Field experiment using transient energy method to locate a single-phase to ground fault

Global Energy Interconnection

Chen Fang¹  Xiaodong Xing²  Fang Shi²  Baicong Sun²  Xuewen Wang³  Hengxu Zhang⁴  Wei Xie⁵ 

[1] Key Laboratory of Power System Intelligent Dispatch and Control (Ministry of Education), Shandong University, No. 17923 Jingshi Road, Jinan 250061, P.R. China;Key Laboratory of Power System Intelligent Dispatch and Control (Ministry of Education), Shandong University, No. 17923 Jingshi Road, Jinan 250061, P.R. China;State Grid Chongqing Electric Power Research Institute, No. 80 Huangshan Road, Chongqing 401123, P.R. China;State Grid Shanghai Electric Power Research Institute, No. 171 Handan Road, Shanghai 200233, P.R. China;State Grid Shanghai Municipal Electric Power Company, No. 1122 Yuanshen Road, Shanghai, 200122, P.R. China;

关键词: Single-phase-to-ground fault;    Fault location;    Neutral inefficiently grounding systems;    Distribution network;    Distribution-level PMU;    Transient energy;   

DOI  :  

来源: DOAJ

【 摘 要 】

Distribution networks in China and several other countries are predominantly neutral inefficiently grounding systems (NIGSs), and more than 80% of the faults in distribution networks are single-phase-to-ground (SPG) faults. Because of the weak fault current and imperfect monitoring equipment configurations, methods used to determine the faulty line sections with SPG faults in NIGSs are ineffective. The development and application of distribution-level phasor measurement units (PMUs) provide further comprehensive fault information for fault diagnosis in a distribution network. When an SPG fault occurs, the transient energy of the faulted line section tends to be higher than the sum of the transient energies of other line sections. In this regard, transient energy-based fault location algorithms appear to be a promising resolution. In this study, a field test plan was designed and implemented for a 10 kV distribution network. The test results demonstrate the effectiveness of the transient energy-based SPG location method in practical distribution networks.

【 授权许可】

Unknown