Determination of required instantaneous power reserve for power system inertia enhancement, based on the unit commitment

Abstract

The increase of renewable energy sources has favored the connection of new non-conventional generation technologies in electrical power systems. Many of these technologies are connected to the network by means of power electronics causing, among other problems, reduction of the inertia constant of the power system, to the detriment of frequency stability. There are different alternatives to improve the inertial response, but an instantaneous power reserve is always needed. The adequate instantaneous power reserve depends on the mix of dispatched generators. Thus, a flexible tool for determining the required instantaneous power reserve for the day-ahead operation is developed in this work. Obtained results show that the developed tool calculates the required power reserve with great accuracy and speed. Therefore, it serves as support for decision-making regarding instantaneous power reserve dispatch.