There are a lot of different efficiency photovoltaic cells, which are used in solar power plants. All of these different photovoltaic cells are affected by different environment conditions. Maximum power point tracking is the main way to increase solar power plant efficiency. Mostly systems of maximum power point tracking are slow or inaccurate, that means the system cannot stay in maximum power point in solar power plant. This is the main reason why mostly of solar power plants are working not efficiently. The use of real working solar power plant with aim to find more efficient control algorithms is very expensive and requires long development period. Mathematical modeling makes research and investigation faster. In this article a temperature changing block of photovoltaic module that can simulate temperature changing process for month or even a few years was proposed. This temperature block was used in a solar power plant model which was created in previous investigations. Now, solar power plant model has four structural blocks: solar irradiance block, temperature of photovoltaic module block, photovoltaic module block and controller block. IncCond algorithm is used for maximum power point tracking. Solar power plant model is implemented in Matlab/Simulink environment. This model enables to analyze solar power plant working efficiency, when there are no clouds and the temperature is changing or stays constant.

Article in: Lithuanian

Article published: 2015-07-13