负荷电流对终端变电站相间故障的影响  

The Influence of Load Current on the Phase-to-Phase Fault of Terminal Substation

作　　者：马娟 房雪雷 吴义纯 MA Juan;FANG Xuelei;WU Yichun(Training Center of State Grid Anhui Electric Power Co.,Ltd.,Hefei 230022,China)

机构地区：[1]国网安徽省电力有限公司培训中心,安徽合肥230022

出　　处：《安徽电气工程职业技术学院学报》2020年第3期92-97,共6页Journal of Anhui Electrical Engineering Professional Technique College

摘　　要：输电线路故障在电力系统各类故障中占比最大,而负荷电流在系统输电线路故障时,为了便于分析,常被忽略。本文以终端变电站馈供线相间金属性故障为例,针对现场典型220 kV线路保护配置,利用实训室暂态动模仿真平台进行进行实验,在联络线和终端馈供不同运行方式、不同保护配置下,研究分析负荷侧不同相别的电流及序分量关系。实验结论有利于现场运维人员更深层次的理解负荷电流对保护动作的影响、看懂保护动作行为和故障录波图,在实际工作中起到实质性的指导作用。Transmission line faults take the largest part in the power system faults,while load current is often neglected to facilitate analysis when the transmission line is out of order.Based on the terminal substationfor feeder line,this paper takes a typical 220 kV line protection configuration as an example and conducts an experiment of the phase-to-phase metal fault on the transient dynamic simulation platform in the training room.It studies the relationship between current and sequence components on the load side with different operation modes and different protection configurations.The results are helpful for operators to gain a deeper understanding of the load current and the fault record,which can play a substantial guiding role in practical work.

关 键 词：负荷电流 终端变电站 相间金属性故障 录波图 

分 类 号：TM743[电气工程—电力系统及自动化]