CAJ | 학술논문

气体绝缘组合开关设备（gas insulated switchgear,GIS）中隔离开关操作会产生特快速瞬态过电压（very fast transient overvoltage,VFTO）。VFTO的全波形包含数十MHz的高频成分和准直流的低频成分。因此,VF-TO测量系统要有良好的瞬态响应和稳态响应特性,这就要求对测量系统的频率响应特性和分压比进行严格的标定。为此,利用阶跃波在均匀传输线中传输的原理,自行设计了阶跃电压行波发生装置,根据电容分压式测量系统输入和输出信号的关系,推导了在输入为理想阶跃信号的情况下,输出信号上升时间和测量系统3dB高频截止频率的关系,标定了测量系统的高频特性。根据测量系统低压臂时间常数和3dB低频截止频率的关系,标定了低频特性,测量系统带宽为0.003Hz～87.5MHz。对安装于实际GIS中的测量系统,使用已知幅值的工频和雷电波标定测量系统的分压比为6.6×105。可见,该测量系统满足对VFTO全过程波形进行测量的要求。
기체절연조합개관설비（gas insulated switchgear,GIS）중격리개관조작회산생특쾌속순태과전압（very fast transient overvoltage,VFTO）。VFTO적전파형포함수십MHz적고빈성분화준직류적저빈성분。인차,VF-TO측량계통요유량호적순태향응화은태향응특성,저취요구대측량계통적빈솔향응특성화분압비진행엄격적표정。위차,이용계약파재균균전수선중전수적원리,자행설계료계약전압행파발생장치,근거전용분압식측량계통수입화수출신호적관계,추도료재수입위이상계약신호적정황하,수출신호상승시간화측량계통3dB고빈절지빈솔적관계,표정료측량계통적고빈특성。근거측량계통저압비시간상수화3dB저빈절지빈솔적관계,표정료저빈특성,측량계통대관위0.003Hz～87.5MHz。대안장우실제GIS중적측량계통,사용이지폭치적공빈화뇌전파표정측량계통적분압비위6.6×105。가견,해측량계통만족대VFTO전과정파형진행측량적요구。
Very fast transient overvoltage（VFTO） is also generated during the operation of disconnect switch of gas insulated switchgear（GIS）.The full waveform of VFTO includes not only high frequency components up to several tens of MHz,but also low frequency components.Therefore,the measurement system must have perfect performance of transient and steady-state response.It is very important to calibrate the frequency characteristic and voltage ratio of the measurement system in order to make sure whether the measurement system can measure the full waveform of VFTO accurately.According to the principle of wave propagation along uniform transmission line,we established an apparatus generating step voltage wave;according to the output and input signals of the measurement system,we obtained a relation between the rise time of output signal and 3 dB high cutoff frequency of the measurement system when the input signal was ideal step signal,and calibrated the high frequency characteristic using the apparatus;according to the relation between low voltage arm time constant and 3 dB low cutoff frequency,we calibrated the low frequency characteristic.The 3 dB bandwidth of the measurement system was 0.003 Hz~87.5 MHz.When the measurement system was installed in actual GIS,the voltage ratio of the measurement system was determined for power frequency voltage and lightning voltage to be 6.6×105.It is revealed that the measurement system can be used to measure full waveform of VFTO generated in ultra high voltage GIS.