基于WFT的直驱式波浪能发电系统自抗扰功率优化控制

Optimal power control of active disturbance rejection for direct drive wave power generation system based on WFT

实际输入海浪的不确定性,导致直驱式波浪能发电系统工作环境中的噪音点多,传统控制策略控制效果不佳,输出功率低。文章通过分析水动力结构模型与直线电机模型,构建了等效电路;采用加窗傅里叶变换离散化不规则激励,获取频域主导激励分量及波浪能发电系统最大功率捕获条件,以确定最佳电磁力;基于d,q轴电流环矢量控制模型,设计了自抗扰控制方案,降低了激励输入噪音的影响,保证了电流跟踪效果。仿真结果表明,自抗扰控制策略的跟踪效果与滤波效果较好,抗干扰能力较强,系统功率输出优化效果明显,鲁棒性强。

The uncertainty of the actual input waves causes many noise points in the working environment of the direct-drive wave energy power generation system,and the traditional control strategy has poor control effect and low output power.The article constructs an equivalent circuit by analyzing the hydrodynamic structure model and the linear motor model;Using windowed Fourier transform to discretize the irregular excitation,obtain the dominant excitation component in the frequency domain and the maximum power capture condition of the wave energy power generation system to determine the optimal Good electromagnetic force.Based on the dq axis current loop vector control model,an active disturbance rejection control scheme is designed to reduce the influence of excitation input noise and ensure the current tracking effect.The simulation results show that the tracking effect and filtering effect of the proposed auto-disturbance control strategy are better,the anti-interference ability is stronger,the system power output optimization effect is obvious and the robustness is strong.