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Electronics 2019, 8(1), 28; https://doi.org/10.3390/electronics8010028

Analysis and Optimization of the Coordinated Multi-VSG Sources

1
Department of Electrical Engineering, North China Electric Power University, Baoding 071003, China
2
Goldwind Science and Technology, Co. Ltd., Beijing 100176, China
3
School of Electronics, Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
4
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)
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Abstract

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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