Loss-constrained economic power dispatch

A new P-dispatch module for the decomposed optimal power flow method is presented by which undesired increases in transmission losses are prevented via an additional constraint imposed upon the module. The constraint only requires the restriction of the final updates of the control variables and therefore neither destroys the form of optimisation equations nor requires extra considerable calculation time. However, it provides flexibility in the choice of handling either the minimum cost or the minimum loss problem. The effectiveness of the method is demonstrated by applying it to two sample networks