燃气三联供耦合光伏系统运行策略优化

Operation Strategy Optimization of Gas Triple Supply Coupled Photovoltaic System

为提高燃气三联供耦合光伏系统的运行能效,以上海市某办公大厦分布式项目为例,在综合考虑项目设备特性、峰平谷电价和项目发电成本等因素的基础上,首先建立系统性能评估及经济性测算模型,然后对不同边界条件下三联供与国网直供能系统的经济性进行分析比较。最后结合大厦负荷现状,以系统综合运行费用为优化目标,确定冬、夏季典型日负荷工况下系统的运行策略。结果表明:电价高峰、平段时,三联供系统均具有良好的经济效益,电价低谷时当冬、夏季天然气价格分别高于3.69和3.99元/m3时直接用国网直供能运行费用更低。优化后系统运行策略方案与常规方案相比,每年可减少运行费用190.42万元,二氧化碳排放量236.06t,经济及环保效益显著。

In order to improve the energy efficiency of the gas triplex coupled photovoltaic system,a distributed project of an office building in Shanghai is taken as an example,in consideration of project equipment characteristics,electricity price and power generation cost of the project,first,the system performance evaluation and economic calculation model is established,and then the economy of the triple power supply system and the state grid direct power supply system under different boundary conditions are analyzed and compared.Finally,the system operation strategies under typical daily load conditions in winter and summer are determined,when the optimization target is the comprehensive operation cost of the system.The results show that the triplex power supply system has good economic benefits in the application range at the peak and flat stage of electricity price.In the low stage of electricity price,when the natural gas price is higher than 3.69yuan/m3 in winter and 3.99yuan/m3 in summer,the operation cost of direct power supply to the state grid is lower.Compared with the conventional scheme,the optimized system operation strategy scheme can reduce the operation cost by 1.9042 million yuan and the carbon dioxide emissions by 236.06 t per year,and the economic and environmental benefits are significant.