Methodologies for Planning Islanded Microgrids Considering Uncertainties
Probabilistic Optimal Power Flow; Unscented Transformation; Islanded Microgrids; Load Shedding Minimization; Uncertainties.
This work presents a probabilistic optimal power flow methodology for minimizing load shedding in islanded microgrids to meet frequency limits. The peculiarities of islanded microgrid operation are considered, such as frequency variation and droop control of generators. The solution is derived using the Unscented Transformation, which uses a reduced number of samples of the uncertain variables when compared to Monte Carlo Simulation. Results for 33-bus and 70-bus microgrids illustrate the computational effectiveness of the proposed methodology as well as the accuracy of the results, showing that the deterministic solution may not be efficient in the face of load uncertainties.