COORDINATED FREQUENCY CONTROL STRATEGY OF WIND POWER PUMPED STORAGE INTEGRATION SYSTEM FOR SOLVING SECONDARY FREQUENCY DROP

Luo Yuanxiang; Zhang Nan; Cai Linshu; Yan Qinyong

doi:10.19912/j.0254-0096.tynxb.2024-2446

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (8) : 727-736. DOI: 10.19912/j.0254-0096.tynxb.2024-2446

COORDINATED FREQUENCY CONTROL STRATEGY OF WIND POWER PUMPED STORAGE INTEGRATION SYSTEM FOR SOLVING SECONDARY FREQUENCY DROP

Luo Yuanxiang, Zhang Nan, Cai Linshu, Yan Qinyong

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Abstract

To address frequency drops under load disturbances in power systems with high renewable penetration, this paper proposes a coordinated frequency control strategy combining wind power and variable-speed pumped storage units. Firstly, a system frequency response model is developed, where sliding-mode predictive control enables both wind turbines and pumped storage units to support grid frequency regulation. Subsequently, a controlled rotor kinetic energy release scheme is introduced to manage the wind turbine’s inertial response. Furthermore, the wind turbine’s speed recovery curve is modulated by mapping the rotor kinetic energy variation to the power reference of the variable-speed pumped storage unit, establishing a coordination mechanism. This allows the fast secondary power response of the pumped storage unit to compensate the power deficit during wind turbine speed recovery, effectively mitigating secondary frequency drops that challenge conventional strategies. The proposed approach is validated via Matlab/Simulink simulations, demonstrating superior frequency regulation performance across scenarios, with eliminated secondary frequency drops and synchronous generator power oscillations.

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wind power / frequency response / energy storage / electric frequency control / renewable energy / pumped storage power plants

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Luo Yuanxiang, Zhang Nan, Cai Linshu, Yan Qinyong. COORDINATED FREQUENCY CONTROL STRATEGY OF WIND POWER PUMPED STORAGE INTEGRATION SYSTEM FOR SOLVING SECONDARY FREQUENCY DROP[J]. Acta Energiae Solaris Sinica. 2025, 46(8): 727-736 https://doi.org/10.19912/j.0254-0096.tynxb.2024-2446

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