计及柔性负荷的园区热电联储系统优化配置

Optimal Configuration of Park Thermoelectric Reserve System Considering Flexible Load

随着新型电力系统建设的持续推进,以清洁能源为主体的综合能源系统成为“双碳”目标实现途径之一。为充分发挥电/热柔性负荷在园区综合能源系统中(park integrated energy system,PIES)的效用,首先基于可平移负荷、可转移负荷和可削减负荷建立电力柔性负荷模型,同时基于用户对温度感知的模糊性建立热力柔性负荷模型;其次采用混合整数线性规划方法,以系统的碳交易成本、运行维护成本、补偿成本、购电成本、购气成本、弃风弃光惩罚成本和投资成本之和最小为目标函数,对PIES系统进行配置优化,得到各设备的最佳容量及各时段出力值;最后进行仿真,算例结果表明,调度柔性负荷可优化电负荷和热负荷曲线并促进可再生能源消纳,从而提高风机装机容量,降低燃气轮机、蓄电池和蓄热罐容量,提高PIES系统经济性。

With the continuous advancement of the new power systems construction,the integrated energy system with clean energy as the main body becomes one of the focus of the“double carbon”goal.In order to give full play to the utility of power/thermal flexible loads in the park integrated energy system(PIES),it firstly establishes an electric flexible load model based on the translatable,transferable and curtailable loads,and at the same time establishes a thermal flexible load model based on the ambiguity of the usersperception of the temperature.Then,a mixed integer linear programming(MILP)method is used to optimize the configuration of the integrated energy system of the park,with the objective function of minimizing the sum of the systems carbon trading cost,operation and maintenance cost,compensation cost,electricity purchase cost,gas purchase cost,wind and light abandonment penalty cost and investment cost.Finally,the simulation results show that by scheduling flexible electric loads,the electric and thermal load curves can be optimized and the consumption of renewable energy can be promoted,so as to increase the installed capacity of the wind turbine,reduce the capacity of the gas turbine,the storage battery and the heat storage tank,and improve the economy of the system.