The Integrated Switching Control Strategy for Grid-Connected and Islanding Operation of Micro-Grid Inverters Based on a Virtual Synchronous Generator

Kai Shi, Guanglei Zhou, Peifeng Xu, Haihan Ye and Fei Tan
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Kai Shi: School of Electrical and Information Engineering, Jiangsu University, Zhenjiang 212000, China
Guanglei Zhou: School of Electrical and Information Engineering, Jiangsu University, Zhenjiang 212000, China
Peifeng Xu: School of Electrical and Information Engineering, Jiangsu University, Zhenjiang 212000, China
Haihan Ye: School of Electrical and Information Engineering, Jiangsu University, Zhenjiang 212000, China
Fei Tan: School of Electrical and Information Engineering, Jiangsu University, Zhenjiang 212000, China

Energies, 2018, vol. 11, issue 6, 1-20

Abstract: In allusion to the virtual synchronous generator (VSG)-based voltage source inverters in micro-grids, an integrated control method combining a quasi-synchronization algorithm and an islanding detection algorithm is proposed to improve the power supply reliability and quality, which can simultaneously meet the operational requirements of both grid-connected mode (GCM) and off-grid mode (OGM), and the smooth switching between them. The quasi-synchronization algorithm of the micro-grid inverter is designed to realize a flexible grid connection. Moreover, for quickly detecting islanding phenomena, a novel islanding detection algorithm based on the VSG’s inherent characteristics is put forward. Finally, the validity and availability of the proposed models and control strategies are comprehensively verified by simulation results based on Matlab/Simulink.

Keywords: micro-grid inverter; virtual synchronous generator; quasi-synchronization; islanding detection; smooth-switch control strategy (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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