Investigation the effects of photovoltaic systems on electricity distribution networks and determining the optimum network structure

Distributed generation models have started to be seen intensively in distribution networks with technological developments. The increase in distributed generation resources has brought changes in the grid. Problems such as improper operation of grid protection systems and imbalances in load flow have emerged. In this article, short circuit and load flow analyses of a low voltage distribution network with a distributed generation source are performed and the effects on the network are predicted. Results and predictions regarding the optimum operating conditions of distribution networks in the presence of distributed generation resources have been obtained. Real-time analyses are performed with a power quality measurement device. Scenarios are created in different situations in the presence of distributed generation resources. These scenarios are analysed using a network simulation program. The simulation programme analysed the effects of seasonal conditions and changes in power generation and loads on distribution transformers. In the light of the data obtained, the changes that are required to be made in the inventories in the network topology considering the changes in energy generation time and voltage levels outside the energy generation time are specified. Applications such as automatic tap switching of distribution transformers after a certain power level are proposed.