A modified method for solving the economic dispatching problem

A method is developed for solving the economic dispatching problem by changing it from constrained nonlinear programming problem to a sequence of constrained linear programming problems. The formulation of the load scheduling is exact in the sense that all the system voltages, active and reactive generation, as well as the phase angles are considered as independent variables. In addition, the effect of bus voltages on the loads is taken into consideration. Also any type of load can be included in the system constraints without altering the solution. The feasibility of the technique is demonstrated by means of a sample system.