Type of Document	Master's Thesis
Author	Plummer, Isaac
Author's Email Address	isaac_plumer@yahoo.com
URN	etd-04292011-090330
Title	Asymmetry in Distribution Systems:Causes, Harmful Effects and Remedies
Degree	Master of Science in Electrical Engineering (M.S.E.E.)
Department	Electrical & Computer Engineering
Advisory Committee	Advisor Name Title Czarnecki, Leszek Committee Chair Mehraeen, Shahab Committee Member Mendrela, Ernest Committee Member
Keywords	Power factor Generators Motors Transmission and Distribution Systems Adjustable Speed Drives Traction Systems Arc Furnace
Date of Defense	2011-04-26
Availability	unrestricted
Abstract ABSTRACT: Current and voltage asymmetry denigrates the power system performance. The current asymmetry reduces efficiency, productivity and profits at the generation, transmission and distribution of electric energy. Voltage asymmetry reduces efficiency, productivity and profits at the consumption/utilization level. There are a lot of conference and journal papers on the subject of voltage and current asymmetry, however, the information is scattered over a large number of journals and conferences and published over several years. Therefore, the thesis provides a comprehensive compilation of all possible published information on current and voltage asymmetry in the electrical power systems. Published information on sources of asymmetry, its propagation, negative effects upon transmission and customer equipment and possible remedies are compiled, discussed and analyzed in this thesis. This is done with respect to the voltage asymmetry and current asymmetry, as well as their mutual interaction. Some situations related to the voltage and current asymmetry are modeled in this thesis using the Electrical Transient Analyzer Program (ETAP) software. Due to the economics and efficiency of transmission, distribution and load diversity such as single-phase, two-phase and three-phase utilization, asymmetric current and voltage is an inherent feature in the distribution system. Therefore it has to be mitigated. The thesis discusses methods aimed at reducing the current and voltage asymmetry in the distribution system. Some of the sources of these methods are based on the Current Physical Component (CPC) power theory.
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