Mathematical model of photovoltaic inverters

This paper presents a mathematical multi-linear regression model of inverter in photovoltaic (PV) power plant. The model is based on the inverter efficiency and uses the input dc voltage and input dc power of the PV inverter as independent variables which could be calculated from the solar insolation and ambient temperature. The model is realized in Matlab environment. A model validation and adequacy analysis are made based on a comparison with real life PV power plant. The results witness high computational efficiency and good accuracy combined with high potential for further improvement.