Study and Improvement of Transmission Networks Fault Location Technique

• Main Authors: Ching-Hsin Chao, 趙敬昕
• Other Authors: 劉志文
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/tj2wd4

碩士 === 國立臺灣大學 === 電機工程學研究所 === 105 === Taiwan Power Company’s 345kV and 161kV transmission network are composed of underground cables , overhead lines, a variety of wire diameter and three-terminal transmission line structure . Usually, calculation of the fault location can use digital relay’s data but digital relay has huge fault location error. Therefore this paper through the intervals of the fault current waveform window to reduce the fault location error. Developing the fault location algorithm by intervals of the fault current waveform window, we choose correct fault index D value to make fault distance more accurately. In two- terminal and three- terminal transmission line, this paper introduces how to use intervals of the fault current waveform window in fault location and to retrieve fault data of voltage and current. In addition, this paper shows methods of under the one-terminal open circuit fault location, and discusses the relationship between fault impedance and accuracy of fault distance by one-terminal open-circuit fault location algorithm and MATLAB / SIMULINK simulation. Further combines the fault locator developed by the fault location technique to make the fault location system more perfect.