大容量变压器励磁涌流及其抑制方法

Analysis of large-capacity transformer magnetizing inrush current and comparative study of suppression methods

本文首先分析变压器空载合闸产生励磁涌流的原因,以及励磁涌流对电力系统造成的危害。为了有效降低变压器在空载合闸瞬间产生的励磁涌流,提高电力系统运行的可靠性,本文通过研究在变压器一次侧串电阻、并联变压器两种预充磁技术,并进行了对比仿真分析,结果表明预充磁变压器相更为有效的抑制励磁涌流。

This article first analyzes the reasons for the magnetizing inrush current caused by the no-load closing of the transformer,and the harm caused by the magnetizing inrush current to the power system.In order to reduce inrush current of the transformer at the moment of no-load closing,and improve the reliability of power system operation,this paper adopts simulation technology to analyze two kinds of pre-magnetization technology:resistor in series on the side of transformer and transformer in parallel,the results show that the pre-charged transformer can be more effective in suppressing the inrush current.