考虑零碳排放的电-气综合能源系统日前优化调度

DAY-AHEAD OPTIMAL DISPATCH OF ELECTRIC-GAS INTEGRATED ENERGY SYSTEMS CONSIDERING ZERO-CARBON EMISSIONS

基于碳捕集和电转气(P2G)技术,该文建立考虑零碳排放的电-气综合能源系统日前调度模型。首先,搭建零碳电-气综合能源系统框架,通过在燃煤机组上增设碳捕集装置收集燃煤机组产生的二氧化碳,并将其作为原料通过P2G技术将二氧化碳转换为甲烷,同时针对火电机组出力与产生甲烷量之间的数学关系进行深入研究。然后,以综合运行成本最低为目标建立日前调度模型,同时考虑电-气综合能源系统的零碳目标,将无法收集利用的二氧化碳通过购买碳排放权的方式排放到大气中,进而实现零碳的目标。最后,通过算例验证所提的零碳电-气综合能源系统的合理性,结果表明该文所提模型可实现电-气综合能源系统零碳排放的目标,且与传统电-气综合能源系统相比,减少弃风1320.96 MWh,降低运行成本56.16万元。

Based on the technology of carbon capture and power to gas(P2G),a day-ahead dispatching model of power-gas integrated energy system considering zero-carbon emissions is established in this paper.First,a framework of zero-carbon electric-gas integrated energy system is established.The CO2 generated by coal-fired units is collected by the carbon capture devices,and the captured CO2 is converted into CH4 by P2G technology.Meanwhile,the mathematical relationship between the output of thermal power unit and the amount of CH4 is deeply studied.Then,a dispatching model is established to minimize the comprehensive operation cost.At the same time,to achieve the goal of zero-carbon in the electric-gas integrated energy system,the CO2 that cannot be collected and utilized is discharged into the atmosphere by purchasing carbon emission rights,so as to achieve the goal of zero-carbon.Finally,an example is given to verify that the proposed model can achieve the goal of zero-carbon in electric-gas integrated energy system.Meanwhile,compared with the traditional dispatching model,the wind curtailment is reduced by 1320.96 MWh and the operating cost is reduced by 561.6 thousand yuan.