Modeling of photovoltaic grid connected generation system based on parameter identification method

In order to ensure the accuracy of the output of the photovoltaic power generation system, the identification of the photovoltaic parameters is carried out. In photovoltaic power generation system, the analysis is made from two aspects: photovoltaic array and grid connected inverter. The key parameters affecting PV model output are found. Using the recursive least squares method to develop grid-connected PV system parameter identification, and use of photovoltaic measured data parameter identification photovoltaic cells and photovoltaic inverter. Then, a more accurate PV system parameters could be obtained. Finally get a set of more accurate parameters of photovoltaic power generation system. By comparing the analytical calculation, system identification simulation output and photovoltaic measured output, to verify the feasibility of photovoltaic power generation system parameters method and results, lay the foundation for further study on distribution network distributed PV connected to the distribution network problems.