含电转气及电转热的园区综合能源系统建模与优化运行

Modeling and optimal scheduling of integrated energy system for parks including power to gas and power to heat

电转气及电转热技术对于消纳新能源及移峰填谷具有重要意义,研究其应用于园区综合能源系统的经济性,对其在需求侧的推广应用具有重要作用。首先对系统中的关键设备建立数学模型;然后以系统运行成本最低为目标,以能量平衡、设备运行、与电网交换功率为约束,建立系统优化运行模型;最后,利用混合整数线性规划法求解该模型。算例表明,与分供系统及“以电定热”“以热定电”的运行策略相比,含电转气与电转热设备的园区综合能源系统经济性更好,运行策略更具优势,且能够提高低谷期用电量,具有较强的移峰填谷能力。

Power to gas and power to heat are significant to re⁃newable energy accommodation and shift peaks and fill the valley.The research on the economics of applying it to the integrated ener⁃gy system of the park plays an important role in the promotion and application on the demand side.Firstly,a mathematical model of the key devices in the system is established.Then a system optimization operation model,aiming at the lowest system operating cost,with en⁃ergy balance,equipment operation,and power exchange with the grid as constraints is established.Finally,the model is solved by the mixed integer linear programming method.The example shows that compared with the separated production system and the operation strategy of FED and FTD,the integrated energy system of the park with power to gas and power to heat is more economical and opera⁃tional strategy is better.Power to gas and power to heat devices also can effectively utilize the electricity in the power system valley load period,and has a strong ability to shift peaks and fill the valley.