Title: A comprehensive micro-grid fault protection scheme based on S-transform and machine learning techniques

Authors: Manohar Mishra; Pravat Kumar Rout

Addresses: Department of Electrical Engineering, Institute of Technical Education and Research, Siksha 'O' Anusandhan University, Bhubaneswar, 751030, Odisha, India ' Department of Electrical and Electronics Engineering, Institute of Technical Education and Research, Siksha 'O' Anusandhan University, Bhubaneswar, 751030, Odisha, India

Abstract: This manuscript presents a novel micro-grid protection scheme based on S-transform (ST) and machine learning techniques. Initialisation of the proposed approach is done by extracting the current signals from the targeted buses of different feeders and pre-processing through ST to derive different needful differential features. The extracted features are further used as an input vector to the machine learning model to classify the fault events. The proposed micro-grid protection scheme is tested for different protection scenario, such as the type of fault (symmetrical, asymmetrical and high impedance fault), micro-grid structure (radial and mesh) and mode of operation (islanded and grid connected), etc. Three different machine learning models are tested and compared in this framework: naïve Bayes classifier (NBC), support vector machine (SVM) and extreme learning machine (ELM). The extensive simulated results from a standard IEC micro-grid model prove the effectiveness and reliability of proposed micro-grid protection scheme.

Keywords: micro-grid; S-transform; extreme learning machine; ELM; naïve Bayes classifier; NBC; support vector machine; SVM.

DOI: 10.1504/IJAMECHS.2017.095854

International Journal of Advanced Mechatronic Systems, 2017 Vol.7 No.5, pp.274 - 289

Available online: 19 Oct 2018 *

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