Location of Single Phase to Ground Faults in Distribution Networks Based on Synchronous Transients Energy Analysis

作     者：Wang, Xuewen Zhang, Hengxu Shi, Fang Wu, Qiuwei Terzija, Vladimir Xie, Wei Fang, Chen 

作者机构：Shandong Univ Minist Educ Key Lab Power Syst Intelligent Dispatch & Control Jinan 250061 Peoples R China Tech Univ Denmark Dept Elect Engn DK-2800 Lyngby Denmark Shandong Univ Sch Elect Engn Jinan 250061 Peoples R China Univ Manchester Sch Elect & Elect Engn Manchester M13 9P Lancs England Shandong Univ Sch Elect Engn Jinan 250061 Peoples R China State Grid Shanghai Municipal Elect Power Co Elect Power Res Inst Shanghai 200437 Peoples R China 

出 版 物：《IEEE TRANSACTIONS ON SMART GRID》 (IEEE Trans. Smart Grid)

年 卷 期：2020年第11卷第1期

页      面：774-785页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 

基　　金：National Key Research and Development Program of China [2017YFB0902800] Science and Technology Project of State Grid Corporation of China [52094017003D] EPSRC [EP/I031707/1, EP/K036173/1] Funding Source: UKRI 

主　　题：Active distribution networks fault location neutral non-effectively grounded system single phase to ground faults transient zero-sequence current 

摘      要：As a result of small fault current, high level of noise and a large penetration of distributed generators (DG), in the neutral non-effectively grounded medium-voltage (MV) distribution networks, it is quite difficult to locate the faulted line section for single phase to ground faults. In this paper, using a technique based on synchronized measurements in distribution networks, a fault location method based on the analysis of the energy of the transient zero-sequence current in the selected frequency band (SFB) is proposed. The equivalent impedance of the distribution network with lateral branches is studied with an equivalent network, and the phase-frequency characteristics of the equivalent impedance are analyzed. The SFB, within which the transient energy of the faulty line section is larger than that of the healthy line sections is determined. A combined fault-section location criterion is proposed and the implementation scheme is illustrated with the distribution level phasor measurement units. Numerical simulations of the IEEE 34 node system and the field experiments of a 10kV distribution network validate the feasibility and effectiveness of the proposed method.