Serially-Connected Compensator for Eliminating the Unbalanced Three-Phase Voltage Impact on Wind Turbine Generators: Preprint

Eduard Muljadi, Ziping Wu, Ping Hsu, Wenzhong Gao

Research output: Contribution to conferencePaper

Abstract

Untransposed transmission lines, unbalanced tap changer operations, and unbalanced loading in weak distribution lines can cause unbalanced-voltage conditions. The resulting unbalanced voltage at the point of interconnection affects proper gird integration and reduces the lifetime of wind turbines due to power oscillations, torque pulsations, mechanical stresses, energy losses, and uneven and overheating of the generator stator winding. This work investigates the dynamic impact of unbalanced voltage on the mechanical and electrical components of integrated Fatigue, Aerodynamics, Structures, and Turbulence (FAST) wind turbine generation systems (WTGs) of Type 1 (squirrel-cage induction generator) and Type 3 (doubly-fed induction generator). To alleviate this impact, a serially-connected compensator for a three-phase power line is proposed to balance the wind turbine-side voltage. Dynamic simulation studies are conducted in MATLAB/Simulink to compare the responses of these two types of wind turbine models under normal and unbalanced-voltage operation conditions and demonstrate the effectiveness of the proposed compensator.
Original languageAmerican English
Number of pages7
StatePublished - 2015
Event2015 IEEE Power and Energy Society General Meeting - Denver, Colorado
Duration: 26 Jul 201530 Jul 2015

Conference

Conference2015 IEEE Power and Energy Society General Meeting
CityDenver, Colorado
Period26/07/1530/07/15

NREL Publication Number

  • NREL/CP-5D00-63875

Keywords

  • doubly fed induction generators (DFIG)
  • fast model
  • National Renewable Energy Laboratory (NREL)
  • NREL
  • renewable energy (RE)
  • renewable generation
  • squirrel-cage induction generator
  • unbalanced
  • unsymmetrical
  • wind turbine

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