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This paper presents the main features and the use of the security constrained optimal power flow program, called IPSO (Integrated Power System Optimizer), in the electricity market environment. The finding of the optimal power flow solution is realized with the KNITRO solver developed at Ziena Optimization, Inc. The paper emphasizes the original features of IPSO software such as security constrained...
. An interior-point method for nonlinear programming is presented. It enjoys the flexibility of switching between a line search method that computes steps by factoring the primal-dual equations and a trust region method that uses a conjugate gradient iteration. Steps computed by direct factorization are always tried first, but if they are deemed ineffective, a trust region iteration that guarantees...
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