چكيده به لاتين
Nowadays, distributed generation (DG) sources development has increased in power systems in a competitive position among traditional sources as fossil fuels, especially in distribution networks. Power flow is transferred from high-voltage side to low-voltage side in traditional power system while power demand is provided by the DGs along with load density in modern power system configuration due to the reduction of losses and more reliable operation.
Hence, in the modern power system scheme, there is a key problem to answer this question how much energy should be produced by the DGs and where the location should be installed in order to achieve the desired goals. In this thesis, this issue is investigated and optimal size and location of the DGs are then determined to diminish losses in distribution networks. Two analytical methods are reviewed to obtain the size and location of the DGs in the optimal solution. In the first method, the dedication of resources is performed separately whilst in the second method, the dedication of DGs is applied simultaneously. Moreover, DGs is divided into three groups in a way that an optimum combination of different technologies is proposed to decrease the network losses. Since there is a relationship between the lines upgrade and less losses, the allocation of the DGs and the promotion of the lines are considered together. It is also evaluated the reduction amount of losses and required DGs power with respect to lines upgrade. As can be known, bus voltage is assumed to be constant in the allocation of the DGs, as a result, a proposed method is discussed in order to the dedication of the DGs. In practical networks, there are some limitations to DGs installation due to several reasons including the geographical location of the distribution networks. Consequently, some limitations are applied to a practical case study to allocate DGs and to check its installation constraints. In order to analyze the result, two standard networks of 33 and 69 buses are utilized.
