Voltage and current actuated hybrid protection scheme for utility grid with high penetration levels of renewable energy Online publication date: Sun, 14-May-2023
by Anup Kumar; Himanshu Sharma; Ram Niwash Mahia
International Journal of Power and Energy Conversion (IJPEC), Vol. 13, No. 3/4, 2022
Abstract: A hybrid current and voltage protection scheme (HCVPS) using Stockwell transform, alienation coefficient and Wigner distribution function is designed to detect and classify the faults on utility network with high (50%) renewable energy. HCVPS detected faults by comparing peak magnitude of hybrid current and voltage fault index (HCVFI) with a threshold and also discriminated faults from operational events. HCVPS has minimum fault detection time and perform better with variations in fault impedance, fault incidence angle, and faults incident at locations of test network. HCVPS effectively detected all faults in time of (1/16)th cycle, with noise of 20 dB SNR and also on practical utility power network. Faults have been classified using numbers of faulty phases and hybrid current and voltage ground fault index (HCVGFI) computed by processing the zero sequence current (ZSC) and zero sequence voltage (ZSV). HCVPS performs better compared to discrete wavelet transform-based method.
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