Renewable sources increase the self-sustainability of the electric power system in the event of a possible energy crisis in the production of electricity, which today is dependent on the supply of coal, gas and oil. In addition to the mentioned problems, when connecting distributed sources to the distributed network, there is a significant change in the technical properties of the distribution network and the appearance of problems that were not characteristic of these voltage levels until then. One of such problems is the occurrence of high voltages and overloads in distribution networks with high shares of distributed sources. In such conditions, the current methods of leading and managing the distribution network are no longer sufficient. In this paper, the impact of the connection of wind power plants and photovoltaic power plants on the operating conditions in the distribution network was investigated. The paper also proposed a model for optimal coordination of the production of working and idle power from distributed sources, which ensures normal operating conditions even with high shares of distributed sources in relation to local consumption.