Reliability improvement of station traveling wave fault location based on protection information
WU Zhanguo1, QIAO Yufeng1, LI Huiyong2, XU Xiaochun3, HUANG Tao3
1. Inner Mongolia Electric Power Co., Ltd, Hohhot 010020; 2. Ulanqab Power Supply Bureau, Inner Mongolia Electric Power Co., Ltd, Ulanqab, Inner Mongolia 012000; 3. NR Electric Co., Ltd, Nanjing 211102
Abstract：Traveling wave fault location (TWFL) has the advantages of high accuracy and little influence by the system operation mode, but the independent TWFL is vulnerable to noise, which leads to a bad reliability. Traditional AC line protection technology is mature and has strong anti-interference ability and high reliability. It is a feasible technical route to improve the TWFL reliability by using protection information. In this paper, based on the integration of protection and TWFL, the problems of independent TWFL and the information interaction technology between protection and TWFL are analyzed. Combined with the protection related information, detailed technical schemes to improve the reliability of station TWFL are presented, which include fault location start-up, synchronous phase selection and fault location result screening. Based on the above technologies, the software and hardware test platform are built, and the experimental results verifiy the effectiveness of the proposed schemes.
2021, Vol. 22 
