低碳矿区综合能源系统经济运行优化研究

Economic operation optimization of an integrated energy system in low carbon mining area

针对煤矿开采过程中碳排放量高以及乏风、瓦斯、矿井涌水等伴生能源得不到及时有效利用的问题,提出一种低碳经济运行的矿区综合能源系统(coal mine integrated energy system, CMIES)。首先,为使矿区伴生能源得到充分利用,搭建了一个包含燃气轮机、乏风氧化发电单元、水源热泵等设备的CMIES模型。其次,为降低矿区碳排放量,在CMIES中加入光伏、风电、电转气与氢燃料电池等设备。同时,引入阶梯式碳交易机制与绿色证书交易机制(green certificate trading, GCT),通过“双机制”模型来约束系统碳排放、激励新能源设备出力。最后,调用CPLEX商业求解器,以购能成本、新能源设备运行成本、碳排放成本最小为目标函数进行求解。结果表明:优化后的CMIES碳排放量显著降低,运行成本大幅减少。

There are problems of high carbon emission in the process of coal mining and the lack of timely and effective use of associated energy such as that from a ventilation air meter,coal mine gas and mine gushing water.Thus a coal mine integrated energy system(CMIES)with low carbon and economic operation is proposed.First,to make full use of the associated energy in the mining area,a CMIES model including gas turbine,exhaust air oxidation power generation unit,water source heat pump and other equipment is built.Secondly,in order to reduce the carbon emissions,equipment such as photovoltaic,wind power,power-to-gas and hydrogen fuel cells are added to the CMIES.At the same time,stepwise carbon and green certificate trading mechanisms are introduced to constrain the system’s carbon emissions and stimulate the output of new energy equipment through the‘dual mechanism’model.Finally,the CPLEX commercial solver is used to solve the objective function with the minimum energy purchase,new energy equipment operation and carbon emission costs.The results show that the optimized CMIES carbon emissions are significantly reduced and the operating costs are greatly lowered.