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International Journal of Information Technology & Computer Science ( IJITCS )

Abstract :

Recently, the expectations of customers are to reduce the cost of electricity and to use quality and reliable electric energy. In this regard, renewable energy resources are the center of attraction in many respects. The integration of distributed generation (DG) plants which include some of the renewable energy resources such as solar power and wind power increases day by day. If the coordination issue of DG plants with distribution networks isn’t analysed correctly, these integrations can negatively affect the power quality of electric energy. The short-circuit analysis is one of the integration and coordination analyses. The short-circuit contribution of DG plants should be analysed and necessary protection measures should be taken. Impedance values are important parameter for short-circuit. Therefore, impedances of network equipments should be known to calculate correctly the shortcircuit current. In this paper, electrical system of Selçuk University Medical Faculty was modeled by using the commercial software PSCAD/EMTDC. 1 MW Photovoltaic (PV) power plant was used as a DG plant. The symmetrical and asymmetrical short-circuit analyses were mathematically calculated and simulated. The positive, negative and zero impedance values of the network were estimated by using Genetic Algorithm (GA). Obtained results were compared with each other. The impact of PV power plant on short circuit level was analyzed .

Keywords :

: Renewable energy, distributed generation, photovoltaic power plant, short-circuit, zero sequence, genetic algorithm .

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