A New Algorithm for Fault Ranging on Multi-T Connection Transmission and Distribution Lines
As an important path of power transmission,the operation safety and stability of transmission and distribution lines have always been the focus of power units.At this stage,the characteristics of transmission and distribution lines in China tend to be complicated and multi-T connection.The traditional impedance fault location method and traveling wave method applied to transmission and distribution lines have poor adaptability to complex multi-T connection lines,which leads to high cost and low efficiency of line fault troubleshooting.This paper proposes a network coordinate algorithm which should be highly adaptable to complex T connection transmission and distribution lines.The method first carries out network coordinate processing for the monitoring terminal installed on the monitoring line.When the fault trip occurs on the line,the fault point of the main branch line is roughly confirmed for the monitoring line,and then the fault point is searched by combining the fault location method with the traveling wave method.The new fault location algorithm has good multi-T connection adaptability and fault location stability.
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