VARIABLE PARAMETER ACTIVE DISTURBANCE REJECTION CONTROL FOR OUTLET TEMPERATURE OF PARABOLIC TROUGH SOLAR COLLECTOR FIELDS

Sun Ming; Zhao Jixing; Xu Wenxin; Xu Jianhua; Jiang Wei

doi:10.19912/j.0254-0096.tynxb.2024-2091

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (3) : 40-48. DOI: 10.19912/j.0254-0096.tynxb.2024-2091

VARIABLE PARAMETER ACTIVE DISTURBANCE REJECTION CONTROL FOR OUTLET TEMPERATURE OF PARABOLIC TROUGH SOLAR COLLECTOR FIELDS

Sun Ming^1,2, Zhao Jixing¹, Xu Wenxin¹, Xu Jianhua¹, Jiang Wei^1,2

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Abstract

The temperature of the heat transfer oil plays a critical role in ensuring the safety and economic performance of parabolic trough solar thermal systems. However, due to the system’s inherent characteristics—such as large inertia, strong nonlinearity, and susceptibility to various disturbances—enhancing the performance of the outlet temperature control system in the collector field has emerged as a significant challenge and an important research focus. To address this issue, a comprehensive global nonlinear mechanistic model of the heat collection pipeline is first developed, along with a relative-degree transfer function model at typical operating points. Using these models as a foundation, the parameters of a linear active disturbance rejection controller （ADRC） are tuned and subsequently employed to train a Gaussian process regression model for predicting controller parameters at different outlet temperature setpoints. The stability of the closed-loop control system under this parameter-varying strategy is then analyzed using Kharitonov's theorem. Simulation results demonstrate that, under complex operating conditions, the proposed parameter-varying ADRC strategy achieves outstanding setpoint tracking, disturbance rejection, and robustness. Compared to traditional PI, ADRC, and parameter-varying PI controllers, the proposed approach delivers superior performance in both individual metrics and integral performance indices.

Key words

parabolic trough solar collector system / linear active disturbance rejection control / Gaussian process regression / variable parameters / stability analysis / heat transfer oil temperature

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Sun Ming, Zhao Jixing, Xu Wenxin, Xu Jianhua, Jiang Wei. VARIABLE PARAMETER ACTIVE DISTURBANCE REJECTION CONTROL FOR OUTLET TEMPERATURE OF PARABOLIC TROUGH SOLAR COLLECTOR FIELDS[J]. Acta Energiae Solaris Sinica. 2026, 47(3): 40-48 https://doi.org/10.19912/j.0254-0096.tynxb.2024-2091

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