Sliding mode control for DC-AC converter

The aim of this study is to design a sliding mode controller (SMC) for DC-AC converter to track the desired AC voltage under load variation. In order to design the controller, a set of differential equations describing the plant need to be established to obtain state-space equation of the system. Th...

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Main Author:	Izadifar, Pouya
Format:	Thesis
Language:	English
Published:	2012
Subjects:	TK Electrical engineering Electronics Nuclear engineering
Online Access:	http://eprints.utm.my/id/eprint/32516/5/PouyaIzadifarMFKE2012.pdf
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id	my-utm-ep.32516
record_format	uketd_dc
spelling	my-utm-ep.325162017-09-25T07:15:17Z Sliding mode control for DC-AC converter 2012-06 Izadifar, Pouya TK Electrical engineering. Electronics Nuclear engineering The aim of this study is to design a sliding mode controller (SMC) for DC-AC converter to track the desired AC voltage under load variation. In order to design the controller, a set of differential equations describing the plant need to be established to obtain state-space equation of the system. The state variables of the control system are the variables which come from the energy storage elements, such as the inductor current or capacitor voltage. In converters, the level of current is a function of load and most of the time is nonlinear. The suggested controller does not need current sensors and only the desired AC voltage is used as reference. Variation of resistive load is considered as uncertainty and it causes that system to become unstable, so that output voltage has not the ability to track reference sinusoidal voltage. The effect of load changing on the system is compensated effectively by SMC. Two indices are considered for measuring the existing error between output and reference voltage which are integral of absolute error (IAE) and integral of total control power (ITCP). Also, two gains from SMC are optimized by using GA optimization technique in order to minimize the error. Finally, the results are compared with existing PID controller which is implemented to the system. From simulation, it is observed that SMC is more robust, fast and stable against perturbations in contrast to PID controller in DC-AC converter. 2012-06 Thesis http://eprints.utm.my/id/eprint/32516/ http://eprints.utm.my/id/eprint/32516/5/PouyaIzadifarMFKE2012.pdf application/pdf en public masters Universiti Teknologi Malaysia, Faculty of Electrical Engineering Faculty of Electrical Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TK Electrical engineering Electronics Nuclear engineering
spellingShingle	TK Electrical engineering Electronics Nuclear engineering Izadifar, Pouya Sliding mode control for DC-AC converter
description	The aim of this study is to design a sliding mode controller (SMC) for DC-AC converter to track the desired AC voltage under load variation. In order to design the controller, a set of differential equations describing the plant need to be established to obtain state-space equation of the system. The state variables of the control system are the variables which come from the energy storage elements, such as the inductor current or capacitor voltage. In converters, the level of current is a function of load and most of the time is nonlinear. The suggested controller does not need current sensors and only the desired AC voltage is used as reference. Variation of resistive load is considered as uncertainty and it causes that system to become unstable, so that output voltage has not the ability to track reference sinusoidal voltage. The effect of load changing on the system is compensated effectively by SMC. Two indices are considered for measuring the existing error between output and reference voltage which are integral of absolute error (IAE) and integral of total control power (ITCP). Also, two gains from SMC are optimized by using GA optimization technique in order to minimize the error. Finally, the results are compared with existing PID controller which is implemented to the system. From simulation, it is observed that SMC is more robust, fast and stable against perturbations in contrast to PID controller in DC-AC converter.
format	Thesis
qualification_level	Master's degree
author	Izadifar, Pouya
author_facet	Izadifar, Pouya
author_sort	Izadifar, Pouya
title	Sliding mode control for DC-AC converter
title_short	Sliding mode control for DC-AC converter
title_full	Sliding mode control for DC-AC converter
title_fullStr	Sliding mode control for DC-AC converter
title_full_unstemmed	Sliding mode control for DC-AC converter
title_sort	sliding mode control for dc-ac converter
granting_institution	Universiti Teknologi Malaysia, Faculty of Electrical Engineering
granting_department	Faculty of Electrical Engineering
publishDate	2012
url	http://eprints.utm.my/id/eprint/32516/5/PouyaIzadifarMFKE2012.pdf
_version_	1747816021125758976

Sliding mode control for DC-AC converter

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