Renewable sources and operation of distribution network

Knowledge of the actual behavior and characteristics of photovoltaic plants (PVP) scattered in a larger area is important in terms of the size of the total power supplied to the network (in terms of crowding out other types of nonrenewable resources due to preferential purchase) as well as the changes that affect the necessary support services and demands on the regulatory capacity of PVP. As for the support services influenced by the character of PVP production there is important not only the value but also the rate of change of power output. The paper contains an analysis, based on data from PVP and wind power plants (WPP) in operation connected to the distribution network in the territory of the Czech Republic with the installed capacity of about 2000 MW; summer minimum load of ES in the Czech Republic is less than 5000 MW.