Results 31 to 40 of about 68,410 (300)

An Extreme Learning Machine-Based System Frequency Nadir Constraint Linearization Method [PDF]

open access: yes, 2021
Large-scale integration of converter-based renewable energy sources (RESs) into the power system will lead to a higher risk of frequency nadir limit violation and even frequency instability after the large power disturbance. Therefore, it is essential to consider the frequency nadir constraint (FNC) in power system scheduling.
Liu, Likai   +3 more
openaire   +2 more sources

Microwave spectroscopy of the Mars atmosphere [PDF]

open access: yes, 1995
A study of the use of millimeter-wavelength spectral transitions to investigate the atmosphere of Mars is presented. In the model experiments investigated it is assumed that a spectrometer in the frequency range from 100 to 260 GHz looks into a modest ...
Clancy, R. T., Muhleman, D. O.
core   +1 more source

Effective Inertial Response With New Coordinated Control for Multiple WPPs

open access: yesIEEE Access, 2022
This paper proposes a new coordinated control for multiple wind power plants (WPPs) based on two stepwise inertial control (SIC) methods to effectively release the kinetic energy of the permanent magnet synchronous generators (PMSGs) and improve their ...
Sunghoon Lim   +2 more
doaj   +1 more source

Flexible Kinetic Energy Release Controllers for a Wind Farm in an Islanding System

open access: yesEnergies, 2020
To improve frequency nadir following a disturbance and avoid under-frequency load shedding, two types of flexible kinetic energy release controllers for the doubly fed induction generator (DFIG) are proposed.
Yi-Wei Chen, Yuan-Yih Hsu
doaj   +1 more source

Frequency and Severity of Neutropenia Associated with Food and Drug Administration Approved and Compounded Formulations of Lomustine in Dogs with Cancer. [PDF]

open access: yes, 2015
BackgroundCompounded lomustine is used commonly in veterinary patients. However, the potential variability in these formulations is unknown and concern exists that compounded formulations of drugs may differ in potency from Food and Drug Administration ...
Burton, JH   +5 more
core   +2 more sources

Angular dependence of 12-kHz seafloor acoustic backscatter [PDF]

open access: yes, 1991
The angular dependence of seafloor acoustic backscatter,measured with a 12‐kHz multi narrow‐beam echo‐sounder at two sites in the central North Pacific with water depths of 1500 and 3100 m, respectively, has been determined for incidence angles between 0°
Alexandrou, Dimitri   +1 more
core   +2 more sources

Wind Speed Retrieval Algorithm Using Ku-Band Radar Onboard GPM Satellite

open access: yesRemote Sensing, 2021
The algorithm to retrieve wind speed in a wide swath from the normalized radar cross section (NRCS) was developed for the data of Dual Frequency Precipitation Radar (DPR) operating in scanning mode installed onboard a Global Precipitation Measurement ...
Maria Panfilova, Vladimir Karaev
doaj   +1 more source

Dynamic synthetic inertial control method of wind turbines considering fatigue load

open access: yesFrontiers in Energy Research, 2023
This paper proposes a dynamic synthetic inertia control method, considering the fatigue loads of the wind turbine. The control objectives include reducing the rate of change of frequency and frequency nadir of the power system and the fatigue load of the
Hanbo Wang   +4 more
doaj   +1 more source

Primary Frequency Response Enhancement for Future Low Inertia Power Systems Using Hybrid Control Technique

open access: yesEnergies, 2018
Maintaining the stability of a conventional power system during under frequency events is partially dominated by a natural behavior called inertial response.
Abdulhameed S. Alsharafi   +2 more
doaj   +1 more source

Aluminium Feeds for Reflector for NadirSAR [PDF]

open access: yes, 2018
With the long term aim of developing a NadirSAR quadrotor UAV system specialized for monitoring broad acre grain fields, a large aperture load bearing antenna to use as the main structural element was sort.
Gray, Derek, Le Kernec, Julien
core   +1 more source

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