Optimal droop parameter adjustments for an islanded micro-grid considering unexpected perturbation in load demand In the presence of energy storages

The growing need for islanded micro-grids has made the controlling strategies a critical requirement in micro-grid operation. The integration of renewable energy sources and the weak frequency response of the other types of distributed generators underlines the importance of a rigorous controlling technique. In this paper, the parameters of the well-known droop controlling method alongside the output power of the dispatchable units have been optimized in order to stabilize the frequency response of the micro-grid and minimize the cost of energy production. The proposed controlling strategy is formulated as an optimization model and is then implemented in a real-life micro-grid system considering common types of generation technologies. The General Algebraic Modelling System (GAMS) software has been employed to solve the optimization problem. The effects of the energy storage system and droop control technique is evaluated in the presence of unexpected load demand surges.