Hybrid Control and Protection Scheme for Inverter Dominated Microgrids

Xu, Xiaotong, Wen, Huiqing, Jiang, Lin ORCID: 0000-0001-6531-2791 and Hu, Yihua (2017) Hybrid Control and Protection Scheme for Inverter Dominated Microgrids JOURNAL OF POWER ELECTRONICS, 17 (3). pp. 744-755. ISSN 1598-2092, 2093-4718

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Abstract

With the high penetration of various sustainable energy sources, the control and protection of Microgrids has become a challenging problem considering the inherent current limitation feature of inverter-based Distributed Generators (DGs) and the bidirectional power flow in Microgrids. In this paper, a hybrid control and protection scheme is proposed, which combines the traditional inverse-time overcurrent protection with the biased differential protection for different feeders with different kinds of loads. It naturally accommodates various control strategies such as P-Q control and V-f control. The parameter settings of the protection scheme are analyzed and calculated through a fast Fourier transform algorithm, and the stability of the control strategy is discussed by building a small signal model in MATLAB. Different operation modes such as the grid-connected mode, the islanding mode, and the transitions between these two modes are ensured. A Microgrid model is established in PSCAD and the analysis results show that a Microgrid system can be effectively protected against different faults such as the single phase to ground and the three phase faults in both the grid-connected and islanded operation modes.

Item Type:	Article
Uncontrolled Keywords:	Biased differential protection, Distributed generators, Grid-connected mode, Inverse-time overcurrent protection, Islanded mode, Microgrid protection
Depositing User:	Symplectic Admin
Date Deposited:	26 Jun 2017 09:27
Last Modified:	16 Jun 2026 04:16
DOI:	10.6113/JPE.2017.17.3.744
Related Websites:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3008127
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