T型输电线路组合行波测距方法

为了提高传统的双端行波测距精度,在分析故障行波传播过程的基础上,提出一种T型输电线路组合行波测距方法。首先利用双端原理区分故障发生区段,进而判断第二次到达各母线侧行波为故障点反射波还是分支点反射波,最后由单端原理进行故障测距。本方法优势在于消除了给定线路长度误差以及线路两端时间同步误差对传统的双端测距精度的影响。通过PSCAD仿真分析,与传统的双端测距方法相比,所提T型输电线路组合行波测距方法的测距精度明显提高。

Combined Traveling Wave Fault Location Method for T Transmission Line

In order to improve the traditional double terminal traveling waves ranging accuracy, based on the analysis of fault traveling wave propagation process, we propose a combination of T-type transmission line traveling wave method. First, the principle of distinction between the use of double-ended failure zone, and then judge each bus side to reach the second wave of the fault line or branch points of the reflected wave reflected wave, and finally by the principle of a single-ended fault location. The advantage of the method is to eliminate the effect of a given line length error and the line ends exactly traveling wave synchronization problem of the traditional double ended ranging precision. By PSCAD simulation analysis, compared with conventional double ended ranging method, T-type and transmission line traveling wave significantly improved accuracy.