Modeling of Photovoltaic Power Station Considering the Geographic Factors

The impact that the photovoltaic (PV) power generation brings to the power system has become noticeable due to its increasing penetration. It is necessary to develop an accurate model of the PV power station for the related studies. However, in the existing electromechanical transient models, the geographic factors, that affect the solar irradiance and thus the output characteristics of the PV power station, have not been fully considered. Therefore, besides the basic factors, this paper takes into account the critical geographic factors to construct the electromechanical transient model of the PV power station. A calculation method of solar irradiance is designed by adding the longitude, latitude, and altitude factors. The PV power generation unit model, collector line and substation transformer models, and the plant-level control system are integrated to achieve the entire model. Finally, the proposed model is compared with the measured data and the existing model, through which the effectiveness is verified.