Current polarity comparison based fault location for active distribution network
DOI：10.7667/PSPC171460
Key Words:active distribution network  fault location  current polarity comparison  feeder terminal unit
Author NameAffiliationE-mail
PANG Qingle School of Information and Control Engineering, Qingdao University of Technology, Qingdao 266520, China
School of Information and Electronic Engineering, Shandong Institute of Business and Technology, Yantai 264005, China 		 
LIU Yuchao School of Information and Electronic Engineering, Shandong Institute of Business and Technology, Yantai 264005, China  
LI Xinian School of Information and Electronic Engineering, Shandong Institute of Business and Technology, Yantai 264005, China lixinian@163.com 
SUN Jing School of Information and Electronic Engineering, Shandong Institute of Business and Technology, Yantai 264005, China  
WANG Shenlong School of Information and Electronic Engineering, Shandong Institute of Business and Technology, Yantai 264005, China  
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Abstract:The feeder terminal unit controls the distribution network actively when a fault occurs in the active distribution network, it requires a simple and effective control algorithm. So a fault location method based on current polarity comparison for active distribution network is proposed. In this method, the feeder terminal unit detects fault currents in real time, the abrupt change moment is taken as the fault starting moment. The fault current of half cycle is stored from the fault starting moment and its polarity value is calculated. Fault location is realized by comparing the fault current polarity of adjacent detection points. Simulation and field verification results show that the proposed method can achieve accurate fault location under phase-to-phase short-circuit faults and single-phase-to-ground faults in active distribution network. This work is supported by National Natural Science Foundation of China (No. 61472227 and No. 61403236), Science and Technology Development Plan of Shandong Provincial Education Department (No. J15LN10), and Yantai Science and Technology Plan (No. 2016ZH055).
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