Analysis and Optimization of the Coordinated Multi-VSG Sources

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...

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Bibliographic Details
Published in:Electronics (Basel) 2019-01, Vol.8 (1), p.28
Main Authors: Yan, Xiangwu, Rasool, Aazim, Abbas, Farukh, Rasool, Haaris, Guo, Hongxia
Format: Article
Language:English
Subjects:
Damping
Distributed generation
Energy storage
Generators
Inertia
Inverters
Maximum power
Optimization
Renewable energy sources
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Summary: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.
ISSN:2079-9292
2079-9292
DOI:10.3390/electronics8010028