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.
作者
张冠军
田丰
刘力强
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)
出处
《变压器》
2023年第12期12-17,共6页
Transformer
关键词
换流变压器
接地电流
电场能量法
Converter transformer
Grounding current
Electrical energy method