高级检索

基于神经网络-模糊逻辑的风电机组自适应独立变桨控制策略

Adaptive individual pitch control strategy for wind turbines based on neural network and fuzzy logic

  • 摘要: 针对已有的风电机组独立变桨控制策略在大范围工况变化下自适应能力有限、难以持续有效抑制叶片不平衡载荷的问题,提出一种融合BP神经网络(back propagation neural network,BPNN)与模糊逻辑的风电机组自适应独立变桨控制策略。首先,采用麻雀搜索算法(sparrow search algorithm,SSA)对独立变桨PI控制器参数进行以降低载荷与平稳功率为目标的离线多目标优化;然后,利用优化数据训练BP神经网络,构建基于风速信息的前馈层以实现参数基准值的自适应设定;同时,设计以实时载荷信息为输入的模糊逻辑反馈层进行参数在线微调。最后,基于OpenFAST-MATLAB/Simulink的风电机组联合仿真平台,对不同湍流强度的湍流风等典型工况进行仿真。结果表明,与已有模糊PI控制策略对比,所提策略对于大范围变化工况具有更好的适应性,其通过前馈与反馈的协同机制,能够降低叶片等效损伤载荷4.65%,且能够一定程度减小输出功率波动。

     

    Abstract: Existing individual pitch control (IPC) strategies for wind turbines exhibit limited adaptability under wide-range operating condition variations and struggle to consistently and effectively suppress unbalanced blade loads. To address this issue, this paper proposes an adaptive IPC strategy that integrates a Back Propagation Neural Network (BPNN) and fuzzy logic. First, the Sparrow Search Algorithm (SSA) is employed to conduct offline multi-objective optimization of the IPC PI controller parameters, with the goals of reducing loads and stabilizing power output. Subsequently, the optimization data are used to train a BPNN to construct a wind-speed-information-based feedforward layer, enabling the adaptive setting of parameter baseline values. Concurrently, a fuzzy logic feedback layer, which takes real-time load information as input, is designed for online fine-tuning of the parameters. Finally, simulation studies based on an OpenFAST-MATLAB/Simulink co-simulation platform for wind turbines are conducted under typical conditions such as turbulent wind with varying turbulence intensities. The results demonstrate that, compared with existing fuzzy-PI control strategies, the proposed strategy shows superior adaptability to wide-range varying conditions. Through the synergistic mechanism of its feedforward and feedback layers, it effectively reduces blade damage-equivalent loads and also mitigates output power fluctuations to a certain extent.

     

/

返回文章
返回