Improved dichotomy iteration algorithm for fault location

HUANG Feiteng，CHEN Mingjun
（College of Information Engineering，Zhejiang University of Technology，Hangzhou 310023，China)

Abstract: Aiming at pseudoroots and nonconvergence and low precision of iteration algorithm for fault location, the monitoring of direction method in dichotomy iteration was investigated. After the analysis of dichotomy iteration and causes of pseudo roots, the relationship of avoiding pseudo roots method and iteration direction was established. An improved dichotomy iteration algorithm was presented to ensure convergence and improve the accuracy by the data processing target, with the monitoring and correcting of direction.The performance of improved algorithm was evaluated on the Matlab simulation system, the avoiding pseudo roots method and fault location accuracy were tested. The simulation results indicate that， this algorithm is effective on the entire range of transmission line, can ensure convergence and it has high precision. Moreover, the results show that the fault resistance and the fault styles and the fault distance have little influence on this algorithm.
Key words: fault location; dichotomy iteration algorithm; pseudo root; monitoring of direction; convergence