Results 11 to 20 of about 227,228 (264)

New Approach to Evaluate the Transformation Accuracy of Inductive CTs for Distorted Current

open access: yesEnergies, 2023
This paper presents a newly developed method to determine the values of current error and phase displacement for the transformation of distorted current harmonics by the inductive current transformers.
Michal Kaczmarek, Ernest Stano
doaj   +1 more source

Low-Power Voltage Transformer Smart Frequency Modeling and Output Prediction up to 2.5 kHz, Using Sinc-Response Approach

open access: yesSensors, 2020
The instrument transformers scenario is moving towards the adoption of a new generation of low-power instrument transformers. This disruptive change also requires that the modeling, characterization, and testing of those devices must be improved ...
Abbas Ghaderi   +3 more
doaj   +1 more source

Calibration Procedure to Test the Effects of Multiple Influence Quantities on Low-Power Voltage Transformers

open access: yesSensors, 2020
The article presents a study on low-power voltage transformers (LPVTs). Considering their increasing spread among Smart Grids, it is fundamental to assess their accuracy behavior in as realistic conditions as possible.
Alessandro Mingotti   +2 more
doaj   +1 more source

A Phase Correlation Anti-Noise Displacement Estimation Method Based on PSD Phase Screening

open access: yesApplied Sciences, 2022
When using digital images to obtain the displacement of a structure, noise is always a factor that greatly affects the accuracy of the displacement results.
Yunsheng Zhang   +5 more
doaj   +1 more source

Phase Converter of Composing Displacement

open access: yesBulletin of the South Ural State University. Ser. Computer Technologies, Automatic Control & Radioelectronics, 2016
Minimax strategy of mechatronic converters efficiency improving relative to error decrease with velocity increase at the same time provides common dataware level rise. The analysis of usage possibilities of different type position transducers (PT) gives the advantages of resolvers.
SMIRNOV YU.S.   +4 more
openaire   +4 more sources

Job displacement costs of phasing out coal

open access: yesJournal of Public Economics, 2022
The reduction of carbon emissions will require a rapid phasing out of coal and the displacement of millions of coal miners. How much could this energy transition cost mining workers? We use the dramatic collapse of the UK coal industry to estimate the long-term impact on displaced miners.
Fernando M. Aragón   +3 more
openaire   +4 more sources

Displacement measuring interferometer for sub-nano meter resolution

open access: yesMeasurement: Sensors, 2021
In this presentation, the displacement measurement system using sinusoidal phase modulation interferometer and modified phase-locked loop is discussed.
Masato Higuchi   +2 more
doaj   +1 more source

Influence of wall roughness on two-phase displacement

open access: yesShenzhen Daxue xuebao. Ligong ban, 2022
In the development of oil and gas fields, water flooding is still the most important development method. The influence of the existence of rough channel on two-phase flow cannot be ignored.
LI Dajun   +4 more
doaj   +1 more source

A New Method to Verify the Measurement Speed and Accuracy of Frequency Modulated Interferometers

open access: yesApplied Sciences, 2021
The measurement speed and measurement accuracy of a displacement measuring interferometer are key parameters. To verify these parameters, a fast and high-accuracy motion is required.
Toan-Thang Vu   +4 more
doaj   +1 more source

Effect of Wettability Heterogeneity on Water-Gas Two-Phase Displacement Behavior in a Complex Pore Structure by Phase-Field Model

open access: yesEnergies, 2022
Understanding the immiscible displacement mechanism in porous media is vital to enhancing the hydrocarbon resources in the oil and gas reservoir. Improving resource recovery requires quantitatively characterizing the effect of wettability heterogeneity ...
Wenbo Gong, Jinhui Liu
doaj   +1 more source

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