Simplified model of photovoltaic modules using fuzzy interpolation considering intensity of solar radiation and temperature

摘要

The output power induced in the photovoltaic modules is influenced by intensity of irradiance and temperature of the solar modules. Therefore it is necessary to estimate the characteristics of PV modules precisely in order to construct a controller of model reference adaptive system and so on. This paper presents an approach to estimate the I-V curves of photovoltaic modules using fuzzy interpolation. The model is composed of data on short circuit current, open circuit voltage and voltage and current of maximum power point under conditions of several different temperatures and high level intensity of the sunshine. The curve fill factor of modules under the above-mentioned conditions can be use instead of maximum power point dates. The remarkable nonlinear curve between voltage and current of PV module is described by three approximating straight-lines employing fuzzy interpolation.