Results 21 to 30 of about 5,760,690 (297)

From Smart Metering to Smart Grid

open access: yesMeasurement Science Review, 2016
The paper deals with evaluation of measurements in electrical distribution systems aimed at better use of data provided by Smart Metering systems. The influence of individual components of apparent power on the power loss is calculated and results of ...
Kukuča Peter, Chrapčiak Igor
doaj   +1 more source

Voltage regulation using three phase electric spring by fuzzy logic controller

open access: yesElectrical engineering & Electromechanics, 2023
Introduction. The renewable energy sources such as solar and wind power have increased significantly in recent years. However, as the generation of renewable energy has become more integrated, its intermission and instability have a major impact on the ...
A. Ikhe, Y. Pahariya
doaj   +1 more source

Digital Current-Control Schemes [PDF]

open access: yes, 2009
The paper is about comparing the performance of digital signal processor-based current controllers for three-phase active power filters. The wide use of nonlinear loads, such as front-end rectifiers connected to the power distribution systems for dc ...
Bojoi, Iustin Radu   +3 more
core   +1 more source

Subjective–objective methodology on selection of power quality compensation technology in AC–DC network with electrified railways

open access: yesThe Journal of Engineering, 2019
Electrified railways contain DC devices and cause power quality (PQ) issues such as harmonics, unbalance, and low-power factor, which should be solved by the most effective compensation technology to reduce the cost.
Yizheng Xu   +3 more
doaj   +1 more source

Discounted Costs Range Criterion Modification for Controlled Asynchronous Electric Drives

open access: yesEnergies, 2023
A range criterion of discounted costs is proposed, which takes into account all costs for a speed-controlled asynchronous electric drive, including its price, costs of losses and maintenance, and amortization charges.
Victor Petrushin   +4 more
doaj   +1 more source

Thermoelectric transport in strained Si and Si/Ge heterostructures

open access: yes, 2012
The anisotropic thermoelectric transport properties of bulk silicon strained in [111]-direction were studied by detailed first-principles calculations focussing on a possible enhancement of the power factor.
Bass J M   +13 more
core   +1 more source

Can High Frequency Acoustic Waves Heat the Quiet Sun Chromosphere? [PDF]

open access: yes, 2007
We use Hinode/SOT Ca II H-line and blue continuum broadband observations to study the presence and power of high frequency acoustic waves at high spatial resolution.
Carlsson, Mats   +11 more
core   +1 more source

State-of-the-Art Power Factor Correction: An Industry Perspective

open access: yesEncyclopedia
On 1 January 2001, the IEC 61000-3-2 regulation became effective. Since then, mitigating current harmonics has been essential to ensure that electronic equipment connected to single-phase power distribution lines conforms to electromagnetic compatibility
Claudio Adragna   +3 more
doaj   +1 more source

Energetic Factors of a Frequency-Controlled Synchronous Electric Drive

open access: yesИзвестия высших учебных заведений и энергетических объединенний СНГ: Энергетика, 2018
As compared to asynchronous frequency-controlled electric drives, synchronous drives are characterized by lower power losses, rigid mechanical characteristics without speed feedback and by the simplest law of frequency control (when the voltage changes ...
B. I. Firago, S. V. Aleksandrovsky
doaj   +1 more source

Impact of photovoltaic grid-tied systems on national grid power factor in Palestine

open access: yesAIMS Energy, 2022
Residential photovoltaic systems are a cost-effective solution for Palestinians to reduce their power costs while improving the environment. Despite their numerous advantages, these systems have several negative effects on the entire electric grid ...
Amer Braik   +4 more
doaj   +1 more source

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