含小型冷热电联产的微电网系统经济运行

Research on Economical Operation of Micro-grid System with Small-sized CCHP

微电网能够有效利用各种分布式电源,其灵活、智能的控制特点,在解决能源短缺、环境保护和改善电能质量等方面表现出极大潜能。微电网不仅解决了分布电源的大规模接入问题,还能为用户带来经济上和环境上多方面的效益。建立了含小型冷热电联产的微电网系统在与外部配网系统并网状态下经济运行的数学模型以及成本优化的广义公式,提出的成本函数综合考虑了各种分布式电源的运行和维护费用、燃料消耗费用以及购售电费用等。最后,以某小区具体用能情况为例,给出了算例分析。

Micro-grid systems can effectively utilize a variety of distributed generators. With its flexible and intelligent control features, it has shown great potential in solving the energy shortage., environmental protection and improvingpowerquality, etc. Microgrids not only can solve the large-scale access of distributed generation, but also produce a wide range of economic and environmentalbenefits for the users. In this paper, a mathematical model on the economical operation of the micro-grid system with small-scale CCHPs in grid-connected operation and a generalized formula of cost optimization are established. The given cost function takes into account the operation and maintenance costs, fuel consumption cost of the distributed generators and the power purchase fees or sale fees. Finally, an example analysis is made based on the data of a neighborhood.