风光互补系统的最大功率研究

Maximum Power of Wind and Solar System

为了获得风光互补系统最大功率的目的,在此采用了极值搜索的基本方法。依据风机和光伏阵列具有相同的功率曲线,采用双乘法,根据导数的结果判断是否达到最大值。该算法基于扰动的基础上运用到最大功率跟踪系统。基于极值搜索法的最大功率跟踪控制的稳定性分析是为风光互补系统提供一个直流控制的转换器。运用Matlab进行仿真结果分析,获得了功率曲线图,证明采用极值搜索法,根据电压电流曲线图可以达到功率最大值。风光互补系统的最大功率跟踪控制的特点是稳态行为在最大功率点附近稳定地振荡。

The extremum search method is adopted to obtain the maximum power problem of wind and solar system. On the basis of same power curve of Wind turbine and photovoltaic array and using dual multiply, according to the results of de- rivative to determine whether the maximum. The stability analysis of extremum search method-based maximum power track- ing control can provide a convertor with DC control for wind and solar system. The power curve can be gained by Matlab simulation. It proves that the maximum power can be achieved according to the voltage and current curves by using extremum search method. The steady-state behavior of the wind and solar system with MPPT control is characterized by a stable oscilla- tion around the maximum power point.