中文摘要：

微电网因其发电形式多样、供电方式灵活而成为大电网的有益补充，但微电网的很多基础运行问题都与传统大电网有所不同，需要专门加以研究。研究了微电网的负荷优化分配问题，即在满足系统运行约束条件下优化微电网中微电源的出力，使系统总发电成本最小。分析建立了含有太阳能光伏发电、小型燃气轮机和储能装置的微电网负荷优化分配问题的数学模型，介绍了基于粒子群优化算法的数值求解方法，并通过算例验证了文中所提出方法的有效性。

英文摘要：

The microgrid has become a helpful supplement to the traditional power system because of its various clean resources and flexible power supply. Exclusive researches on microgrid operation are required as it is different from traditional power system operation. The load distribution optimization in microgrid is given special attention to make the total power generation cost minimum by optimizing the power generated by each micro-source while satisfying the constraints on system operation. A mathematical model is developed for load distribution optimization in a microgrid consisting of a photovoltaic system, a micro- turbine, and an energy storage system. The numerical solution based on particle swarm optimization （PSO） is worked out and an illustrative system is calculated with the algorithm proposed.