李金龙;李金忠;张书琦;

• 1:中国电力科学研究院有限公司
• 2:国家电网有限公司

摘要(Abstract)：

近年来,随着特高压线路建设及投运数目的增加高压直流输电系统引起的直流偏磁日趋严重,非常有必要对变压器进行直流偏磁耐受评估。而直流偏磁工况下变压器激磁电流计算是直流偏磁耐受评估的重要研究内容。因此,根据变压器的铁心结构、绕组布置、逆磁滞回模型利用磁路-电路对偶原理提出一种综合考虑其结构特征与铁心材料的非线性磁化特性的拓扑修正暂态模型用于变压器直流偏磁激磁电流的计算。数值计算结果与试验测量数据具有良好的一致性,验证了所提模型的有效性。分析解释了不同材料、铁心接缝气隙厚度和漏感参数对计算结果的影响。经验证,变压器铁心材料对直流偏磁激磁电流的影响较小,气隙厚度和漏感参数是影响计算结果的重要参数,需根据试验结果对初始估计值进行必要修正。所得结论可为变压器拓扑修正暂态模型在直流偏磁耐受评估中的应用提供必要参考。

关键词(KeyWords)： 变压器拓扑修正暂态模型;直流偏磁;磁滞模拟;电磁暂态

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 李金龙;李金忠;张书琦;

Email:

DOI: 10.13335/j.1000-3673.pst.2019.0190

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