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Smart Grid or intelligent networks are the most frequently mentioned topic currently. We can say that research in this area is highly actual. This paper describes the impact of intelligent network elements on the part of a village or microgrid. The modell examines the effect of electric vehicle charging on the stability of distribution network operation. In addition to the chargers, the modell also features renewable sources, which are an inseparable part of the smart grid.

This article deals with the analysis of a day-ahead generation diagram in specific part of a power network with renewable energy sources. As a renewable energy source a photovoltaic power plant was chosen. Input data for a day-ahead analysis was obtained from the database of previous measurement that was realised on the existing configuration in off-grid network at the department of authors. The simulation network was created in Matlab/Simscape Power System environment that consisted of rotating generators (for regulation of generated power due to fluctuated power generation from photovoltaic sources) and photovoltaic power plant of variable energy generation and loads. The results refer to a necessity to consider the previous measured data of the weather for prediction of future expectation of a day-ahead load diagram.