Abstract
The share of the dispersed energy production is supposed to increase in the next years in many countries up to 30%. Wind, PV, CHP, microturbines, fuel cells and also different kinds of energy storages are expected to be the future decentralised generation units. These units supply electrical energy at the low and medium voltage level which changes its functionality. A big amount of the locally generated energy is also consumed locally so the distribution network gets a local network character. There is not a lot of experience in the planning and operation of such local distribution systems. Some pilot projects in Europe like EDISon, or DisPower give the first practical information about the problems connected with the planning and operation of the electric networks with dispersed energy resources (DER). Also the CIGRE is working on these problems in the scope of the Scientific Committee SC6. In this paper a benchmark network proposal based on a European Project and the discussion in the scope of the CIGRE SC6 group is presented. The topology of the local distribution network and its parameters are presented. A methodology for the use of the proposed parameters and for the sensitivity analysis is given. Additionally some simulation examples for different local energy generation scenarios are presented. The paper shows that it is not trivial to create a universal benchmark for distribution systems with DER
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