计及负荷特性的综合能源系统低碳经济调度

Low-carbon economic dispatch of integrated energy systems considering load characteristics

随着“双碳”目标的不断推进,为改善电-热园区综合能源系统(IES)供需矛盾,平抑负荷波动及降低碳排放量,提出了计及电热负荷特性的IES低碳经济调度策略。采用能源集线器模型对园区IES进行建模,体现用户侧电热柔性负荷的特性。目标函数为碳交易成本及IES运行成本之和最小,采用Cplex求解器进行求解,得到2种场景下的IES日前运行成本及碳交易成本,通过对仿真结果对比分析电热柔性负荷在碳交易机制下降低IES日前运行成本及碳交易成本的作用。电热柔性负荷参与调度的结果,柔性负荷特性能够减少IES日前运行成本,起到平滑负荷曲线、减小负荷峰谷差的作用,还能够改善源荷矛盾,减少碳排放。

With the continuous advancement of"double carbon"target,to alleviate the contradiction between supply and demand of a power-thermal integrated energy system(IES),and stabilize load fluctuations and reduce carbon emissions,a low-carbon economy dispatch strategy for the IES taking the characteristics of power and heat loads into account is proposed.An energy hub model of the IES can reflect the characteristics of flexible power and heat loads on user side.The objective function aims at minimizing the sum of carbon trading cost and operation cost of the IES.Solved by Cplex solver,the day-ahead operation cost and carbon trading cost of the IES under two scenarios are obtained.According to the simulation results,the reduction of the IES day-ahead operation cost and carbon trading cost made by flexible power and heat loads under carbon trading mechanism is expounded.Flexible loads can lower the IES day-ahead operation cost by smoothing the load curve and diminishing peak-valley difference,so as to alleviate the source-load contradiction and carbon emissions.