换流站接地极电流对直流偏磁影响的分析及抑制  

Impact on Direct Current Bias Magnetic by Grounding Electrode Current in Convertor Station and Restriction Measure

作　　者：严以臻 曹良[1] 陶旭强 简淦杨[2] 刘明波[2] 

机构地区：[1]江苏省电力公司常州供电公司,江苏常州213003 [2]华南理工大学电力学院,广东广州510640

出　　处：《广东电力》2014年第9期37-41,48,共6页Guangdong Electric Power

摘　　要：为分析±500 kV政平换流站直流接地极对江苏省常州电网的影响,首先分析直流电流对不同类型变压器的影响程度以及对接地网加速腐蚀的影响程度,根据仿真分析以及变电站的历史实测数据,进行了政平换流站对江苏省500 kV和220 kV变电站中性点接地的运行变压器的影响分析,结合常州南部电网规划,提出抑制村前变电站直流影响的措施,并给出目前变电站应对直流偏磁问题的建议。In order to analyze impact on Jiangsu Changzhou power grid by direct current grounding electrode in ±500 kV Zhengping convertor station,impact degrees on different typed transformers and speeding up erosion of grounding grid by direct current were analyzed firstly. According to simulation analysis and historical measuring data in the substation,impact analysis on neutral point grounding running transformers in Jiangsu 500 kV and 220 kV substation by Zhengping convertor station was carried out. Combining south part power grid programming in Changzhou,measures to restrict impact of direct current in Cunqian substation were proposed and suggestions on direct current bias magnetic in present substation were pro-posed.

关 键 词：高压直流 接地极 变压器中性点 直流偏磁 抑制措施 

分 类 号：TM712[电气工程—电力系统及自动化]