Economic control for generation in thermal power systems

Abstract

This work is based on two proposed procedures for scheduling of generating units to obtain optimum economic dispatch with consideration of control over the generating units. Two mathematical models were built, taking the transmission losses into account. The steady state deviations in each model of frequency, mechanical power, electrical power and transmission losses in addition to outputs of generating units and the corresponding generation costs were analyzed, in each time interval, after the occurrence of the load change and damping of all synchronizing oscillations. The load change in each time interval has been taken, in the first model, as the difference between the value of the load in the present interval and its value in the previous one. In the second model it has been taken, optionally, as a certain specified constant value. Results were obtained for both models and have been compared with each other.