فهرست نشریات علمی دسترسی آزاد ایران

One of the important issues in power system planning is distribution network expansion planning (DNEP). This planning is always done in two steps. In the first step, planning options are suggested by simple mathematical models, and in the second step, these proposed models are subjected to a more detailed analysis, including stability issues. In this paper, a bi-level model is proposed for the DNEP, which can simultaneously consider both steps. At the lower-level, which is the low-voltage network, the expansion planning is done, and at the upper-level, which is the medium-voltage distribution network, the voltage stability index (VSI) is checked. The factor that causes conflict between the two levels is the size and location of distribution transformers so each level tends to determine the location and size of transformers according to its desire. To show the efficiency of the proposed model, in three different scenarios by considering the uncertainty in load demand, the problem is solved and the necessary comparisons are made in this regard.