Title: Selective harmonics elimination for three-phase seven-level CHB inverter using backtracking search algorithm

Authors: Sourabh Kundu; Arka Deb Burman; Santu Kr. Giri; Sarbani Mukherjee; Subrata Banerjee

Addresses: Department of Electrical Engineering, National Institute of Technology Durgapur, Durgapur-713209, India ' Department of Electrical Engineering, National Institute of Technology Durgapur, Durgapur-713209, India ' SET Division, CSIR-Central Mechanical Engineering Research Institute, Durgapur-713209, India ' SET Division, CSIR-Central Mechanical Engineering Research Institute, Durgapur-713209, India ' Department of Electrical Engineering, National Institute of Technology Durgapur, Durgapur-713209, India

Abstract: This paper introduces backtracking search algorithm (BSA) to solve the nonlinear transcendental equations to obtain triggering angles of a three phase seven-level cascaded H-bridge (CHB) inverter and also eliminates 5th and 7th order harmonics while satisfying the requested fundamental component. A comparative study has been made in terms of execution time, the statistical probability of achieving global minima, and a rank of convergence rate to establish the supremacy of the BSA optimisation technique over other recognised methods such as genetic algorithm, BEE algorithm, and particle swarm optimisation techniques. Simulation and experimental results confirm the effectiveness and accuracy for obtaining precise switching instants that fruitfully satisfy the required output voltage quality.

Keywords: backtracking search algorithm; BSA; BEE algorithm; BA; cascaded H-bridge; CHB; genetic algorithm; GA; particle swarm algorithm; PSO; selective harmonic elimination pulse width modulation; SHE-PWM.

DOI: 10.1504/IJPELEC.2020.103947

International Journal of Power Electronics, 2020 Vol.11 No.1, pp.1 - 19

Received: 04 Jul 2017
Accepted: 29 Aug 2017
Published online: 03 Dec 2019 *

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