中文摘要：

微网技术的发展较好地解决了分布式电源并网后其出力随机性给电网带来的不利影响。但当大量分散的微网接入配电网时，难以保证对多微网系统调度的高效性与经济性。基于上述问题，提出了针对电网峰平谷时段的多微网系统协调调度策略，建立了基于双层优化理论的多微网协调调度模型。在上层优化模型中，将考虑网损的多微网系统综合运行成本最小作为目标函数，在下层优化模型中将各微网自身的运行经济性作为优化目标，通过合理分配各微网出力以及微网间的交互，最终得到多微网系统的最佳运行方式．仿真结果表明．本文提出的调度模型和调度策略有效可行，能够降低网损，提高微网运行的经济性．

英文摘要：

The development of microgrid technology can solve the negative effects caused by the randomness of the distributed power supply. But when a lot of multi microgrid access to distribution network, the efficiency and economy of scheduling them is difficult to be guaranteed. This paper proposes a coordinated scheduling strategy during off-peak periods for multi mierogrid system, and establishes an optimaUy coordinating scheduling model of the multi microgrid based on bi-level optimization theory. In the upper-level model, the minimum integrated operating cost of multi microgrid considering network loss is taken as the objective function. In the lower model, the operation economy of each mierogrid is optimized as the goal. The optimal operation mode of the multi microgrid system can be obtained by allocating each microgrid＇s output and interaction among microgrids. The simulation results show that the scheduling model and the scheduling strategy is feasible to reduce the network loss and improve the operating economics of the microgrid.