Economical profits in medium voltage networks obtained by rearrangement of installed transformers

This paper presents a study on gains with relocation of medium voltage monophase transformers, based on load profile data measured for 69 transformers belonging to the electrical rural network of a Brazilian utility - AES Sul. The main purposes of this analysis are the verification of possible benefits to the distribution network and reduction of total loss by relocation of the transformers. The study was conducted considering comparisons among three groups. The first group is composed by the 69 transformers as they are installed on the power system. The second group uses the same 69 transformers, but they are rearranged and organized on the power system according to the pre-defined load conditions. The third group considers the organization of the transformers according to the load conditions and also allows the utilization of stored unities for rearrangement. The study was based on two methodologies: time supplying maximum power according to probability distributions and according to reference load profiles. It was achieved that the relocation is a reasonable procedure that contributes do increase the efficiency of distribution networks.