Modelling and Simulation of Single Ended Fault Location Algorithm for the Distributed Transmission Lines

Abstract

Today's power system needs accurate fault location algorithm to maintain its security and reliability. Detection of accurate fault location can lead to quick repair at a fault location which can ultimately avoid huge economical loss. An accurate fault location algorithm is presented in this paper that works reliably for all types of fault. The method proposed in this paper uses pure fault current contribution from the source side up to fault point to reduce the reactance error occurred by system non-homogeneity and the knowledge of source impedance is also not required. The simulations are performed using distributed line model in MATLAB Simulink. The algorithm along with mathematical derivation and corresponding results are presented in this paper. It has been tested for system non-homogeneity, power angle variation, and variation in fault resistance. Also, the proposed algorithm is compared with the results of existing single ended algorithms like simple reactance method, Takagi method, Erriksson method. The results of the simulation yield satisfactory results.