Dynamic resource planning applied to distribution transformers

The large number of currently installed distribution transformers in Iberdrola-nearly 90,000 units-and the wide range of output rates, primary voltages, secondary voltages, types of dielectric, class of cover-passes, etc. into which these transformers can be subdivided, has to date made it very difficult to optimise the number of standby transformers and procurement of new units. This situation is further complicated by the large land area covered by the distribution grid /spl sim/28 provinces in Spain and nearly 50 stores. This paper describes how, with this background, a system to aid decision making in the assignment of transformers (SADMAT) has been drawn up which will help in the procurement of transformers from outside sources.