Analysis and Optimization of the Coordinated Multi-VSG Sources

Electronics

Hongxia Guo¹  Xiangwu Yan²  Aazim Rasool²  Haaris Rasool³  Farukh Abbas⁴ 

[1] Boulevard de la Plaine 2, 1050 Ixelles, Belgium;Department of Electrical Engineering, North China Electric Power University, Baoding 071003, China;Electrical Engineering and Power Electronics Department, Vrije Universiteit Brussel;School of Electronics, Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;

关键词: virtual synchronous generator;    parallel VSGs;    droop control;    optimization;    multiple VSGs coordination;    island microgrid;   

DOI  :  10.3390/electronics8010028

来源: DOAJ

【 摘 要 】

The penetration of renewable energy sources (RES) into a grid via inverters causes a stability issue due to the absence of an inertia. A virtual synchronous generator (VSG) is designed to provide an artificial inertia and droop control to the grid-connected inverters. The different power ratings of multiple VSGs create complications in the coordination due to unequal droop or damping coefficient ‘ D ’. The dependency of a factor ‘ D ’ on P − ω droop control under static state and a damping behavior during power oscillation under dynamic state is analyzed by considering three cases on multi-VSGs microgrid system and the equivalent equations of P − ω droop control are derived for all three cases to see the effect of a load on the overall system’s frequency. A master–slave configuration of a VSG is proposed to deliver maximum power during static state, but provides P − ω control during the dynamic state. Simulation results verify the improvement introduced by the proposed VSG control.

【 授权许可】

Unknown