Optimal Operation Strategy for Combined Heat and Power System Based on Solid Electric Thermal Storage Boiler and Thermal Inertia

Abstract

Aiming at the problem of source-load incoordination of combined heat and power (CHP) system caused by the high electro-thermal coupling strength, a optimal operation strategy of combined heat and power system based on electric thermal storage boiler and thermal inertia is proposed. Firstly, the internal heat transfer model of the solid electric thermal storage boiler was studied, and the three-dimensional numerical simulation of the temperature field of the thermal storage body was performed. Then, the thermal inertia model of the heating network and the building is established. On this basis, a coordinated optimization model of CHP system based on thermal storage boiler and thermal inertia is established with the goal of minimizing the operating cost of the system. The results show that the optimization strategy proposed in this paper can effectively reduce the electro-thermal coupling strength and improve the flexibility and economy of the CHP system.