Results 11 to 20 of about 1,082,318 (297)

Determining Region Boundaries of Critical Commutation Failures in Multi-Infeed HVDC Systems Under Unbalanced Short Circuit Faults

open access: yesFrontiers in Energy Research, 2021
This paper presents a region boundaries determination method for critical commutation failures (CF) in multi-infeed high-voltage direct-current (HVDC) systems under unbalanced short circuit faults.
Guoqing Li   +4 more
doaj   +1 more source

Influence of single-phase circuit breaker tripping on inverter commutation

open access: yes电力工程技术, 2022
If commutation failure does not occur when single-phase high resistance grounded in single-circuit AC line of inverter,then single-phase circuit breaker tripping may lead to commutation failure.
SONG Xinfu   +4 more
doaj   +1 more source

Brewster angle for anisotropic materials from the extinction theorem [PDF]

open access: yesApplied Physics A, 2007
16 pages, 9 ...
Shu, Weixing   +3 more
openaire   +2 more sources

Simulation research on arc extinguishing characteristics of 35kV self-detaching lightning protection device based on magnetohydrodynamics

open access: yes电力工程技术, 2023
To explore the factors affecting the arc extinction performance of the self-disengaging lightning protection device, a numerical simulation model of arc extinction process of the device based on magneto-hydrodynamic theory is established in this paper ...
XIE Congzhen   +5 more
doaj   +1 more source

DC Power Control Strategy of MMC for Commutation Failure Prevention in Hybrid Multi-Terminal HVDC System

open access: yesIEEE Access, 2020
This article presents a control strategy for a modular multilevel converter (MMC) to prevent commutation failure of a line-commutated converter (LCC), forming a three-terminal hybrid HVDC transmission system, where one LCC sending end is connected to the
Choongman Lee   +3 more
doaj   +1 more source

An Aerosol Extinction Coefficient Retrieval Method and Characteristics Analysis of Landscape Images

open access: yesSensors, 2021
Images based on RGB pixel values were used to measure the extinction coefficient of aerosols suspended in an atmospheric state. The pixel values of the object-image depend on the target-object reflection ratio, reflection direction, object type ...
Dukhyeon Kim, Youngmin Noh
doaj   +1 more source

Broadband and Incident-Angle-Modulation Near-Infrared Polarizers Based on Optically Anisotropic SnSe

open access: yesNanomaterials, 2022
Optical anisotropy offers an extra degree of freedom to dynamically and reversibly regulate polarizing optical components, such as polarizers, without extra energy consumption and with high modulating efficiency.
Zhengfeng Guo   +4 more
doaj   +1 more source

Measurement of Wavelength-Resolved Light Absorption by Aerosols Utilizing a UV-VIS Extinction Cell [PDF]

open access: yes, 2005
The principle, technical details, and performance of the long path extinction spectrometer (LOPES), a new folded-path extinction cell with a spectral range from the mid-UV (200 nm) to the near infrared (1015 nm), is presented.
Schurath, Ulrich   +23 more
core   +1 more source

Measurements of Light Extinction by Single Aerosol Particles [PDF]

open access: yes, 2013
A Bessel beam optical trap is combined with continuous wave cavity ringdown spectroscopy to measure the extinction cross section of individual aerosol particles.
Reid, Jonathan P.   +3 more
core   +1 more source

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