CAJ | 학술논문

为研究高压开关重击穿过程的发生规律，分析隔离开关和断路器操作产生电磁骚扰的特性，对500 kV变电站开关操作过程中导致二次回路的电磁干扰进行现场测量，并对开关操作产生的骚扰电压进行时域和频域特性分析，确定骚扰等级及主频范围。测量结果表明，就地汇控柜内二次设备端口骚扰电压幅值达到320 V，频率分布集中在45.83 MHz之内。断路器操作时端口骚扰电压有较大的幅值水平，尤其是断路器分闸-合闸-分闸操作时端口骚扰电压在幅值、微脉冲持续时间和上升沿上，相对于隔离开关操作有更为严重的情况出现。
위연구고압개관중격천과정적발생규률，분석격리개관화단로기조작산생전자소우적특성，대500 kV변전참개관조작과정중도치이차회로적전자간우진행현장측량，병대개관조작산생적소우전압진행시역화빈역특성분석，학정소우등급급주빈범위。측량결과표명，취지회공거내이차설비단구소우전압폭치체도320 V，빈솔분포집중재45.83 MHz지내。단로기조작시단구소우전압유교대적폭치수평，우기시단로기분갑-합갑-분갑조작시단구소우전압재폭치、미맥충지속시간화상승연상，상대우격리개관조작유경위엄중적정황출현。
In order to research the outbreak regularity of the repeated break down process, analysis was made to the characteristics of the electromagnetic disturbance caused by the isolation switch and circuit breaker operation. The electromagnetic disturbance of secondary cir-cuits caused by the switching operation was measured in the ifeld, when 500kV substation just put into operation. This paper analyzed the time and frequency characteristics of disturbance voltage in the transient process and determined the disturbance level and the range of domi-nant frequency. Measurement results show that the maximum disturbance voltage on the ports of secondary equipment in control cabinets is 320V, and the disturbance frequency is focus on the range of 45.83MHz. There is considerable disturbance voltage amplitude during circuit breaker closing operations. Especially, there is more serious situation on the amplitude, micro-pulse duration and rising time of the distur-bance voltage during circuit breaker under opening-closing-opening operations.