配电网小电流接地系统单相故障定位分析

Analysis of Single-Phase Fault Location Technology for Small Current Grounding System in Distribution Network

配网自动化中最重要的一项功能就是单相接地故障时,配电网可以快速进行故障类型诊断,找出故障所在位置,并采取有效措施将故障区域隔离,尽快恢复电网运行。根据小电流接地故障定位步骤,采用阻抗法、注入信号寻迹法、零序电流瞬态能量法等实现小电流接地故障的快速定位,提高配电网故障诊断效率,保障配网供电质量,全方位推动配电网安全运行。

One of the most important functions in distribution automation is that when a single-phase grounding fault occurs,the distribution network can quickly diagnose the fault type,find out the fault location,and take effective measures to isolate the fault area,so as to restore the network operation as soon as possible.According to the positioning steps of low-current grounding fault,impedance method,injected signal tracing method and zero-sequence current transient energy method are adopted to realize the rapid positioning of low-current grounding fault,improve the fault diagnosis efficiency of distribution network,ensure the power supply quality of distribution network,and promote the safe operation of distribution network in all directions.