Modeling and Control of Cogeneration Power Plants: A Hybrid System Approach
IEEE Transactions on Control Systems Technology , Volume 12 - Issue 5 p. 694- 705
In this paper the short term scheduling optimization of a combined cycle power plant is accomplished by exploiting hybrid systems, i.e. systems evolving according to continuous dynamics, discrete dynamics, and logic rules. Discrete features of a power plant are, for instance, the possibility of turning on/off the turbines, operating constraints like minimum up and down times and the different types of start up of the turbines. On the other hand, features with continuous dynamics are power and steam output, the corresponding fuel consumption, etc. The union of these properties characterize the hybrid behavior of a combined cycle power plant. In order to model both the continuous/discrete dynamics and the switching between different operating conditions we use the framework of Mixed Logic Dynamical systems. Then, we recast the economic optimization problem as a Model Predictive Control (MPC) problem, that allows us to optimize the plant operations by taking into account the time variability of both prices and electricity/steam demands. Because of the presence of integer variables, the MPC scheme is formulated as a mixed integer linear program that can be solved in an efficient way via dedicated software.
|combined cycle power plant, hybrid systems, mixed integer linear programming, model predictive control|
|ERIM Article Series (EAS)|
|IEEE Transactions on Control Systems Technology|
|Organisation||Erasmus Research Institute of Management|
Ferrari-Trecate, G, Gallestey, E, Letizia, P, Spedicato, M, Morari, M, & Antoine, M. (2004). Modeling and Control of Cogeneration Power Plants: A Hybrid System Approach. IEEE Transactions on Control Systems Technology, 12(5), 694–705. doi:10.1109/TCST.2004.826958