Particle Swarm Optimization Approach to Harmonic Reduction in Voltage Source Multilevel Inverter
Adeyemo I. A1, Okediran, O. O2, Oyeleye, C. A.3
1Adeyemo, I. A, Department of Electronic & Electrical Engineering, Ladoke Akintola University of Technology, PMB, Ogbomoso, Oyo State, Nigeria.
2Okediran, O. O, Department of Computer Science & Engineering, Ladoke Akintola University of Technology, PMB, Ogbomoso, Oyo State, Nigeria.
3Oyeleye, C. A, Department of Computer Science & Engineering, Ladoke Akintola University of Technology, PMB 4000, Ogbomoso, Oyo State, Nigeria.
Manuscript received on October 17, 2015. | Revised Manuscript received on October 28, 2015. | Manuscript published on November 05, 2015. | PP: 1-5 | Volume-5 Issue-5, November 2015 . | Retrieval Number: E2724115515/2015©BEIESP
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©The Authors. Published By: Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/
Abstract: In Selective Harmonic Elimination-Pulse Width Modulation (SHE-PWM) technique, optimal switching angles at fundamental switching frequency are computed such that low order harmonics are eliminated, while the fundamental voltage is obtained as desired. The main challenge associated with SHEPWM technique is that a specified number of transcendental nonlinear equations known as Selective Harmonic Elimination (SHE) equations have to be solved to obtain the appropriate switching angles. In this paper, Particle Swarm Optimization (PSO) algorithm with random initial values is proposed for solving SHE equations of an 11-level inverter. The proposed method is derivative-free, accurate and globally convergent. Both computational and MATLAB simulation results show that the proposed method is highly efficient for elimination of the selected low order harmonics as well as minimization of the total harmonic distortion (THD).
Keywords: Multilevel inverter, PSO, modulation index, and harmonics.