【摘要】 由于波浪的随机特性,采用传统PID控制器实现的波浪发电系统动态性能较差,无法快速实现最大功率捕获。为此,提出一种用于封闭型直驱式波浪发电系统的哈密顿建模方法和无源性控制方案,以保证系统在波浪随机变化过程中能快速实现最大功率捕获。首先建立了系统的动力学模型和直线发电机模型,通过哈密顿框架对系统模型进行重构。根据重构的哈密顿模型的结构特点,通过修改互联矩阵的方法,消除哈密顿模型中存在的强耦合。以系统的误差能量函数作为李雅普诺夫函数,使用李雅普诺夫稳定理论和注入阻尼的方法设计无源控制器。仿真对比结果表明,所设计的控制器能有效改善系统跟踪最大功率点过程中的动态性能和稳定性能。更多还原

【Abstract】 Due to the random characteristics of waves, the dynamic performance of the wave power generation system based on the traditional PID controller is poor and the maximum power capture cannot be realized quickly. In order to ensure that the system can quickly obtain the maximum power capture during the wave change process, this paper proposes the Hamiltonian modeling method and passivity-based control scheme for sealed-buoy direct-drive wave power generation system. Firstly, it establishes the dynamic model and the linear generator model of the system, and reconstructs the system model based on the Hamiltonian framework. According to the structural characteristics of the reconstructed Hamiltonian model, it elimilates the strong coupling existing in the model by modifying the interconnect matrix. Taking the error energy function as the Lyapunov function, it uses Lyapunov stability theory and the injection damping method to design the passivity-based controller. The simulation results show that the designed controller can effectively improve the dynamic performance and stability of the system in tracking the maximum power point.更多还原