Elimination/Mitigation of Output Voltage Harmonics for Multilevel Converters Operated at Fundamental Switching Frequency using Matlab's Genetic Algorithm Optimization
Paper in proceeding, 2020

This paper deals with the optimization of the output voltage waveform of a multilevel converter operated with fundamental frequency switching. For a high number of output voltage levels, nearest-level control is typically used, whereas an optimized waveform can be presumably used to eliminate a selection of low order harmonics. A nonlinear optimization problem for any kind of multilevel inverter, operating in a single or three-phase arrangement, is formulated. It is shown that the set of nonlinear equations, defining this optimization problem, cannot be numerically solved, if the number of output voltage levels is higher than nine. Thus, an optimization algorithm, e.g., Matlab's genetic algorithm, should be used instead. Based on the concept of the weighted THD, it is shown that an optimized waveform has no effect on the output current's quality of a single phase multilevel converter. However, considering an ungrounded three-phase system, the content of the to be eliminated harmonic components is shifted towards the triplen harmonics and, consequently, the expected current quality, based on the WTHD, can be significantly improved.

Multilevel converter

IGBT

Multilevel system

Energy storage

Switching losses

Efficiency

Electric vehicle

MOSFET

Battery

H-bridge

Cascaded

Author

Anton Kersten

Chalmers, Electrical Engineering, Electric Power Engineering, Electrical Machines and Power Electronics

Manuel Kuder

Bundeswehr University Munich

Arthur Singer

STABL Energy GmbH

Weiji Han

Chalmers, Electrical Engineering, Systems and control, Automatic Control

Torbjörn Thiringer

Chalmers, Electrical Engineering, Electric Power Engineering, Electrical Machines and Power Electronics

Thomas Weyh

Bundeswehr University Munich

Richard Eckerle

Bundeswehr University Munich

2020 22nd European Conference on Power Electronics and Applications, EPE 2020 ECCE Europe

1-12 9215791

22nd European Conference on Power Electronics and Applications, EPE 2020 ECCE Europe
Lyon, France,

Loss and EMI reduction in electrified vehicle through the usage of a multilevel converter

Swedish Energy Agency (44807-1), 2017-07-01 -- 2021-12-31.

Areas of Advance

Transport

Energy

Subject Categories

Computational Mathematics

Vehicle Engineering

Electrical Engineering, Electronic Engineering, Information Engineering

Energy Systems

Control Engineering

Other Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.23919/EPE20ECCEEurope43536.2020.9215791

More information

Latest update

1/18/2022