ACTIVE POWER ALLOCATION METHOD FOR DOUBLY FED WIND FARMS CONSIDERING FATIGUE LOAD

Wang Hanbo; Liu Yingming; Wang Xiaodong; Guo Guoxian; Wang Liming; Jing Hejun

doi:10.19912/j.0254-0096.tynxb.2024-0057

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (5) : 465-473. DOI: 10.19912/j.0254-0096.tynxb.2024-0057

ACTIVE POWER ALLOCATION METHOD FOR DOUBLY FED WIND FARMS CONSIDERING FATIGUE LOAD

Wang Hanbo¹, Liu Yingming¹, Wang Xiaodong¹, Guo Guoxian¹, Wang Liming¹, Jing Hejun²

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Abstract

The wind farm composed of doubly fed induction generator （DFIG-VSG） based on virtual synchronous generator control strategy （VSG） will exacerbate the main shaft （M_s） fatigue load of each DFIG-VSG in the wind farm when responding to changes in the grid power command value （P_grid）. The central controller of the wind farm can reasonably allocate P_grid to each DFIG-VSG in, which can reduce the Ms fatigue load of each DFIG-VSG in the wind farm while responding to P_grid changes. A wind farm active power allocation method that takes into account main shaft fatigue load is proposed for this purpose. Firstly, construct a discretized equation that quantifies the relationship between the active power command value of a single DFIG-VSG in the field and its main shaft torque （M_s__T）. Then, based on this discretization equation, the Ms of each DFIG-VSG minimized as the objective function and active power constraints are based on the operating status of P_grid and each DFIG-VSG. Finally, based on the fmincon function in the central controller, real-time allocation of active power command values required by each DFIG-VSG is performed. The simulation results have verified the effectiveness and superiority of the proposed allocation method.

Key words

wind farm / virtual synchronous generator / main shaft fatigue load / active power allocation method

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Wang Hanbo, Liu Yingming, Wang Xiaodong, Guo Guoxian, Wang Liming, Jing Hejun. ACTIVE POWER ALLOCATION METHOD FOR DOUBLY FED WIND FARMS CONSIDERING FATIGUE LOAD[J]. Acta Energiae Solaris Sinica. 2025, 46(5): 465-473 https://doi.org/10.19912/j.0254-0096.tynxb.2024-0057

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