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直驱型海浪发电系统具有结构简单、安全性高、易于维护的特点。文中以直驱型永磁直线海浪发电机为研究对象,建立了永磁直线发电机的数学模型,推导了基于双自由度和单自由度控制模式的优化功率算法,提出了基于优化功率算法的发电机电磁力控制策略:以海浪的周期和幅值为输入信号,在线计算最优电磁力目标值;发电机电磁力控制采用dq同步旋转坐标下带前馈补偿的矢量解耦控制方法,实现了对永磁直线发电机的解耦控制,充分利用了发电机容量。搭建了基于MATLAB/Simulink的直驱型永磁直线海浪发电机模型,并对直驱型海浪发电的2种优化功率跟踪算法进行了仿真与对比分析,结果验证了模型的合理性及控制策略的有效性。
Direct-drive wave power generation system has the characteristics of simple structure, high safety and easy maintenance. In this paper, a direct-drive permanent magnet linear sea wave generator is taken as the research object, a mathematical model of the permanent magnet linear generator is established, and an optimized power algorithm based on a two-degree of freedom and a single-degree of freedom control mode is derived. Generator electromagnetic force control strategy: the cycle and amplitude of the waves as the input signal, the online calculation of optimal electromagnetic force target value; generator electromagnetic force control using dq synchronous rotary coordinates with feedforward compensation vector decoupling control method to achieve the Permanent magnet linear generator decoupling control, take full advantage of the generator capacity. The model of direct drive permanent magnet linear sea wave generator based on MATLAB / Simulink is set up, and two kinds of optimized power tracking algorithms of direct drive ocean wave power generation are simulated and compared. The results verify the rationality of the model and the control strategy Effectiveness.