Real-time hybrid aeroelastic simulation of wind turbines with various types of full-scale tuned liquid dampers

Wind Energy ◽  
2018 ◽  
Vol 22 (2) ◽  
pp. 239-256 ◽  
Author(s):  
Zili Zhang ◽  
Biswajit Basu ◽  
Søren R.K. Nielsen
Keyword(s):  
Real Time ◽  
Wind Turbines ◽  
Full Scale ◽  
Tuned Liquid Dampers ◽  
Liquid Dampers

Performance evaluation of full-scale tuned liquid dampers (TLDs) for vibration control of large wind turbines using real-time hybrid testing

2016 ◽  
Vol 126 ◽  
pp. 417-431 ◽  
Author(s):  
Zili Zhang ◽  
Andrea Staino ◽  
Biswajit Basu ◽  
Søren R.K. Nielsen
Keyword(s):  
Performance Evaluation ◽  
Vibration Control ◽  
Real Time ◽  
Wind Turbines ◽  
Full Scale ◽  
Hybrid Testing ◽  
Tuned Liquid Dampers ◽  
Liquid Dampers ◽  
Large Wind

scholarly journals Experimental determination of structural damping of a full‐scale building with and without tuned liquid dampers

2020 ◽  
Author(s):  
Marius Tarpø ◽  
Christos Georgakis ◽  
Anders Brandt ◽  
Rune Brincker
Keyword(s):  
Experimental Determination ◽  
Full Scale ◽  
Structural Damping ◽  
Tuned Liquid Dampers ◽  
Liquid Dampers

scholarly journals Real-time hybrid simulation technique for performance evaluation of full-scale sloshing dampers in wind turbines

2016 ◽  
Vol 753 ◽  
pp. 082021
Author(s):  
Zili Zhang ◽  
Biswajit Basu ◽  
Saren R.K. Nielsen
Keyword(s):  
Performance Evaluation ◽  
Real Time ◽  
Wind Turbines ◽  
Hybrid Simulation ◽  
Full Scale ◽  
Simulation Technique

Real-time hybrid simulation of the size effect of tuned liquid dampers

2016 ◽  
Vol 24 (9) ◽  
pp. e1962 ◽  
Author(s):  
Fei Zhu ◽  
Jin-Ting Wang ◽  
Feng Jin ◽  
Li-Qiao Lu ◽  
Yao Gui ◽  
...  
Keyword(s):  
Size Effect ◽  
Real Time ◽  
Hybrid Simulation ◽  
Tuned Liquid Dampers ◽  
Liquid Dampers

Test-bed and Full-Scale Demonstration of Plasma Flow Control for Wind Turbines. Phase 1

2013 ◽  
Author(s):  
Neal E. Fine ◽  
Christopher Szlatenyi ◽  
Benjamin Rosenthal
Keyword(s):  
Flow Control ◽  
Wind Turbines ◽  
Plasma Flow ◽  
Phase 1 ◽  
Full Scale ◽  
Test Bed ◽  
Plasma Flow Control

Seismic response control with density-variable tuned liquid dampers

2009 ◽  
Vol 8 (4) ◽  
pp. 537-546 ◽  
Author(s):  
Yuxiang Xin ◽  
Genda Chen ◽  
Menglin Lou
Keyword(s):  
Seismic Response ◽  
Response Control ◽  
Seismic Response Control ◽  
Tuned Liquid Dampers ◽  
Liquid Dampers

scholarly journals Tuned liquid dampers simulation for earthquake response control of buildings

2013 ◽  
Vol 12 (2) ◽  
pp. 1007-1024 ◽  
Author(s):  
T. Novo ◽  
H. Varum ◽  
F. Teixeira-Dias ◽  
H. Rodrigues ◽  
M. Falcao Silva ◽  
...  
Keyword(s):  
Earthquake Response ◽  
Response Control ◽  
Tuned Liquid Dampers ◽  
Liquid Dampers

Low-Cost Measurement of Hydraulic Fracture Dimensions Using Pressure Data in Treatment and Observation Wells – A Workflow for Every Well

2021 ◽  
Author(s):  
A. Kirby Nicholson ◽  
Robert C. Bachman ◽  
R. Yvonne Scherz ◽  
Robert V. Hawkes
Keyword(s):  
Hydraulic Fracturing ◽  
Real Time ◽  
Hydraulic Fracture ◽  
Full Scale ◽  
Pressure Data ◽  
Observation Well ◽  
High Quality ◽  
Fracture Length ◽  
Geometry Model ◽  
Observation Wells

Abstract Pressure and stage volume are the least expensive and most readily available data for diagnostic analysis of hydraulic fracturing operations. Case history data from the Midland Basin is used to demonstrate how high-quality, time-synchronized pressure measurements at a treatment and an offsetting shut-in producing well can provide the necessary input to calculate fracture geometries at both wells and estimate perforation cluster efficiency at the treatment well. No special wellbore monitoring equipment is required. In summary, the methods outlined in this paper quantifies fracture geometries as compared to the more general observations of Daneshy (2020) and Haustveit et al. (2020). Pressures collected in Diagnostic Fracture Injection Tests (DFITs), select toe-stage full-scale fracture treatments, and offset observation wells are used to demonstrate a simple workflow. The pressure data combined with Volume to First Response (Vfr) at the observation well is used to create a geometry model of fracture length, width, and height estimates at the treatment well as illustrated in Figure 1. The producing fracture length of the observation well is also determined. Pressure Transient Analysis (PTA) techniques, a Perkins-Kern-Nordgren (PKN) fracture propagation model and offset well Fracture Driven Interaction (FDI) pressures are used to quantify hydraulic fracture dimensions. The PTA-derived Farfield Fracture Extension Pressure, FFEP, concept was introduced in Nicholson et al. (2019) and is summarized in Appendix B of this paper. FFEP replaces Instantaneous Shut-In Pressure, ISIP, for use in net pressure calculations. FFEP is determined and utilized in both DFITs and full-scale fracture inter-stage fall-off data. The use of the Primary Pressure Derivative (PPD) to accurately identify FFEP simplifies and speeds up the analysis, allowing for real time treatment decisions. This new technique is called Rapid-PTA. Additionally, the plotted shape and gradient of the observation-well pressure response can identify whether FDI's are hydraulic or poroelastic before a fracture stage is completed and may be used to change stage volume on the fly. Figure 1Fracture Geometry Model with FDI Pressure Matching Case studies are presented showing the full workflow required to generate the fracture geometry model. The component inputs for the model are presented including a toe-stage DFIT, inter-stage pressure fall-off, and the FDI pressure build-up. We discuss how to optimize these hydraulic fractures in hindsight (look-back) and what might have been done in real time during the completion operations given this workflow and field-ready advanced data-handling capability. Hydraulic fracturing operations can be optimized in real time using new Rapid-PTA techniques for high quality pressure data collected on treating and observation wells. This process opens the door for more advanced geometry modeling and for rapid design changes to save costs and improve well productivity and ultimate recovery.

Transformer‐less five‐level high‐voltage full‐scale converter with a self‐balance auxiliary circuit for 10 MW wind turbines

2017 ◽  
Vol 10 (14) ◽  
pp. 1841-1851 ◽  
Author(s):  
Xiang‐jun Zeng ◽  
Hang Wang ◽  
Xiao Zhang ◽  
De‐ling Gong ◽  
Xu Yang
Keyword(s):  
Wind Turbines ◽  
High Voltage ◽  
Full Scale ◽  
Auxiliary Circuit
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