Design and Simulation of a Novel Nine Level Inverter Topology for Motor Application

In the couple of years, the demand of multilevel inverter has expeditiously increased in the field of utilization of electrical energy. Because the multilevel inverter is a key technology to integrate the different renewable energy sources (wind, solar etc) with the grid. In this research work, authors have configured a novel topology of nine level multilevel inverter has less number of switches with dc voltage sources. The presented approach has been designed to 9-level inverter with seven unidirectional switches with voltage sources. It comprises of an H-bridge which synthesize to ac voltage by utilizing almost all possible additive and subtractive cases of the voltage sources with its combinational power switches and generated optimal firing angles using selective harmonic elimination method with Genetic Algorithm to decrease the lower order harmonic present in the output voltage of the, which supplied by the presented nine-level inverter. It has been concluded that presented approach use a less number of power switches in drive circuit and the number of dc voltage sources also make a simple circuit and enhance the efficiency of the complete system

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A new low cost cascaded transformer multilevel inverter topology using minimum number of components with modified selective harmonic elimination modulation

Ain Shams Engineering Journal ◽

10.1016/j.asej.2014.08.005 ◽

2015 ◽

Vol 6 (1) ◽

pp. 67-73 ◽

Cited By ~ 12

Author(s):

H. Khounjahan ◽

M.R. Banaei ◽

Amir Farakhor

Keyword(s):

Low Cost ◽

Multilevel Inverter ◽

Number Of Components ◽

Harmonic Elimination ◽

Selective Harmonic Elimination ◽

Minimum Number ◽

Inverter Topology

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Output Voltage Synthesis of a Modular Battery System based on a Cascaded H-Bridge Multilevel Inverter Topology for Vehicle Propulsion: Multilevel Pulse Width Modulation vs. Fundamental Selective Harmonic Elimination

2020 IEEE Transportation Electrification Conference & Expo (ITEC) ◽

10.1109/itec48692.2020.9161658 ◽

2020 ◽

Author(s):

Anton Kersten ◽

Lukas Baum ◽

Weiji Han ◽

Torbjorn Thiringer ◽

Massimo Bongiorno

Keyword(s):

Pulse Width ◽

Output Voltage ◽

Pulse Width Modulation ◽

Multilevel Inverter ◽

Battery System ◽

Vehicle Propulsion ◽

Harmonic Elimination ◽

Selective Harmonic Elimination ◽

Inverter Topology

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WTHD minimisation in hybrid multilevel inverter using biogeographical based optimisation

Archives of Electrical Engineering ◽

10.2478/aee-2014-0015 ◽

2014 ◽

Vol 63 (2) ◽

pp. 187-196

Author(s):

R. Kavitha ◽

Rani Thottungal

Keyword(s):

Lower Order ◽

Harmonic Distortion ◽

Transcendental Equation ◽

Multilevel Inverter ◽

Total Harmonic Distortion ◽

Harmonic Elimination ◽

Selective Harmonic Elimination ◽

Simulation Results ◽

Cascaded Multilevel Inverter ◽

Inverter Topology

Abstract Harmonic minimisation in hybrid cascaded multilevel inverter involves complex nonlinear transcendental equation with multiple solutions. Hybrid cascaded multilevel can be implemented using reduced switch count when compared to traditional cascaded multilevel inverter topology. In this paper Biogeographical Based Optimisation (BBO) technique is applied to Hybrid multilevel inverter to determine the optimum switching angles with weighted total harmonic distortion (WTHD) as the objective function. Optimisation based on WTHD combines the advantage of both OMTHD (Optimal Minimisation of Total Harmonic Distortion) and SHE (Selective Harmonic Elimination) PWM. WTHD optimisation has the benefit of eliminating the specific lower order harmonics as in SHEPWM and minimisation of THD as in OMTHD. The simulation and experimental results for a 7 level multilevel inverter were presented. The results indicate that WTHD optimization provides both elimination of lower order harmonics and minimisation of Total Harmonic Distortion when compared to conventional OMTHD and SHE PWM. Experimental prototype of a seven level hybrid cascaded multilevel inverter is implemented to verify the simulation results.

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Mitigation of Harmonics from Output of Cascaded H Bridge Multilevel Inverter Using SHE PWM and AI Technique: A Review

Recent Advances in Electrical & Electronic Engineering (Formerly Recent Patents on Electrical & Electronic Engineering) ◽

10.2174/2213111607666200214121450 ◽

2020 ◽

Vol 13 (7) ◽

pp. 952-968 ◽

Cited By ~ 1

Author(s):

Kaushal Bhatt ◽

Sandeep Chakravorty

Keyword(s):

