Some remarks on metrological properties and production technology of current transformers made of nanocrystalline cores
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DOI: 10.1016/j.measurement.2016.11.024
Abstract: Abstract Instrument current and voltage transformers remain the basic apparatuses used in energy measurements in electrical grid. The increasing importance of distributed energy sources necessitates more accurate measurements of consumed as well as generated electrical… read more here.
Keywords: energy; properties production; electrical energy; remarks metrological ... See more keywords
Influence of High Voltage DC Transmission on Measuring Accuracy of Current Transformers
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DOI: 10.1109/access.2018.2874624
Abstract: When the high-voltage direct current (HVDC) transmission is running under the monopole-ground-circuit operation mode, slight dc will be coupled into the nearby alternating current (ac) power grids and so has some negative influences, called dc… read more here.
Keywords: high voltage; current transformers; measuring accuracy; transmission ... See more keywords
Current Transformers in Protection Applications: The ANSI and International Electrotechnical Commission Standards
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DOI: 10.1109/mias.2021.3065321
Abstract: Current Transformers (CTs) produce scaled values of primary currents suitable for protective relays and measuring devices. For the correct implementation of protective relays and proper use of their functions, it is important to understand the… read more here.
Keywords: international electrotechnical; protection applications; ansi international; applications ansi ... See more keywords
Considerations for Dependability of the Motor Protection on Current Transformers Performance in VFD Applications
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DOI: 10.1109/tia.2017.2648778
Abstract: When generators or motors are started via variable frequency drive (VFD), initial frequency is very low, on the order of few hertz, and can be low for a considerable amount of time or even permanently.… read more here.
Keywords: protection; vfd; frequency; performance ... See more keywords
Wiener Filtering for Real-Time DSP Compensation of Current Transformers over a Wide Frequency Range
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DOI: 10.1109/tim.2017.2717238
Abstract: An efficient system for the compensation of current transformers over a wide frequency range is presented. The proposed technique is based on digital signal processing and inverse modeling using the frequency domain approach and Wiener… read more here.
Keywords: frequency; compensation; time; compensation current ... See more keywords
Analysis of the State of High-Voltage Current Transformers Based on Gradient Boosting on Decision Trees
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DOI: 10.1109/tpwrd.2020.3021702
Abstract: This paper addresses the problem of instrument current transformers technical state assessment based on machine learning methods. The introductory parts of the paper provide a detailed analysis of modern methods and approaches for technical state… read more here.
Keywords: state; high voltage; gradient boosting; boosting decision ... See more keywords
Wide-Band Current Transformers for Traveling-Waves-Based Protection Applications
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DOI: 10.1109/tsg.2020.3021997
Abstract: Owing to its system independence and unmatched speed, Traveling-wave (TW)-based relaying has become a top contender for transmission and distribution systems. However, existing measurement devices, such as Current Transformers (CTs), are incapable of capturing the… read more here.
Keywords: frequency content; protection; frequency; current transformers ... See more keywords
Influence of the Selection of the Core Shape and Winding Arrangement on the Accuracy of Current Transformers with Through-Going Primary Cable
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DOI: 10.3390/en14071932
Abstract: The current transformers with split-core are used for installation in places where it is impossible to install classic current transformers. Moreover, this design allows for any measurement location change, and even switching one current transformer… read more here.
Keywords: shape winding; accuracy; core shape; influence selection ... See more keywords