考虑灵活性的孤岛微电网群分层能量管理策略

彼此临近的孤岛微电网形成孤岛微电网群，可通过能量互济实现不同源荷特性的微电网之间的资源优化分配，进而提升区域电网运行的经济性、可靠性和可再生能源利用率。针对孤岛微电网群的能量管理问题，基于多代理系统，建立了孤岛微电网群分层能量管理架构。建立了灵活性指标评估可再生能源出力不确定性对系统运行的影响，在此基础上，构建了微电网层多目标优化能量管理策略和集群层能量分配策略。采用宽容分层序列法对线性化后的模型进行求解。最后以四个微电网组成的孤岛微电网群为例，验证了所提能量管理策略的有效性。

A hierarchical energy management strategy for an island microgrid cluster considering flexibility

Island microgrids adjacent to each other form an island microgrid cluster, which can realize optimal resource allocation among microgrids with different source-load characteristics through energy sharing, thereby improving economic performance, reliability and renewable energy utilization of regional power system operation. To solve the energy management problem, a hierarchical energy management architecture of the island microgrid cluster is established based on a multi-agent system. On this basis, the risk of flexibility shortage index is introduced to evaluate the impact of renewable energy output uncertainty on system operation. A multi-objective optimization energy management strategy and a cluster layer energy allocation strategy are constructed. The linearized model is solved by the tolerant lexicographic method. Finally, an island microgrid cluster consisting of four microgrids is taken as an example to verify the effectiveness of the proposed energy management strategy. This work is supported by Science and Technology Project of State Grid Corporation of China (No. 52170018000S).