Multi-thread Security Constraint Economic Dispatch with Exact Loss Formulation

This paper proposes a new method for solving economic dispatch problems in electrical power systems through the application of multithread programming. Multi-Thread Interior Point Barrier Algorithm, an efficient quadratic programming algorithm, is used to solve economic dispatch problem. The barrier algorithm also caters for any combination of polynomial functions such as polynomial cost functions. Nonlinear characteristics of electrical power system such as generators limitations, transmission losses and nonlinear cost functions are considered in the economic dispatch formulation. Exact transmission loss formula is used in the equality constraint in the economic dispatch equations. The transmission loss coefficients are calculated by using a multi-thread programming. To ensure the optimal dispatch satisfies the line flow limits, line flow constraints has been added to formulation as a security constraint. This optimization problem enable us to solve economic dispatch problems faster, so it is suitable for unit commitment problems and the other power system problems which need to get reasonable speed. IEEE 30, 57, 118 bus case studies are presented and tested with the proposed method.