An Improved Control Method for a DFIG in a Wind Turbine under an Unbalanced Grid Voltage Condition

作者：Lee Sol Bin; Lee Kyo Beum^*; Lee Dong Choon; Kim Jang Mok

来源：Journal of Electrical Engineering and Technology, 2010, 5(4): 614-622.

DOI：10.5370/JEET.2010.5.4.614

• Doubly fed induction generator
• Unbalanced disturbance
• Torque oscillation
• DC voltage ripple
• Power generation control
• Power theory

This paper presents a control method, which reduces the pulsating torque and DC voltage problems of a doubly fed induction generator (DFIG)-based wind turbine system. To reduce the torque and power ripple, a current control scheme consisting of a proportional integral (PI) controller is presented in a positive synchronously rotating reference frame, which is capable of providing precise current control for a rotor-side converter with separated positive and negative components. The power theory can reduce the oscillation of the DC-link voltage in the grid-side converter. In this paper, the generator model is examined, and simulation results are obtained with a 3 kW DFIG-based wind turbine system to verify the proposed control strategy.

• 出版日期2010-11