Results 11 to 20 of about 157,516 (285)
DC-compensated current transformer [PDF]
2014 IEEE International Instrumentation and Measurement Technology Conference (I2MTC) Proceedings, 2014 Instrument current transformers (CTs) measure AC currents. The DC component in the measured current can saturate the transformer and cause gross error. We use fluxgate detection and digital feedback compensation of the DC flux to suppress the overall error to 0.15%.
Pavel Ripka +2 more
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Energies, 2021 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 into
Elzbieta Lesniewska
doaj +1 more source
Shielded Electronic Current Transformer [PDF]
IEEE Transactions on Instrumentation and Measurement, 2004 A current transformer with nominal ratio 10 A to 10 mA, intended for low-frequency applications, was developed. It includes an electronic device to reduce the magnetizing current, and a continuous shield in the secondary winding (coaxial cable) in order to eliminate the effect of stray capacitances. No guard-source is connected to the shield.
Slomovitz, Daniel, de Souza, Heriguatí
openaire +2 more sources
Simulation of longitudinal differential protection of transmission lines with additional stabilization and APU system [PDF]
Tehnika, 2016 This paper explains the algorithm for the longitudinal differential protection of transmission lines with automatic reclosing. Classic stabilization is not sufficient for avoiding of unnecessary operations caused by saturation of current transformer ...
Rajić Tomislav D., Stojanović Zoran N.
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Вестник Северо-Кавказского федерального университета, 2022 Despite the fact that the problem of saturation of current transformers (CT) has been known for a long time, it has not lost its relevance now. Cases of malfunctioning as a result of oversaturation of CT are still recorded today.
P. Shagimardanov
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The Journal of Engineering, 2018 On the basis of the principle of breaker failure protection delay and the analysis of the main factors which affect the protection, a sub-station-area breaker failure and dead-zone protection technical scheme based on the current differential principle ...
Baowei Li +4 more
doaj +1 more source
IET Generation, Transmission & Distribution, 2023 Partial discharge is one of the main reasons for insulation degradation in high‐voltage apparatuses. Partial discharge is an ineluctable phenomenon that happens when a high electrical field is adjacent to an insulator. High‐frequency current transformers
Hamidreza Besharatifard +3 more
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Countermeasure to Prevent Transformer Differential Protection From False Operations
IEEE Access, 2023 The reliability of the transformer differential protection is under threat from multiple interferences, including the inrush condition, the current transformer saturation condition, and the arc fault condition.
Penghui Liu +5 more
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The Journal of Engineering, 2019 The Rogowski coil current transformer is widely used in intelligent substations for its rapid response, wide bandwidth measurement, and non-magnetic saturation.
Fubin Pang +3 more
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AIP Advances, 2023 As an important high-voltage electrical equipment in the substation, the performance stability of high-voltage current transformers is directly related to the safe operation of the power grid. The insulating medium of the traditional oil-immersed current
Zhao Fang +6 more
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