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Electronics 2019, 8(1), 28;

Analysis and Optimization of the Coordinated Multi-VSG Sources

Department of Electrical Engineering, North China Electric Power University, Baoding 071003, China
Goldwind Science and Technology, Co. Ltd., Beijing 100176, China
School of Electronics, Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Electrical Engineering and Power Electronics Department, Vrije Universiteit Brussel; Boulevard de la Plaine 2, 1050 Ixelles, Belgium
Author to whom correspondence should be addressed.
Received: 18 November 2018 / Revised: 14 December 2018 / Accepted: 21 December 2018 / Published: 26 December 2018
(This article belongs to the Special Issue Intelligent Modelling and Control in Renewable Energy Systems)
Full-Text   |   PDF [8036 KB, uploaded 26 December 2018]   |  


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. View Full-Text
Keywords: virtual synchronous generator; parallel VSGs; droop control; optimization; multiple VSGs coordination; island microgrid virtual synchronous generator; parallel VSGs; droop control; optimization; multiple VSGs coordination; island microgrid

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Yan, X.; Rasool, A.; Abbas, F.; Rasool, H.; Guo, H. Analysis and Optimization of the Coordinated Multi-VSG Sources. Electronics 2019, 8, 28.

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