GIL故障定位声传播特性分析  

On the Acoustic Propagation Characteristics of GIL for Fault Location

作　　者：张兆闯 肖江滔[1] 屈文锋 杨涛[2] 张勋 冉帅 翁利听 ZHANG Zhaochuang;XIAO Jiangtao;QU Wenfeng;YANG Tao;ZHANG Xun;RAN Shuai;WENG Liting(Xiluodu Hydropower Plant,China Yangtze Power Co.,Ltd.,Zhaotong 657300,China;Wuhan NARI Co.,Ltd.,State Grid Electric Power Research Institute,Wuhan 430000,China)

机构地区：[1]中国长江电力股份有限公司溪洛渡水力发电厂,云南昭通657300 [2]国网电力科学研究院武汉南瑞有限公司,湖北武汉430000

出　　处：《水电与新能源》2024年第11期41-44,48,共5页Hydropower and New Energy

摘　　要：气体绝缘金属封闭输电线路(gas-insulated transmission line,GIL)典型结构的声波传播特性与直管单元存在显著差异,影响整个区段的故障定位结果。通过构建含有典型结构的GIL三维仿真模型,采用数值模拟方法对声波在GIL上的传播特性进行分析,获得了声波经过GIL伸缩节及气隔单元的时延规律。研究结果表明,以直管单元作为参考对象,GIL的单伸缩节单元、双伸缩节单元以及气隔单元分别会使声波产生0.6、1 ms以及0.04 ms的时延。The acoustic propagation characteristics of typical structures of the gas-insulated transmission line(GIL)are significantly different from those of the straight pipe units,which affects the fault location of the entire section.Thus,three-dimensional simulation models of the typical GIL structures are constructed.Numerical simulations are carried out to analyze the acoustic propagation characteristics of GIL.The time delays of the acoustic wave passing through the GIL expansion joints and the air separation units are obtained.The results show that taking the straight pipe unit as a reference object,the expansion joint unit,the double expansion joint unit,and the air separation unit will produce 0.6,1 ms and 0.04 ms acoustic propagation time delays respectively.

关 键 词：GIL 声波 数值模拟 定位 伸缩节 

分 类 号：TM726[电气工程—电力系统及自动化]