2002
DOI: 10.1016/s0005-1098(02)00008-0
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Energy-based control of a distributed solar collector field

Abstract: Model-based control of the outlet temperature of a distributed solar collector eld is studied. An energy-based cont r o l l e r i s d e r i v ed using internal energy as a storage function and controlled variable. The controller relies on a distributed parameter nonlinear plant model and includes feedforward from the solar irradiation and inlet temperature. Stability of the closed loop is proved, and the method is experimentally veri ed to perform well on a pilot-scale solar power plant.

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Cited by 65 publications
(36 citation statements)
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“…Some approaches on nonlinear control focus on the linearization of a nonlinear control problem. For example, starting from a Partial Differential Equation (PDE) model of the plant, a design based on Lyapunov methods is proposed in (Johansen and Storaa, 2002), using internal energy as Lyapunov function. In (Silva et al, 2003), a change in time scale which linearizes the plant is implemented, allowing very high and sudden changes in the reference variable.…”
Section: Process Modellingmentioning
confidence: 99%
“…Some approaches on nonlinear control focus on the linearization of a nonlinear control problem. For example, starting from a Partial Differential Equation (PDE) model of the plant, a design based on Lyapunov methods is proposed in (Johansen and Storaa, 2002), using internal energy as Lyapunov function. In (Silva et al, 2003), a change in time scale which linearizes the plant is implemented, allowing very high and sudden changes in the reference variable.…”
Section: Process Modellingmentioning
confidence: 99%
“…Like in [1] (and references therein) a feedforward term is included to cancel the variations of the solar radiations. Unlike [5], we show that our control strategy satisfies the limitations on the flow rate and guarantees the point-wise convergence of the interior and outlet tracking errors by extending the separation principle to the class of bilinear first-order hyperbolic PDEs that describe the solar collector. The proposed control law is based on a passivity-like principle and a boundary state observer.…”
Section: Introductionmentioning
confidence: 99%
“…Thereby, it is difficult to catch the main dynamics of the solar collector model using a finite order discretized model. In [5] a new control strategy based on the passivity theory was proposed. Using the internal energy a distributed stable and robust control law relying on feedback from the distributed collector fields internal energy was introduced.…”
Section: Introductionmentioning
confidence: 99%
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“…without any a priori knowledge about the plant, in this work, the goal was to increase performance by the development of an adaptive predictive controller embedding in its design the relevant physical characteristics of the plant. The ACUREX field used in these experiments is described in available literature (Camacho et al, 1992;Camacho et al, 1988) and has motivated a wide range of research work on more sophisticated controllers of which (Barão et al, 2002;Berenguel and Camacho, 1995;Camacho, Berenguel and Rubio, 1997;Camacho et al, 1992;Coito et al, 1997;Carotenuto et al, 1985;Carotenuto et al, 1986;Johansen et al, 2000;Johansen et al, 2002;Lemos, Rato and Mosca, 2000;Meaburn and Hughes, 1994;Orbach et al, 1981;Rorres et al, 1980;Rubio et al, 1995;Rubio et al, 1996;Silva et al, 1997) are significant examples.…”
Section: Introductionmentioning
confidence: 99%