AN EFFICIENT PREDICTOR-CORRECTOR INTERIOR-POINT ALGORITHM FOR SECURITY-CONSTRAINED ECONOMIC-DISPATCH

This paper deals with the application of an advanced interior point me thod to the Security-Constrained Economic Dispatch (SCED) problems thr ough successive linear programming. The nonlinear SCED problem is line arized, and then solved by a predictor-corrector interior point method . Besides describing the basic algorithm, the paper focuses on several important issues that are critical to its efficient implementation, i ncluding the adjustment of barrier parameter, the determination of ini tial point, and so on. Computational experiments are conducted to eval uate their impact on the performance of the algorithm. Some suggestion s, such as using feasibility condition to adjust the way of computing barrier parameter mu and customizing initial point by adopting a relat ive small threshold, are proposed to reduce the overall iterations req uired by the algorithm. The computational results on power systems of 236 to 2124 buses have shown that these suggestions are very effective , improving the performance of the algorithm by a factor of 2. Compari son with a pure primal-dual interior point method is also provided to demonstrate the superiority of the proposed predictor-corrector method .