 Subjects -> ELECTRONICS (Total: 207 journals)
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- Coordinated control of wind farm and supercapacitor energy storage system
for dynamic performance reinforcement of multi-area power systems-
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Authors: Asima Syed, Mairaj ud Din Mufti
Pages: 261 - 279
Abstract: In this paper, a simple and effective control approach to exploit the primary frequency support competency of doubly fed induction generator (DFIG)-based wind turbines (WT) is presented. Furthermore, a small rating supercapacitor energy storage system (SCESS) is also integrated to reinforce the frequency regulation in the studied multi-area power system. A control-oriented strategy is employed to develop a discrete-time predictive control (DPC) for SCESS. The dynamic energy level thresholds are generated by representing the SCESS primary control by a first-order lag block for obtaining a discrete-time state-space model which yields the modified power constraints. Furthermore, the power thresholds of the power conditioning system (PCS) are chosen meticulously. The uprightness of the proposed scheme is manifested by the time-domain simulation results exhibiting considerable damping of the power system oscillations along with substantial curtailment in frequency nadir, with all the power and energy constraints of SCESS accounted for. The eigenvalue analysis is also carried out to validate the MATLAB/Simulink-based simulation results.
Keywords: doubly fed induction generator; frequency support; discrete-time predictive control; supercapacitor energy storage
Citation: International Journal of Power Electronics, Vol. 17, No. 3 (2023) pp. 261 - 279
PubDate: 2023-04-04T23:20:50-05:00
DOI: 10.1504/IJPELEC.2023.129981
Issue No: Vol. 17, No. 3 (2023)
- Single-phase cross-connected sources asymmetric T-type multilevel inverter
with fault tolerant capabilities-
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Authors: Vinay Kumar, Sanjeev Singh, Shailendra Jain
Pages: 280 - 298
Abstract: This work presents a cross-connected sources asymmetric T-type multilevel inverter (CCSATT-MLI) for single-phase operation with fault tolerant (FT) capabilities. The presented topology uses only one extra power semiconductor switch in the CCSATT 13-level (13L) inverter for fully FT operation. The paper uses two control schemes namely phase opposition disposition sinusoidal pulse width modulation (POD-SPWM) and nearest level control (NLC) for achieving the desired results under single switch open circuit (SSOC) fault. The obtained simulation results of proposed topology using MATLAB/Simulink are presented to show FT operation of the MLI under any SSOC fault. The simulation validations are validated under each switch fault using OpalRT hardware in loop (HIL) platform. The presented topology is also compared with recently reported MLI topologies for reduced number of count claim and effective FT operation in symmetric as well as asymmetric configurations.
Keywords: asymmetric T-type; cross-connected source; fault tolerant; multilevel inverter; MIL; nearest level control; NLC; pulse width modulation; single switch open circuit; SSOC; total harmonic distortion; THD
Citation: International Journal of Power Electronics, Vol. 17, No. 3 (2023) pp. 280 - 298
PubDate: 2023-04-04T23:20:50-05:00
DOI: 10.1504/IJPELEC.2023.129975
Issue No: Vol. 17, No. 3 (2023)
- Modelling, analysis and control of bidirectional SEPIC converter for
energy storage applications-
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Authors: Arnab Ghosh, Jayadev Meher, Santosh Sonar, Subrata Banerjee
Pages: 299 - 332
Abstract: Energy storage systems appear to be a very promising field of research for the rapidly increased requirements of the applications of renewable sources in daily life. The DC-DC bidirectional converters (BDCs) are globally known for their versatile applications in battery chargers, electric vehicles (EVs), solar PV modules with energy storage systems, smart/microgrid, telecommunication systems, etc. Such demanding applications are mostly essential for suitable bidirectional converters for delivering the energy in both directions. In this work, the closed-loop analysis, modelling and control of a DC-DC bidirectional SEPIC converter with classical controllers [such as proportional integral derivative (PID) controller, type-II controller and type-III controller] and advanced controller [such as internal model controller (IMC)] are demonstrated. The bidirectional SEPIC converter has been modelled here by using the state-space averaging (SSA) method. It is noticed that the bidirectional converter with IMC shows better controlling action compared to other classical control algorithms for its better steady state and transient responses. Finally, experimental verification of proposed closed-loop converter control is performed.
Keywords: bidirectional SEPIC converter; small signal analysis; classical controllers; advanced controller; energy storage system
Citation: International Journal of Power Electronics, Vol. 17, No. 3 (2023) pp. 299 - 332
PubDate: 2023-04-04T23:20:50-05:00
DOI: 10.1504/IJPELEC.2023.129974
Issue No: Vol. 17, No. 3 (2023)
- PV micro-inverter with passive equaliser for high power acquisition
ratio-
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Authors: Dongchun Wu, Fei Zhu, Jiawei Tang, Jun Liu, Yunya Wu
Pages: 333 - 355
Abstract: The micro-inverter is one of the important and efficient utilisation forms of photovoltaic power generation. Generally, there are 3-4 sub-modules in a PV module. When the light intensity is different among sub-modules, the output power of the PV module is dramatically decreased even if a micro-inverter is equipped. A passive equaliser integrated into full-bridge PV micro-inverter is proposed, which is composed of cascaded voltage-doubler rectifiers and a LC series resonant network. The proposed equaliser can be well operated without any additional control and it can supply the current/energy to the sub-module under part shadow. At last, all of the PV sub-modules can be operated near their maximum power point. The operational modes and the design principle of parameters are analysed. The simulation and experimental results verify the obvious advantage in increasing the power acquisition rate to PV panel.
Keywords: PV micro-inverter; voltage equaliser; differential power processing; DPP; LC resonance; power acquisition ratio
Citation: International Journal of Power Electronics, Vol. 17, No. 3 (2023) pp. 333 - 355
PubDate: 2023-04-04T23:20:50-05:00
DOI: 10.1504/IJPELEC.2023.129993
Issue No: Vol. 17, No. 3 (2023)
- Performance evaluation of a standalone hybrid microgrid for a rural
community using various dispatch strategies-
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Authors: Vijay Kumar Garg, Sudhir Sharma
Pages: 356 - 383
Abstract: Distributed energy sources prove to be a viable alternative for electricity in rural/remote areas. In this paper, the performance of a standalone hybrid microgrid comprising of solar photovoltaic (PV), diesel generator (DG), and battery energy storage system (BESS) has been evaluated for a small rural community. The overall aim is to propose sustainable, economical and reliable electricity supply in rural/remote areas. The optimum sizing of various units has been evaluated using hybrid optimisations multiple energy resources (HOMER) simulations with four dispatch strategies, i.e., load following, cycle charging, combine dispatch, and predictive dispatch. The outcomes show that the PV-DG-BESS system is an optimal solution based on net present cost (NPC) and cost of energy (COE) parameters under a predictive dispatch strategy. The sustainability of the optimum hybrid microgrid has been evaluated using sensitivity analysis using various input parameters.
Keywords: hybrid microgrid; solar photovoltaic; hybrid renewable energy sources; dispatch strategies; sensitivity analysis; cost of energy; COE; battery energy storage system; BESS; hybrid optimisations multiple energy resources; HOMER; net present cost; NPC
Citation: International Journal of Power Electronics, Vol. 17, No. 3 (2023) pp. 356 - 383
PubDate: 2023-04-04T23:20:50-05:00
DOI: 10.1504/IJPELEC.2023.129987
Issue No: Vol. 17, No. 3 (2023)
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