林国松,张硕,权伟,李原

• 1:西南交通大学电气工程学院

摘要(Abstract)：

为研究涌流对牵引变电所距离保护的影响，本文对1次单线AT供电线路的分区所自耦变压器合闸导致牵引变电所距离保护误动作情况进行分析。根据本次误动线路搭建电路模型，理论分析励磁涌流及和应涌流产生的原因，并对故障前后的电压、电流波形进行阻抗与谐波分析，得出了牵引变电所距离保护误动作的原因。为了避免牵引变电所距离保护误动作再发生，提出采用3次谐波闭锁距离保护的改进方案，可有效避免因2次谐波闭锁失效导致的距离保护误动。基于Matlab/Simulink仿真验证了改进方案的可行性。

关键词(KeyWords)： 自耦变压器;3次谐波闭锁;综合谐波抑制;励磁涌流;和应涌流

Abstract:

Keywords:

基金项目(Foundation): 四川省自然科学基金资助项目（2022NSFSC0405）

作者(Author): 林国松,张硕,权伟,李原

DOI: 10.19635/j.cnki.csu-epsa.000963

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