考虑跨季节性储能的园区综合能源系统低碳经济调度方法

Low-carbon Economic Dispatch Method of Park Integrated Energy System Considering Cross-seasonal Energy Storage

为有效地降低园区综合能源系统(park integrated energy system,PIES)碳排放量,保证PIES供能的可靠性与经济性,考虑电−气−热多类型储能季节特性,提出电动汽车(electric vehicles,EV)参与的PIES季节性低碳经济调度方法。首先,考虑分布式电源出力不确定性,建立PIES碳流动态平衡方程,分析EV季节性运行特性,建立长期储气设备为跨季节性储能数学模型,构建多类型能量存储模型,估计PIES典型年供需匹配度;其次,将年度碳排放配额按季节进行碳交易折算,建立季节性阶梯碳交易机制,保证年度碳排放量满足碳配额要求。最后,综合考虑跨季节性储能调度总运行成本及碳配额匹配度,建立季节性PIES低碳经济调度模型,分析典型季节场景调度的经济性与低碳性。算例结果验证了引入跨季节性储能和EV并采用季节性调度方法对PIES低碳经济运行有积极影响。

In order to reduce the carbon emissions of the park integrated energy system(PIES),and to guarantee the reliability and economy of PIES energy supply,we put forward a PIES seasonal near-zero-carbon economic dispatch method involving electric vehicles(EVs)after taking the seasonal characteristics of electricity-gas-heat multi-type energy storage into consideration.Firstly,taking the uncertainty of distributed generation output into consideration,we established a PIES carbon flow dynamic equilibrium equation,and analyzed the seasonal operation characteristics of EV;meanwhile,we established a mathematical model of long-term gas storage equipment for cross-seasonal energy storage,and constructed a multi-type energy storage model to estimate the supply and demand matching degree of PIES typical years.Secondly,the annual carbon emission quota was converted into carbon trading according to the season,and a seasonal stepped carbon trading mechanism was established to ensure that the annual carbon emission could meet the carbon quota requirements.Finally,the total operating cost of cross-seasonal energy storage dispatch and the matching degree of carbon quota were taken into account,and a seasonal PIES low-carbon economic dispatch model was established to analyze the economy and low-carbon nature of dispatch in typical seasonal scenarios.The example analysis verifies the positive impact of seasonal energy storage,EV and seasonal scheduling on PIES energy conservation and emission reduction.