Electromagnetic Interference ◽

Renewable Energy Sources ◽

Multilevel Inverter ◽

Switching Frequency ◽

Switching Loss ◽

Harmonic Reduction ◽

Harmonic Elimination ◽

Sinusoidal Input ◽

Selective Harmonic Elimination ◽

Modulation Techniques

An extensive use of fossil fuel has led to an extreme increment of carbon footprint in the world globally. Glaciers are melting on the earth’s poles due to the greenhouse effect. Many such natural indications urge us to adopt renewable energy sources. In most cases, renewable power is generated in electrical form, which does not suit the existing grid requirements. Cascaded H bridge with multilevel inverter topology is promising in this context. The output of the multilevel inverter is near to sinusoidal. It has added advantages of low device stress, no need for step-up transformers, low common-mode voltage, near sinusoidal input current, low switching frequency, and reduced harmonics. The direct output of Cascaded H bridge multilevel inverters may not be suitable for many applications like integrating solar panel output with an existing grid where harmonic reduction is necessary. Various modulation techniques are available like sinusoidal pulse width modulation, space vector modulation, and selective harmonic elimination. Among the listed modulation techniques, selective harmonic elimination can be implemented with the low switching frequency, and it is suitable where low electromagnetic interference, low switching loss, and good power quality are required. To reduce the harmonics, one must solve the non-linear transcendental output equations of the cascaded H-bridge Multilevel inverter (CHB-MLI). Various Artificial Intelligent (AI) algorithms are introduced, and researchers have worked on eliminating harmonics or minimizing Total Harmonics Distortion (THD) from the output of CHB-MLI. This paper gives a review of the harmonic reduction using some of the well-known explored AI algorithms. It also provides insight into some of the unexplored algorithms in this area.

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GA Based Selective Harmonic Elimination for Multilevel Inverter with Reduced Number of Switches: An Experimental Study

Elektronika ir Elektrotechnika ◽

10.5755/j01.eie.25.3.23670 ◽

2019 ◽

Vol 25 (3) ◽

pp. 10-17

Author(s):

Enes Bektas ◽

Hulusi Karaca

Keyword(s):

Harmonic Distortion ◽

Multilevel Inverter ◽

Power Electronic ◽

Load Voltage ◽

Medium Voltage ◽

Multilevel Inverters ◽

Harmonic Elimination ◽

Selective Harmonic Elimination ◽

Power Switches ◽

First Time

In power electronic applications, especially high power and medium voltage, multilevel inverters (MLIs) have been commonly used. MLIs ensure high quality load voltage and lower Total Harmonic Distortion (THD) than traditional inverter. In this paper, a multilevel inverter structure with reduced number of power switches is proposed. The proposed multilevel inverter is lower costed than conventional MLI. Also, a Genetic Algorithm (GA) based Selective Harmonic Elimination (SHE) technique has been used for the first time in the proposed MLI structure with reduced number of switches. The proposed GA based SHE technique computes the optimum switching angles by solving nonlinear harmonic equations of multilevel inverter. Both Isochronous switching (IS) and SHE techniques have been applied to proposed MLI to demonstrate the effectiveness of the GA based SHE technique. Simulation and experimental results for 7, 11 and 13-level have been obtained. Results of 11-level inverter is analysed and given in detail. Results have clearly proved that desired order harmonics in proposed MLI topology can be eliminated by using GA based SHE technique and lower THD on the load voltage has been provided.

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Modelling and Analysis of Novel Topology for Multilevel Inverter With Reduce Number of Switches

International Journal of Engineering & Technology ◽

10.14419/ijet.v7i4.5.20111 ◽

2018 ◽

Vol 7 (4.5) ◽

pp. 379 ◽

Cited By ~ 1

Author(s):

Rohit Kumar ◽

Shimi S.L ◽

Shivendra Kaura

Keyword(s):

Renewable Energy ◽

Renewable Energy Sources ◽

Harmonic Distortion ◽

Multilevel Inverter ◽

Energy Sources ◽

Voltage Level ◽

Multilevel Inverters ◽

Harmonic Elimination ◽

Increasing Demand ◽

Inverter Topology

The demand of quality power is increasing continuously. The problem of global warming and rate of decrease of non-renewable energy sources are increasing day by day. Hence renewable energy sources such as fuel cell, solar, Magneto hydro Dynamic (MHD), geothermal are the best alternatives to solve the problem of environmental issue and increasing demand of energy. The output of these resources is dc, therefore to connect these resources to the grid, multilevel inverter is the key device. But the output of multilevel inverter has power quality issues such as harmonic generation and notching due to conversion of dc to ac and high number of switch. Hence, this paper deals with harmonic elimination using Genetic Algorithm based Selective Harmonic Elimination (GA-SHE) techniques for asymmetric and symmetric topology of MLI. In the present study, comparative study among the 5-level, 7-level, 9-level, 11-level and 15-level multilevel inverters with reduced number of switches topologies has been discussed. A novel topology of 15-level inverter which consists least number of switches has been designed for a desired voltage level. Also, the comparison of Total harmonic distortion developed in the output voltage generated by different topology at different levels with the proposed 15-level inverter topology are discussed.

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