Photovoltaic power generation system output power modeling and estimation method

Abstract

The invention discloses a photovoltaic power generation system output power modeling and estimation method. The photovoltaic power generation system output power modeling method comprises the steps of establishing a photovoltaic module current-voltage characteristic model according to a solar cell current-voltage characteristic model, simplifying the photovoltaic module current-voltage characteristic model, and establishing a photovoltaic power generation system output power model according to the simplified photovoltaic module current-voltage characteristic model. The photovoltaic power generation system output power estimation method comprises the steps of establishing the photovoltaic power generation system output power model, acquiring characteristic parameters under photovoltaic module standard test conditions, obtaining parameters in the output power model, obtaining original meteorological parameters, correcting the meteorological parameters into photovoltaic module actual operating temperature and absorbed effective irradiation, and inputting the corrected meteorological parameters to the model to obtain photovoltaic module output power. By means of the photovoltaic power generation system output power modeling and estimation method, accurate estimation of output power of a photovoltaic power generation system can be realized, power station designers can be helped to carry out benefit analysis, and prediction of the output power of the photovoltaic power generation system is realized.

Description

technical field

[0001] The invention relates to the field of photovoltaic power generation, in particular to a method for modeling and estimating output power of a photovoltaic power generation system. Background technique

[0002] The power generation of photovoltaic power generation systems is greatly affected by meteorological factors, especially by solar irradiance and ambient temperature. In recent years, the total amount of photovoltaic power plants installed in China has increased year by year. When weather conditions change drastically, large-scale installations of photovoltaic power plants will seriously affect the stability of the power grid and reduce power quality. In addition, for photovoltaic power generation system designers, it is particularly important to pre-estimate the power generation of the power station to be built. Therefore, it has become more and more important to establish an accurate photovoltaic power generation system output power model and acc...

Images