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Insulation performance of vacuum interrupter after high frequency voltage impulses conditioning
2015 3rd International Conference on Electric Power Equipment – Switching Technology (ICEPE-ST), 2015The conditioning is widely used to enhance the insulation performance of vacuum interrupter, such as current conditioning and spark conditioning. In this paper, we compared the conditioning performance between traditional ones and high frequency voltage impulses conditioning method with their conditioning parameters, such as conditioning voltage ...
Weigang Feng +3 more
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Journal of Physics D: Applied Physics, 2023
Abstract We report several effects found in reactive bipolar high-power impulse magnetron sputtering (abbreviated as bipolar HiPIMS or BPH) discharges at the substrate level. The role of the negative peak current and the positive pulse voltage, U
Michiels, Matthieu +5 more
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Abstract We report several effects found in reactive bipolar high-power impulse magnetron sputtering (abbreviated as bipolar HiPIMS or BPH) discharges at the substrate level. The role of the negative peak current and the positive pulse voltage, U
Michiels, Matthieu +5 more
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2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV), 2016
Vacuum Interrupters (VI's) which are the product of choice at medium voltages for interruption of fault currents are being actively considered and applied at transmission levels also. As the voltage levels increases, so do the stresses. Hence, the high voltage withstand performance of the vacuum interrupter becomes extremely significant and demands ...
Sandeep Kulkarni +3 more
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Vacuum Interrupters (VI's) which are the product of choice at medium voltages for interruption of fault currents are being actively considered and applied at transmission levels also. As the voltage levels increases, so do the stresses. Hence, the high voltage withstand performance of the vacuum interrupter becomes extremely significant and demands ...
Sandeep Kulkarni +3 more
openaire +1 more source
2015 IEEE Eindhoven PowerTech, 2015
High voltage bushing forms an essential part of a power transformer and its insulation condition is of high importance in a transformer's reliability. Transformer failure statistics indicate considerable contribution from bushing failures, which makes the monitoring of power transformer bushings essential.
Roya Nikjoo, Nathaniel Taylor, Hans Edin
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High voltage bushing forms an essential part of a power transformer and its insulation condition is of high importance in a transformer's reliability. Transformer failure statistics indicate considerable contribution from bushing failures, which makes the monitoring of power transformer bushings essential.
Roya Nikjoo, Nathaniel Taylor, Hans Edin
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Electrical Engineering, 2016
In a previously published work, performances of three practical earthing systems consists of 2, 3 and 4 rod-bed electrodes buried at the same site, thus the same soil resistivity were investigated. It was found that the degree of reduction of the earth resistance values is the highest in the poor earthing systems (2 rod electrodes).
Abdullah, Saleha +2 more
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In a previously published work, performances of three practical earthing systems consists of 2, 3 and 4 rod-bed electrodes buried at the same site, thus the same soil resistivity were investigated. It was found that the degree of reduction of the earth resistance values is the highest in the poor earthing systems (2 rod electrodes).
Abdullah, Saleha +2 more
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AIAA Journal, 2015
A tunable diode laser-based H2O absorption diagnostic has been developed to characterize transient phenomena within the Stanford Expansion Tube Flow Facility. A measurement rate of 25 kHz was achieved to identify and investigate transient flow structures within the ∼600 μs facility test time.
Christopher L. Strand, Ronald K. Hanson
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A tunable diode laser-based H2O absorption diagnostic has been developed to characterize transient phenomena within the Stanford Expansion Tube Flow Facility. A measurement rate of 25 kHz was achieved to identify and investigate transient flow structures within the ∼600 μs facility test time.
Christopher L. Strand, Ronald K. Hanson
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IEEE Transactions on Plasma Science, 2016
The objective of this paper is to investigate an influence of high-frequency high-voltage impulse conditioning on the back-to-back capacitor bank switching performance of vacuum interrupters (VIs). Nine identical 7.2-kV VIs were tested by 80 CO operations after the proposed conditioning. Test inrush currents were set to 0-, 2-, and 5-kA peak.
Yingyao Zhang +6 more
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The objective of this paper is to investigate an influence of high-frequency high-voltage impulse conditioning on the back-to-back capacitor bank switching performance of vacuum interrupters (VIs). Nine identical 7.2-kV VIs were tested by 80 CO operations after the proposed conditioning. Test inrush currents were set to 0-, 2-, and 5-kA peak.
Yingyao Zhang +6 more
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Effect of Enhancement Materials When Mixed with Sand Under High Impulse Conditions
2006 IEEE 8th International Conference on Properties and applications of Dielectric Materials, 2006To date, there is no data describing the characteristics of enhancement materials mixed with soils under impulse conditions are published. In this research, it is aimed to investigate the characteristics of enhancement materials, copper sulphate (CuSO4 ) and sodium chloride (NaCl) mixed with soils under impulse ...
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Nondestructive Testing and Evaluation, 2012
This paper is devoted to the description of the double reflection type as an important basic case (as well as single reflection type) and gives some introduction to the phenomenology of elongated reflections in ground-penetrating radar (GPR) diagnostics of bituminous pavement. The single reflections correspond to simple velocity contrast between layers
Lech Krysiński, Jacek Sudyka
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This paper is devoted to the description of the double reflection type as an important basic case (as well as single reflection type) and gives some introduction to the phenomenology of elongated reflections in ground-penetrating radar (GPR) diagnostics of bituminous pavement. The single reflections correspond to simple velocity contrast between layers
Lech Krysiński, Jacek Sudyka
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European Transactions on Electrical Power, 2007
AbstractThe study on the physics of discharges in soil and performance of earthing networks subjected to lightning currents are important in order to improve the reliability of electrical systems and to obtain better electrical models of earthing systems.
Nor, N. Mohamad, Ramli, A.
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AbstractThe study on the physics of discharges in soil and performance of earthing networks subjected to lightning currents are important in order to improve the reliability of electrical systems and to obtain better electrical models of earthing systems.
Nor, N. Mohamad, Ramli, A.
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