10kV配电线路雷电感应过电压在线监测装置及其应用  

On⁃line Monitoring Device for Lightning Induced Over⁃voltage of 10 kV Distribution Line and Its Application

作　　者：徐文华 和文龙 陈继忠 高凌志 陈树明 张铭艳 杨庆[2] 张新东 XU Wenhua;HE Wenlong;CHEN Jizhong;GAO Lingzhi;CHEN Shuming;ZHANG Mingyan;YANG Qing;ZHANG Xindong(Huaping Power Supply Bereau of Yunnan Power Grid,Yunnan Lijiang 674800,China;State Key Laboratory of Power Transmission Equipment&System Security and New Technology,Chongqing University,Chongqing 400044,China)

机构地区：[1]云南电网有限责任公司丽江华坪供电局,云南丽江674800 [2]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400044

出　　处：《高压电器》2023年第4期77-83,共7页High Voltage Apparatus

基　　金：南方电网公司科技项目(H20200373)。

摘　　要：雷电感应过电压是引起配电网故障的主要因素之一。为收集配电线路上的感应雷过电压数据,研究其波形特性,以期用于指导架空配电线路的雷电防护,文中采用了一个自供电、无线传输的雷电过电压在线监测装置,接触测量了配电线路中雷电感应过电压信号。通过对某10 kV配电线路上雷电感应过电压波形进行观测,并根据波形特征获取过电压相关波形参数。结果显示,感应雷过电压主要以高频分量形式叠加至工频相电压,所观察到的感应雷过电压波表现为波头时间短、波尾出现双极性高频振荡,最终衰减到零的特点,并就耦合地线耦合感应降低线上感应过电压幅值情况进行讨论。Lightning⁃induced over⁃voltage(LIOV)is one of the main factors causing fault of distribution network.For collecting the lightning induced over⁃voltage data on the distribution line,studying its waveform characteristic with purpose of instructing lightning protection of overhead line,a kind of lightning over⁃voltage on⁃line monitoring device with self power supply and wireless transmission is adopted in this paper,and the lightning induced over⁃volt⁃age signal of the distribution line is contacted and measured.The waveform parameters related to the over⁃voltage is obtained through observation of the lightning induced over⁃voltage of one 10 kV distribution line and also in accor⁃dance with the waveform characteristic.The results show that the lightning induced voltage is mainly in the form of high frequency component which is superimposed to power frequency phase voltage.The observed lightning induced over⁃voltage waveform shows the characteristic of a very short wave head and bipolar high⁃frequency oscillation at the wave tail,and finally decays to zero.Moreover,the situation of coupling ground wire coupling induction to reduce the amplitude of the induced over⁃voltage on the line is discussed.

关 键 词：配电线路 线路过电压在线监测装置 感应雷过电压 耦合地线 

分 类 号：TM863[电气工程—高电压与绝缘技术]