A New Fault Location Algorithm for Compensated Transmission Line Using Distributed Time Domain Model

This paper presents an accurate fault location algorithm for compensated transmission line. The distributed time domain model is used for modelling of the transmission line. This algorithm does not utilize the compensated device model and does not need any knowledge about the operation mode of the compensated device to compute the voltage drop during the fault period. Samples of voltage and current at both ends of the line are taken synchronously and used to calculate the location of fault. Besides the location of fault, the proposed algorithm estimates the fault resistance accurately. The proposed algorithm is not sensitive to fault resistance and does not require any knowledge of source impedances. The proposed method has been tested using EMTP/ATP model of a 400kV, 300km transmission line, which is compensated by a compensator device. The results of computer simulation confirm the accuracy of the proposed method.

Keywords:

Fault location algorithm , Distributed time domain line model , Compensated transmission line