Substations are the second step in power system after the power planning. Beginning with Substation, the distribution network will begin. Substation will distribute its power using feeders on distribution voltage 11KV.
Due to the increasing demands for electric energy and the increasing scarcity of available substation sites, the location and spacing of substations is becoming a major economic problem. Because of local geography and other conditions beyond control, it may be impractical to select the ideal substation size and spacing. Anyway, these factors should be known so that the ideal conditions may be approached as near as possible.
Our concern in this part is to find the number, the size and the way of distributing the substations on each planning area. The selection of these parameters is just an economic matter. We try to find the optimum number, size and spacing of substations to have minimum cost. We want to minimize the cost of substations and the cost of feeders.
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