Title: Single-phase cross-connected sources asymmetric T-type multilevel inverter with fault tolerant capabilities

Authors: Vinay Kumar; Sanjeev Singh; Shailendra Jain

Addresses: Department of Electrical and Instrumentation Engineering, Sant Longowal Institute of Engineering and Technology, Longowal, Sangrur, Punjab, India ' Department of Electrical Engineering, Maulana Azad National Institute of Technology, Bhopal, Madhya Pradesh, India ' Department of Electrical and Instrumentation Engineering, Sant Longowal Institute of Engineering and Technology, Longowal, Sangrur, Punjab, India

Abstract: This work presents a cross-connected sources asymmetric T-type multilevel inverter (CCSATT-MLI) for single-phase operation with fault tolerant (FT) capabilities. The presented topology uses only one extra power semiconductor switch in the CCSATT 13-level (13L) inverter for fully FT operation. The paper uses two control schemes namely phase opposition disposition sinusoidal pulse width modulation (POD-SPWM) and nearest level control (NLC) for achieving the desired results under single switch open circuit (SSOC) fault. The obtained simulation results of proposed topology using MATLAB/Simulink are presented to show FT operation of the MLI under any SSOC fault. The simulation validations are validated under each switch fault using OpalRT hardware in loop (HIL) platform. The presented topology is also compared with recently reported MLI topologies for reduced number of count claim and effective FT operation in symmetric as well as asymmetric configurations.

Keywords: asymmetric T-type; cross-connected source; fault tolerant; multilevel inverter; MIL; nearest level control; NLC; pulse width modulation; single switch open circuit; SSOC; total harmonic distortion; THD.

DOI: 10.1504/IJPELEC.2023.129975

International Journal of Power Electronics, 2023 Vol.17 No.3, pp.280 - 298

Received: 17 Mar 2021
Accepted: 15 Sep 2021
Published online: 04 Apr 2023 *

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