Assessment of System Frequency Support Effect of PMSG-WTG Using Torque-Limit-Based Inertial Control [electronic resource]

• Ngôn ngữ: eng
• Ký hiệu phân loại: 621.41 Applied physics
• Thông tin xuất bản: Washington, D.C. : Oak Ridge, Tenn. : United States. Dept. of Energy. Office of Energy Efficiency and Renewable Energy ; Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2017
• Mô tả vật lý: Size: p. 1-6 : , digital, PDF file.
• Bộ sưu tập: Metadata
• ID: 258281
• Chủ đề: 1. 17 wind energy; 2. 24 power transmission and distribution; 3. Inertial control; 4. Pmsg-wtg; 5. Torque limit

Tóm tắt

 To release the 'hidden inertia' of variable-speed wind turbines for temporary frequency support, a method of torque-limit-based inertial control is proposed in this paper. This method aims to improve the frequency support capability considering the maximum torque restriction of a permanent magnet synchronous generator. The advantages of the proposed method are improved frequency nadir (FN) in the event of an under-frequency disturbance
  and avoidance of over-deceleration and a second frequency dip during the inertial response. The system frequency response is different, with different slope values in the power-speed plane when the inertial response is performed. The proposed method is evaluated in a modified three-machine, nine-bus system. The simulation results show that there is a trade-off between the recovery time and FN, such that a gradual slope tends to improve the FN and restrict the rate of change of frequency aggressively while causing an extension of the recovery time. These results provide insight into how to properly design such kinds of inertial control strategies for practical applications.