摘要
谐振过电压是引起电压互感器熔断器烧毁较典型的故障,在中性点不接地系统中,由于电磁式电压互感器铁芯电感元件饱和,使回路中的非线性的电感参数在满足一定的谐振条件时,产生铁磁谐振过电压。本文通过某电厂35kV母线电压互感器熔断器烧毁故障案例分析,找出了在中性点不接地系统中产生谐振过电压的主要原因,提出了几种改进方案,并通过对比分析,找出最为经济合理且有效治理手段,为解决谐振过电压引起电压互感器熔断器烧毁故障提供了一个方法。
The resonance over-voltage is the typical failure that causes potential transformer fuse and burn.in neutral ungrounded systems,often due to the formation of matching between electromagnetic voltage transformer＇s nonlinear excitation characteristics and the ground capacitance,magnetic resonance over-voltage will occur to a certain conditions.In this paper,through the case analysis of a power plant＇s 35kV bus voltage transformer fusebox burning failure,the main cause for resonance over-voltage in the Neutral ungrounded systems is identified.Several solutions are suggested,and by comparing and analysis the most economical and effective means of treatment is found to provide a solution for this problem.
出处
《神华科技》
2011年第3期69-71,共3页
Shenhua Science and Technology
关键词
电压互感器
熔断器
烧毁
处理
Potential transformer
Fusebox
Burnout
Treatment
