风光互补发电及MPPT控制系统研究

Research on Wind/Solar Hybrid Generation and MPPT Control System

论述了一种小型风光互补发电系统的组成及工作原理。基于发电系统硬件结构、MPPT控制中光伏侧最优电流给定和风电侧的爬山法,最终输出给定电压调节占空比;并网逆变器控制采用基于PI的PQ解耦重复控制算法。通过Matlab仿真表明,该风光互补发电系统系统波动小,动态响应速度快,稳态性高。

This paper studied the wind solar hybrid generation and summarized the composition and fundamental theory of a small size wind / solar hybrid generation system. It makes up of the hardware structure of power generation system,the wind / solar maximum power point tracing control and grid-connected inverters control.The wind power and coordinate transformation theory was also given. We adopt MPPT method of hill-climbing method was adopted and optimum current given in wind turbine and photovoltaic. Ultimatly,output voltage adjustment duty ratio was given. This paper applied the PQ uncoupled repeat control algorithm based on the PI in grid-connected inverters. The simulation by using the Matlab shows that the system has lower fluctuation,higher response speed and stability.