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Honey Badger Optimization based grid interactive asymmetrical cascaded MLI with minimum voltage distortion

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Abstract

The application of a newly available metaheuristic algorithm called the Honey Badger Optimization Algorithm for efficient power conversion is presented in this paper. HBA is used to determine the best switching angles for the asymmetrical Cascaded Multilevel Inverter in order to reduce the output voltage THD suitable for grid interconnection. In this study, a 9-level cascaded MLI with two unequal DC sources with voltage ratios of 1:3 is studied and tested for grid integration. The proposed use of unequal DC voltage sources has resulted in power device reduction. The HBA algorithm uses an efficient search approach that avoids confinement in the local region, resulting in faster convergence. For MLI operation, this nature-based switching technique avoids higher switching frequencies. The efficiency of the HBA algorithm has been determined across a wide range of modulation indices while meeting the IEEE-519 standard. To validate the productivity of the proposed algorithm, comparative study and statistical significance are presented. MATLAB simulation is used to validate the cascaded MLI with the proposed switching technique. To validate the simulation results, a 9-level MLI prototype is developed and successfully tested in the laboratory. The effectiveness of the HBA algorithm is also validated by connecting the MLI to the grid voltage using the OPALRT real-time simulator.

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Abbreviations

MLI level :

Output voltage level of Multilevel Inverter

N :

Number of DC voltage sources

V1, V2 :

Input DC voltages to the MLI

V D :

Reference voltage at each step

i :

Number of switching angles

n :

Number of odd harmonics present in the output voltage

V 1 :

Fundamental voltage

V n :

nth order harmonic voltage

MLI:

Multilevel Inverter

THD:

Total Harmonic Distortion

PWM:

Pulse Width Modulation

MI:

Modulation Index

HBA:

Honey Badger Algorithm

PSO:

Particle Swarm Optimization

GA:

Genetic Algorithm

a1, a2,..ai :

Switching Angles

S i :

Smell Intensity of honey badger

p i :

Current position of honey badger

p prey :

Location of prey

d i :

The distance between honey badger current location and location of prey

D f :

Density factor

itr max :

The maximum iteration

itr :

The current iteration count

F :

Fitness function

r1, r2,r3,r4,r5,r6 :

Random numbers used in HBA that lie between 0 and 1

p:

Probability value

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Correspondence to Rupali Mohanty.

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Mohanty, R., Chatterjee, D. & Suman, S. Honey Badger Optimization based grid interactive asymmetrical cascaded MLI with minimum voltage distortion. Evolving Systems 15, 321–333 (2024). https://doi.org/10.1007/s12530-023-09493-1

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  • DOI: https://doi.org/10.1007/s12530-023-09493-1

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