An Investigation of Power Quality Issues Associated With Shunt Capacitor Applications

  • Author / Creator
    Tian, Yu
  • 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.

  • Subjects / Keywords
  • Graduation date
  • Type of Item
  • Degree
    Master of Science
  • DOI
  • License
    This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for non-commercial purposes. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.
  • Language
  • Institution
    University of Alberta
  • Degree level
  • Department
    • Department of Electrical and Computer Engineering
  • Specialization
    • Energy Systems
  • Supervisor / co-supervisor and their department(s)
    • Xu, Wilsun (Electrical and Computer Engineering)
  • Examining committee members and their departments
    • Xu, Wilsun (Electrical and Computer Engineering)
    • Dinavahi, Venkata (Electrical and Computer Engineering)
    • Li, Yunwei (Electrical and Computer Engineering)