从成本和效益2个方面详细分析了微网的经济性，在微网基本结构的基础上进行了简化，给出了供电、供热、供气一体化的微网结构，建立了考虑温室气体、污染物排放的以微网运行成本最低为目标函数的微网经济模型，并用粒子群优化算法对上述模型进行求解。算例结果验证了该模型的有效性和可行性，表明在大电网中并入微网具有较高的经济性。

The economy of microgrid is analyzed in both cost and benefit. Based on its basic structure, the structure of microgrid is simplified and the microgrid structure, in which the power supply, thermal supply and fuel gas supply are integrated, is given; an economic model of microgrid, in which the emission of pollutant and greenhouse gases are taken into account and the minimum operation cost of microgrid is taken as objective function, is built. The proposed model is solved by particle swarm optimization (PSO) algorithm. Calculation example shows that the built model is effective and feasible and it is indicated that a higher economy can be achieved while microgrids are connected with large-scale power grid.

国家重点基础研究发展计划项目(973项目) (2009CB219706)

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