NASA Scientific and Technical Aerospace Reports - The University ...

SCIENTIFIC AND TECHNICAL
AEROSPACE REPORTS
A Biweekly Publication of the National Aeronautics and Space Administration
VOLUME 48, NUMBER 10 MAY 24, 2010
01
AERONAUTICS (GENERAL)
Includes general research topics related to manned and unmanned aircraft and the problems of flight within the Earth’s atmosphere. Also
includes manufacturing, maintenance, and repair of aircraft. For specific topics in aeronautics, see categories 02 through 09. For
information related to space vehicles see 12 Astronautics.
20100017051 National Renewable Energy Lab., Golden, CO USA
Large-Scale Wind Integration Studies in the USA: Preliminary Results
Milligan, Michael; Lew, Debbie; Corbus, Dave; Piwko, Richard; Miller, Nicholas; September 2009; 8 pp.; In English
Contract(s)/Grant(s): DE-AC36-08-GO28308
Report No.(s): PB2010-105501; NREL/CP-550-46527; No Copyright; Avail.: National Technical Information Service
(NTIS)
The National Renewable Energy Laboratory, under the sponsorship of the U.S. Department of Energy, is managing two
large-scale wind integration studies. The Western Wind and Solar Integration Study (WWSIS) covers the footprint of
WestConnect, a group of transmission owners that covers most of Colorado, New Mexico, Arizona, Nevada, and Wyoming.
The Eastern Wind Integration and Transmission Study (EWITS) covers a large part of the Eastern Interconnection, and
leverages a large-scale transmission study known as the Joint Coordinated System Plan (JCSP). Both studies analyze the
impact of 20-30% wind energy penetration within the study footprint based on energy. This paper discusses key results that
have emerged so far from each study, focusing primarily on simulation results based on hourly production simulations. Results
from both studies show that high wind penetrations can be successfully integrated into the power system, but depend on
sufficient transmission and significant changes in operations.
NTIS
Large Scale Integration; Windpower Utilization; Renewable Energy
20100017116 National Renewable Energy Lab., Golden, CO USA
TurbSim User’s Guide: Version 1.50. Revised August 26, 2009 for TurbSim Version 1.50
Jonkman, B. J.; September 2009; 85 pp.; In English
Report No.(s): DE2009-965520; NREL/TP-500-46198; No Copyright; Avail.: National Technical Information Service
(NTIS)
TurbSim is a stochastic, full-field, turbulent-wind simulator. It uses a statistical model (as opposed to a physics-based
model) to numerically simulate time series of three-component wind-speed vectors at points in a two-dimensional vertical
rectangular grid that is fixed in space. TurbSim output can be used as input into AeroDyn-based codes such as FAST, YawDyn,
or MSC.ADAMS. AeroDyn uses Taylors frozen turbulence hypothesis to obtain local wind speeds, interpolating the
TurbSim-generated fields in both time and space. Spectra of velocity components and spatial coherence are defined in the
frequency domain, and an inverse Fourier transform produces time series. The underlying theory behind this method of
simulating time series assumes a stationary process. To simulate non-stationary components, TurbSimused with AeroDyncan
superimpose coherent turbulent structures onto the time series it generates.
NTIS
Boundary Layers; Turbulence; Wind Turbines
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