A Reactive Power-Voltage Control Strategy of an AC Microgrid Based on Adaptive Virtual Impedance

Energies

JosepM. Guerrero¹  Jianping Zheng²  Fang Guo³  Yao Liu⁴  Lin Guan⁴  Chao Liu⁵  Jianfu Chen⁵ 

[1] Department of Energy Technology, Aalborg University, DK-9220 Aalborg East, Denmark;Development Department of Guangdong Power Grid Corporation, Guangzhou 510030, China;School of Automation Foshan University, Foshan 528225, China;School of Electric Power, South China University of Technology, Guangzhou 510640, China;Zhuhai Power Supply Bureau of Guangdong Power Grid Corporation, Zhuhai 519000, China;

关键词: microgird;    distributed power;    adaptive virtual impedance;    reactive power sharing;    voltage recovery mechanism;   

DOI  :  10.3390/en12163057

来源: DOAJ

【 摘 要 】

As an effective carrier of distributed generation, a microgrid is an effective way to ensure that distributed power can be reasonably utilized. However, due to the property of line impedance and other factors in a microgrid, reactive power supplied by distributed generation units cannot be shared rationally. To efficiently improve reactive power sharing, this paper proposes a reactive power-voltage control strategy based on adaptive virtual impedance. This method changes the voltage reference value by adding an adaptive term based on the traditional virtual impedance. Meanwhile, a voltage recovery mechanism was used to compensate the decline of distributed generation (DG) output voltage in the process. MATLAB/Simulink simulations and experimental results show that the proposed controller can effectively improve the steady state performance of the active and reactive power sharing. Finally, the feasibility and effectiveness of the proposed control strategy were verified.

【 授权许可】

Unknown