基于能量转换的光伏系统MPPT控制算法比较

In the future, solar energy will be a very important energy source. Several studies suppose that more than 45% of the energy in the world will be generated by photovoltaic array. However, the cost and performance of PV systems have limited its application. In order to improve the performance and get the maximum energy output, it is important to note that the output characteristic of a photovoltaic array is nonlinear and changes with solar irradiation and cell's temperature. The Maximum Power Point Tracking (MPPT) technique has become an essential part of PV systems. Accord to the experiments and computer simulation, and based on the energy utilization, this paper presents a comparative study of four widely-adopted MPPT algorithms, there are CV, IC, P&O. In particular, this study compares the behaviors of each technique in presence of solar irradiation variations. And determine the best MPPT Control Algorithms, with the controller prices fell, the variable step size P&O algorithm will become preferred method.