韩霄,陈浩天,周佳,陈卫,陈德树
HAN Xiao,CHEN Haotian,ZHOU Jia,CHEN Wei,CHEN Deshu

• 1:华中科技大学电气与电子工程学院
• 2:广东电网有限责任公司东莞供电局

摘要(Abstract)：

变压器空载合闸励磁涌流对电网运行产生诸多问题，以相控合闸为代表的涌流抑制技术可以消除其影响，而相控合闸实现的关键因素是变压器铁心剩磁的测量。为此，针对变压器分闸对铁心剩磁的影响问题展开研究。首先，基于变压器分闸回路，估算变压器分闸截流过电压，定性地研究其对铁心剩磁的影响；然后，结合J-A磁滞仿真，探究变压器铁心剩磁与分闸角的关系及分闸后铁心磁通的变化轨迹；最后，采用变压器剩磁定量测量，得出了变压器实际剩磁的演化规律，并对前述的理论分析及仿真探究结果进行了验证。
Magnetizing inrush current caused by transformer no-load switching can lead to various issues in power grid operations. Techniques such as phase-controlled switching are effective in mitigating these effects, with the key factor being the measurement of the transformer core's residual magnetism. This paper investigates the impact of transformer switching-off on core residual magnetism. First, based on the transformer switching-off circuit, the switching-off interruption overvoltage is estimated, and its qualitative impact on core residual magnetism is analyzed. Next, using J-A hysteresis simulation, the relationship between transformer core residual magnetism and switching-off angle, as well as the magnetic flux trajectory after switching-off, is explored. Finally, quantitative measurement of the transformer's residual magnetism is conducted, revealing the evolution patterns of actual residual magnetism. The theoretical analysis and simulation-based findings are validated.

关键词(KeyWords)： 变压器励磁涌流;剩磁;截流过电压;励磁涌流抑制;空载合闸
transformer magnetizing inrush current;residual magnetism;chopping overvoltage;magnetizing inrush current suppression;no-load closing

Abstract:

Keywords:

基金项目(Foundation): 南方电网公司科技项目（031900KC23070040）

作者(Author): 韩霄,陈浩天,周佳,陈卫,陈德树
HAN Xiao,CHEN Haotian,ZHOU Jia,CHEN Wei,CHEN Deshu

DOI: 10.19585/j.zjdl.202502010

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