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Abstract. In this paper, economical and technical considerations of distributed generation units (DGU) will be presented in two steps. The first one analyses economic side of the distributed generation units. The calculation of total cost as well as the specific generation cost will be presented. The last newly defined parameter allows to compare different distributed generation units with their own and with traditional thermal power plants. In the second step, the technical restrictions like power stability or load flow will be considered. To do this, the model of a low voltage (LV) network has been created. The network has been divided into cluster, where DGU and loads are included. The DGU will be driven in two operating modes: firstly variable load according to the load curve and secondly with full load. Bringing these two models together the following conclusion will be drawn. The use of distributed generation units cannot be considered only from the technical point of view. The economic view plays also an important role.

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