scholarly journals Weight-scheduling for linear time-variant model predictive wind turbine control toward field testing

2021 ◽  
Author(s):  
Thorben Wintermeyer-Kallen ◽  
Sebastian Dickler ◽  
János Zierath ◽  
Thomas Konrad ◽  
Dirk Abel
Keyword(s):  
Wind Turbine ◽  
Field Test ◽  
Control Method ◽  
Linear Time ◽  
Field Tests ◽  
Full Scale ◽  
Load Range ◽  
Operating Range ◽  
Scale Field ◽  
Constraints Model

AbstractModern multi-megawatt wind turbines require powerful control algorithms which consider several control objectives at the same time and respect process constraints. Model predictive control (MPC) is a promising control method and has been a research topic for years. So far, very few studies evaluated MPC algorithms in field tests. This work aims to prepare a real-time MPC system for a full-scale field test in a 3 MW wind turbine. To this end, we introduce a weight-scheduling scheme for a linear time-variant MPC in order to ensure control operation over the entire operating range from the partial to the full load range. We use a rapid control prototyping process, in particular with comprehensive software-in-the-loop (SiL) tests, in order to design and validate the MPC system for the field test.In this contribution, we present the implementation of the linear time-variant MPC with weight-scheduling to be tested in the field test. With the weight-scheduling for the optimization problem inside the MPC, we achieved good performance over the entire operating range of the wind turbine. In the SiL tests, the proposed MPC algorithm achieved loads, comparable to the baseline controller of the wind turbine and improved the reference tracking of the power output and the rotational speed. The proposed linear time-variant MPC with weight-scheduling is fully validated in the presented software-in-the-loop tests and is ready for full-scale field test in the 3 MW wind turbine. We present the experimental field test results of the introduced MPC system in a separated contribution.

scholarly journals Full-scale field test of a model predictive control system for a 3 MW wind turbine

2021 ◽  
Author(s):  
Sebastian Dickler ◽  
Thorben Wintermeyer-Kallen ◽  
János Zierath ◽  
Reik Bockhahn ◽  
Dirk Machost ◽  
...  
Keyword(s):  
Model Predictive Control ◽  
Wind Turbine ◽  
Field Test ◽  
Predictive Control ◽  
Linear Time ◽  
Full Scale ◽  
The Real ◽  
Rapid Control ◽  
Scale Field ◽  
Rapid Control Prototyping

AbstractModel predictive control (MPC) is a strong candidate for modern wind turbine control. While the design of model predictive wind turbine controllers in simulations has been extensively investigated in academic studies, the application of these controllers to real wind turbines reveals open research challenges. In this work, we focus on the validation of a linear time-variant MPC system for a 3 MW wind turbine in a full-scale field test. First, the study proves the MPC’s capability to control the real wind turbine in the partial load region. Compared to the turbine’s baseline PID controller, the MPC system offers similar results for the electrical power output and for the occurring mechanical loads. Second, the study validates a previously proposed, simulation-based rapid control prototyping process for a systematic MPC development. The systematic development process allows to completely design and parameterize the MPC system in a simulative environment independent of the real wind turbine. Through the rapid control prototyping process, the MPC commissioning in the wind turbine’s programmable logic controller can be realized within a few hours without any modifications required in the field. Thus, this study establishes the proof of concept for a linear time-variant MPC system for a 3 MW wind turbine in a full-scale field test and bridges the gap between the control design and field testing of MPC systems for wind turbines in the multi-megawatt range.

Effect of guy cable constraint on structural damping of open lattice antenna towers

1980 ◽  
Vol 7 (4) ◽  
pp. 614-620
Author(s):  
J. S. Kennedy ◽  
D. J. Wilson ◽  
P. F. Adams ◽  
M. Perlynn
Keyword(s):  
Natural Frequencies ◽  
Damping Ratio ◽  
Field Tests ◽  
Full Scale ◽  
Structural Damping ◽  
Scale Field ◽  
Modes Of Vibration

This paper presents the results of full-scale field tests on two steel guyed latticed towers. The towers were approximately 83 m in height, were guyed at three levels, and were of bolted angle construction. The observed results consist of the natural frequencies of the first two modes of vibration as well as the damping ratio for the first mode. The observed results are compared with analytical predictions and observations made concerning the contributions of structural and cable action to the damping ratio.

