摘要
变压器空载合闸过程中容易产生励磁涌流,对变压器和电网中其他设备正常运行都具有很大威胁。文中首先对变压器励磁涌流产生的原理进行了分析,推导了单相变压器励磁涌流的近似表达式,并介绍了改进Jiles-Atherton(J-A)磁滞模型的理论以及使用J-A模型计算励磁涌流的方法。随后,基于PSCAD仿真软件,使用改进J-A模型,对预先消磁、合闸电阻、选相合闸3种变压器励磁涌流抑制措施进行了仿真,并分析了方法的效果及适用情形,为抑制变压器励磁涌流时方法的选择提供了参考。
It is easy to generate magnetizing inrush current during the no-load closing process of transformers,which poses a great threat to the transformer and other equipment in the power grid.In this paper,the principle of magnetizing inrush current is analyzed and the approximate expression of single-phase transformer excitation inrush current is derived.The theory of improved Jiles-Atherton(J-A)hysteresis model and the method of calculating magnetizing inrush current using J-A model are introduced.Then,based on the PSCAD simulation software,the improved J-A hysteresis model is used to simulate the effect of pre-demagnetization,closing resistance and phase-selection closing strategy onmagnetizing inrush current,and theapplicable situations of the methods are analyzed to provide references for the selection of methods.
作者
王伟
魏菊芳
方琼
刘力卿
何思名
关永刚
邹军
WANG Wei;WEI Jufang;FANG Qiong;LIU Liqing;HE Siming;GUAN Yonggang;ZOU Jun(State Grid Tianjin Electric Power Company Electric Power Research Institute,Tianjin 300384,China;Equipment Management Department of State Grid Tianjin Electric Power Company,Tianjin 300010,China;Department of Electrical Engineering,Tsinghua University,Beijing 100084,China)
出处
《高压电器》
CAS
CSCD
北大核心
2020年第2期101-107,共7页
High Voltage Apparatus
关键词
励磁涌流
J-A模型
预先消磁
合闸电阻
选相合闸
magnetizing inrush current
J-A model
pre-demagnetization
closing resistance
phase-selection closing strategy
