Impact of inertial response requirements on a multi area renewable network

Developments in renewable integration are continuously changing power system portfolios globally. Higher volatility of the networks might pose a threat to grid stability and thus increase the need for ancillary services. In this paper one such service - the provision of inertial frequency response (in short referred to as inertia) - is analyzed. An additional demand constraint is added to a SMIP (Stochastic Mixed Integer Problem) formulation of an interconnected two-area system consisting of wind, hydro and conventional thermal plants. Environmental stochastic influences - wind curtailment and hydrological inflow - as well as demand fluctuation, forecasting errors and inter-area congestion are incorporated. The potential of cross-border trade of inertial response such as the impact of inertia requirements on traditional scheduling is analyzed and discussed.