摘要
现场实测了变电站500kV隔离开关动作时电流互感器(CT)二次侧的干扰信号,分析得到了CT二次侧脉冲峰值、脉冲个数和脉冲间隔时间等的时域特征及干扰信号的频谱(频域特征)。实测表明,隔离开关动作时CT二次侧干扰波形为衰减振荡波,干扰电流峰值在1kA以上,干扰主频段在2MHz以下。
Measures the secondary side disturbance signal of CT in 500kV insulated sw itch operations on-site in substation, analyzes and gets the secondary side pulse peak value of CT, pulse number, pulse interval, interference signal spectrum and other time and frequency domain characteristics. The test shows in the insulated switch operation, the secondary side interference wave of CT is decaying oscillation wave, the interference current peak value is over 1kA, and the interference basic frequency is below 2MHz.
出处
《电测与仪表》
北大核心
2005年第6期41-43,共3页
Electrical Measurement & Instrumentation