Rockfall Full Scale Field Tests

2013 ◽  
pp. 461-467
Author(s):  
Alberto Clerici ◽  
Ezio Giuriani ◽  
Danilo Cambiaghi ◽  
Antonio Isceri ◽  
Giorgio Vassena ◽  
...  
Keyword(s):  
Field Tests ◽  
Full Scale ◽  
Scale Field

scholarly journals Moisture performance of a new thermal insulation composite for interior application

2020 ◽  
Vol 172 ◽  
pp. 01001
Author(s):  
Carsten Rode ◽  
Naja Kastrup Friis ◽  
Christian Pedersen ◽  
Nickolaj Feldt Jensen
Keyword(s):  
Thermal Insulation ◽  
Field Test ◽  
Active Material ◽  
Field Tests ◽  
Full Scale ◽  
Small Samples ◽  
Brick Wall ◽  
Laboratory Setup ◽  
Mineral Fibre ◽  
Moisture Performance

The paper introduces prototypes of a new composite insulation product for interior application. The product consists of a standard mineral fibre insulation batt, which is wrapped in a combination of a thin fabric of moisture absorbing, capillary active material and vapour retarding membranes. The insulation composite has been tested with small samples in a laboratory setup and in an outdoor field test on a full-scale brick wall, and has so far shown promising results in comparison with other products. The paper describes the new insulation composite and the initial moisture tests that have been made with its constituents as well as results from the laboratory and field tests of its ability to prevent moisture accumulation.

scholarly journals Full-Scale Field Test of Wake Steering

2017 ◽  
Vol 854 ◽  
pp. 012013 ◽  
Author(s):  
Paul Fleming ◽  
Jennifer Annoni ◽  
Andrew Scholbrock ◽  
Eliot Quon ◽  
Scott Dana ◽  
...  
Keyword(s):  
Field Test ◽  
Full Scale ◽  
Scale Field

Development, Installation, and Operating Results of a Steam Injection System (STIG™) in a General Electric LM5000 Gas Generator

1987 ◽  
Vol 109 (3) ◽  
pp. 257-262 ◽  
Author(s):  
J. B. Burnham ◽  
M. H. Giuliani ◽  
D. J. Moeller
Keyword(s):  
Natural Gas ◽  
Field Test ◽  
Power Output ◽  
Steam Injection ◽  
Supply System ◽  
Full Scale ◽  
Injection System ◽  
Test Results ◽  
Gas Generator ◽  
Scale Field

This paper describes the first full-scale field test of a steam injection system for a natural-gas-fired G.E. LM5000 gas generator for the purpose of: (a) decreased exhaust emissions, (b) increased power output, and (c) improved efficiency. It discusses the steam supply system, engine features, test results, and plant economics for steam injection into the combustor and compressor discharge sections of the LM5000 at rates up to 65,000 lb/hr (29,510 kg/hr).

Full-scale field tests for bridging sinkholes using flexible steel components as reinforcement

2012 ◽  
Vol 27 (2) ◽  
pp. 161-165
Author(s):  
Daniel Flum ◽  
Armin Roduner ◽  
John Kalejta
Keyword(s):  
Field Tests ◽  
Full Scale ◽  
Scale Field

scholarly journals Alkali Effect on Alkali-Surfactant-Polymer (ASP) Flooding Enhanced Oil Recovery Performance: Two Large-Scale Field Tests’ Evidence

2020 ◽  
Vol 2020 ◽  
pp. 1-22 ◽  
Author(s):  
Chen Sun ◽  
Hu Guo ◽  
Yiqiang Li ◽  
Guipu Jiang ◽  
Ruicheng Ma
Keyword(s):  
Enhanced Oil Recovery ◽  
Field Test ◽  
Oil Recovery ◽  
Large Scale ◽  
Field Tests ◽  
Oil Prices ◽  
Asp Flooding ◽  
Scale Field ◽  
Large Scale Field ◽  
Better Than

Alkali-surfactant-polymer (ASP) flooding is very promising chemical enhanced oil recovery (EOR) technology which can make an incremental oil recovery factor (IORF) of 30% original oil in place (OOIP). How to choose alkali in ASP flooding remains a question for a long time. As the world’s only and largest ASP flooding application place, Daqing Oilfield has always adhered to the strategy of parallel development of strong alkali ASP flooding (SASP) and weak alkali ASP flooding (WASP), but SASP is in a dominant position, indicated by more investments and more project numbers. This leaves an impression that SASP is better than WASP. However, WASP is drawing more interest than SASP recently. Moreover, as the ASP flooding in Daqing went from field tests to commercial applications since 2014, how to comprehensively consider the benefit and cost of ASP flooding has become a new focus at low oil prices. This paper compares two typical large-scale field tests (B-1-D SASP and B-2-X WASP) completed in Daqing Oilfield and analyzes and discusses the causes of this difference. The injection viscosity and interfacial tension (IFT) for the two field test areas are substantially equivalent under the conditions of Daqing Oilfield, and WASP is better than SASP when reservoir geological conditions are considered. WASP exhibits the same IORF of 30% as SASP while having a much better economic performance. For the SASP field test, the injected strong alkali NaOH makes the test behave unlike a typical strong ASP flooding due to the presence of CO2 in the formation fluid, which well explains why IORF is much higher than all the other SASPs but scaling is less severe than others. This paper confirms that under Daqing Oilfield reservoir conditions, it is the alkali difference that caused the performance difference of these two tests, although some minor uncertainties exist. WASP is better than the SASP providing the same conditions . In addition, the detailed information of the two ASP field tests provided can give reference for the implementation of ASP flooding in other oilfields. After all, the study of ASP flooding enhanced oil recovery technology under low oil prices requires great foresight and determination.

Sign in / Sign up

Export Citation Format

Share Document