Primary Frequency Regulation Strategy Based on Rotor Kinetic Energy of Double-Fed Induction Generator and Supercapacitor

Renting Ma, Shitong Yuan, Xianwei Li, Shuying Guan (), Xiangwu Yan and Jiaoxin Jia
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Renting Ma: Central South Electric Power Test and Research Institute, China Datang Corporation Science and Technology Research Institute, Zhengzhou 450007, China
Shitong Yuan: Central South Electric Power Test and Research Institute, China Datang Corporation Science and Technology Research Institute, Zhengzhou 450007, China
Xianwei Li: Central South Electric Power Test and Research Institute, China Datang Corporation Science and Technology Research Institute, Zhengzhou 450007, China
Shuying Guan: Hebei Key Laboratory of Distributed Energy Storage and Microgrid, North China Electric Power University, Baoding 071000, China
Xiangwu Yan: Hebei Key Laboratory of Distributed Energy Storage and Microgrid, North China Electric Power University, Baoding 071000, China
Jiaoxin Jia: Hebei Key Laboratory of Distributed Energy Storage and Microgrid, North China Electric Power University, Baoding 071000, China

Energies, 2024, vol. 17, issue 2, 1-16

Abstract: To address the challenge of wind turbines meeting primary frequency regulation requirements, incorporating energy storage devices to handle most of the frequency regulation tasks would result in increased operational costs. When a wind turbine rotor accelerates, it deviates from the maximum power tracking point (MPPT), leading to reduced output while retaining significant rotational kinetic energy. Based on this characteristic, a primary frequency regulation strategy is proposed that coordinates the rotor kinetic energy of a double-fed induction generator (DFIG) with supercapacitors (SCs). Supercapacitors provide power support during low-frequency conditions, while accelerating the wind turbine rotor reduces output during high-frequency conditions. Additionally, continuous attention is given to subsequent frequency changes. In case of short-term, low-frequency conditions, stored kinetic energy is released for power support, establishing a mechanism for wind turbine kinetic energy recovery and release. This mechanism reduces charging and discharging requirements for supercapacitors, extends their service life, and considers both wind turbine frequency regulation requirements and economy. Finally, using MATLAB 2020/Simulink platform allows for the verification of the effectiveness and rationality of this proposed method.

Keywords: DFIG; SC; primary frequency regulation; logistic function (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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