral (PI) current controller for grid-tied inverters. The proposed controller can be viewed as the modification of the existing decoupled PI current controller to include the reference jump in order to achieve nominal performance recovery in response to step changes in the current reference. The modified decoupled PI current controller is derived based on combining feedback-linearisation technique with a disturbance observer-based control approach that belongs to the high-gain observer technique. The key feature of the composite controller is its ability to retain the transient performance specified under the feedback-linearising control, particularly when the control does not saturate. Furthermore, by considering the control saturation in the observer design, an anti-windup scheme arises naturally into the controller, leading to an improved transient performance in the presence of saturation. The effectiveness of the proposed controller was verified by simulation and experimental results.
      PubDate: 2 20 2019
      Issue No: Vol. 12, No. 2 (2019)
       
  • Large time-delay decoupling and correction in synchronous complex-vector
           frame
    • Authors: Qi Xiao;Fen Tang;Zhen Xin;Jiayu Zhou;Pengfei Chen;Poh Chiang Loh;
      Pages: 254 - 266
      Abstract: This study presents an enhanced method for simultaneously achieving optimised disturbance damping and axis-decoupling in high-power converters operating in the synchronous rotating frame. High-power converters are considered here because they are normally constrained to a low-switching-to-fundamental pulse ratio, and hence experience a large control delay as a trade-off. This trade-off lowers bandwidth and phase margin, which in the synchronous frame, are further worsened by cross-coupling between the d- and q-axes. The proposed method, therefore, targets to remove axis-cross-coupling, so that the dynamics and stability of the high-power converter can be significantly improved, even with a large control delay. A procedure for optimising its performances has then been proposed, after evaluating pole-zero trajectories of three critical coefficients associated with filter decoupling, delay decoupling, and phase correction. Such coordinated evaluation using complex-vector models in the synchronous frame has previously not been performed and is hence a major contribution of the study. Simulation and experimental results presented have verified this contribution, the proposed method and its improvement over other recent methods found in the literature.
      PubDate: 2 20 2019
      Issue No: Vol. 12, No. 2 (2019)
       
  • MIC for reliable and efficient harvesting of solar energy
    • Authors: Allamsetty Hema Chander;Lalit Kumar;
      Pages: 267 - 275
      Abstract: In this study, a multi-input converter (MIC)-based module-level approach for harvesting maximum power in a photovoltaic system during partial shading is proposed. The MIC topology has a dedicated switch in series with each module to operate it at its maximum power point (MPP). Each module is independent of the other and achieves their respective MPP's under respective operating conditions. The MIC topology can also withstand open-circuit and module mismatch conditions. The proposed system offers simplicity in design, flexibility in control and reliability in operation with low-component count (number of switches and passive elements) consequently reduces the size, cost and complexity of the system. The complete system is comprehensively analysed for a standalone system under randomly selected conditions and is validated both by simulation studies in the MATLAB environment and exhaustive experimental studies on a laboratory prototype.
      PubDate: 2 20 2019
      Issue No: Vol. 12, No. 2 (2019)
       
  • Dynamic evolution control based power sharing method for hybrid energy
           storage system
    • Authors: Ujjal Manandhar;Benfei Wang;Abhisek Ukil;Hoay Beng Gooi;
      Pages: 276 - 283
      Abstract: In this study, a new dynamic evolution control (DEC) based power sharing method is proposed for hybrid energy storage system (HESS) with photovoltaic in the isolated DC grid application. The proposed control approach solves the current controller conflict problem in HESS and provides faster DC link voltage restoration. A DEC method is implemented to control the battery current, supercapacitor current and DC link voltage. A DEC method uses a predictive term and feed-forward term to regulate the current and voltage in the system. In the proposed control method, the battery supports the average power demand in the system. The supercapacitor supports the transient power demand, uncompensated power from the battery and error voltage term. Thus, it results in faster DC link voltage restoration and less stress in the battery system. The detailed design of the system parameters and controller parameters is presented in this study. Simulation and experimental studies validate the effectiveness of the proposed control method.
      PubDate: 2 20 2019
      Issue No: Vol. 12, No. 2 (2019)
       
