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Research on Frequency Control of Islanded Microgrid with Multiple Distributed Power Sources
Open AccessArticle

A Self-Adaptive Damping Control Strategy of Virtual Synchronous Generator to Improve Frequency Stability

by Tianyang Li 1,2, Buying Wen 1,2,* and Huaiyuan Wang 1,2
1
Fujian Smart Electrical Engineering Technology Research Center, College of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350116, China
2
Jinjiang Science and Education Park of Fuzhou University, Fuzhou University, Quanzhou 362200, China
*
Author to whom correspondence should be addressed.
Processes 2020, 8(3), 291; https://doi.org/10.3390/pr8030291
Received: 10 February 2020 / Revised: 27 February 2020 / Accepted: 2 March 2020 / Published: 4 March 2020
(This article belongs to the Special Issue Energy Storage System: Integration, Power Quality, and Operation)
In a microgrid, grid-connected inverters, as the interface between the distributed power supply and grid, cannot provide inertia support for the system. The control strategy of virtual synchronous generator (VSG) based on grid-connected inverters can enhance the stability of system frequency. In order to make the frequency response that has a smaller overshoot and a shorter settling time, a self-adaptive damping control strategy based on the relationship between the damping and the maximum frequency deviation for microgrid VSG is presented. The small-signal mathematical model of VSG is established, and the range of the damping coefficient is determined. Finally, simulation experiments are carried out with MATLAB/Simulink, and the effectiveness of the proposed control strategy is verified by comparing it with various damping control methods. View Full-Text
Keywords: virtual synchronous generator; frequency stability; self-adaptive control; damping virtual synchronous generator; frequency stability; self-adaptive control; damping
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Li, T.; Wen, B.; Wang, H. A Self-Adaptive Damping Control Strategy of Virtual Synchronous Generator to Improve Frequency Stability. Processes 2020, 8, 291.

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