GIL闪络故障时接地线暂态电流特征分析  

Analysis of Transient Current Characteristics of Grounding Wire During GIL Flashover Fault

作　　者：薛庆刚 李洪全 李峰 王士君 卢佳南 张书源 吴超 XUE Qinggang;LI Hongquan;LI Feng;WANG Shijun;LU Jianan;ZHANG Shuyuan;WU Chao(Shandong Electric Group Xinneng Technology Co.,Ltd.,Shandong 250101,China.;China Electric Power Research Institute Co.,Ltd.,Beijing 100192,China.)

机构地区：[1]山东电工电气集团新能科技有限公司,山东250101 [2]中国电力科学研究院有限公司,北京100192

出　　处：《电子技术（上海）》2023年第5期319-321,共3页Electronic Technology

基　　金：山东省重点研发计划(重大科技创新工程)项目(2021CXGC010211)。

摘　　要：阐述以气体绝缘金属封闭输电线路GIL设计参数为基础,针对内部绝缘子、导杆等部件建立原件模型,并针对1500m长度,1000kV/6.3kA GIL构建整体暂态模型,分析了距离首端600m处发生闪络事故时接地线上电流信号暂态特性。结果表明,故障点两侧位置越远的接地线暂态电流开始时间也越滞后,距离故障点发生位置越近的接地线,暂态电流最大峰值也越大。Based on the GIL design parameters of gas insulated metal enclosed transmission line,this paper establishes the original model for the internal insulator,guide rod and other components,and constructs the overall transient model for the 1500m length,1000 kV/6.3 kA GIL,and analyzes the transient characteristics of the current signal on the grounding wire when a flashover accident occurs 600 m away from the head end.The results show that the starting time of the transient current of the grounding wire that is farther away from both sides of the fault point is also more delayed,and the maximum peak value of the transient current of the grounding wire that is closer to the fault point is also larger.

关 键 词：闪络故障 暂态特征 暂态模型 分相式 故障定位 电流互感器 

分 类 号：TM75[电气工程—电力系统及自动化]