This paper addresses a novel security constrained energy management system of a microgrid which
considers the steady-state frequency. Microgrid frequency as a key control variable, continuously exposes
to be excursed of its nominal value due to unpredictable intermittencies arise from renewable sources
and/or load consumptions. Moreover, great utilization of inertia-less inverter-interfaced distributed
energy resources intensifies potential frequency excursions. As a result, energy and reserve resources
of a microgrid should be managed such that the microgrid frequency lies within secure margins. To that
end, a new objective function on the basis of the frequency dependent behavior of droop-controlled
distributed generations is formulated using a mixed integer linear programming. It is aimed to optimize
the microgrid frequency according to the economic and environmental policies. Besides, to seek the
active participation of the consumers into proposed frequency management approach, a linearized
ancillary service demand response program is also proposed. In addition, to properly model the impacts
of microgrid various uncertainties in the frequency management approach, a two-stage stochastic
optimization algorithm is employed. Simulations are performed in a typical microgrid which operates
in the islanded mode during a 24 h scheduling time horizon. The numerical results show the impressiveness
of the proposed frequency aware energy management system while concurrently managing the
microgrid security and economical aspects. Furthermore, it is demonstrated that utilization of demand
response programs economizes the microgrid frequency management approach