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Permanent link (DOI): https://doi.org/10.7939/R3WX07

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An Investigation of Power Quality Issues Associated With Shunt Capacitor Applications Open Access

Descriptions

Other title
Subject/Keyword
Power System
Capacitor
Switching Transients
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Tian, Yu
Supervisor and department
Xu, Wilsun (Electrical and Computer Engineering)
Examining committee member and department
Li, Yunwei (Electrical and Computer Engineering)
Dinavahi, Venkata (Electrical and Computer Engineering)
Xu, Wilsun (Electrical and Computer Engineering)
Department
Department of Electrical and Computer Engineering
Specialization
Energy Systems
Date accepted
2014-09-10T16:05:17Z
Graduation date
2014-11
Degree
Master of Science
Degree level
Master's
Abstract
Shunt capacitors are widely used in power systems for voltage support and reactive power compensation. Its applications, however, can also cause various problems. This thesis presents a comprehensive investigation of the power quality issues associated with shunt capacitor applications. Switching of shunt capacitors can cause severe transient overvoltage. This thesis first develops a frequency-domain method to simulate the transients. Then, the relationship between three-phase capacitor switching instants and transient voltage peak is analytically studied. The worst-case switching transient is determined accordingly through a systematic searching from a series of transient simulations. Finally, a transfer impedance ranking technique is proposed to effectively identify the most critical buses in capacitor switching. Additionally, shunt capacitors excite resonant conditions that can magnify harmonic levels. One detrimental consequence could be the overloading of capacitors. This thesis establishes a suite of indices that can effectively quantify capacitor loading condition and the impact of harmonics on capacitor loading.
Language
English
DOI
doi:10.7939/R3WX07
Rights
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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