High Accuracy Atmospheric Wind Field Measurements with an Edge Technique Lidar

1997 ◽  
pp. 259-262
Author(s):  
C. Laurence Korb ◽  
Bruce M. Gentry ◽  
S. Xingfu Li
Keyword(s):  
Wind Field ◽  
Field Measurements ◽  
High Accuracy

scholarly journals High accuracy magnetic field measurements with a Hall probe

1999 ◽  
Vol 70 (6) ◽  
pp. 2703-2707 ◽  
Author(s):  
C. Schott ◽  
R. S. Popovic ◽  
S. Alberti ◽  
M. Q. Tran
Keyword(s):  
Magnetic Field ◽  
Field Measurements ◽  
High Accuracy ◽  
Hall Probe ◽  
Magnetic Field Measurements

scholarly journals Power Quality Disturbances Assessment during Unintentional Islanding Scenarios. A Contribution to Voltage Sag Studies

Energies ◽  
2019 ◽  
Vol 12 (16) ◽  
pp. 3198 ◽  
Author(s):  
Alexandre Serrano-Fontova ◽  
Pablo Casals Torrens ◽  
Ricard Bosch
Keyword(s):  
Induction Motors ◽  
Circuit Breaker ◽  
Field Measurements ◽  
High Accuracy ◽  
Voltage Sag ◽  
Three Phase ◽  
Wide Range ◽  
Islanding Operation ◽  
Power Quality Disturbances ◽  
Digital Simulations

This paper presents a novel voltage sag topology that occurs during an unintentional islanding operation (IO) within a distribution network (DN) due to large induction motors (IMs). When a fault occurs, following the circuit breaker (CB) fault clearing, transiently, the IMs act as generators due to their remanent kinetic energy until the CB reclosing takes place. This paper primarily contributes to voltage sag characterization. Therefore, this novel topology is presented, analytically modelled and further validated. It is worth mentioning that this voltage sag has been identified in a real DN in which events have been recorded for two years. The model validation of the proposed voltage sag is done via digital simulations with a model of the real DN implemented in Matlab considering a wide range of scenarios. Both simulations and field measurements confirm the voltage sag analytical expression presented in this paper as well as exhibiting the high accuracy achieved in the three-phase model adopted.

Spatio-temporal modeling of the wind field over an urban lake subject to wind sheltering

2022 ◽  
Keyword(s):  
Wind Direction ◽  
Wind Field ◽  
Field Measurements ◽  
Structure Alignment ◽  
Urban Lake ◽  
Quality Model ◽  
Wind Model ◽  
Cfd Modelling ◽  
Prevailing Wind Direction ◽  
Spatio Temporal

Abstract The wind field over an urban lake may exhibit considerable variability due to wind shielding effects from surrounding structures. Field measurements at an urban reservoir in Singapore were augmented by computational fluid dynamics (CFD) model results to develop a wind model over the reservoir surface via a data assimilation approach. The field measurements identified, depending on structure alignment with the prevailing wind direction, wind shielding that impacted wind direction and velocity over the reservoir surface. The wind model integrated the temporal response of the measurements and spatial distribution produced by the CFD modelling. The wind model was used to predict the spatio-temporal pattern of the wind field over the reservoir surface for a full year. The modeling results showed good agreement with measured wind data at three measurement locations on the reservoir surface. The wind model has been incorporated with a hydrodynamics and water quality model to provide the spatio-temporal wind forcing over the reservoir surface.

Airborne Doppler Lidar Wind Field Measurements

1984 ◽  
Vol 65 (4) ◽  
pp. 348-359 ◽  
Author(s):  
J. Bilbro ◽  
G. Fichtl ◽  
D. Fitzjarrald ◽  
M. Krause ◽  
R. Lee
Keyword(s):  
Wind Field ◽  
Field Measurements ◽  
Doppler Lidar
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