中文摘要：

文章提出了一种全封闭双自由度的振荡浮子波浪发电系统。在分析其动力学特性基础上,采用一种变负载的最大功率点跟踪（MPPT）方法,实现了系统在波浪变频率条件下的最大发电控制;通过爬山法寻找到最优负载阻值,得到参考电流;通过控制开关管的导通与关断进行电流控制,使电机电流跟随给定电流值、电机输出平均功率达到最大值,实现系统的最大功率跟踪。仿真结果表明,该方法能够跟随波浪频率变化自适应调节等效负载,实现电机的最大功率输出。

英文摘要：

This article presents a fully enclosed double degrees of freedom oscillating buoy wave energy converter.Based on the dynamic characteristics of the converter,a variable load maximum power point tracking （MPPT） control strategy is proposed to extract the maximum power from the variable ocean wave environment.The optimal load resistance of the generator will be achieved through the hill climbing method.The current control,which is realized through the power switches off and on,is used to control the actual current of the generator to follow the given value.By this control,the output average power of the motor will reach the maximum value.The simulation results show that this strategy is able to adaptively adjust the value of load along with the change of wave frequency,and the maximum power output of the motor is achieved.