换流变压器夹件接地电流偏大计算与分析  

Calculation and Analysis of Converter Transformer Grounding Current Mechanism

作　　者：张冠军[1] 田丰[1] 刘力强[1,2] 杜振斌 周秀 ZHANG Guan-jun;TIAN Feng;LIU Li-qiang;DU Zhen-bin;ZHOU Xiu(Baoding Tianwei Baobian Electric Co.,Ltd.,Baoding 071056,China;Hebei Industrial Technology Institute of Power Transmission and Transformation,Baoding 071056,China;Power Research Institute of State Grid Ningxia Power Co.,Ltd.,Yinchuan 750011,China)

机构地区：[1]保定天威保变电气股份有限公司,河北保定071056 [2]河北省输变电产业技术研究院,河北保定071056 [3]国网宁夏电力有限公司电力科学研究院,宁夏银川750011

出　　处：《变压器》2023年第12期12-17,共6页Transformer

摘　　要：换流变正常运行时普遍存在铁心系统接地电流过大现象,本文笔者分析了不同结构换流变铁心系统接地电流来源机理,采用能量法对一台换流变夹件接地电流进行计算,并基于计算过程提出一种换流变夹件接地电流快速计算方法。结合系统谐波频谱,将接地电流计算值与实测值进行对比,发现两者基波分量非常接近,高次谐波分量则有较大差异,最后分析差异原因并提出两点建议。Converter transformer grounding current is higher than power transformer.The source of different structural converter transformer grounding current was analysed.Electrical energy method was used to calculate the grounding current and a quick calculation formula was proposed.Contrast calculated value and the measured value,fundamental wave value are very close.Difference between system and measured harmonic spectrum was analysed.

关 键 词：换流变压器 接地电流 电场能量法 

分 类 号：TM721.1[电气工程—电力系统及自动化] TM41