基于小波变换技术的混合电流电压行波测距系统在750kV输电工程中的应用

介绍了一种应用于750kV输电线路的新型测距系统。该系统以电流电压混合行波为电气量,以小波变换技术为分析工具,实现了精度小于500m的故障测距,弥补了对终端线路单纯采用电流行波测距的不足。该系统通过了现场瞬时接地短路试验的检验,现已在现场正式投运。

Application of Fault Range Finding System with Mixed Travelling Wave of Current and Voltage Based on Wavelet Transformation Technology in 750 kV Power Transmission Project

A kind of new fault range finding system applied in 750 kV transmission line was introduced. This system, taken mixed travelling wave of current and voltage as electrical quantity and wavelet transformation technology as analysis tool, realized the precision of range finding to be smaller than the fault range finding of 500 m, and remedied the deficit of range finding adopted current travelling wave for terminal line. This system has passed through the inspection of the instant grounding short circuit test on site, and already put into service.