500kV变压器低压绕组外接管母出错时空载合闸电流分析  

Analysis of No-load Closing Current with External Tube Bus of Low-Voltage Winding of 500 kV Transformer Wrongly Connected

作　　者：田焱 TIAN Yan(Shaoguan Power Supply Bureau of Guangdong Power Grid Co.,Ltd.,Guangdong Shaoguan 512026,China)

机构地区：[1]广东电网有限责任公司韶关供电局,广东韶关512026

出　　处：《广西电力》2022年第4期87-90,96,共5页Guangxi Electric Power

摘　　要：本文利用Matlab语言的电力系统仿真模块,对500 kV变压器35 kV绕组外接管母出错时的空载合闸电流进行了仿真,仿真和实测结果表明,35 kV侧某相绕组外接35 kV管母出错时,对应的500 kV侧高压侧三相绕组空载合闸电流幅值一样;35 kV绕组外接35 kV管母正确两相绕组对应的500 kV侧高压侧两相绕组的空载合闸电流相位一致,35 kV绕组外接35 kV管母错误相绕组对应的500 kV侧高压侧绕组空载合闸电流方向与500 kV侧高压侧另外两相绕组的电流相位相反;500 kV侧高压侧三相绕组的空载合闸电流存在直流分量。In this paper, to the no-load closing current with external tube bus of the 35 kV winding of 500 kV transformer wrongly connected was simulated using power system simulation module of MATLAB. The simulation results and the actual measurement results show that the amplitude of the no-load closing current of the corresponding phase at the high voltage side of the 500 kV transformer is the same as the other two phases when one phase of external tube bus of the 35 kV winding wrongly connected. The phase of this no-load closing current of the corresponding phase at the high voltage side of the 500 kV transformer has opposite direction as compared with the other two phases, in which the phase directions are the same. DC components exist in the no-load closing currents of the three phase windings at the high voltage side of the 500 kV transformer.

关 键 词：变压器 三角形绕组 错误接线 电流 仿真 

分 类 号：TM743[电气工程—电力系统及自动化]