2010: Non-linear control strategies with delay compensation in solar power plants

Bilateral project between Universidad Federal de Santa Catarina (UFSC, Brazil) and Universidad de Almería (UAL).

Within the framework of this project, there was a fluent interchange of researchers between the participating institutions: Universidad Federal de Santa Catarina (UFSC, Brazil) and Universidad de Almería (UAL)
5 researchers from UFSC performed stays equivalent to 4,5 years.
7 researchers from UAL performed stays equivalent to 3,0 years at UFSC.
As a result, more than 20 papers were published in relevant journals.

Proyecto: Estrategias de control no lineal con compensación del retardo en plantas de generación de energía solar
Código: PHB2009-0008-PC
Ámbito del proyecto: Internacional
Programa financiador: Proyecto de Cooperación Bilateral – convenio Hispano-Brasileño
Entidad financiadora: Ministerio de Educación
Responsable: Berenguel, Manuel
Fecha inicio: 09/01/2010
Fecha fin: 31/12/2013

A fundamental aspect in the implementation of systems based on renewable energies lies in the optimization of the operation, which translates into obtaining the maximum useful energy while minimizing the cost of its production for environmental conditions imposed by the external climate. In this sense, an important work to be undertaken in the project is the design of hierarchical control schemes for the proposed installations.

Two-layer hierarchical control schemes have been developed, consisting of a regulation layer where the regulatory control schemes of the facility’s components will be studied and a second layer for the automatic generation of slogans, analysing the convenience of developing it based on physical models or black box models. The hierarchical control schemes will also be fundamental for the starting and stopping of the installations, since all the installations that make use of solar energy operate in a discontinuous mode, with daily starts and stops, unlike other conventional installations.

Aspects related to the existence of energy storage systems and power conversion systems are also taken into account, so that the study of a planning system for the operation of the plant can be addressed, with the aim of achieving this automatically:

  1. Establish the appropriate setpoints according to the meteorological conditions so that these setpoints are achievable by the variables being regulated (typically temperatures, mass flows and pressures), taking into account the physical limitations of the actuators.
  2. Comply with plant safety restrictions.
  3. Assist the control algorithms in periods of operation such as plant start and stop.
  4. To avoid critical operation points that may damage any component of the operation.
  5. To bring the operation of the installation to the desired point of operation in a safe way.
  6. Establish the appropriate point of operation of the plant to maximize the production of useful energy while minimizing production costs.
  7. Translated with www.DeepL.com/Translator (free version)