A new mathematical model for assessing optimization decisions of the loading factor flowing through substation transformers

The paper proposes a new mathematical model used to determine the optimum loading for power system substations equipped with only one transformer. Because of the cyclic way of the planning process, the capacity and density of electrical substations are influenced by the technological progress and previous adopted measures. Operations knowledge comes in handy in day by day activities but only strategic knowledge confers electric companies an edge. In comparison with the methods used until now, the proposed model takes into consideration aspects related to operation, monitoring and maintenance costs throughout the lifetime of transformers. The proposed model is applied to a 110 kV/MV transformer with different rated powers of 2.5, 16, 80, and 400 MVA considered for an electrical distribution grid. The goal is following tendencies instead of on-point.