Comparison of ATP Simulation and Micro-processor Based Fault Location Using DFT

This paper evaluates the results of a microprocessor based fault locator employed on a laboratory power system model with those obtained within EMTP/ATP simulations. The Discrete Fourier Transform concept is used to extract the fundamental frequency components of the voltage and current waveforms under fault and the reactance based method to locate the fault. The results suggest a close correlation between the experimental and simulation studies for all fault types.