Abstract
System operators are concerned with the economics of power system operation as well as the amount of harmful gases released during power generation. The combined economic and emission dispatch (CEED) determines the power output of each online thermal unit for which the operational cost and emissions are at their minimum. It is a multi-objective optimization problem (MOOP) with equality and inequality constraints. In this paper, the epsilon-constraint method is used to tackle the CEED problem. The General Algebraic Modelling Systems (GAMS), known for its speed and ability to handle large and complex power system optimization problems is used to solve the problem formulation. A six-generator test system is taken as the case study in this paper, to verify the CEED mathematical formulation. In comparison with results in literature, the proposed solution method yields lower operational costs.