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

Författare

Anton Kersten

Chalmers, Elektroteknik, Elkraftteknik

Manuel Kuder

Universität Der Bundeswehr München

Arthur Singer

STABL Energy GmbH

Weiji Han

Chalmers, Elektroteknik, System- och reglerteknik

Torbjörn Thiringer

Chalmers, Elektroteknik, Elkraftteknik

Thomas Weyh

Universität Der Bundeswehr München

Richard Eckerle

Universität Der Bundeswehr München

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,

Förlust- och EMI-reduktion i elektrifierat fordon via användande av multinivåomriktare

Energimyndigheten (44807-1), 2017-07-01 -- 2021-12-31.

Styrkeområden

Transport

Energi

Ämneskategorier

Beräkningsmatematik

Farkostteknik

Elektroteknik och elektronik

Energisystem

Reglerteknik

Annan elektroteknik och elektronik

DOI

10.23919/EPE20ECCEEurope43536.2020.9215791

Mer information

Senast uppdaterat

2024-01-03