【摘要】 分析了单相故障被单相切除后线路上的暂态过程,发现当短路点熄弧后,三序网络的自振电压频率不同造成故障相上自振电压不为零,据此,提出了判别永久故障的方法,并对单相接地跳三相的情况时作了简略分析。最后,由MATLAB仿真计算表明,该判据具有较好的识别性能。更多还原

【Abstract】 By analyzing the transient process of the circuit line after the single phase fault had been removed,it was found that the difference of self-vibration voltage frequency on three sequence net results that the self-vibration voltage on the phase was not equal to zero after the arc extinguishing.On this basis,a method for permanent fault judgment method was proposed and the single phase grounding to jump three-phase situation was briefly analyzed.Finally,the MATLAB simulation showed that the criterion had good recognition performance.更多还原