Results 11 to 20 of about 69,905 (289)
An Active Ground Fault Location Method for Low-Voltage DC Lines Based on DFFT
Zhongguo dianli, 2023 For the problem of locating ground faults in low-voltage DC cable lines containing power electronic transformers, a single-ended volume fault location method using power electronic transformers with active injection is proposed for rapid fault detection ...
Fulu CAO +4 more
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Infrastructures, 2022 Damage to devices installed in electric substations, which have shown vulnerable behaviour under strong earthquakes in the last decades, may endanger power delivery in the emergency phases during and after an earthquake. Within seismic risk assessment of
Francesco Cavalieri +5 more
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Energies, 2023 Instrument transformers are largely used to measure voltages and currents in public electricity networks. Their performance is essential for Power Quality measurements. Tests and procedures to estimate the effect of single influence factors are performed
Mohamed Agazar +2 more
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Development of ultrahigh‐voltage standard voltage transformer based on series voltage transformer structure [PDF]
IET Science, Measurement & Technology, 2019 An ultrahigh‐voltage standard voltage transformer (VT) based on series voltage transformer (SVT) structure is described. A precise isolation VT is designed to realise the connection between the VTs of an SVT. Moreover, the ratio and errors of the SVT are discussed and calculated to reduce the magnetic error of the isolation VT, and
Zhou Feng +4 more
openaire +1 more source
IEEE Access, 2020 Resonant converters are widely used in high voltage applications thanks to the soft switching technologies. The high frequency and high voltage (HFHV) transformer is the most complicated and important part to boost the voltage by tens or hundreds of ...
Le Deng +4 more
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On the Long-Period Accuracy Behavior of Inductive and Low-Power Instrument Transformers
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 +3 more
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Threshold values determination in high-voltage equipment diagnosis insulation by registration methods of partial discharges [PDF]
Омский научный вестник, 2019 The paper presents theoretical information diagnosing insulation parameters of high-voltage transformers. The results of experimental studies on high-voltage transformers in the normal, pre-emergency and emergency states are shown. The comparison was
A. A. Kuznetsov +3 more
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Single-Phase Five-Level Multilevel Inverter Based on a Transistors Six-Pack Module
Energies, 2022 This article introduces a single-phase five-level multilevel inverter based on six switches and two transformers. The proposed converter requires a single dc input source with low voltage.
Flavio A. Garcia-Santiago +5 more
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Turn-to-turn fault protection technique for synchronous machines without additional voltage transformers [PDF]
, 2017 This paper presents a novel protection technique for the detection of inter-turn faults in synchronous machines. It is based on the calculation of voltage in the stator windings from the usual phases and neutral voltage, typically available in ...
Gyftakis, Konstantinos N. +2 more
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Prediction of remaining life of power transformers based on left truncated and right censored lifetime data [PDF]
, 2008 Prediction of the remaining life of high-voltage power transformers is an important issue for energy companies because of the need for planning maintenance and capital expenditures.
Hong, Yili +4 more
core +7 more sources