Environmental-economic dispatch of power system based on frequency stability constraint

To ensure the stable operation of a power system, its frequency must remain within a safe region. Since frequency deviation is strongly affected by inertia, a minimum amount of inertia is vital to maintaining frequency stability. The generation dispatch problem not only finds a solution for generation that minimizes cost and emission but also one that ensures system stability. This paper addresses the environmental-economic generation dispatch of a power system while considering frequency stability in the optimization problem. The proposed frequency stability constraint is represented by the maximum system frequency deviation limit. A non-dominated sorting genetic algorithm II is implemented to investigate the multi-objective dispatch problem. Environmental-economic generation dispatch will be examined on the IEEE 30-bus system to demonstrate the proposed idea.