Staff View: Ferroresonance in capacitive voltage transformer (CVT) due to breaker opening / Shakil Ahamed Khan

Ferroresonance in capacitive voltage transformer (CVT) due to breaker opening / Shakil Ahamed Khan

Ferroresonance incidences in electrical power system have been commonly regarded as unexplained phenomenon due to its relatively rare frequency of occurrence which is not critical by the utility engineers. As a result, research conducted in this area is limited and the awareness on ferroresonance is...

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Main Author:	Khan, Shakil Ahamed
Format:	Thesis
Published:	2015
Subjects:	TK Electrical engineering. Electronics Nuclear engineering
Online Access:	http://studentsrepo.um.edu.my/5801/1/HGF120006_DISSERTATION.pdf http://studentsrepo.um.edu.my/5801/
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id	my.um.stud.5801
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spelling	my.um.stud.58012015-07-29T04:52:52Z Ferroresonance in capacitive voltage transformer (CVT) due to breaker opening / Shakil Ahamed Khan Khan, Shakil Ahamed TK Electrical engineering. Electronics Nuclear engineering Ferroresonance incidences in electrical power system have been commonly regarded as unexplained phenomenon due to its relatively rare frequency of occurrence which is not critical by the utility engineers. As a result, research conducted in this area is limited and the awareness on ferroresonance is relatively low amongst the utility engineers. However, as the electrical system evolves, its complexity increases in line with the increasing risk of ferroresonance. Ferroresonance gained prominence only in the recent decade, when it has been reported to cause damaging consequences to power equipment. Several literatures had concerning reported practical encounters of ferroresonance which led to equipment failures and electrical blackout. It must be noted that most of the literatures concentrated on ferroresonance in power transformer only. In contrast, this research will place ferroresonance in capacitive voltage transformer (CVT) as the main focus. It is demonstrated in this research that ferroresonance can also occur in CVT due to circuit breaker switching. Various ferroresonance suppression techniques have since been proposed as ferroresonance mitigation solutions in CVT. This research presents a new technique for detection and mitigation of the ferroresonance phenomenon in CVT. In addition, the transient performance of CVT and ferroresonance mitigation performance with the proposed new technique is also compared with other existing ferroresonance suppression techniques. EMTP-RV simulation results demonstrate that, the transient response for a CVT with the proposed ferroresonance suppression circuit (FSC) is much better than conventional active and passive FSCs. The accuracy of the proposed ferroresonance detection and mitigation technique is verified through comparison of the laboratory test (Hardware-in-the-Loop (HIL) real-time simulations) results and with those obtained from EMTP-RV simulation results. Closed-loop testing is performed using real time digital simulator (RTDS). The experimental results demonstrate that the developed technique can accurately detect the phenomenon of ferroresonance in CVT and can suppress ferroresonance faster than other conventional techniques. 2015 Thesis NonPeerReviewed application/pdf http://studentsrepo.um.edu.my/5801/1/HGF120006_DISSERTATION.pdf Khan, Shakil Ahamed (2015) Ferroresonance in capacitive voltage transformer (CVT) due to breaker opening / Shakil Ahamed Khan. PhD thesis, University of Malaya. http://studentsrepo.um.edu.my/5801/
institution	Universiti Malaya
building	UM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Malaya
content_source	UM Student Repository
url_provider	http://studentsrepo.um.edu.my/
topic	TK Electrical engineering. Electronics Nuclear engineering
spellingShingle	TK Electrical engineering. Electronics Nuclear engineering Khan, Shakil Ahamed Ferroresonance in capacitive voltage transformer (CVT) due to breaker opening / Shakil Ahamed Khan
description	Ferroresonance incidences in electrical power system have been commonly regarded as unexplained phenomenon due to its relatively rare frequency of occurrence which is not critical by the utility engineers. As a result, research conducted in this area is limited and the awareness on ferroresonance is relatively low amongst the utility engineers. However, as the electrical system evolves, its complexity increases in line with the increasing risk of ferroresonance. Ferroresonance gained prominence only in the recent decade, when it has been reported to cause damaging consequences to power equipment. Several literatures had concerning reported practical encounters of ferroresonance which led to equipment failures and electrical blackout. It must be noted that most of the literatures concentrated on ferroresonance in power transformer only. In contrast, this research will place ferroresonance in capacitive voltage transformer (CVT) as the main focus. It is demonstrated in this research that ferroresonance can also occur in CVT due to circuit breaker switching. Various ferroresonance suppression techniques have since been proposed as ferroresonance mitigation solutions in CVT. This research presents a new technique for detection and mitigation of the ferroresonance phenomenon in CVT. In addition, the transient performance of CVT and ferroresonance mitigation performance with the proposed new technique is also compared with other existing ferroresonance suppression techniques. EMTP-RV simulation results demonstrate that, the transient response for a CVT with the proposed ferroresonance suppression circuit (FSC) is much better than conventional active and passive FSCs. The accuracy of the proposed ferroresonance detection and mitigation technique is verified through comparison of the laboratory test (Hardware-in-the-Loop (HIL) real-time simulations) results and with those obtained from EMTP-RV simulation results. Closed-loop testing is performed using real time digital simulator (RTDS). The experimental results demonstrate that the developed technique can accurately detect the phenomenon of ferroresonance in CVT and can suppress ferroresonance faster than other conventional techniques.
format	Thesis
author	Khan, Shakil Ahamed
author_facet	Khan, Shakil Ahamed
author_sort	Khan, Shakil Ahamed
title	Ferroresonance in capacitive voltage transformer (CVT) due to breaker opening / Shakil Ahamed Khan
title_short	Ferroresonance in capacitive voltage transformer (CVT) due to breaker opening / Shakil Ahamed Khan
title_full	Ferroresonance in capacitive voltage transformer (CVT) due to breaker opening / Shakil Ahamed Khan
title_fullStr	Ferroresonance in capacitive voltage transformer (CVT) due to breaker opening / Shakil Ahamed Khan
title_full_unstemmed	Ferroresonance in capacitive voltage transformer (CVT) due to breaker opening / Shakil Ahamed Khan
title_sort	ferroresonance in capacitive voltage transformer (cvt) due to breaker opening / shakil ahamed khan
publishDate	2015
url	http://studentsrepo.um.edu.my/5801/1/HGF120006_DISSERTATION.pdf http://studentsrepo.um.edu.my/5801/
_version_	1738505835762417664
score	13.211869

Ferroresonance in capacitive voltage transformer (CVT) due to breaker opening / Shakil Ahamed Khan

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