Results 1 to 10 of about 26,454 (225)

On the Long-Period Accuracy Behavior of Inductive and Low-Power Instrument Transformers [PDF]

Sensors, 2020
The accuracy evaluation of instrument transformers is always a key task when proper control and management of the power network is required. In particular, accuracy becomes a critical aspect when the grid or the instrumentation itself is operating at ...
Alessandro Mingotti, Lorenzo Bartolomei, Lorenzo Peretto, Roberto Tinarelli   +3 more
doaj   +5 more sources

Reference High-Voltage Sensing Chain for the Assessment of Class 0.1-WB3 Instrument Transformers in the Frequency Range up to 150 kHz According to IEC 61869 [PDF]

Sensors
This paper presents the development and characterization of a reference high-voltage sensing chain for the calibration and conformity assessment of instrument transformers with Class 0.1-WB3, in the extended frequency range up to 150 kHz, according to ...
Mohamed Agazar, Claudio Iodice, Mario Luiso   +2 more
doaj   +2 more sources

Power Grids and Instrument Transformers up to 150 kHz: A Review of Literature and Standards [PDF]

Sensors
The phenomenon of high-frequency distortion (HFD) in the electric grids, at both low-voltage (LV) and medium-voltage (MV) levels, is gaining increasing interest within the scientific and technical community due to its growing occurrence and the ...
Mohamed Agazar, Giovanni D’Avanzo, Guglielmo Frigo, Domenico Giordano, Claudio Iodice, Palma Sara Letizia, Mario Luiso, Andrea Mariscotti, Alessandro Mingotti, Fabio Munoz, Daniele Palladini, Gert Rietveld, Helko van den Brom   +12 more
doaj   +2 more sources

Traceable Characterization of Low Power Voltage Instrument Transformers for PQ and PMU Applications [PDF]

2020 Conference on Precision Electromagnetic Measurements (CPEM), 2020
Diffusion of digital technologies in transmission and distribution substations is fostering utilization of low power instrument transformers for use in in metering, protection, as well as in monitoring and control applications. From the metrological point of view, new reference systems and procedures are needed to ensure traceable measurement, in ...
Crotti G., Delle Femine A., Gallo D., Giordano D., Landi C., Letizia P. S., Luiso M.   +6 more
openaire   +4 more sources

Novel and Simplified Procedure to Test Immunity of Low-Power Voltage Transformers

Sensors, 2022
International technical committees put considerable efforts into the writing process of standards. They always try to find a tradeoff between the rigorous scientific requirements and the practical needs of manufacturers and final users.
Alessandro Mingotti, Lorenzo Peretto, Roberto Tinarelli   +2 more
doaj   +1 more source

Modern Methods of Construction Problem Solving in Designing Various Types of Instrument Transformers

Energies, 2022
Current and voltage instrument transformers are essential elements of the power system. They work like transformers but do not transmit power. Their task is to accurately transform currents or voltages during system operation, which are then used for ...
Elzbieta Lesniewska
doaj   +1 more source

Low-Power Instrument Transformers and Energy Meters: Opportunities and Obstacles

IEEE Instrumentation & Measurement Magazine, 2023
Low-Power Instrument Transformers (LPITs) are becoming the preferred measurement device in the medium voltage (MV) distribution network (DN). They have several benefits compared to legacy solutions. However, the adoption of LPITs results in the need for adapting the grid and its assets to accept them. One practical example is using LPITs as the current
Mingotti, A, Betti, C, Peretto, L, Tinarelli, R   +3 more
openaire   +2 more sources

Challenges of Accurate Measurement of Distorted Current and Voltage in the Power Grid by Conventional Instrument Transformers

Energies, 2023
Power grids are a combined system where the electrical energy produced by the power plants is transmitted to consumers. This forms a specific interdependence where the recipients have a significant impact on the power quality.
Michal Kaczmarek, Ernest Stano
doaj   +1 more source

Characterization of Instrument Transformers under Realistic Conditions: Impact of Single and Combined Influence Quantities on Their Wideband Behavior

Sensors, 2023
Instrument transformers (ITs) play a key role in electrical power systems, facilitating the accurate monitoring and measurement of electrical quantities.
Palma Sara Letizia, Gabriella Crotti, Alessandro Mingotti, Roberto Tinarelli, Yeying Chen, Enrico Mohns, Mohamed Agazar, Daniela Istrate, Burak Ayhan, Hüseyin Çayci, Robert Stiegler   +10 more
doaj   +1 more source

Why Should We Test the Wideband Transformation Accuracy of Medium Voltage Inductive Voltage Transformers?

Energies, 2021
In this paper the results of the tests of the wideband transformation accuracy of medium voltage (MV) inductive voltage transformers (VTs) in the frequencies range from 50 Hz up to 5 kHz are presented.
Michal Kaczmarek, Ernest Stano
doaj   +1 more source