Dimensioning of distribution networks with dispersed energy resources

An increase of dispersed energy resources (DER) in the power system is expected within the next decade. Computations are necessary to find out the best proportion of dispersed generation to conventional power generation. This paper presents results of long-term-interval network simulations considering suitable models of DER. Problems of voltage control and stability level, overloading of devices and change of load flow direction are investigated, applying data of a test network. First, the philosophy of the modeling and the results of operation simulations in the test power system network are illustrated, and then network simulation results are discussed. Some critical cases are pinpointed and described.