Results 51 to 60 of about 269,581 (297)

An Anti-Fluctuation Compensator Design and Its Control Strategy for Wind Farm System

open access: yesEnergies, 2021
Large-scale wind farms in commercial operations have demonstrated growing influence on the stability of an electricity network and the power quality thereof.
Feng-Chang Gu, Hung-Cheng Chen
doaj   +1 more source

Reactive Atom Plasma (RAP) figuring machine for meter class optical surfaces [PDF]

open access: yes, 2013
A new surface figuring machine called Helios 1200 is presented in this paper. It is designed for the figuring of meter sized optical surfaces with form accuracy correction capability better than 20 nm rms within a reduced number of iterations.
Castelli, Marco   +4 more
core   +1 more source

Pulmonary Dysfunction Is Associated With Sleep Study Abnormalities in Children With Sickle Cell Disease: A Multicenter Study

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Introduction Pulmonary dysfunction and sleep abnormalities are common in children with sickle cell disease (SCD) and are associated with worse clinical outcomes. Whether spirometry abnormalities are associated with polysomnography (PSG) findings remains unclear.
Ammar Saadoon Alishlash   +4 more
wiley   +1 more source

Assessment and enhancement of transfer capability for large-scale renewable generation base transmitted by voltage source converter based high voltage direct current system

open access: yesInternational Journal of Electrical Power & Energy Systems
Voltage source converter based high voltage direct current transmission is a key method for transmitting large-scale renewable energy generation. The transfer capability of large-scale renewable generation base transmitted by voltage source converter ...
Shiyuan Chen   +4 more
doaj   +1 more source

Complete active-reactive power resource scheduling of smart distribution system with high penetration of distributed energy resources

open access: yesJournal of Modern Power Systems and Clean Energy, 2017
In traditional power systems, besides the conventional power plants that provide the necessary reactive power in transmission system, the shunt capacitors along with the tap changers of transformers are also employed in distribution networks.
Abouzar SAMIMI, Mehdi NIKZAD
doaj   +1 more source

Dietary Protein Intake and Peritoneal Protein Losses in Peritoneal Dialysis Patients

open access: yesTherapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Introduction Peritoneal dialysis (PD) patients lose protein in their waste dialysate, potentially increasing their risk for malnutrition. We wished to determine whether there was any association between losses and dietary protein intake (DPI). Methods DPI was assessed from 24‐h dietary recall using Nutrics software.
Haalah Shaaker, Andrew Davenport
wiley   +1 more source

Evaluation of the Reactive Power Support Capability and Associated Technical Costs of Photovoltaic Farms’ Operation

open access: yesEnergies, 2018
The share of photovoltaic (PV) farms is increasing in the energy mix as power systems move away from conventional carbon-emitting sources. PV farms are equipped with an expensive power converter, which is, most of the time, used well bellow its rated ...
Luís F. N. Lourenço   +4 more
doaj   +1 more source

Reactive power based fair calculation approach for multiobjective load dispatch problem [PDF]

open access: yesArchives of Electrical Engineering, 2019
This paper proposes a fair calculation approach for the cost and emission of generators. Generators also have reactive power requirements along with the active power demand to meet up the total power demand.
Harinder Pal Singh   +2 more
doaj   +1 more source

Power electronics options for large wind farm integration : VSC-based HVDC transmission [PDF]

open access: yes, 2006
This paper describes the use of voltage source converter based HVDC transmission (VSC transmission) system for grid integration of large wind farms over long distance.
Sasse, C., Xu, L., Yao, L.
core   +2 more sources

Research on Reactive Power Adjustment Capability of Hydro-generators

open access: yesIOP Conference Series: Materials Science and Engineering, 2019
Abstract With the continuous access of new energy sources to the power grid, the requirements of the power grid for reactive power adjustment capability are also continuously improving, and stronger reactive power adjustment capability is needed to keep the power grid voltage in a controllable range.To maintain the terminal voltage level
Dawei Jiang   +6 more
openaire   +1 more source

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