带有并联电抗器的超高压输电线路发生单相故障两端跳闸后,断开相恢复电压的组成成分在瞬时性故障时比永久性故障时多了一项自由分量,因此通过对断开相恢复电压在一个工频周期内进行积分就可以区分两种不同性质的故障。该判据原理简单,灵敏度高,实际操作方便,判断时间快,有效地解决了现有判据判断时间长的问题。大量的仿真实验验证了所得结论的正确性。 After a single-phase fault occurs in a UHV transmission line with a shunt reactor, the components of the broken-line phase recovery voltage have a more free component than the permanent fault in the case of an instantaneous fault. Therefore, The recovery voltage can be differentiated between two different types of faults by integrating in a single frequency cycle. The principle of the criterion is simple, the sensitivity is high, the practical operation is convenient, the judgment time is fast, and the existing criterion is solved effectively for a long time. A large number of simulation experiments verify the correctness of the conclusions obtained.