【标题】 ±800kV天-中直流输电工程对甘肃酒泉地区电网750kV变压器直流偏磁的影响及治理措施

【Title】Analysis and handing Measures of 750kV Transformer DC Magnetic Bias in Jiuquan power network based on±800 kV TIAN-ZHONG UHVDC Transmission Project

【摘要】直流输电工程在单极大地回线或双极不平衡方式运行时，由于在大地回路中电流的存在，会引起附近变压器产生直流偏磁现象。本文应用基于场路耦合模型的直流分布计算软件，计算了天中直流单极不平衡运行方式下甘肃酒泉地区电网各750kV变电站变压器中性点直流电流分布情况，并对各站计算值与实测值进行了比对。选择存在较大直流偏磁电流的750kV沙洲变电站主变压器，通过相关参数计算和选择，提出了隔离变压器中性点直流偏磁电流的措施。本文提出的直流偏磁治理方案对750kV变压器的偏磁治理具有一定的借鉴意义。

【Abstract】When the DC project is operated in the single polar loop or bipolar unbalanced mode, Transformer will produce DC bias magnetic phenomenon because of the presence of the DC current in the earth-line-transformer current loop. In this paper, based on the field circuit coupled model of the DC distribution Computational model, the distribution of DC current of the transformer in the 750kV substation of Jiuquan area is calculated. Choose the transformer that existence of large DC bias currents of magnetic about 750kV SHAZAHOYU substation, the handing measures for the isolation of DC bias current are proposed by the parameters calculating and selecting. The current of DC Magnetic Bias handing measures of 750kV transformer has certain reference significance. 

【关键词】直流偏磁；交流电网直流电流分布；酒泉电网；隔直措施

【Keywords】DC magnetic bias; 750kV transformer; Jiuquan grid ; Direct isolation measures

【作者】

胡春江	：国网甘肃电力公司电力科学研究院，甘肃兰州，730050；
张忠元	：国网甘肃省电力公司，甘肃兰州，730000；
温定筠	：国网甘肃电力公司电力科学研究院，甘肃兰州，730050；
刘康	：国网甘肃电力公司电力科学研究院，甘肃兰州，730050；
孙亚明	：国网甘肃电力公司电力科学研究院，甘肃兰州，730050；

【Author】

HU Chunjiang	: Electric Power Research Institute of Gansu Power Grid Corporation, Lanzhou 730050, China;
ZHANG Zhongyuan	: State Grid Gansu Electric Power Company,Lanzhou 730030,China；
Wen Dingjun	: Electric Power Research Institute of Gansu Power Grid Corporation, Lanzhou 730050, China;
Liu Kang	: Electric Power Research Institute of Gansu Power Grid Corporation, Lanzhou 730050, China;
Sun Yaming	: Electric Power Research Institute of Gansu Power Grid Corporation, Lanzhou 730050, China;

【来源】2016年中国电机工程学会年会论文集

【出版时间】Tue Nov 15 00:00:00 CST 2016