小电流系统电压异常分析

Analysis of Voltage Abnormalities in Small Current Systems

10kV配电网位于电力系统末端,线路较长、分支较多且运行环境复杂恶劣,发生接地故障概率较高。目前大多数末端站被纳入调控站,调控值班员主要通过母线电压异常来分析线路故障,但10kV线路故障类型较多,且都有可能触发小电流监察装置发出接地信号。着重就线路发生接地、断线等故障引起母线电压异常变化的情况进行分析。

10 kV distribution network is located at the end of the power system,with longer lines,more branches and complex and harsh operating environments,and the probability of ground faults is higher.At present,most of the end station is included in the control station,control watchman mainly through the bus voltage abnormality to analyse line faults,but the 10 kV line fault type is more,and are likely to trigger the small current monitoring device issued by the grounding signal.Focus on line grounding,disconnection and other faults caused by abnormal bus voltage changes are analysed.