IMPROVING THE QUALITY OF AN OPTIMAL POWER-FLOW SOLUTION BY TAGUCHI METHOD

This paper aims at improving the quality of an OFF (optimal power flow ) solution including power demand uncertainty. The goal is to obtain a best setting of the input which results in a performance characterist ic of the output close to target with minimum variability. Here, a pos t-optimality procedure which incorporates the philosophy and the metho d of Taguchi is applied. Power demand variability is included in the a nalysis by means of the expected value of a loss function which is est imated by the Taguchi orthogonal arrays approach. The best and least s ensitive solution over uncontrollable power system variability is sele cted by means of signal-to-noise ratios. The paper overviews the Taguc hi approach, and illustrates the application of the method to improve the 'quality' of an OPF involving the IEEE 14-bus network.