合500kV空载主变压器产生的高频铁磁谐振过电压的分析

Analysis of High—Frequency Ferromagnetic—Resonance Overvoltage Occurring as Closing 500kV No—Load Tramsfomer

本文介绍了500kV空载主变时发生高频铁磁谐振过电压的情况,并对其产生的机理进行了分析。系统网络参数的配合与空载主变的合闸涌流是这种过电压产生的原因,合闸相位角的不同决定了过电压的幅值具有的随机性。

This article introduced the phenomena of high-frequency ferromagnetic-resonance overvoltage occurring as closing 500kV no—load transformer, and analyzed the mechanism such overvoltage is caused by match of system parameters and the surge current of no-load transformer as closing,The randomness of amplitude of overvoltage results from the defference of closing phase angle.