A Wind-Storage Combined Frequency Regulation Control Strategy Based on Improved Torque Limit Control

Benxi Hu, Fei Tang, Dichen Liu, Yu Li and Xiaoqing Wei
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Benxi Hu: School of Electrical Engineering and Automation, Wuhan University, Wuhan 430072, China
Fei Tang: School of Electrical Engineering and Automation, Wuhan University, Wuhan 430072, China
Dichen Liu: School of Electrical Engineering and Automation, Wuhan University, Wuhan 430072, China
Yu Li: School of Electrical Engineering and Automation, Wuhan University, Wuhan 430072, China
Xiaoqing Wei: School of Electrical Engineering and Automation, Wuhan University, Wuhan 430072, China

Sustainability, 2021, vol. 13, issue 7, 1-19

Abstract: The doubly-fed induction generator (DFIG) uses the rotor’s kinetic energy to provide inertial response for the power system. On this basis, this paper proposes an improved torque limit control (ITLC) strategy for the purpose of exploiting the potential of DFIGs’ inertial response. It includes the deceleration phase and acceleration phase. To shorten the recovery time of the rotor speed and avoid the second frequency drop (SFD), a small-scale battery energy storage system (BESS) is utilized by the wind-storage combined control strategy. During the acceleration phase of DFIG, the BESS adaptively adjusts its output according to its state of charge (SOC) and the real-time output of the DFIG. The simulation results prove that the system frequency response can be significantly improved through ITLC and the wind-storage combined control under different wind speeds and different wind power penetration rates.

Keywords: battery energy storage system (BESS); doubly fed induction generator (DFIG); frequency control; inertial response (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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