Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 10 of 10 for “"wtg"”.
-
The Madden-Julian oscillation and nonlinear moisture modes
… demonstrate that the weak temperature gradient (WTG) approximation of Sobel et al. describes the small-scale limit of the moisture mode accurately,with the small expansion parameter being the ratio between temperature tendency and adiabatic cooling. Under the WTG balance, the only leading order …
-
Type-C wind turbine model order reduction and parameter identification
… the network by a Type-C wind turbine generator (WTG) can be described by a first-order nonlinear dynamical model that relates the WTG power output to wind speed. In this work the proposed model is validated through simulation and comparison to a published differential algebraic equation model as …
-
Provenance and depositional environments of the upper Permian-lowermost Triassic fluvial and lacustrine sandstones, Wutonggou low-order cycle, Bogda Mountains, NW China
… sandstones, Wutonggou low-order cycle (WTG LC), Bogda Mountains, NW China. In the first part, three petrofacies are identified on the basis of the relative abundances of quartz, feldspar, and lithics and conglomerate compositions and paleocurrent directions are documented. These data …
-
Assessing impact of the sulfate aerosol first indirect effect on tropical cyclone activity
… then rerun under weak temperature gradient mode (WTG). Runs successfully produce the Twomey or first indirect effect, which states that increased aerosols will increase cloud droplet number concentration, decrease the effective cloud droplet radius, and increase the cloud optical depth. The net …
-
Application of wind in large-scale electric power production
… required of existing Wind Turbine Generators (WTG) when placed in two sites in Virginia. The impacts of placing multiple WTG's in clusters to get higher power levels have been examined in details. A wake interference model has been included to calculate the amount of power reductions in …
-
Wind farm model for power system stability analysis
… farms based on type-C wind power generators (WTGs) is studied. Based on time scale decomposition, two detailed dynamic models are presented. In both models, a rotor speed controller, a reactive power controller and a pitch angle controller are considered. The turbine's aerodynamic is …
-
System Frequency Support of Permanent Magnet Synchronous Generator-Based Wind Power Plant
… synchronous generator wind Turbine System (PMSG-WTG) with full power back to back converters tends to become one of the most promising wind turbine technologies thanks to various advantages. It possesses a significant amount of kinetic energy stored in the rotating mass of turbine blades, which …
-
Performance Assessment and Management of Large Wind Farms under Abnormal Grid Operating Conditions
… for the various Wind Turbine Generator (WTG) technologies. The third research objective explores an important aspect for fault level estimation that is sequence network equivalence. Realistic fault impedances can be used to estimate fault current levels without including the whole model …
-
Downdraft impacts on tropical convection
… case from TOGA-COARE, Weak Temperature Gradient (WTG) simulations with varied shear profiles, and Lagrangian Parcel data to consider many difficult to observe properties of downdrafts. We consider a variety of assumptions and questions that arise in the development of convective parameterizations. …
-
Multivariate Analysis in Research and Industrial Environments
L'abstract è presente nell'allegato / the abstract is in the attachment