scholarly journals Enhance the accuracy of control algorithm for multilevel inverter based on artificial neural network

2020 ◽  
Vol 20 (3) ◽  
pp. 1148
Author(s):  
Mohammed Rasheed ◽  
Moataz M. A. Alakkad ◽  
Rosli Omar ◽  
Marizan Sulaiman ◽  
Wahidah Abd Halim
Keyword(s):  
Neural Network ◽  
Artificial Neural Network ◽  
Real Time ◽  
Optimization Technique ◽  
Harmonic Distortion ◽  
Multilevel Inverter ◽  
Multilevel Inverters ◽  
Harmonic Elimination ◽  
Selective Harmonic Elimination ◽  
Artificial Neural

<p>In converters or multilevel inverters it is very important to ensure that the output of the<br />multilevel inverters waveforms in term of the voltage or current of the waveforms is<br />smooth and without distortion. The artificial neural network (ANN) technique to<br />obtaining proper switching angles sequences for a uniform step asymmetrical modified<br />multilevel inverter by eliminating specified higher-order harmonics while maintaining<br />the required fundamental voltage and current waveform. However, through this paper a<br />modified CHB-MLI are proposed using artificial intelligence optimization technique<br />based on modulation Selective Harmonic Elimination (SHE-PWM). A most powerful<br />modulation technique that used to minimize a harmonic contants during the outout<br />waveform of multilevel inverter is a SHE-PWM method. The proposed a five-level<br />Modified Cascaded H-Bridge Multilevel Inverter (M-CHBMI) with ANN controller to<br />improve the output voltage and current performance and achieve a lower Total<br />Harmonic Distortion (THD). The main aims of this paper cover design, modeling,<br />prediction for real-time generation of optimal switching angles in a single-phase<br />topology of modified five level CHB-MLI. due to the heavy cost of computation to<br />solving transcendental nonlinear equations with specified number, a real-time<br />application of Selective Harmonic Elimination-Pulse Width Modulation (SHE-PWM)<br />technique is limited. SHE equations known as a transcendental nonlinear equation that<br />contain trigonometric functions. The prototype of a 5-level inverter in Digital Signal<br />Processing (DSP) TMS320F2812 reveals that the proposed method is highly efficient<br />for harmonic reduction in modified multilevel inverter.</p>

scholarly journals Swarm Optimization-Based Modified Selective Harmonic Elimination PWM Technique Application in Symmetrical H-Bridge Type Multilevel Inverters

2019 ◽  
Vol 9 (1) ◽  
pp. 3836-3845
Author(s):  
Y. Gopal ◽  
K. P. Panda ◽  
D. Birla ◽  
M. Lalwani
Keyword(s):  
Harmonic Distortion ◽  
Transcendental Equation ◽  
Multilevel Inverter ◽  
Swarm Optimization ◽  
Multilevel Inverters ◽  
Harmonic Elimination ◽  
New Variant ◽  
Selective Harmonic Elimination ◽  
Bridge Type ◽  
Circuit Components

The problem of elimination of harmonics and the need of a large number of switches in multilevel inverters (MLIs) have been a hot topic of research over the last decades. In this paper, a new variant swarm optimization (SO) based selective harmonic elimination (SHE) technique is described to minimize harmonics in MLIs, which is a complex optimization problem involving non-linear transcendental equation. Optimum switching angles are calculated by the proposed algorithms considering minimum total harmonic distortion (THD) and the best results are taken for controlling the operation of MLIs. The performance of the proposed algorithm is compared with the genetic algorithm (GA). Conventional MLIs have some disadvantages such as the requirement of a large number of circuit components, complex control, and voltage balancing problems. A novel seven-level reduced switch multilevel inverter (RS MLI) is proposed in this paper to recoup the need of a large number of switches. Matlab/Simulink software is used for the simulation of two symmetrical topologies, i.e., a seven-level cascaded H-bridge multilevel inverter (CHB MLI) and a seven-level (RS MLI). Simulation results are validated by developing a prototype of both MLIs. The enhancement of the output voltage waveform confirms the effectiveness of the proposed SO SHE approach.

scholarly journals Archimedes Optimization Algorithm Based Selective Harmonic Elimination in a Cascaded H-Bridge Multilevel Inverter

2021 ◽  
Vol 14 (1) ◽  
pp. 310
Author(s):  
Rashid Ahmed Khan ◽  
Shoeb Azam Farooqui ◽  
Mohammad Irfan Sarwar ◽  
Seerin Ahmad ◽  
Mohd Tariq ◽  
...  
Keyword(s):  
Optimization Algorithm ◽  
Performance Optimization ◽  
High Performance ◽  
Optimization Technique ◽  
Harmonic Distortion ◽  
Multilevel Inverter ◽  
Optimal Switching ◽  
Buoyant Force ◽  
Harmonic Elimination ◽  
Selective Harmonic Elimination

This paper presents the Archimedes optimization algorithm to eliminate selective harmonics in a cascaded H-bridge (CHB) multilevel inverter (MLI). The foremost objective of the selective harmonic elimination (SHE) is to eliminate lower order harmonics by finding the optimal switching angle combination which minimizes the objective function containing Total Harmonic Distortion (THD) and other specific harmonic terms. Consequently, the THD is also reduced. In this study, a recently proposed metaheuristic technique named the Archimedes optimization algorithm (AOA) is used to determine the optimal angles corresponding to the 5, 7 and 9 level CHB-MLI. AOA involves equations related to a physical law, the Archimedes Principle. It is based on the idea of a buoyant force acting upward on a body or object that is partially or completely submerged in a fluid, and the upward force is related to the weight of the fluid displaced. This optimization technique has been implemented on CHB-MLI to generate various level outputs, simulated on MATLAB™ R2021a version environment software. The simulation results reveal that AOA is a high-performance optimization technique in terms of convergence speed and exploitation-exploration balance and is well-suited to the solution of the SHE problem. Furthermore, the laboratory validated the simulation result on a hardware setup using DSP-TMS320F28379D.

scholarly journals Dual Phase Analysis Based Harmonic Elimination in Multilevel Inverters

2020 ◽  
pp. 145-148
Author(s):  
Vijayalakshmi V J ◽  
Ravikumar P ◽  
Uthirasamy R ◽  
Karpagam J
Keyword(s):  
Neural Network ◽  
Artificial Neural Network ◽  
Phase Analysis ◽  
Optimization Technique ◽  
Dual Phase ◽  
Multilevel Inverters ◽  
Harmonic Elimination ◽  
Non Linear ◽  
Simulation Results ◽  
Inverter Circuit

In this paper Dual Phase Analysis based harmonic elimination technique is proposed for eliminating selected harmonics present in the multilevel inverters. Elimination of harmonics is done by considering equal DC sources. The switching angles are calculated using Artificial Neural Network. As an example, nine level inverters are considered and simulated using the switching angles obtained from the optimization technique for non linear loads. The simulation results validate the effectiveness of the method in eliminating selected harmonics present in the inverter circuit.

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