Optimal Control of Hydrosystems

Optimal Control of Hydrosystems

Author: Larry W. Mays

Publisher: CRC Press

Published: 2018-02-06

Total Pages: 385

ISBN-13: 1351083651

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"Combines the hydraulic simulation of physical processes with mathematical programming and differential dynamic programming techniques to ensure the optimization of hydrosystems. Presents the principles and methodologies for systems and optimal control concepts; features differential dynamic programming in developing models and solution algorithms for groundwater, real-time flood and sediment control of river-reservoir systems, and water distribution systems operations, as well as bay and estuary freshwater inflow reservoir oprations; and more."


Optimal Real-time Control of Stochastic, Multipurpose, Multireservoir Systems

Optimal Real-time Control of Stochastic, Multipurpose, Multireservoir Systems

Author: C. Russ Philbrick

Publisher:

Published: 1996

Total Pages: 381

ISBN-13: 9781423575948

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This thesis presents new systems analysis methods that are appropriate for complex, nonlinear systems that are driven by uncertain inputs. These methods extend the ability of discrete dynamic programming (DDP) to system models that include six or more state variables and a similar number of stochastic variables. This is accomplished by interpolation and quadrature methods that have high-order accuracy and that provide significant computational savings over traditional DDP interpolation and quadrature methods. These new methods significantly improve our ability to apply DDP to large-scale systems. Using these methods, DDP can solve a variety of systems analysis problems without resorting to the simplifying assumptions required by other stochastic optimization methods. This is demonstrated in the application of DDP to problems with as many as seven state variables. Of particular interest, this thesis applied DDP to the practical problem of conjunctively managing groundwater and surface water. Moreover, the applications also demonstrate that DDP can be a powerfill planning tool, such as when evaluating a range of capacity expansion alternatives.


Optimal Reservoir Operation Using Stochastic Model Predictive Control

Optimal Reservoir Operation Using Stochastic Model Predictive Control

Author: Reetik Kumar Sahu

Publisher:

Published: 2016

Total Pages: 65

ISBN-13:

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Dynamical systems are subjected to various random external forcings that complicate theie control. In order to achieve optimal performance, these systems need to continually adapt to external disturbances in real time. This capability is provided by feedback based control strategies that derive an optimal control from the current state of the system. Model Predictive Control(MPC) is one such feedback-based technique. This thesis explores the application of a stochastic version of MPC to a reservoir system. The reservoir system is designed to maximize the revenue generated from the hydroelectricity while simultaneously obeying several exogenous constraints. An ensemble based version of the stochastic MPC technique is studied and applied to the reservoir to determine the optimal water release strategies. Further analysis is performed to understand the sensitivity of different parameters in the MPC technique.