【摘要】 用特高频法测量GIS局部放电所面临的困难是无法标定出视在放电量,并且也无法确定何种因素影响特高频传感器输出信号的强弱。针对上述问题,利用同轴波导模拟GIS腔体结构,并应用有限时域差分法对局部放电辐射的电磁波在波导内传播情况进行仿真。通过仿真数据分析,找出对特高频信号能量产生影响的多种因素,如:放电位置,波导尺寸,放电电流幅值和放电源的脉冲形状。从而阐明了特高频输出信号能量与原始放电脉冲的关系,为进一步探讨GIS放电量特高频标定打下基础。更多还原

【Abstract】 By UHF method of measuring GIS partial discharge, the big problem is to mark apparent discharge quantity. Moreover, it is hard to distinguish what the principal influence upon magnitude of UHF signals is. To solve them, wave-guide cavity configuration is utilized and FDTD method is used to simulate transmission of PD (partial discharge) electromagnetic wave in wave-guide. Therefore, factors influencing UHF signals are analyzed, which includes position, dimension, PD current amplitude and pulse shape of PD source. According to UHF output signals, original PD pulse can be estimated, which contributes to marking GIS partial discharge.更多还原