An Energy-Feed Type Split-Capacitor Three-Phase Four-Wire Power Electronic Load Compatible with Various Load Demands

Shiyi Sun, Qingjun Huang, Bingyang Luo, Jianghua Lu, Jiapeng Luo, Zexu Ma and Guorong Zhu ()
Additional contact information
Shiyi Sun: State Key Laboratory of Disaster Prevention & Reduction for Power Grid, Changsha 410129, China
Qingjun Huang: Disaster Prevention and Reduction Center of Hunan Electric Power Co., Ltd. of State Grid, Changsha 410129, China
Bingyang Luo: School of Automation, Wuhan University of Technology, Wuhan 430070, China
Jianghua Lu: School of Automation, Wuhan University of Science and Technology, Wuhan 430081, China
Jiapeng Luo: School of Automation, Wuhan University of Technology, Wuhan 430070, China
Zexu Ma: School of Automation, Wuhan University of Technology, Wuhan 430070, China
Guorong Zhu: School of Automation, Wuhan University of Technology, Wuhan 430070, China

Energies, 2023, vol. 17, issue 1, 1-19

Abstract: Energy-feed power electronic loads can precisely control the phase and magnitude of the power supply output current, achieving the emulation of loads. Moreover, they can feed energy back to the grid for energy regeneration, demonstrating significant research value. This article proposes an energy-fed power electronic load topology and control method that can realize the static and dynamic simulation of linear and non-linear loads and take into account the simulation needs of single-phase, three-phase three-wire, and three-phase four-wire loads. The main circuit uses a two-stage back-to-back AC/DC/AC structure: the front side is a three-phase four-wire split capacitor PWM rectifier bridge, which is used to simulate loads under various operating conditions; the back side is a three-phase three-wire PWM inverter bridge, which realizes the energy feeding back to the grid and reduces the waste of energy; and the intermediate side uses a split capacitor to equalize the voltage and achieve voltage stabilization. The topology is analyzed under the simulation demands of three-phase balanced, three-phase unbalanced, single-phase and non-linear loads. Finally, a MATLAB(R2022a)/Simulink simulation platform is built for a power electronic load with a rated capacity of 200 kVA. The simulation results verify the effectiveness, feasibility, and advancement of the power electronic load proposed in this article.

Keywords: three-phase four-wire; power electronic loads; unbalanced loads; non-linear loads; split capacitor rectifiers (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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