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Improvement in Active Power Control Methods for a Wind Farm Based on Modified Wind Turbine Control in Danish Grid Codes

  • Sim, JunBo (Korea Electric Power Research Institute, Korea Electric Power Corporation) ;
  • Song, Il-Keun (Korea Electric Power Research Institute, Korea Electric Power Corporation) ;
  • Lee, Yongseung (Korea Electric Power Research Institute, Korea Electric Power Corporation) ;
  • Lee, Hak-Ju (Korea Electric Power Research Institute, Korea Electric Power Corporation) ;
  • Choi, Yun-Hyuk (School of electronic and electrical engineering, Daegu Catholic University)
  • Received : 2017.04.18
  • Accepted : 2018.02.11
  • Published : 2018.07.01

Abstract

The importance of power system stability has been emphasized with an increase of wind energy penetration in the power system. Accordingly, the guarantee on various control capabilities, including active and reactive power control of wind farms, was regarded as the most important aspect for the connection to the grid. To control the wind farm active power, the wind farm controller was introduced. The wind farm controller decides the power set points for each wind turbine generating unit and each wind turbine generating unit controls its power according to the set points from the wind farm controller. Therefore, co-relationship between wind farm controller and wind turbine controllers are significantly important. This paper proposes some control methods of wind farm active power control based on modified wind turbine control for power system stability and structures to connect wind turbine controllers to wind farm controller. Besides, this paper contributes to development of control algorithm considering not only electrical components but also mechanical components. The proposed contributions were verified by full simulation including power electronics and turbulent wind speed. The scenario refers to the active power control regulations of the Eltra and Elkraft system in Denmark.

Keywords

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