  • Single-phase cascaded multilevel inverter topology addressed with the
           problem of unequal photovoltaic power distribution in isolated dc links
    • Authors: Bhupender Sharma;Jayaram Nakka;
      Pages: 284 - 294
      Abstract: This study presents a control scheme for a grid-connected cascaded H-bridge multilevel inverter (CHBMLI) based solar energy conversion system (SECS) addressing the problem of distinct temperature and irradiations which raise to partial shading and panel mismatch conditions in large-scale photovoltaic (PV) generation. Along with feasibility in high-voltage system, the major advantage of isolated dc links in CHBMLI suffers the distinct dc-link voltage conditions when employed as a pulse-width modulated (PWM) converter governing either unequal dc loads or dc sources due to variable power consumption or generation, respectively. The proposed control scheme has the ability of balancing the dc-link capacitors in each H-bridge cell of CHBMLI adopted for this system and during the above-said power generation mismatch conditions in SECS. The proposed system along with maximum and efficient energy conversion, the power quality in the grid-side voltage and injected currents is also monitored and maintained as per standards. In addition, the modelling analysis of the converter has also been derived to define the mathematical model of CHBMLI as PWM converter adopted for this application. The performance of system has been analysed using MATLAB simulation and validated experimentally on prototype model by using dSPACE-1104.
      PubDate: 2 20 2019
      Issue No: Vol. 12, No. 2 (2019)
       
  • Open-circuit fault diagnosis method for the T-type inverter based on
           analysis of the switched bridge voltage
    • Authors: Danjiang Chen;Yutian Liu;Shaozhong Zhang;
      Pages: 295 - 302
      Abstract: Multilevel inverter topologies have been widely used in applications of wide-power range. Therefore, fault diagnosis of such circuits is becoming more and more important. The T-type topology, which is one of many multilevel topologies, has an advantage in terms of efficiency compared to the neutral-point-clamped type. This study proposes a new diagnosis method of an open-circuit (OC) fault for a three-level T-type inverter (3LT2I). The proposed method is achieved by measuring the bridge voltage and its duration time. The bridge voltage includes information of switching states of 3LT2I but not affected by the load. First, according to polarity of the reference voltage and corresponding phase current, working period of the 3LT2I is divided into four working regions. Then, the bridge voltage is analysed in detail when an OC fault occurs in different working regions. At last, a fault diagnosis circuit is designed to achieve automatic diagnosis for the OC fault. Simulation and experimental results show that the proposed method can identify the faulty switch exactly and quickly.
      PubDate: 2 20 2019
      Issue No: Vol. 12, No. 2 (2019)
       
  • High-power-density high-efficiency LLC converter with an
           adjustable-leakage-inductance planar transformer for data centers
    • Authors: Peiwen He;Ayan Mallik;Gary Cooke;Alireza Khaligh;
      Pages: 303 - 310
      Abstract: LLC converters can achieve high efficiency, high- power density, wide gain range, and galvanic isolation. This study presents a high-power-density and high-efficiency LLC converter with an adjustable-leakage-inductance planar transformer for the DC-DC conversion in data center power supplies. A planar transformer with adjustable leakage inductance is modelled and developed to provide an accurate design for resonant frequency and voltage gain. A detailed power loss analysis is performed. Furthermore, a thermal model is provided to aid in heat sink design. GaN devices are used in the converter to achieve high-switching frequency and low-switching loss. A 450 kHz, 360-400 VDC input, 12 VDC output, 750 W LLC converter prototype with an adjustable-leakage-inductance planar transformer is built and tested. The power density of the system is 15.4 W/cm3 including an auxiliary power supply. The peak efficiency of the overall system is over 95%.
      PubDate: 2 20 2019
      Issue No: Vol. 12, No. 2 (2019)
       
  • Reduced switch-count structure for symmetric multilevel inverters with a
           novel switched-DC-source submodule
    • Authors: Hossein Nasiri Avanaki;Reza Barzegarkhoo;Elyas Zamiri;Yongheng Yang;Frede Blaabjerg;
      Pages: 311 - 321
      Abstract: The aim of this study is to present a new cost effective topology for Symmetric multilevel inverters (SMLIs) configurations, which can generate a great number of output voltage levels with a least of switching devices. The proposed structure contains a novel switched-dc-source (SDCS) sub-module that can produce three positive output voltage levels with a contribution of four equal dc voltage sources, two unidirectional, and one bi-directional power switches. Accordingly, to create a uniform staircase output voltage with multiple levels, the proposed SDCS sub-module is integrated into a new design. Therefore, a new family of reduced switch-count (RSC)-SMLIs is derived, which is capable of generating at least 13- and 15-level output voltages using only ten power switches and nine gate drivers. Furthermore, when employing several of the proposed SDCS sub-modules in series, a new generalised RSC-SMLI topology is obtained. Comparisons with prior-art SMLIs structures are done, which also highlights the beneficial potential of the proposed topology. To demonstrate the superior performance of the proposed topology, several simulation and experimental results have been provided.
      PubDate: 2 20 2019
      Issue No: Vol. 12, No. 2 (2019)
       
