摘要
在不直接接地系统中,冲击空母线时易发生铁磁谐振现象。分析了220 kV澄潭变电站35 kVⅡ段空母线进行复役冲击时出现的谐振现象。这是由于母线电压互感器铁心电感受到"激发"而呈现不同程度的饱和,从而破坏了三相电路的对称性引起的谐振,提出了避免谐振的预防与整改措施。
When impacting the no-load bus,ferromagnetic resonance will occur easily in indirect earthed system.Through the analysis on the resonance phenomenon of 35 kV Section Ⅱ no-load bus for recommissioning impact in 220 kV Chengtan substation,the cause is identified as the bus voltage transformer iron core inductance is excited and assumes different levels of saturation.Therefore,the symmetry of the three-phase circuit is damaged and it gives rise to resonance.The resonance prevention and improvement measures are brought forward.
出处
《浙江电力》
2012年第5期17-19,共3页
Zhejiang Electric Power
关键词
电压互感器
谐振
分析处理
voltage transformer
resonance
analysis and treatment
