nowadays, we live in a world which quality, speed, accuracy and cost are the most important parameters in parts' design and manufacturing. due to the complexity of part manufacturing, traditional and nontraditional manufacturing techniques are used. aerodynamic tests usually requires one or several models for testing in wind tunnels and these models typically have particular complexities in whi...

Wind speed and direction are important essential climate variables (ECVs). GNSS-R is an emerging remote sensing technique that can be potentially used to retrieve wind speed from space. However, few studies have addressed the wind direction retrieval from spaceborne GNSS-R observables, namely the Delay Doppler map (DDM). In this study, the feasibility of retrieving wind direction from the synth...

• How large of an effect can the temporal variation of wind power have on the value of wind in different wind resource areas? • Which locations are affected most positively or negatively by the seasonal and diurnal timing of wind speeds? • How compatible are wind resources in the Pacific Northwest and California with wholesale power prices and loads in either region? • Can modeled/estimated win...

Individual wind turbines in a wind farm typically operate to maximize their performance with no consideration of the impact of wake effects on downstream turbines. There is potential to increase power and reduce structural loads within a wind farm by properly coordinating the turbines. To effectively design and analyze coordinated wind turbine controllers requires control-oriented turbine wake ...

The harmonic impact caused by wind turbines should be carefully investigated before wind turbines are interconnected. However, the harmonic currents of wind turbines are not easily predicted due to the variations of wind speed. If the harmonic current outputs can be predicted accurately, the harmonic impact of wind turbines and wind farms for power grids can be analyzed efficiently. Therefore, ...

This paper surveys the impact of large scale wind power integration on the small signal stability performance of the power systems. For this purpose, different factors concerning wind power generation such as wind power integration levels and wind power plant location are considered in the small signal stability assessment of a weak power system via modal analysis. The changes in the modal char...

Wind energy offers the potential to reduce carbon emissions while increasing energy independence and bolstering economic development. However, wind energy has a larger land footprint per Gigawatt (GW) than most other forms of energy production and has known and predicted adverse effects on wildlife. The Northern Great Plains (NGP) is home both to some of the world's best wind resources and to r...

Abstract Global wind energy has expanded 5-fold since 2010 and is predicted to expand another 8–10-fold over the next 30 years. Wakes generated by turbines can alter downwind microclimates potentially vegetation. However, design of past studies made it difficult isolate impact wake effects on vegetation from land cover change. We used hourly data model non-wake zones around 17 facilities across...