新型海流能发电装置控制系统的研究

Study on Control System of New Type Power Generation Device for Marine Current Energy

基于MPPT(最大功率点跟踪)理论及CVT(恒压转换)法的新型海流能发电装置控制系统的设计,增加了直流总线端稳压控制及捕获最大功率控制,在Matlab内建立数学模型模拟发电机输入转速及海流速度,并在Simulink环境下进行仿真研究、系统搭建及编程。其仿真结果表明给定最大功率值与实际输出功率的比值基本不变,说明该系统能够实现对最大功率捕获,直流总线端电压基本稳定,验证了整个控制系统的设计合理性。进而搭建试验平台,对整个系统进行试验研究。根据实际记录数据拟合得到的曲线与理论曲线一致,且电压也在合理的波动范围。试验结果证明该控制系统正确,可进一步示范应用。

Based on the maximum power point tracking （ MPPT） theory and the constant voltage transform（ CVT） method, the control system for the new marine current power generation device was designed to increasethe maximum power capture control and voltage-stabilizing control in a DC circuit. A mathematical model wasbuilt in Matlab to simulate input speed and marine current speed of the generator, and simulation research, theestablishment of system, and programming were finished in Simulink environment. The result shows that the ratioof the actual output power to the maximum power is basically the same, then the system can achieved the maximumpower capture, and the DC bus back-end voltage is basically stable, which verifies the effectiveness of controlsystem design. Through the construction of the test platform, the power generation system is experimentallyresearched. The data fitting curve is consistent with the theoretical formula curve, and the voltage is also within areasonable fluctuation range. The test result proves that the control system is correct and can be further applied.