Novel control strategy for three-stage 18-level hybrid multilevel inverter

Kadir, M.N.A. and Mekhilef, Saad and Ping, H.W. (2009) Novel control strategy for three-stage 18-level hybrid multilevel inverter. In: Systems, Signals and Devices, 2009. SSD'09. 6th International Multi-Conference on.

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Abstract

This paper presents a multilevel multistage inverter design and its corresponding control strategy. The hybrid inverter has a high voltage stage composed of the six-switch conventional three phase inverter with its output connected in series with the outputs of three-level H-bridge medium and low voltage stages. The voltage ratio has been selected to enable both one state - approximation and PWM control modes effectively. The suggested control strategy has been developed to ensure minimum switching losses focusing on holding the higher voltage stage state as long as it is feasible. The reference voltage vector has been approximated to the nearest of the 919 vectors provided by the 18-level inverter. A special definition of state zone has been introduced for the low voltage stage to enable the achievement of the reference vector with minimum error. The proposed control strategy has been tested and its short computational time and low memory requirement has been proven.

Item Type:	Conference or Workshop Item (Paper)
Funders:	UNSPECIFIED
Additional Information:	Department Of Electrical Engineering, Faculty of Engineering Building, University of Malaya, 50603 Kuala Lumpur, MALAYSIA
Uncontrolled Keywords:	Converters, multilevel inverters, DSP, control, pulse width modulation
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions:	Faculty of Engineering
Depositing User:	Mr Jenal S
Date Deposited:	18 Feb 2013 01:47
Last Modified:	10 Oct 2019 02:54
URI:	http://eprints.um.edu.my/id/eprint/4855

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