Two-area power system costing by the cumulant method using available capacity distribution

Abstract

This paper extends the cumulant method using available capacity distribution to evaluate the production costs of two-area power systems, in which the random characters of generating available capacity and the transmission capacity limit have been considered accurately. By means of the independence of both systems equivalent available capacity based on a chronological load curve, the single-variant cumulant and single-variant Gram-Charlier Series A approximation are adequate for the two-area production simulation. The method gives a new approach to stochastic production simulation for a two-area power system, and is easily extended to three-areas or multi-areas. Sample studies show favourable accuracy and efficiency results.