Study on Multivariable Dynamic Matrix Control for a Novel Solar Hybrid STIGT System

Shupeng Zheng, Zecheng Luo, Jiwu Wu, Lunyuan Zhang and Yijian He ()
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Shupeng Zheng: Institute of Refrigeration and Cryogenics, Zhejiang University, Hangzhou 310027, China
Zecheng Luo: Institute of Refrigeration and Cryogenics, Zhejiang University, Hangzhou 310027, China
Jiwu Wu: Zhejiang Jilisi Auto Air-Condition Co., Ltd., Lishui 323000, China
Lunyuan Zhang: Institute of Refrigeration and Cryogenics, Zhejiang University, Hangzhou 310027, China
Yijian He: Institute of Refrigeration and Cryogenics, Zhejiang University, Hangzhou 310027, China

Energies, 2024, vol. 17, issue 6, 1-27

Abstract: To construct a clean and efficient energy system, advanced solar thermal power generation technology is developed, i.e., a solar hybrid STIGT (Steam Injected Gas Turbine) system with near zero water supply. Such a system is conducive to the efficient use of solar energy and water resources, and to improvement of the performance of the overall system. Given that the strong correlation between multiple-input and multiple-output of the new system, the MDMC (Multivariable Dynamic Matrix Control) method is proposed as an alternative to a PID (Proportional-Integral-Derivative) controller to meet requirements in achieving better control characteristics for a complex power system. First, based on MATLAB/Simulink, a dynamic model of the novel system is established. Then it is validated by both experimental and literature data, yielding an error no more than 5%. Subsequently, simulation results demonstrate that the overshoot of output power on MDMC is 1.2%, lower than the 3.4% observed with the PID controller. This improvement in stability, along with a reduction in settling time and peak time by over 50%, highlights the excellent potential of the MDMC in controlling overshoot and settling time in the novel system, while providing enhanced stability, rapidity, and accuracy in the regulation and control of distribution networks.

Keywords: solar energy; power generation; water/heat recovery; MDMC (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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