Results 11 to 20 of about 4,437,500 (186)

Rotor Design And Performance Study Of An Airborne Wind Energy System With Flight Dynamics Simulator [PDF]

open access: yesمهندسی مکانیک شریف, 2023
Airborne wind energy system (AWES) is a novel approach in wind energy harvesting. It has several advantages against conventional horizontal axis wind turbine (HAWT), like using less material and thus lower manufacturing cost, higher efficiency, stable ...
M. Ahmadi, S. Karimian Aliabadi
doaj   +1 more source

Analytic solution to swing equations in power grids with ZIP load models.

open access: yesPLoS ONE, 2023
ObjectiveThis research pioneers a novel approach to obtain a closed-form analytic solution to the nonlinear second order differential swing equation that models power system dynamics.
HyungSeon Oh
doaj   +3 more sources

Image acquisition effects on Unmanned Air Vehicle snow depth retrievals [PDF]

open access: yesProceedings of the International Association of Hydrological Sciences, 2018
Advancements in technology have facilitated new opportunities in aerial photogrammetry; one of these is the use of unmanned aerial vehicles (UAVs) to estimate snow depth (SD).
A. E. Tekeli, S. Dönmez
doaj   +1 more source

Study of Rotor Slot Wedge Eddy Current Loss of Nuclear Power Turbo-generator under Negative Sequence Operation

open access: yesJournal of Harbin University of Science and Technology, 2018
In order to study the generator rotor slot wedge eddy current loss under different conditions . The 1407MVA turbo generator at half speed is researched as an example. Mathematical model is established in 2D electromagnetic field.
GE Bao-jun   +5 more
doaj   +1 more source

Voltage stability improvement of an Egyptian power grid‐based wind energy system using STATCOM

open access: yesWind Energy, 2022
The increase in electricity demand places its focus on renewable energies as sustainable energy resources. Wind energy is one of the most important green energy sources.
Montaser Abdelsattar   +6 more
doaj   +1 more source

An Invasive Weed Optimization for Sensor Less Control of Grid Integrated Wind Driven Doubly Fed Induction Generator

open access: yesIEEE Access, 2022
The article presents the design and development of invasive weed optimization (IWO) for the sensor less speed control of doubly fed induction generator (DFIG) under balanced and unbalanced conditions. A healthy condition represents the balanced condition
Abhinav Saxena   +5 more
doaj   +1 more source

Environment-sensitive behavior of fluorescent molecular rotors

open access: yesJournal of Biological Engineering, 2010
Molecular rotors are a group of fluorescent molecules that form twisted intramolecular charge transfer (TICT) states upon photoexcitation. When intramolecular twisting occurs, the molecular rotor returns to the ground state either by emission of a red ...
Theodorakis Emmanuel A, Haidekker Mark A
doaj   +1 more source

Drone‐mounted audio‐visual deterrence of bats: implications for reducing aerial wildlife mortality by wind turbines

open access: yesRemote Sensing in Ecology and Conservation, 2023
Wind energy is a major and rapidly expanding renewable energy source. Horizontal‐axis wind turbines, the main tool in this industry, induce mortality in flying animals and consequently bring about conservation concerns and regulatory restrictions.
Yuval Werber   +4 more
doaj   +1 more source

Prediction of Compressor Blade Erosion Experiments in a Cascade Based on Flat Plate Specimen

open access: yesFrontiers in Mechanical Engineering, 2022
Erosion is an essential deterioration mechanism in compressors of jet engines. Erosion damage predictions require the determination of erosion rates through flat plate experiments.
Max Lorenz   +4 more
doaj   +1 more source

Fault Analysis of a Small PV/Wind Farm Hybrid System Connected to the Grid

open access: yesApplied Sciences, 2023
The dynamic modeling, control, and simulation of renewable energy sources connected to the electrical grid are investigated in this study. Photovoltaic (PV) systems and wind systems connected to the power grid via the point of common connection (PCC ...
Bilel Dhouib   +3 more
doaj   +1 more source

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