基于辐照量的光伏电站系统效率非稳态计算方法.

Based on the measured data, the influence of daily irradiation on the conversion efficiency of photovoltaic(PV) array, inverter efficiency and system efficiency of photovoltaic power station was systematically analyzed, and the factors affecting the system efficiency of photovoltaic power station were analyzed in combination with the structure of photovoltaic power station. A nonlinear model between the conversion efficiency of photovoltaic array, inverter efficiency and daily irradiation was established, and a non-stationary estimation method for the system efficiency of photovoltaic power station based on irradiation was proposed. The results show that the fluctuation of PV array conversion efficiency and inverter efficiency with daily irradiation leads to the change of PV power station system efficiency with daily irradiation. This method can be used to calculate the monthly or annual total power generation of the power station, and can more accurately calculate the system efficiency of the target power station and predict the power generation of the power station. It has a good application prospect in efficiency analysis, operation evaluation and other projects of photovoltaic power stations. [ABSTRACT FROM AUTHOR]