Inertia Constrained Economic Dispatch in a Renewable Dominated Power System

Abstract

The increasing incorporation of renewable energy into the electricity grid is making the grid vulnerable to any contingency as system inertia is decreasing gradually with the growing non-synchronous penetration. This growing proliferation of renewable energy challenges the secure operation of power system. This paper proposes an inertia constraint economic dispatch method which ensures the adequacy of minimum inertia at all dispatch periods. The proposed method protects the system during any contingency in terms of frequency stability. A significant improvement in system frequency nadir and RoCoF is shown, yet keeping enough headroom to provide primary frequency response to the system.