高压输电线路电弧故障检测与定位最小二乘法新解

A New Least Error Square Method for Detecting and Locating Arc Fault in EHV Transmission Line

根据长电弧电压电流波形 ,建立了电压方波电弧的理想电压 -电流转移特性曲线和对应的电弧等效模型。对于单相接地短路故障给出了故障相电流故障分量与故障边界电流同相位的结论 ,并提出了利用高压输电线路单侧电压电流采样值和最小二乘技术对短线路及中长线路电弧故障进行检测与定位的一种时域新方法。大量故障测距数字仿真实验表明该测距算法具有较高的测距精度。

According to the voltage and current waveforms of arc,an ideal voltage-current transform characteristic curve and an equivalent circuit representing for long arc have been described in this paper.Consideration of the single-phase-to-earth fault and the phase-to-phase fault,the paper draws a conclusion that the superimposed current component of fault phase has the same phase angle as the fault boundary current.A new time-domain method for locating short circuit fault on HV transmission line using one terminal voltage and current samples at one terminal and least error square method is presented.A lot of digital simulation shows the high accuracy of locating fault.