  • Performance comparison of Si IGBT and SiC MOSFET power devices based LCL
           three-phase inverter with double closed-loop control
    • Authors: Yitao Liu;Shiqi Jiang;Dianheng Jin;Jianchun Peng;
      Pages: 322 - 329
      Abstract: Grid-connected inverters are essential equipment for DC-AC energy conversion between renewable energy generation and power grids, and their performance directly affects the stability of the operation of the power grid. Compared to the traditional L or LC filter, LCL filter is widely used in the grid-connected inverter due to its harmonic attenuation performance and system stability. Because of the requirements for higher switching frequency to increase the power density and reduce the cost of the inverter. Compared to the traditional silicon (Si) insulated gate bipolar transistor (IGBT) power device, the silicon carbide (SiC) metal-oxide-semiconductor field-effect transistor (MOSFET) has shown apparent advantages in high-power density inverters with a high switching frequency. This study first analyses and compares the suppression effects of passive damping methods on the resonance peak of the LCL filter; then, a double-current closed-loop control strategy as the active damping control is applied in the LCL filter three-phase grid-connected inverter; finally, the experimental platforms of IGBT inverter and SiC MOSFET inverter are built, and the filtering performances of the two inverters are compared. The experimental results show that the double-closed-loop control method significantly reduces the system harmonics and confirms the feasibility of the control strategy.
      PubDate: 2 20 2019
      Issue No: Vol. 12, No. 2 (2019)
       
  • Adaptive shunt filtering control of UPQC for increased nonlinear loads
    • Authors: Saurav Roy Choudhury;Anubrata Das;Sandeep Anand;Sanjay Tungare;Yogesh Sonawane;
      Pages: 330 - 336
      Abstract: In a distribution system, to compensate for the effect of voltage sag/swell and mitigate harmonic currents, a unified power quality conditioner (UPQC) is used. Conventionally, the power rating of UPQC is determined based on the expected sag/swell, linear and nonlinear loads. However, with the shift towards usage of electronic loads and electrical drives, the composition of nonlinear loads is increasing. Hence, the UPQC deployed earlier may not be capable of handling increased harmonic currents due to its limited current rating. While trying to compensate for both harmonic currents and voltage sag/swell, the shunt converter (of UPQC) may reach its current limit and would result in undesirable behaviour. To address this issue, a technique to prioritise sag/swell compensation over active filtering is proposed in this study. The remaining power capacity of UPQC (after sag/swell compensation) is utilised for harmonic filtering. Adaptive determination of harmonic compensation current also allows prioritising the various harmonics to be compensated. This helps in case passive tuned filters are installed for some harmonic frequencies for which UPQC need not respond. Detailed simulation studies are performed on MATLAB/SIMULINK platform and results are included in this study. A laboratory prototype of single phase UPQC is developed to validate the performance of the proposed scheme.
      PubDate: 2 20 2019
      Issue No: Vol. 12, No. 2 (2019)
       
  • Improved single-phase self-synchronised synchronverter with enhanced
           dynamics and current limitation capability
    • Authors: Tarek Younis;Mohamed Ismeil;Essam K. Hussain;Mohamed Orabi;
      Pages: 337 - 344
      Abstract: Inertia-less power converters are one of the main obstructions to increase the penetration level of distributed energy resources in the utility grid. The stability of the power system mainly depends on the system inertia. Virtual synchronous machine and synchronverter-based grid-tied inverters have been introduced as a solution to this problem. Here, a modified self-synchronised synchronverter is introduced to enhance the dynamic response of the active power loop and to limit the injected active/reactive power to the grid. Furthermore, the injected current to the grid is limited during faults employing proportional-resonant-based inner current loop. Feed-forward voltage is implemented in the current control loop to achieve seamless transfer between standalone and grid-connection modes of operation. Extensive simulation and experimental results are obtained to verify the proposed enhanced controller.
      PubDate: 2 20 2019
      Issue No: Vol. 12, No. 2 (2019)
       
 
 
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