Location of Asymmetric Ground Fault Using Virtual Injected Current Ratio and Two-stage Recovery Strategy in Distribution Networks

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外文摘要：Sparse measurements challenge fault location in distribution networks.This paper proposes a method for asym-metric ground fault location in distribution networks with limited measurements.A virtual injected current vector is formulated to estimate the fault line,which can be reconstructed from voltage sags measured at a few buses using compressive sensing(CS).The relationship between the virtual injected current ratio(VICR)and fault position is deduced from circuit analysis to pinpoint the fault.Furthermore,a two-stage recovery strategy is proposed for improving reconstruction accuracy of the current vector,where two different sensing matrixes are utilized to improve the incoherence.The proposed method is validated in IEEE 34 node test feeder.Simulation results show asymmetric ground fault type,resistance,fault position and access of distributed generators(DGs)do not significantly influence performance of our method.In addition,it works effectively under various scenarios of noisy measurement and line parameter error.Validations on 134 node test feeders prove the proposed method is also suitable for systems with more complex structure.

外文关键词：

Distribution networksfault locationreconstruction accuracytwo-stage recoveryvirtual injected current ratio

作者：

Haiting Shan、Luliang Zhang、Q.H.Wu、Mengshi Li

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作者单位：

School of Electric Power Engineering,South China University of Technology(SCUT),Guangzhou 510641,China

基金：

Key-Area Research and Development Program of Guangdong ProvinceState Key Program of National Natural Science Foundation of ChinaNatural Science Foundation of Guangdong Province

项目编号：

2020B010166004U18662102022A1515011587

出版年：

2024

DOI：

10.17775/CSEEJPES.2021.07900

中国电机工程学会电力与能源系统学报(英文版)

中国电机工程学会

中国电机工程学会电力与能源系统学报(英文版)

CSTPCDEI

ISSN：2096-0042

年,卷(期)：2024.10(1)

参考文献量40