Simulation and Optimization of Cogeneration Power Plant Operation Using an Energy Optimization Program

Abstract

The operation of a combined cycle cogeneration power plant system is complicated because of the complex interactions among components as well as the dynamic nature of the system. Studies of plant operation through experiments in such a sensitive facility are usually quite limited and expensive. Hence, a reliable model for the complicated plant system is desirable. The Energy Optimization Program (EOP, software developed by Sega, Inc.) was employed to simulate and optimize the operation of the Texas A&M University central power plant. A thorough investigation regarding many aspects of the program was performed and the necessary upgrades were incorporated to assure the program's proper functionality for its future application by real-time plant operation. First, the models for all major pieces of plant equipment were analyzed, verified, and in some cases, modified or rebuilt. New models were added to simulate the current plant configuration. Then the optimization algorithm was carefully studied and evaluated so that potential improvements could be made. Also, the program itself was modified including changes to the source code and interface enhancement to make it more user friendly. Finally, plant operational case studies were performed with the help of the modified simulation tool. A comprehensive understanding of the complicated interaction among all energy components within the plant system was achieved through systematic simulation using the program. Overall performance and the savings potential of the plant operation under different conditions were investigated with the program's optimization capability. Other interesting results, such as the impact of utility rates on operational decision making, were also obtained.