基于故障电流波形相关性的35 kV线路故障区段识别系统

Fault Section Identification System for 35 kV Transmission Lines Based on Correlation of Fault Current Waveforms

针对35 kV线路拓扑复杂,传统输配电故障区段识别技术无法可靠应用的问题,研究了35 kV多分支混合线路接地故障暂态电流特征及故障时刻暂态电流波形相关性,并提出了区段识别判据。通过研制基于暂态电流波形相关性的35 kV多分支故障区段识别在线监测设备及区段识别主站系统,有效解决了35 kV多分支架空-电缆混合线的故障区段识别难题。该系统具有一定的工程实用价值、经济和社会效益。

In response to the complex topology of 35 kV transmission lines and the inability to reliably apply traditional fault section identification techniques,the transient current characteristics of ground faults in 35 kV multi branch hybrid transmission lines and the correlation of transient current waveforms at fault times were studied,and criteria for section identification were proposed.By developing correlation based on transient current waveforms,the online monitoring equipment for identifying 35 kV multi branch fault sections and the main station system for section identification can effectively solve the problem of identifying fault sections in 35 kV multi branch overhead cable hybrid lines.The system has certain engineering practical value,economic and social benefits.