吉牛电站主变铁芯多点接地故障仿真分析  

Simulation Analysis on Iron Core Multi Grounding Fault of Main Transformers in Jiniu Hydropower Station

作　　者：白维 BAI Wei(Guoneng Dadu River Geshiza Hydropower Development Co., LTD, Danba, Sichuan, 626302)

机构地区：[1]国能大渡河革什扎水电开发有限公司,四川丹巴626302

出　　处：《四川水力发电》2021年第2期118-122,共5页Sichuan Hydropower

摘　　要：针对变压器铁芯多点接地故障发生率高、不易发现,变压器接地危害性大,接地试验操作难度大的特性,在Maxwell电磁仿真软件中搭建了吉牛电站三相主变的3D涡流场模型,基于3D涡流场理论,对吉牛电站主变进行了铁芯多点接地故障仿真实验,仿真结果显示了吉牛电站主变铁芯多点接地故障电流特点及其发展规律,从而为铁芯多点接地故障预测与定位和绝缘优化提供依据。Iron core multi grounding fault of main transformers are of high occurrence rate.Grounding faults are harmless,difficult to be detected and grounding test is not easy to be carried out.The author establishes,in the Maxwell electromagnetic simulation software,3D current field model of three-phase main transformers in Jiniu hydropower station.Based on the 3D current field theory,simulation experiment on iron core multi-grounding fault is conducted,and the simulation demonstrates the current characteristics and development trend of iron core multi-grounding fault which provides basis for fault prediction,positioning and insulating optimization.

关 键 词：三相变压器 铁芯多点接地 仿真分析 实验结果 

分 类 号：TM622[电气工程—电力系统及自动化] U224.22[交通运输工程—道路与铁道工程]