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Design of non-linear model predictive control for temperature stabilization of a parabolic trough solar-thermal power plant

Savateev, Gleb (2014) Design of non-linear model predictive control for temperature stabilization of a parabolic trough solar-thermal power plant. Master's, Technical University Dortmund.

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Abstract

At the present time, Nonlinear Model Predictive Control (NMPC) has already found its application to parabolic trough solar-thermal power plants, based on oil as a heat transfer fluid. Besides that, certain commercially successful configurations of such systems, making use of water-steam separators in the solar field, with water as a heat transfer fluid already exist. Nevertheless, there still remains a significant direction for further improvement and price reduction of this renewable energy technology. One promising option are plants with the so-called once-through mode and water as a heat transfer fluid. Such technical config-uration would afford to achieve a higher efficiency in comparison to the oil-based parabol-ic troughs plants, while considerably reducing the necessary investments in comparison to the plants making use of additional water-steam separators. However, the once-through-based parabolic trough plants are challenging to control. This master thesis is focused on the design of an NMPC for the stabilization of the outlet temperature of a parabolic trough solar power plant. Furthermore, the concern of observer design, as of an obligatory prerequisite for an NMPC algorithm, is addressed. In the framework of the present master thesis an observability analysis of the given system is performed and a few most commonly used state estimation techniques are examined. As a result, some of them get discarded and eventually particle filter is chosen, since it is more appropriate for nonlinear state estimation than the Kalman-filter-based methods, like extended Kalman filter or unscented Kalman filter. After the subsequent development of the NMPC algorithm, its performance is compared to a control scheme based on proportional-integral controllers. Based on results of that comparison, conclusion are drawn and suggestions for future research are given.

Item URL in elib:https://elib.dlr.de/93633/
Document Type:Thesis (Master's)
Additional Information:Supervisor: Jan Fabian Feldhoff (DLR)
Title:Design of non-linear model predictive control for temperature stabilization of a parabolic trough solar-thermal power plant
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Savateev, GlebTU DortmundUNSPECIFIED
Date:November 2014
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Number of Pages:99
Status:Published
Keywords:non-linear model predictive control, NMPC, parabolic trough, direct steam generation, DSG, CSP, state estimation
Institution:Technical University Dortmund
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:Concentrating Solar Systems (old)
DLR - Research area:Energy
DLR - Program:E SF - Solar research
DLR - Research theme (Project):E - Line-Focusing Systems (old)
Location: Stuttgart
Institutes and Institutions:Institute of Solar Research > Linienfokussierende Systeme
Deposited By: Feldhoff, Dr.-Ing. Jan Fabian
Deposited On:19 Dec 2014 13:35
Last Modified:19 Dec 2014 13:35

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