Distance measurement method for transmission line fault based on TT transform and wave velocity optimization

The invention discloses a distance measurement method for a transmission line fault based on the TT transform and the wave velocity optimization. The method is characterized by comprising the following steps of: 1) extraction of fault signals; 2) signal decoupling; 3) detection of mutation points of a traveling wave in a fault 1 mode; 4) optimization of a wave velocity; 5) determination of a faultsection; 6) distance measurement for faults. According to the distance measurement method for the transmission line fault based on the TT transform and the wave velocity optimization, the method canimproves the detection precision of the mutation points of the traveling wave, thereby improving the precision of the distance measurement for the transmission line fault; and the application range iswide. 本发明公开了种基于TT变换和波速优化的输电线路故障测距方法，其特征是，包括如下步骤：1）故障信号提取；2）信号解耦；3）故障1模行波突变点检测；4）波速优化；5）故障区段判定；6）故障测距。这种方法能提高行波奇异点检测精度，进而提高输电线路故障测距精度，适用范围广。