基于参数修正的输电线路双端不同步测距方法

针对线路双端数据不同步与线路参数不确定性所产生的测距误差问题,提出了基于参数修正的双端不同步测距方法以实现输电线路发生非对称故障时的准确定位。该方法定义了线路参数修正系数,利用等值序网分析法消除了数据不同步角的影响,然后应用仿电磁学算法求解了所建立的故障测距方程组,得到了线路故障位置。仿真分析与实际线路的计算结果表明,所提方法不受线路参数变化的影响,利用故障后的双端不同步数据即可进行故障定位,具有很高的测距精度与可靠性。

Asynchronous two-terminal fault location method of transmission line based on parameter modification

Aiming at the fault location errors caused by asynchronous data and line parameter uncertainty, an asynchronous two-terminal fault location method based on parameter modification is proposed to locate the asynchronous fault. Based on the defined parameter correction coefficient, the effect of asynchronous angle is eliminated through equivalent sequence-network analysis. The fault location equations are established and then solved through the electromagnetic-like mechanism algorithm to locate the fault position. Both simulative results and calculative results of actual line show that immune to the change of line parameters, the proposed method can locate the fault position only using unsynchronized fault data with high accuracy and reliability.