Analysis of Selective Harmonic Elimination Pulse Width Modulation for a Three-Phase Multilevel-Inverter

<p>In this work, a three-phase of multilevel inverter (MLI) with reduced number of switches components based on Newton Raphson (NR) and Particle Swarm Optimization (PSO) techniques were presented. The Selective Harmonic Elimination Pulse-Width Modulation (SHE-PWM) is a powerful technique for harmonic minimization in multilevel inverter within allowable limits. NR and PSO techniques were used to determine the switching angles by solving the non-linear equation's analysis of the output voltage waveform of the modified CHB-MLI in order to control the fundamental component. A comparison has been made between NR and PSO techniques related to optimization in order minimize harmonic distortion. The main aims of this paper cover design, modeling, construction the modified topology of the CHB-MLI for a three phase five levels inverter. The controllers based on NR and PSO were applied to the modified multilevel inverter. The inverter offers much less THD using PSO scheme compared with the NR scheme. The performance of the proposed controllers based on NR and PSO techniques done by using MATLAB/Simulink of results are compared.</p>

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Selective Harmonic Elimination Pulse Width Modulation for Five-phase Cascaded Multilevel Inverter Using Non-notch and Notch Switching Technique

Journal of Advanced Research in Dynamical and Control Systems ◽

10.5373/jardcs/v12sp7/20202220 ◽

2020 ◽

Vol 12 (SP7) ◽

pp. 1196-1207

Author(s):

Muhammad Sirajuddin Muhammad Azhar Walter

Keyword(s):

Pulse Width ◽

Pulse Width Modulation ◽

Multilevel Inverter ◽

Harmonic Elimination ◽

Selective Harmonic Elimination ◽

Cascaded Multilevel Inverter

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Optimization-based open-loop selective harmonic elimination pulse width modulation for multilevel inverter flying capacitor voltage balance considering load power factor variation

Proceedings of the Institution of Mechanical Engineers Part I Journal of Systems and Control Engineering ◽

10.1177/0959651820939342 ◽

2020 ◽

pp. 095965182093934

Author(s):

Faouzi Armi ◽

Lazhar Manai ◽

Mongi Besbes

Keyword(s):

Power Factor ◽

Control Strategy ◽

Pulse Width ◽

Pulse Width Modulation ◽

Open Loop ◽

Multilevel Inverter ◽

Load Power ◽

Harmonic Elimination ◽

Selective Harmonic Elimination ◽

Capacitor Voltage

In this article, Newton–Raphson optimization-based selective harmonic elimination pulse width modulation is investigated for open-loop control of flying capacitor multilevel inverter. Proposed control strategy has allowed giving up current and voltage measurement instrumentations and sensors used in case of closed loop–based control. Proposed control strategy generates accurate switching angles, capable to balance flying capacitor voltage and eliminate lower order harmonics considering load power factor variation. Algorithm performances are verified by simulation and experiments, and obtained results prove that proposed technique does effectively eliminate specific harmonics and balance capacitor voltages while getting inverter output voltage with desired number of levels.

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Design and Implementation of GA Based Selective Harmonic Elimination in Modified Cascaded Multilevel Inverter

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.573.3 ◽

2014 ◽

Vol 573 ◽

pp. 3-6

Author(s):

S. Dhayanandh ◽

S. Manoharan

Keyword(s):

Pulse Width ◽

Pulse Width Modulation ◽

Harmonic Spectrum ◽

Multilevel Inverter ◽

Harmonic Elimination ◽

Selective Harmonic Elimination ◽

Seventh Order ◽

High Control ◽

Power Application ◽

Cascaded Multilevel Inverter

- The emergence of multilevel inverters has been in increase since the last decade. These new types of converters are suitable for high voltage and high power application due to their ability to synthesize waveforms with better harmonic spectrum. Numerous topologies have been introduced and widely studied for utility and induction billet applications. In this paper, proposed a Modified Multilevel Inverter (MMI) is eleven Levels. This proposed MMI consists of less number of switches to attain eleven levels when compared to the traditional cascaded multilevel inverter to attain the same level. As a result, voltage current stress across switches gets reduced, so that power loss gets reduced in the system. Secondly, an effective pulse width modulation (PWM) approach that can be utilized successfully with high control accuracy is combination of selective harmonic elimination and pulse width modulation (SHEPWM).This technique offers many advantages other PWM techniques including direct control over output waveform harmonics, and the ability to eliminate third, fifth and seventh order harmonics.

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