Optimum SHEPWM for a new 21-level inverter topology using numerical optimization methods: experimental comparative study

Abstract

This article presents the application of the harmony search (HS) optimization algorithm for harmonic elimination in a new topology of multilevel inverters with a reduced number of electronic switching elements. The main objective of the harmonic elimination strategy is eliminating undesired low rank harmonics in order to improve the quality of the output waveform. The harmonic elimination strategy is achieved by solving a system of nonlinear equations. In this paper, HS optimization is applied using artificial neural networks (ANNs) on a new 21-level inverter topology. The algorithm is based on the music improvisation process. MATLAB programming software was used to develop a HS optimization program for harmonic elimination. The main reason for using selective harmonic elimination based on ANNs in this study is to control the proposed multilevel inverter in real-time. In order to assess the performance of the proposed optimization method, it was compared to particle swarm optimization and the genetic algorithm. A small-scale laboratory of the proposed 21-level inverter is built to validate the simulation results and to prove the efficiency of the proposed control scheme.

Opposition-Based Quantum Bat Algorithm to Eliminate Lower-Order Harmonics of Multilevel Inverters

“…To improve the performance of the conventional GA, other variants hybrid genetic algorithms and the adaptive real coding GA is proposed to solve the drawbacks of the conventional GA-based SHEPWM [17]. Optimized GA techniques were proposed by integrating an artificial neural network (ANN) [20], [21], where the GA was initially used to optimize the switching angles of the SHEPWM, and then the ANN was used to select the best set of solutions. However, the results were not satisfactory as this technique was only applicable to high-frequency modulation techniques and they also suffer from the blackbox constraints of neural networks [22], [23].…”

Multicarrier multimodulation techniques in multilevel neutral point clamped inverter setup for advanced power electronics and drives lab

“…[19][20][21][22][23][24] More details on multilevel inverters can be found in the following works. [25][26][27][28] In this paper, the multilevel neutral point clamped (NPC) inverter is set up for lab. The major objectives of this paper include:…”