基于Matlab的光伏并网系统仿真研究

研究了一种单相光伏并网发电控制仿真系统。采用DC/DC和DC/AC两级拓扑结构对光伏并网系统进行了研究和设计;采用功率扰动法实现最大功率点闭环跟踪,并网控制通过采集电网电压参数和逆变输出电流参数在逆变电路中通过PI调节实现。采用基于Matlab的光伏电池仿真模型对所设计的光伏并网系统进行了仿真。仿真和实验结果表明,基于Matlab的光伏仿真模型能够有效地模拟实际光伏并网系统的行为特征性,证明此系统在实际中是可行的。

Simulation Research on Photovoltaic Grid-connected System based on Matlab

A simulation system for single-phase grid-connected PV powergeneration control is proposesed.DC/DC and DC/AC topological structures is adopted to study and design the PV grid-connected system.The closed-loop tracking for MPPT is realized with the improved P&Q tracking method,the grid—connected control is based on the acquisition of the grid voltage parameters,and the inverter output current parameters is achieved in the inverse circuit by using PI control. The PV grid-connected system is simulated with PV cell array model based on Matlab.The results of experimentation and simulation show that the PV model based on Matlab can effectively simulate the behavior characteristics of the actual PV grid-connected system and Matlab software can be used for PV power system simulation.