This paper presents the application of a nonlinear controller, using a predictive control strategy, to the distributed collector field of a solar power plant at the Plataforma Solar de Almeria (Spain). The design procedure of the controller, developed at RuhrUniversity] Bochum, uses the mathematical inputoutput model of the plant to find a controller output, using an evident search strategy which minimizes a cost function for a given prediction horizon. It is, in principle] an indirect adaptive controller, since the model it uses could be changing at every sampling instant. However, the nonlinear model of the plant, adopted for the application of the nonlinear controller , was assumed to be one of "time-invariant" nature: developed by INESC, Lisbon.

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