标题：Methodology to Differentiate Type of Single-Phase Line Break Fault in 10kV Ungrounded Distribution Networks
作者：Shi, Fangfang; Cong, Wei
作者机构：[Shi, Fangfang; Cong, Wei] Shandong Univ, Sch Elect Engn, Minist Educ, Key Lab Power Syst Intelligent Dispatch & Control, Jinan, Peoples R China.
会议名称：IEEE PES Asia-Pacific Power and Energy Engineering Conference (IEEE PES APPEEC)
会议日期：DEC 07-10, 2014
来源：2014 IEEE PES ASIA-PACIFIC POWER AND ENERGY ENGINEERING CONFERENCE (IEEE PES APPEEC)
关键词：distribution network; phasor diagram; single-phase line break fault;; sequence network
摘要：10kV distribution network is always a neutral point ungrounded system. Single-phase line break and grounding fault frequently occurs in 10kV distribution networks, threats the safe and stable operation of power grid and damages people's lives and properties. A methodology to differentiate type of single-phase line break fault is proposed in this paper, which uses sequence network and symmetrical components method to analyze and summarize the voltage and current variation when various single-phase line break fault occurs, then draw the voltage phasor diagram and current phasor diagram. The voltage and current variation and phasor diagrams will provide criteria for the detection and identification of single-phase line break fault in ungrounded distribution networks. Simulation results show the accuracy of the theoretical analysis in this paper.