Microgrid Relay Protection Scheme Based on Harmonic Footprint of Short-Circuit Fault

中国电气工程学报（英文） ›› 2018, Vol. 4 ›› Issue (4): 64-70.

出版日期:2018-12-25 发布日期:2019-10-31

Microgrid Relay Protection Scheme Based on Harmonic Footprint of Short-Circuit Fault

Wei Zhao, Xiaoxi Bi, Wubo Wang, Xiaofeng Sun^*

Key Lab of Power Electronics for Energy Conservation and Motor drive of Hebei province,College of Electrical Engineering, Yanshan University, Qinhuangdao 066004, China

Online:2018-12-25 Published:2019-10-31
Contact: *E-mail: sxf@ysu.edu.cn.
About author:Wei Zhao received the B.S. degree and the M.S. degree in electrical engineering and Power Electronics and Power Drives from Yanshan University, Qinhuangdao, China, in 2006 and 2009 where he is currently working toward the Ph.D. degree in power electronics. His current research interests include the stability analysis of microgrid and power quality. 70. Xiaoxi Bi received the B.S. degree in electrical engineering and automation in electrical engineering from the Yanshan University, Qinhuangdao, China in 2017,where she is currently working toward the M.S. degree. Her current research interests include the relay protection of microgrid and power quality. Wubo Wang received the B.S. degree in electrical engineering and automation in 2016. He is currently working toward the M.S. degree in electrical engineering and electrical transmission from the Yanshan University, Qinhuangdao, China. His current research interests include the relay protection of microgrid and power quality. Xiaofeng Sun (M’11) received the B.S. degree in electrical engineering from Northeast Heavy Machinery Institute in 1993, Heilongjiang, China, and the M.S. and Ph.D. degrees in power electronics from Yanshan University, Qinhuangdao, China in 1999 and 2005, respectively. From 2003 to 2007, he was an Associate Professor with Yanshan University, where since 2008 he has been a Professor and also the Director at the Key Laboratory of Power Electronics for Energy Conservation and Motor Drive of Hebei Province. He has authored or coauthored more than 70 transactions and conference papers. His current research interests include DC-DC converters, multiple-input converters, hybrid electric vehicles, microgrids, and power quality control.
Supported by:
Supported by National Key Research and Development Plan (2016YFB-0900300), National Nature Science Foundation of China (51677162) and Natural Scientific Foundation of Hebei Province (E2017203337).

摘要/Abstract

Abstract: Due to the low overcurrent capacity of the inverter-based microgrid, traditional overcurrent protect is not suitable for the entire power system including microgrid. A fast detecting method and a whole protection scheme is needed to identify the fault and keep the system stable. This paper proposes a microgrid relay protection scheme combining a fast fault detection algorithm and low voltage ride through(LVRT) strategy. The detection algorithm combines a new harmonic analysis method and impedance delay which can complete fault detection within several milliseconds. Under a fault condition, the LVRT strategy utilizes an enhanced phase-locked loop(EPLL) to allow the microgrid to operate under unbalanced conditions for a period of time. In addition, for the dispatch requirements of power system, it also has communication based power compensation functionality. The scheme given in this paper is verified by simulation, verifying feasibility of its application in practice.

Key words: Harmonic footprint, relay protection, fault detection, LVRT, microgrid

. [J]. 中国电气工程学报（英文）, 2018, 4(4): 64-70.

Wei Zhao, Xiaoxi Bi, Wubo Wang, Xiaofeng Sun. Microgrid Relay Protection Scheme Based on Harmonic Footprint of Short-Circuit Fault[J]. Chinese Journal of Electrical Engineering, 2018, 4(4): 64-70.

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Microgrid Relay Protection Scheme Based on Harmonic Footprint of Short-Circuit Fault

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