The medium-scale steam thermal power plants are used for insular power systems or smaller energy systems. Their performance depends on the thermodynamic cycle’s scheme and its parameters. Considering the complex effects on the performances of the steam cycle, the paper proposes a methodology for the simultaneous optimization of the reheat pressure and the preheating line, to maximize the net power. Out of the different configurations that are obtained, only some have the optimum according to the constraints. For the others, the maximum value from the acceptable interval is kept. A comparison between the different solutions has been made, the results being analyzed and explained.

Keywords: Power generation, Steam cycle, Reheat pressure, Preheating line, Optimization