Semi-physical simulation and coordinated control of SOFC-PV/T-HP system

Abstract

Due to the differences in the dynamic characteristics of various energy processes, the operation and control of multi-energy coupled integrated energy systems (IES) pose significant challenges. This paper focuses on the semi-physical simulation and coordinated control of SOFC-PV/T-HP thermoelectric system, which includes solid oxide fuel cells, a solar photovoltaic/thermal panel and a heat pump. In order to enhance the experimental safety and reliability of the research findings, a semi-physical simulation platform is developed by integrating physical equipment and dynamic models. The operational characteristics of the cogeneration system are investigated and controlled using an extended state-space based model predictive algorithm. The experimental results demonstrate that the designed centralized model predictive controller effectively stabilizes the demand power of the battery. The standard deviation of the battery demand power is reduced from 2.39 W to 0.66 W within 500 s, which alleviates the regulation burden of the battery. At the same time, the hot water temperature is also well controlled. The fluctuation of hot water supply temperature does not exceed 0.11℃ after stability. The system can maintain stable operation under external disturbance, and maintain the balance between electricity/heat supply and demand.