Modelling and simulation of PWM switched autotransformer for voltage SAG mitigation using MATLAB/SIMULINK

For some decades, power quality did not cause any problem, because it had no effect on most of the loads connected to the electric distribution system. When an induction motor is subjected to voltage sag, the motor still operates but with a lower output until the sag ends. With the increased use of...

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Main Author:	Ahmad, Ismail
Format:	Thesis
Language:	English
Published:	2015
Subjects:	TK Electrical engineering Electronics Nuclear engineering
Online Access:	http://eprints.utm.my/id/eprint/48885/25/IsmailAhmadMFKE2015.pdf
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id	my-utm-ep.48885
record_format	uketd_dc
spelling	my-utm-ep.488852020-07-05T03:50:30Z Modelling and simulation of PWM switched autotransformer for voltage SAG mitigation using MATLAB/SIMULINK 2015-01 Ahmad, Ismail TK Electrical engineering. Electronics Nuclear engineering For some decades, power quality did not cause any problem, because it had no effect on most of the loads connected to the electric distribution system. When an induction motor is subjected to voltage sag, the motor still operates but with a lower output until the sag ends. With the increased use of sophisticated electronics, high efficiency variable speed drive, and power electronic controller, power quality has become an increasing concern to utilities and customers. Voltage sags is the most common type of power quality disturbance in the distribution system. It can be caused by fault in the electrical network or by the starting of a large induction motor. Although the electric utilities have made a substantial amount of investment to improve the reliability of the network, they cannot control the external factor that causes the fault, such as lightning or accumulation of salt at a transmission tower located near to sea. Custom power device like Dynamic voltage restorer and STATCOM are normally employed as a solution for mitigation of voltage sag. This project presents modelling and analysis of PWM switched autotransformer as a mitigating device for voltage sag disturbances. The proposed system has less number of switching devices and has good compensating capability in comparison to commonly used compensators. Simulation analysis of three-phase compensator is perfomed in MATLAB/SIMULINK software. Simulation results are presented for various conditions of faults and also the comparison result with and without of the PWM switched autotransformer. 2015-01 Thesis http://eprints.utm.my/id/eprint/48885/ http://eprints.utm.my/id/eprint/48885/25/IsmailAhmadMFKE2015.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:86760 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 Ahmad, Ismail Modelling and simulation of PWM switched autotransformer for voltage SAG mitigation using MATLAB/SIMULINK
description	For some decades, power quality did not cause any problem, because it had no effect on most of the loads connected to the electric distribution system. When an induction motor is subjected to voltage sag, the motor still operates but with a lower output until the sag ends. With the increased use of sophisticated electronics, high efficiency variable speed drive, and power electronic controller, power quality has become an increasing concern to utilities and customers. Voltage sags is the most common type of power quality disturbance in the distribution system. It can be caused by fault in the electrical network or by the starting of a large induction motor. Although the electric utilities have made a substantial amount of investment to improve the reliability of the network, they cannot control the external factor that causes the fault, such as lightning or accumulation of salt at a transmission tower located near to sea. Custom power device like Dynamic voltage restorer and STATCOM are normally employed as a solution for mitigation of voltage sag. This project presents modelling and analysis of PWM switched autotransformer as a mitigating device for voltage sag disturbances. The proposed system has less number of switching devices and has good compensating capability in comparison to commonly used compensators. Simulation analysis of three-phase compensator is perfomed in MATLAB/SIMULINK software. Simulation results are presented for various conditions of faults and also the comparison result with and without of the PWM switched autotransformer.
format	Thesis
qualification_level	Master's degree
author	Ahmad, Ismail
author_facet	Ahmad, Ismail
author_sort	Ahmad, Ismail
title	Modelling and simulation of PWM switched autotransformer for voltage SAG mitigation using MATLAB/SIMULINK
title_short	Modelling and simulation of PWM switched autotransformer for voltage SAG mitigation using MATLAB/SIMULINK
title_full	Modelling and simulation of PWM switched autotransformer for voltage SAG mitigation using MATLAB/SIMULINK
title_fullStr	Modelling and simulation of PWM switched autotransformer for voltage SAG mitigation using MATLAB/SIMULINK
title_full_unstemmed	Modelling and simulation of PWM switched autotransformer for voltage SAG mitigation using MATLAB/SIMULINK
title_sort	modelling and simulation of pwm switched autotransformer for voltage sag mitigation using matlab/simulink
granting_institution	Universiti Teknologi Malaysia, Faculty of Electrical Engineering
granting_department	Faculty of Electrical Engineering
publishDate	2015
url	http://eprints.utm.my/id/eprint/48885/25/IsmailAhmadMFKE2015.pdf
_version_	1747817495533715456

Modelling and simulation of PWM switched autotransformer for voltage SAG mitigation using MATLAB/SIMULINK

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