Title page for ETD etd-04292011-090330

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
  • Power factor
  • Generators
  • Motors
  • Transmission and Distribution Systems
  • Adjustable Speed Drives
  • Traction Systems
  • Arc Furnace
Date of Defense 2011-04-26
Availability unrestricted

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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