Optimal Reactive Power Control in a Microgrid Considering Distributed Generations and Uncertainty of Wind Farms

Due to the rapid growth of utilization of Distributed Generations (DGs) in microgrids, their different issues are the subject of many recent researches. On the other hand, wind power generation is growing rapidly around the world and depends on the capacity of the wind farms, it may participate in microgrids. In such a case, the uncertainty of wind affects the operation of microgrids in many different aspects. Considering the stochastic effect of wind farms on microgrid operation and existence of some Electronically Interfaced DGs (EIDGs) in a microgrid, this paper proposes an Optimal Power Flow (OPF) formulation in order to determine the optimal control variables of each EIDG, such as PQ, PV and new model of DGs which is named Q-sharing DGs in a microgrid to achieve the minimum power loss. Numerical studies on 34-bus IEEE distribution test system including six EIDGs with wind farm show satisfactory results.

Keywords:

Distributed Generations , Microgrid , Microgrid Control Center , Optimal Power Flow , Q-sharing DGs , Reactive Power Control , Voltage Droop Characteristic