基于线路参数变化的双端行波故障测距研究

通过考虑线路参数的变化,提出了一种双端行波故障测距算法,该算法利用双端行波故障测距装置本身在区外线路故障时,在线测量波速,通过小波变换对初始行波波头实现可靠拾取.通过仿真计算验证,本算法所测故障测距结果稳定、可靠,能够满足现场运行的需要.

Study on the Fault Location of Two-terminal Traveling Wave for Parameter Changes

A two-terminal traveling wave fault location algorithm is proposed by considering the parameters change.In the algorithm,the time that the first traveling wave arrive is detected by wavelet transform,and traveling wave velocity is measured by using the two terminal traveling wave fault location system itself for the faults that happen beyond the protection zone.Simulation results show that steady and credible fault location can be obtained by use of the algorithm which is not affected by the variation of transmission line parameter.