Decision theory criteria for medium voltage cable sizing in presence of nonlinear loads

In designing a distribution system, engineers have to choose optimal solutions under environmental uncertainty; in most cases, among the uncertainties the ones deriving from the presence of nonlinear loads must be included. Under these conditions, the Decision Theory appears to be a valuable tool for solving distribution design problems. This paper considers three approaches based on the Decision Theory for the economical sizing of medium voltage distribution electrical lines under uncertainty, paying particular attention to harmonics due to nonlinear load presence. In the last part of the paper the implementation and practical application of the sizing procedures are discussed and compared in some case studies.