Characterization and Modeling of a Current Transformer Working Under Thermal Stress

Bui, Anh Tuan; Sixdenier, Fabien; Morel, Laurent; Burais, Noël

doi:10.1109/tmag.2012.2197017

Cited by 9 publications

(4 citation statements)

References 12 publications

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“…The characterization and the accuracy aspects related to the operation of inductive and non-conventional ITs are discussed in [17][18][19][20][21][22][23]. In particular, [17] describes the calibration of traditional and electronic transformers, while [18,21,22] are specific for current transformers. Finally, performance assessment when ITs are working at off-nominal conditions (including high frequency, temperature, etc.)…”

Section: Introductionmentioning

confidence: 99%

On the Importance of Characterizing Virtual PMUs for Hardware-in-the-Loop and Digital Twin Applications

Mingotti

Costa

Cavaliere

et al. 2021

Sensors

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In recent years, the introduction of real-time simulators (RTS) has changed the way of researching the power network. In particular, researchers and system operators (SOs) are now capable of simulating the complete network and of making it interact with the real world thanks to the hardware-in-the-loop (HIL) and digital twin (DT) concepts. Such tools create infinite scenarios in which the network can be tested and virtually monitored to, for example, predict and avoid faults or energy shortages. Furthermore, the real-time monitoring of the network allows estimating the status of the electrical assets and consequently undertake their predictive maintenance. The success of the HIL and DT application relies on the fact that the simulated network elements (cables, generation, accessories, converters, etc.) are correctly modeled and characterized. This is particularly true if the RTS acquisition capabilities are used to enable the HIL and the DT. To this purpose, this work aims at emphasizing the role of a preliminary characterization of the virtual elements inside the RTS system, experimentally verifying how the overall performance is significantly affected by them. To this purpose, a virtual phasor measurement unit (PMU) is tested and characterized to understand its uncertainty contribution. To achieve that, firstly, the characterization of a virtual PMU calibrator is described. Afterward, the virtual PMU calibration is performed, and the results clearly highlight its key role in the overall uncertainty. It is then possible to conclude that the characterization of the virtual elements, or models, inside RTS systems (omitted most of the time) is fundamental to avoid wrong results. The same concepts can be extended to all those fields that exploit HIL and DT capabilities.

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Section: Introductionmentioning

confidence: 99%

On the Importance of Characterizing Virtual PMUs for Hardware-in-the-Loop and Digital Twin Applications

Mingotti

Costa

Cavaliere

et al. 2021

Sensors

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“…Ref. [ 17 , 18 ] are some of the research works for LPIT modeling, while [ 19 ] is an attempt to inductive CT modeling by accurate measurement of the model parameters. In [ 20 ], what obtained in [ 19 ] is used for prediction of the ratio error and phase displacement under controlled influence quantities which can be used for online calibration of ITs.…”

Section: Introductionmentioning

confidence: 99%

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

Ghaderi

Mingotti

Peretto

et al. 2020

Sensors

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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. Therefore, this study focuses on a smart approach developed by the authors in a previous study to estimate the output of low-power voltage transformers (LPVT). The approach—which is based on a sort of modeling in the frequency domain (the so-called sinc-response)—allows obtaining the behavior of the LPVT at rated and distorted conditions. Experimental tests performed on off-the-shelf devices confirm the applicability and effectiveness of the proposed approach when estimating the output response of LPVTs.

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“…Current transformers, together with voltage transformers (VT) (potential transformers (PT)), are known as instrument transformers. When the current in a circuit is too high for direct application to measuring instruments, a current transformer produces a reduced current accurately proportional to the current in the circuit, which can be conveniently connected to measuring and recording instruments [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Electromotive Force Characteristics of Current Transformer According to the Magnetic Properties of Ferromagnetic Core

Kim¹

2015

Transactions on Electrical and Electronic Materials

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The most common structure of the current transformer (CT) consists of a length of wire wrapped many times around a silicon steel ring passed over the circuit being measured. Therefore, the primary circuit of CT consists of a single turn of the conductor, with a secondary circuit of many tens or hundreds of turns. The primary winding may be a permanent part of the current transformer, with a heavy copper bar to carry the current through the magnetic core. However, when the large current flows into a wire, it is difficult to measure its magnitude of current because the core is saturated and the core shows magnetic nonlinear characteristics. Therefore, we proposed a newly designed CT which has an air gap in the core to decrease the generated magnetic flux. Adding the air gap in the magnetic path increases the total magnetic reluctance against the same magnetic motive force (MMF). Using a ferrite core instead of steel also causes the generation of low magnetic flux. These features can protect the magnetic saturation of the CT core compared with the steel core. This technique can help the design of the CT to obtain a special shape and size.

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Characterization and Modeling of a Current Transformer Working Under Thermal Stress

Cited by 9 publications

References 12 publications

On the Importance of Characterizing Virtual PMUs for Hardware-in-the-Loop and Digital Twin Applications

On the Importance of Characterizing Virtual PMUs for Hardware-in-the-Loop and Digital Twin Applications

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

Electromotive Force Characteristics of Current Transformer According to the Magnetic Properties of Ferromagnetic Core

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