Indian Journal of Science and Technology

Abstract

Objectives: The proposed scheme presents a fault direction estimation as well as fault location determination technique for short transmission line using positive sequence component. An objective of the suggested work is to recognize direction of fault and locate it in short transmission line using positive sequence component. Methods/Analysis: Solution is given based on difference between positive sequence post-fault and steady state current phasor and difference of magnitude among post-fault and steady state positive sequence voltage phasor for fault direction estimation. Fault location is estimated by two-terminal method. Fast Fourier Transform is considered to detect the direction of fault and Discrete Fourier Transform is used to find the location of fault. The proposed work is estimated by simulated data in PSCAD and MATLAB/SIMULINK for a compensated line. Findings: Fault detection as well as fault location estimation in both sections of compensated line considering transmission line issues is identified properly. Many techniques are available for fault direction estimation and fault location determination. Sometimes available methods do not provide proper result of different issues which are present in compensated system. The proposed method is tested for forward power flow, reverse power flow, voltage inversion and current inversion cases. Simulation results show that proposed technique properly detects the direction of fault and locating the exact location of fault. Novelty/ Improvement: This approach deals with detection as well as location identification of fault in compensated system, so it is computationally efficient.

Keywords: Compensated System, DFT, Fault Detection, FFT, Fault Location, PSCAD, Sequence Components