Optimal pulsewidth modulation (PWM) online control of a modular structured multilevel inverter (MSMI)

Author

Azli, N. Abmad ; Yatim, A. H Mohd

Author_Institution

Electr. Eng. Fac., Universiti Teknologi Malaysia, Malaysia

Volume

2

fYear

2001

fDate

22-25 Oct. 2001

Firstpage

598

Abstract

An inverter topology for high power applications that seems to be gaining interest lately is the modular structured multilevel inverter. (MSMI). The switching frequency constraint in a MSMI with high isolated DC voltages calls for a low switching frequency modulator such as the optimal PWM switching strategies. This paper presents a different approach in controlling a MSMI output voltage based on the optimal PWM switching strategies. For better output voltage magnitude control resolution, a curve fitting technique (CFT) for online computation of the optimal PWM switching angles is proposed. Focus is given on the CFT and the multilevel design aspect of the proposed control strategy for the MSMI. Simulation and experimental results of the MSMI operation are given to verify its performance.

Keywords

PWM invertors; curve fitting; optimal control; voltage control; curve fitting technique; high Isolated DC voltages; inverter topology; low switching frequency modulator; modular structured multilevel inverter; online computation; optimal PWM control; optimal PWM switching angles; optimal control; optimal pulsewidth modulation online control; output voltage magnitude control resolution; switching frequency constraint; Computational modeling; Curve fitting; Frequency modulation; Optimal control; Pulse inverters; Pulse width modulation; Pulse width modulation inverters; Switching frequency; Topology; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics and Drive Systems, 2001. Proceedings., 2001 4th IEEE International Conference on

Print_ISBN

0-7803-7233-6

Type

conf

DOI

10.1109/PEDS.2001.975386

Filename

975386