The paper proposes a method for microgrid optimal scheduling with renewable energy sources considering islanding constraints. The main purpose of the paper is to reduce the total operating cost of microgrid which includes the purchased energy cost from main grid and total local resources generation cost in grid-connected mode, and generation cost of local generators and renewable sources in islanding mode. The problem of microgrid optimal scheduling is classified into two subproblems like grid-connected mode as a main master problem and islanding mode as a subproblem. The results of grid-connected mode microgrid optimal scheduling are examined in the next subproblem of islanding mode for possible islanding. For the feasible islanding, if sufficient generation is not available the scheduling results will be revised by suitable islanding Bender’s cuts. The suitable islanding Bender’s cut will revise generator unit scheduling, energy storage scheduling and adjustable load scheduling. Numerical simulation has been carried out by using MATLAB software to exhibit the effectiveness of the proposed method of optimal scheduling of microgrid with renewable energy sources.

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考虑孤岛约束的可再生能源微电网优化调度

本文提出了一种考虑孤岛约束的可再生能源微电网优化调度方法。本文的主要目的是降低微电网的总运行成本，包括并网模式下从主网购买的能源成本和本地资源总发电成本，以及孤岛模式下本地发电机和可再生能源的发电成本。微电网优化调度问题分为并网模式为主问题和孤岛模式为子问题两个子问题。并网模式微电网优化调度的结果在孤岛模式的下一个子问题中检验可能的孤岛。对于可行的孤岛，如果没有足够的发电量，调度结果将通过适当的孤岛本德尔削减进行修改。合适的孤岛本德尔切割将修正发电机组调度、储能调度和可调负荷调度。利用MATLAB软件进行了数值模拟，验证了所提出的可再生能源微电网优化调度方法的有效性。