Teaching Control of Irrigation Canals for non system engineering audiences

Mantecón, Juan A.; Gómez, Manuel; Rodellar, José

doi:10.23919/ecc.2009.7075203

Cited by 1 publication

(2 citation statements)

References 2 publications

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“…Other examples of predictive control strategies to control of irrigation canals in the last two decades can be found in (Rodellar et al, 1989), (Pages et al, 1998), (Gómez et al, 2002), (Wahlin, 2004) (van Overloop, 2006, , (Sepúlveda, 2008), (Mantecon et al, 2010), (Delgoda et al, 2012), (Horváth, 2013), (Álvarez et al, 2013), ), (van Overloop et al, 2014 and .…”

Section: Predictive Controlmentioning

confidence: 99%

“…The canal, its software and hardware facilities have been documented in two PhD dissertations (Sepúlveda, 2008) and (Horváth, 2013). Subsequently it has been used for testing control algorithms in (Aguilar et al, 2009), and and also for teaching purposes (Mantecon et al, 2010). The general maintenance tasks of the facility, the calibration procedure guidelines and some improvements of the SCADA system, including a more accurate and documented version of the gate position controller has been part of the work fulfilled during the development of the dissertation presented here.…”

Section: Laboratory Canal Pac-upcmentioning

confidence: 99%

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Predictive control with dynamic constraints for closure and opening operations of irrigation canals

Galvis Restrepo

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Water delivery systems usually work in continuous way based on some prescribed flow conditions and user's needs . However there are situations in which abrupt changes in the operating conditions must be carried on. Typical examples are the alternative closing of a canal system during the non-demand periods to save water for other purposes as energy production, and the closure of a canal due the danger of water pollution in the supplier river. Closure of a canal means setting zero flow conditions by closing the gates along the canal, while maintaining specific water levels under the maximum allowed value. The closure operation requires a progressive and well planned set of actions to avoid overtopping and cracking in the canal lining, which can involve both economic and environmental issues. The opening operation involves restarting the canal to its normal operating condition from zero flow condition. This thesis is devoted to develop a supervised decentralized predictive control strategy for solving the problems related to the closure and opening operations of canal systems. The evaluation is fulfilled by means of numerical simulation on two cases of study in a variety of operating scenarios. The strategy is also experimentally validated through real-time implementation in a laboratory canal available in the Technical University of Catalonia (canal PAC-UPC). The control strategy has been developed in a two-level architecture: (i) a set of individual decentralized downstream water level predictive controllers, which are formulated via an optimal control problem under dynamic constraints and implemented by upstream local gates; and (ii) a supervising level to achieve the compromise of fast execution with smooth gate trajectories and water level regulation, even in the presence of disturbances. The simulation and real-time implementation scenarios have demonstrated that the proposed strategy is convenient for closure and opening of irrigation canals. Problems presented when the canal closure operations are not managed properly, such as overtopping, have been avoided in all the scenarios. Los canales de riego usualmente trabajan en forma continua bajo unas condiciones de flujo prescritas y acorde a las necesidades de agua de los usuarios. Sin embargo hay situaciones en las cuales se presentan cambios abruptos en las condiciones de operación. Un típico ejemplo es la alternativa de cierre durante los periodos de inactividad de los regantes. Dicho cierre tiene por objeto el ahorro de agua para otros propósitos, como puede ser la producción de energía. Otro ejemplo es la necesidad de cierre de un canal ante la presencia de un vertido de contaminantes aguas arriba en la fuente abastecedora de agua. El cierre de un canal requiere cerrar de forma progresiva y suave las compuertas de todo el canal, evitando desbordamientos y manteniendo unos calados de seguridad en los diferentes tramos del canal hasta llegar a una condición de caudal cero. La violación de los calados máximos puede producir inundaciones y pérdidas de agua innecesarias. La reducción de los niveles de agua por debajo de los calados mínimos permitidos puede causar daños en la estructura física del canal. Esta tesis se centra en el desarrollo de una estrategia de control predictivo descentralizado supervisado para gestionar de forma automática las operaciones de cierre y apertura de canales de riego. La evaluación de la estrategia se lleva a cabo mediante la simulación numérica en dos casos de estudio. Dicha evaluación se completa mediante experimentos en tiempo real realizados en un canal de laboratorio existente en la Universitat Politècnica de Catalunya (canal PAC-UPC). La estrategia de control se ha desarrollado con una arquitectura de dos niveles: (i) un conjunto de controladores individuales descentralizados para el control de niveles de aguas abajo, cuya formulación se plantea como un problema de control óptimo con restricciones dinámicas; y (ii) un nivel de supervisión encargado de alcanzar el compromiso de una ejecución rápida del proceso de cierre (o apertura) con movimientos suaves de compuerta y de una regulación de los niveles de agua dentro de los márgenes de consigna, incluso en presencia de perturbaciones. Tanto los escenarios de simulación como los de implementación en tiempo real, han demostrado que la estrategia propuesta en esta tesis es satisfactoria para operaciones de cierre y apertura de canales de riego. En efecto, la estrategia de control ha sido capaz de evitar problemas, como por ejemplo el desbordamiento, que se presentan cuando la operación de cierre de un canal no se realiza adecuadamente.

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Section: Predictive Controlmentioning

confidence: 99%

Section: Laboratory Canal Pac-upcmentioning

confidence: 99%

Predictive control with dynamic constraints for closure and opening operations of irrigation canals

Galvis Restrepo

View full text Add to dashboard Cite

show abstract

Teaching Control of Irrigation Canals for non system engineering audiences

Cited by 1 publication

References 2 publications

Predictive control with dynamic constraints for closure and opening operations of irrigation canals

Predictive control with dynamic constraints for closure and opening operations of irrigation canals

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