PERFORMANCE ANALYSIS AND COOPERATIVE CONTROL STRATEGY OF SOFC/MGT HYBRID POWER SYSTEM

Huo Haibo; Zhu Hongxiang; Xu Sheng; Cao Zhengliang; Xu Jingxiang; Li Xi

doi:10.19912/j.0254-0096.tynxb.2024-2025

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (6) : 79-88. DOI: 10.19912/j.0254-0096.tynxb.2024-2025

Special Topics of Academic Papers at the 27th Annual Meeting of the China Association for Science and Technology

PERFORMANCE ANALYSIS AND COOPERATIVE CONTROL STRATEGY OF SOFC/MGT HYBRID POWER SYSTEM

Huo Haibo¹, Zhu Hongxiang¹, Xu Sheng¹, Cao Zhengliang², Xu Jingxiang¹, Li Xi³

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Abstract

A novel methane-fueled solid oxide fuel cell/micro gas turbine （SOFC/MGT） hybrid system is proposed to enhance thermoelectric efficiency by utilizing high-temperature waste heat from the SOFC. To meet inlet temperature requirements and maximize waste heat utilization, the system adds fuel bypass valves and heaters, on the basis of the conventional hybrid configurations. To address the challenges of fluctuating load demands and maintaining optimal turbine inlet temperatures, the dynamic temperature and power output characteristics of each component are firstly analyzed under variable operating conditions using a mathematical model of the hybrid system. Then, on this basis, the temperature and power cooperative control strategy of the gybrid power system is designed.Simulation results indicate that the proposed control strategy allows the system to adapt smoothly to changing load demands, sustaining target turbine inlet temperatures while aligning with external power requirements. Findings also reveal that actively controlling turbine inlet temperatures not only supports efficient power tracking and safe operation but also significantly improves the hybrid system's overall efficiency.

Key words

solid oxide fuel cells / gas turbines / hybrid systems / temperature control / power control

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Huo Haibo, Zhu Hongxiang, Xu Sheng, Cao Zhengliang, Xu Jingxiang, Li Xi. PERFORMANCE ANALYSIS AND COOPERATIVE CONTROL STRATEGY OF SOFC/MGT HYBRID POWER SYSTEM[J]. Acta Energiae Solaris Sinica. 2025, 46(6): 79-88 https://doi.org/10.19912/j.0254-0096.tynxb.2024-2025

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