考虑供热系统多重热惯性的电热联合系统协调优化
Coordinated Optimization of Combined Heat and Power Systems Considering Multiple Thermal Inertia of Heating System
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摘要: 针对热电联合系统中电、热能传输特性不同导致的电网与热网不协调的问题,提出一种考虑供热系统多重热惯性的电热联合协调优化策略。该文首先考虑固体储热体实际物理模型,采用ANSYS有限元软件对储热体温度场进行三维数值仿真。其次,建立固体电储热锅炉热惯性模型,同时建立供热网络和建筑物的热惯性模型。以热电联合系统运行成本最小为目标,建立考虑热力系统多重热惯性(multiple thermal inertia,MTI)的电热协调优化运行模型。最后以东北某地热电联合系统为仿真算例,结果表明,考虑热力系统多重热惯性的电热联合协调优化运行策略可以有效降低电热耦合强度,提高系统的灵活性和经济性。Abstract: In view of the incoordination problem between power grid and heat network caused by different electrical and thermal energy transmission characteristics, a coordinated optimization strategy of combined heat and power（CHP） system considering multiple thermal inertia of heating system was proposed. In this paper, the actual physical model of the heat storage body of the regenerative electric boiler was considered, and the three-dimensional numerical simulation of the temperature field of the thermal storage body was performed. The thermal inertia model of the regenerative electric boiler was established, and the thermal inertia model of the heating network and the building was established. Aiming at the minimum operating cost of the system, the electricthermal coordination optimized operation model of the multiple thermal inertia（MTI） of the combined heating system was established. Taking the CHP system in Northeast China as a simulation example, the results show that the electro-thermal coordination optimization operation strategy considering the MTI can effectively reduce the electro-thermal coupling strength and improve the flexibility and economy of the system.
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