A New Method of Fault Localization for 500 kV Transmission Lines Based on FRFT-SVD and Curve Fitting

The paper presents the Fractional Fourier Transform-Singular Value Decomposition (FRFT-SVD) method for localization of various power system faults in a 200 km long, 500 kV Egyptian transmission line using sent end-line current signals. Transient simulations are carried out Alternating Program/Electromagnetic Program (ATP-EMTP), and outcomes then examined MATLAB to carry sensitivity analysis against measurement noises, sampling frequency, fault characteristics. proposed work employs signals five distinct kinds at nineteen intermediate points throughout length line. approach utilized construct localizer model is FRFT-SVD. It much more effortless, precise, effective. FRFT-SVD this technique calculate 19 sets indices greatest S value also designed be realistic, with noise corrupting To generate curves, curve fitting applied these indices. Reduced chi-squared modified R-squared criteria used choose best-suited curve. results very precise localization, only 0.0016% average percentage error maximum 0.002% Finally, can employed as proper link between nuclear plant grid. an efficient distance estimation that might contribute creating dependable transient-based protection.