不接地系统单相断线故障负序电流分析  

Negative Sequence Current Analysis of Single-phase Disconnection Fault in Ungrounded System

作　　者：唐钊 TANG Zhao(China Railway First Survey and Design Institute Group Co.,Ltd.,Xi′an 710043,China)

机构地区：[1]中铁第一勘察设计院集团有限公司,陕西西安710043

出　　处：《电工技术》2024年第9期68-70,共3页Electric Engineering

摘　　要：配电网架空线发生单相断线故障后,部分负荷电流缺失,易被忽视。通过建立配电网断线故障电磁暂态仿真模型,分析发生单相断线故障后线路电压电流变化特征,提出了一种基于负序电流的配电网单相断线故障分析方法。仿真结果表明,提出的单相断线故障分析特征量具有良好的可靠性和灵敏度。It is easily ignored that part of load current will be lost after an overhead line of distribution network encounters a single-phase disconnection fault.By establishing an electromagnetic transient simulation model for distribution network disconnection faults and analyzing the characteristics of line voltage and current changes after the occurrence of single-phase disconnection faults,a new method for analyzing single-phase disconnection faults in distribution networks based on negative sequence current is proposed.The simulation results show that the adoption of the proposed method in analyzing feature quantities for single-phase broken line fault can achieve good reliability and sensitivity.

关 键 词：配电网 单相断线故障 负序电流 

分 类 号：TM756[电气工程—电力系统及自动化]