A generic method to model CO2 emission performances of combined‐cycle power plants for environmental unit commitment

Abstract

This paper proposes a generic methodology for combined‐cycle gas turbine modeling. The main objectives are the estimation of the CO2 emissions for specific units and their integration in an environmental power dispatch that considers several plants. First, a design procedure aims at calibrating the model using the information available from the manufactures. Off‐design points are also investigated to estimate the CO2 emissions for the whole operating range of the units. The obtained CO2‐cost results show a good consistency with the emission coefficients found in the literature for that type of units. Then, those CO2 costs are used as input parameters for a unit commitment problem. Mixed‐integer linear programming formulation minimizes the global emissions for a set of different units on Jurong Island in Singapore. The grid‐emission factor obtained for the simulated network displays values close to the registered field data, which validates the developed model. Finally, a tightened formulation for the power‐dispatch problem is introduced. The objective is to reduce the computational time while guaranteeing good performance of the returned solutions.