改进的基于输出电流的光伏电池最大功率点跟踪策略

o modify the dynamic performance of the control method of photovoltaic maximum power point based on output parameters, this paper adopts two methods, which is to decrease the DC link capacitance and adopt the perturb & observe method with variable step. Contrary to the control method having to measure the input voltage and current, the method based on the output parameters need only one measurement. In addition, it is reasonable to measure the output current to decrease the error of the input power. It can economize the cost and raise the power density. The simulation and the experiment result verify the availability and correctness of the proposed method.