超高压电缆故障测寻实用方法研究

提出了一种利用超高压电缆两端的故障录波数据进行故障测距的新方法,该方法比较充分地考虑了超高压电缆线路分布电容大的特点,利用递推法在算法上模拟实际线路的电压、电流分布,以提高定位精度。该方法不要求双端数据同步,不受线路两端系统阻抗和过渡电阻的影响,不存在伪根判别问题,易于实现。仿真结果显示这种算法具有较高的测距精度和实用价值。

Study of practical method for fault detection and location of EHV cables

A new method for accurate fault location is introduced, which uses fault record data from both terminals of the EHV cable line. Based on the characteristics of big distributed capacity at EHV cable line, the voltage and current distributions of EHV cable line are simulated with iterative calculation to improve the precision. Simulation results show that the method does not require data to be synchronized at both terminals of the line, or affect by system resistance or transient resistance and has no false-root identification problem,so it is easily to be realized. The simulation results show that this method has a higher precison and practical value.