Distributed model for robust real-time operation of distribution systems and microgrids

摘要

This paper presents a distributed robust operation method for a distribution system which has multiple microgrids. Combination of alternating direction method of multipliers and robust optimization methods is implemented on the proposed operation problem. The presented method by coordinating decisions which are made in the individual distinct sub-systems provides robust strategies for the participating in day-ahead and real-time markets. The strategies are determined using appropriate forecasts of renewable energy resources' generation power, load and market prices by implementing auto-regressive technique with exogenous variables. By using proposed real-time method, the operation schedules would be determined before the day-ahead and the real-time markets' clearing times. The objective function is to minimize the operation costs of distributed energy resources and day-ahead and real-time markets' transaction costs which is decomposed using alternating direction method of multipliers. Coordination between microgrids and distribution system operator and forecasting are simulated in MATLAB. Finally, through a linkage between MATLAB and GAMS optimization software, mixed integer linear programming based problems are solved using CPLEX over the GAMS. Numerical studies are established based on realistic test system and the efficiency of robust operation is confirmed with after-the-fact analysis.