Unbalance Voltage Compensation Using Power Electronics Interfaced DG

  • Author / Creator
  • With the increasing application of renewable energy systems, many Distributed Generation (DG) systems have been connected to power systems. Power electronic converters are usually used as effective interfaces of DG unit. These interfaces convert either DC or non-grid AC voltages of DGs to the grid compatible AC voltage. On the other hand, unbalanced voltage caused by local load adversely affects distribution network’s power quality. Therefore, operating DG unit under unbalanced voltage and using grid-interfacing converter to improve the grid’s power quality is becoming an important research topic This thesis first reviews grid-interfacing converter control methods that provide various flexible operations under unbalanced voltage. Furthermore, to reduce the impact on converter dc link due to unbalanced current injection, two DG control strategies for voltage unbalance compensation are proposed. Their validity was verified by Matlab/Simulink and a lab prototype.

  • 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)
    • Yunwei Li (Electrical and Computer Engineering)
  • Examining committee members and their departments
    • Yunwei Li (Electrical and Computer Engineering)
    • Qing Zhao(Electrical and Computer Engineering)
    • S. Ali Khajehoddin (Electrical and Computer Engineering)