共用接地极运行对周围变压器偏磁影响研究  

Study on the Impact of DC Bias Magnetic of the Power Transformers by Common Grounding Electrode Under Operation Condition

作　　者：刘从法 刘翰柱 肖应华 蔡文杰[2] 魏德军 LIU Congfa;LIU Hanzhu;Xiao Yinghua;Cai Wenjie;WEI Dejun(Southwest Electric Power Design Institute Co.Ltd.of China Power Engineering Consulting Group,Chengdu 610056,China;Kunming Bureau of EHV Transmission Company of China Southern Power Grid Co.,Ltd.,Kunming 650200,China)

机构地区：[1]中国电力工程顾问集团西南电力设计院有限公司,四川成都610056 [2]中国南方电网有限公司超高压输电公司昆明局,云南昆明650200

出　　处：《电力勘测设计》2022年第7期36-41,60,共7页Electric Power Survey & Design

摘　　要：本文以±800 kV乌东德直流工程昆北换流站和±500 kV云贵互联工程禄劝换流站的共用接地极与周边的±800 kV云广直流工程楚雄换流站接地极同时运行为例,建立仿真模型进行直流偏磁影响研究。同时,结合变压器直流偏磁的耐受电流值以及直流偏磁评估标准,提出相应的变压器直流偏磁治理方案。This paper studies the influence of DC bias on transformer and substation grounding grid around the common grounding electrode of±800 kV Wudongde DC project Kunbei converter station and±500 kV Yungui interconnection project Luquan converter station,and the grounding electrode of the±800 kV Yunguang DC project Chuxiong converter station is running.the DC bias current distribution of transformer in the surrounding AC power grid is analyzed,and establish the corresponding simulation model.At the same time,combined with the withstand current limit of transformer DC bias and the evaluation standard of DC bias,the corresponding DC bias control scheme are proposed.

关 键 词：共用接地极 变压器 直流偏磁 

分 类 号：TM42[电气工程—电器]