1. A Coordinated Control Method to Smooth Wind Power Fluctuations of a PMSG-Based WECS.
- Author
-
Uehara, Akie, Pratap, Alok, Goya, Tomonori, Senjyu, Tomonobu, Yona, Atsushi, Urasaki, Naomitsu, and Funabashi, Toshihisa
- Subjects
WIND power plants ,FLUCTUATIONS (Physics) ,WIND turbines ,ELECTRIC fault location ,WIND energy conversion systems ,PERMANENT magnet motors ,CAPACITORS - Abstract
This paper presents an output power smoothing method by a simple coordinated control of DC-link voltage and pitch angle of a wind energy conversion system (WECS) with a permanent magnet synchronous generator (PMSG). The WECS adopts an AC-DC-AC converter system with voltage-source converters (VSC). The DC-link voltage command is determined according to output power fluctuations of the PMSG. The output power fluctuationsin low- and high-frequency domains are smoothed by the pitch angle control of the WECS, and the DC-link voltage control, respectively. By using the proposed method, the wind turbine blade stress is mitigated as the pitch action in high-frequency domain is reduced. In addition, the DC-link capacitor size is reduced without the charge/discharge action in low-frequency domain. A chopper circuit is used in the DC-link circuit for stable operation of the WECS under-line fault. Effectiveness of the proposed method is verified by the numerical simulations. [ABSTRACT FROM AUTHOR]
- Published
- 2011
- Full Text
- View/download PDF