Test And Analysis Of Distance Measurement Performance Of Traveling Wave Distance Measuring Device And New Double - End Method

Transmission line fault location technique helps to quickly and accurately determine the fault location, reduce the patrol line blindness, shorten the repair time, accelerated recovery of power supply, also to find the potential risks for the transmission line and the weak link. At present, domestic hanging net operation of traveling wave fault location device is respectively supplied by different manufacturers, because there is no uniform for traveling wave fault location devices ranging performance analysis method, resulting in the manufacturers of traveling wave fault location device in multi-vendor in the process of using existing a lot of inconvenience, embodied in a sample frequency, waveform and time window length book there are significant differences, ranging across manufacturers difficult.In this paper, we first discuss the function zoning and requirements of traveling wave fault location device. And then through the measured waveform analysis, it is concluded that the fault location performance analysis method is not good, but in the actual operation, the performance of the equipment can not be fully understood. Needle of this situation, this paper make analysis of ranging performance for different manufacturers of traveling wave fault location devices generally applicable methods, both for follow-up technical personnel were detected regularly and provide an effective basis, but also for enhance the ranging accuracy parameters correction and reliability of the device to provide a reliable guarantee, finally the effectiveness of this method was carried on the analysis and verification.In this paper, based on the traveling wave fault data recorded by the traveling wave fault location device, the measured data can not always meet the strict requirements of the method. After analysis found on both the time synchronization module caused by error, at the same time, also with the traveling wave fault location device transformer, access to cable and other produce time delay, the fault data not after adjustment will greatly reduce fault location accuracy. Therefore, it is supposed to be paid attention to and further research on the application of the double ended ranging method in the case of bilateral sampling data is not synchronized. The based on traveling wave method. Firstly, it analyzes the traveling wave to the timing, after the theoretical derivation found difference sequence correlation and immediately raised a based on fuzzy matching model double terminal traveling wave fault location method, the simulation verify the applicability of the method is better and can in a very short time obtained ranging accuracy requirements within the scope of the ranging results, the reliability is high.