输电线路雷电过电压识别方法研究  

The Study of Lightning Overvoltage Identification Method for Transmission Lines

作　　者：饶超平 

机构地区：[1]中国葛洲坝集团股份有限公司勘测设计院,湖北武汉430000

出　　处：《通信电源技术》2017年第3期88-89,共2页Telecom Power Technology

摘　　要：雷电击穿是造成输电线路故障的主要原因,雷电保护是保证电力线路安全运行的关键措施。如果可以在线提取雷电的过电压波形,不仅能够迅速排除故障点,缩短检修时间,恢复供电,同时还能对雷击故障定位采取防雷保护措施,提高供电可靠性。因此,雷电过电压的故障识别对电力系统安全运行具有重要意义。文中建立输电线路电磁暂态仿真模型,对雷电过电压信号进行了建模,利用小波变换提取电压特征量进行分析。The lightning strike is the main cause of transmission line failure,and lightning protection is the key measure to ensure the safe operation of power line.If we can extract the waveform of lightning overvoltage online,then we can not only quickly ruled out fault point,shorten maintenance time,restore power,as well as the lightning fault location lightning protection measures,improve power supply reliability.Therefore,the fault identification of lightning overvoltage is of great significance to the safe operation of the power system.In this paper,the electromagnetic transient simulation model of transmission line is established,the signal of lightning overvoltage is modeled,and the voltage characteristic quantity is analyzed using wavelet transform.

关 键 词：过电压识别 暂态线路仿真 小波变换 

分 类 号：TM863[电气工程—高电压与绝缘技术]