基于避雷器尾端电流监测的电力系统过电压反演

Overvoltage Inversion of Power System Based on Tail-endCurrent Monitoring of Lightning Arrester

避雷器是电力系统进行过电压防治的主要设备,现有避雷器监测装置可以实现电流电压的实时监测,但缺少进一步的数据分析功能,且大多数在线监测设备使用电压互感器在线监测过电压,对一次设备性能存在一定影响。文中设计了一种基于避雷器尾端电流监测来进行过电压分析的装置,该装置利用电流互感器进行宽频尾端电流采集,并利用所设计的内置高频采样芯片及智能程序的现地边缘计算单元对采集结果进行首端电压的智能反演,实现对过电压过程的数据分析,为过电压防治提供依据。

Lightning arrester is the main equipment for overvoltage prevention and control in power systems.The existing monitoring devices for lightning arrester can realize real-time monitoring of current and voltage,but lack further data analysis functions,and most online monitoring devices use voltage transformers to monitor overvoltage online,which has a certain impact on the performance of primary equipment.A device for overvoltage analysis based on current monitoring at tail end of lightning arrester is designed.It uses the current transformer to collect the current at the end of broadband and designs a local edge computing unit with a built-in high-frequency sampling chip and an intelligent program.And the unit realizes the intelligent inversion of the head-end voltage based on the tail-end current monitoring results and then realizes the data analysis of overvoltage process,which provides the basis for the overvoltage prevention and control.