STUDY ON A NEW TYPE OF INTEGRATIVE FAULT LOCATION SYSTEM FOR TRANSMISSION LINE
Zeng Xiangjun1,Yin Xianggen1,Chen H ao1,Yu Chang1,Wu Jieyu1,L in Fuchang1, Zhang Zhe1,Chen Deshu1,Luo Yifang2 1 . Huazhong University of Science and Technology,Wuhan 430 0 74,China 2 . Central China Electric Power Corporation,Wuhan 430 0 77,China
There are some defects on reliability and precision in traditional fault location methods for transmission line based on fault fundamental component or fault transient traveling wave. This paper improves these two methods. By the improved fault fundamental component based location method,computation is simplified and location precision is better,while the improved traveling wave based location method applies new traveling wave sensor,GPS synchronous clock with high precision and high sampling frequency,and wavelet transform for detecting the head of traveling wave. Combining these two methods, a new type of integrative fault location system for transmission line is developed. Dynamic simulation test,HV impulse test and RTDS test results all show that this system has high robustness,high reliability and high precision.