Transmission Line Protection Schemes Based on Wigner Distribution Function and Discrete Wavelet Transform

This research work presents a current based approach using discrete wavelet transform and Wigner distribution function for detection and classification of transmission line faults. Algorithm is tested for different case studies such as variations in fault location on transmission line, variations in fault impedance and event of reverse power flow. The algorithm is also tested for switching transients. Performance of the algorithm is compared with the performance of an algorithm reported in literature. The study has been carried out in MATLAB/Simulink environment.