Wave energy is known to be a promising energy source for the goal of environmental protection and reducing dependence on fossil fuel sources. Hydraulic power-take-off (HPTO) is a key technology of wave energy converters which determines the energy recovery efficiency of the whole system. This paper presents a novel control strategy for HPTO to enhance the regenerated power and energy efficiency by using a suitable configuration of a variable displacement hydraulic motor and a generator. A control management strategy was designed to adjust the tilt angle of the hydraulic motor and the generator resistance load to maintain them working in the highest performance area under variable wave conditions. To verify the proposed system, a simulation model was built in AMESim software based on the previous experiment test bench configuration. Simulation results showed that by applying the proposed strategy, the generated energy increased during the working process. Compared with other control methods, the improvement of energy generation efficiency of the proposed control management method was approximately 10% higher in the low and medium wave conditions.

众所周知，波浪能是一种有前景的能源，可实现环境保护和减少对化石燃料来源的依赖。液压取力器（HPTO）是波浪能转换器的一项关键技术，它决定了整个系统的能量回收效率。本文提出了一种新的 HPTO 控制策略，通过使用合适的可变排量液压马达和发电机的配置来提高再生功率和能源效率。设计了一种控制管理策略来调整液压马达的倾斜角和发电机电阻负载，以使其在可变波浪条件下保持在最高性能区域工作。为了验证所提出的系统，基于之前的实验测试台配置，在 AMESim 软件中建立了一个仿真模型。仿真结果表明，通过应用所提出的策略，在工作过程中产生的能量增加。与其他控制方法相比，所提出的控制管理方法在低中波条件下的发电效率提高约10%。