New approach for dynamic optimal power flow using Benders decomposition in a deregulated power market

This paper proposes a novel Benders decomposition model of DOPF and applies Linear programming (simplex) method to solve it. Transmission constraints may represent intra-utility flows in a GENCO. The inclusion of transmission security (i.e. network) constraints will assure a subsequent feasible solution for the DOPF problem. We decompose the problem into a base-case DOPF (without network constraints) and subproblems for checking the feasibility of the network constraints. For a given base-case DOPF schedule applied to the subproblems, we minimize line flow violations by adjusting phase shifters and generating units. In case the current mix of scheduled units cannot remove transmission violations, additional constraints will be introduced in the master problem for rescheduling DOPF. A case study shows that the proposed model and algorithm is simple, fast and optimal. (C) 2003 Elsevier Science B.V. All rights reserved.