Results 141 to 150 of about 1,321 (185)
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Modelling HV reference dividers for lightning impulses
11th International Symposium on High-Voltage Engineering (ISH 99), 1999In this paper a numerical model for the simulation of the performances of HV reference dividers is presented; the model, based on a numerical procedure coupling electric field analysis and electrical circuit, is applied to the analysis of the 200 kV lightning impulse reference divider of the Istituto Elettrotecnico Nazionale Galileo Ferraris in Italy.
BOTTAUSCIO, ORIANO +3 more
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2020
This paper presents an optimization method for the design and analysis of impulse generators according to the requirements of the international standard IEC 60060-1. An optimization algorithm has been developed to calculate the residual inductance in the impulse generator circuit. The optimization approach can calculate the residual inductance which is
Nidhi Chandrakar +2 more
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This paper presents an optimization method for the design and analysis of impulse generators according to the requirements of the international standard IEC 60060-1. An optimization algorithm has been developed to calculate the residual inductance in the impulse generator circuit. The optimization approach can calculate the residual inductance which is
Nidhi Chandrakar +2 more
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Lightning Impulse Ageing of HDPE [PDF]
, 2009 This work is concerned with the hypothesis that lightning impulses can lead to accelerated ageing of extruded polymeric cables. The behaviour of an insulation material when suffering lightning impulses is different from that for DC or power frequency over-voltages. Shaped HDPE material samples have been manufactured using a mould tool. The samples then
Dao, N L, Lewin, P L, Swingler, S G
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Coaxial attenuators for standard lightning impulse measurements
2012 Conference on Precision electromagnetic Measurements, 2012Characteristics of coaxial resistive attenuators of digital instrument for the standard full lightning impulse(LI) measurement are studied. The amplitude - frequency characteristics and the input impedance of two kinds of attenuators are analyzed. An approach to evaluation the scale factor of peak voltage for the attenuators are introduced based on the
Na Liu, Yiye Wu, Jiawei Chen
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Impulse current testing system for simulating lightning effect
2014 International Conference on Audio, Language and Image Processing, 2014This paper introduced the impulse current testing system for simulating lightning effects. The shield method to suppress the interference was addressed in this paper. After compared with three filter methods, it was verified that the wavelet transform is most suitable for measuring the impulse by using the digital filter technology to get the actual ...
Yi Lin, Qibin Zhou
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Lightning Impulse Behavior Of Conducting Composite Electrodes
2006 IEEE Conference on Electrical Insulation and Dielectric Phenomena, 2006During lightning impulse type testing of medium voltage switchgears up to two spark-overs are accepted. Consequently, when selecting conducting composites for use in screens and shields of such equipment it is important that their surfaces not degrade after a spark-over, as this normally will reduce the overall dielectric withstand level.
M. Runde +5 more
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Characterization and Verification of Suitability of a Digitizer for Lightning Impulses
2018 IEEE International Conference on High Voltage Engineering and Application (ICHVE), 2018This paper discusses the requirements and the performance of the recording instruments used in high voltage impulse measurements. The target of high accuracy and in the same time fast settling without creeping behaviour are the key issues of this work. Therefore, one of the most promising digitizers on the market was tested in linearity and temperature
T.-C. SchlUterbusch +3 more
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Metodology for Lightning Impulse Voltage Divisors Design
IEEE Latin America Transactions, 2009This paper presents a design methodology for damped capacitive voltage divider for lightning impulse waves measurement; the methodology includes design verification using three different computational tools (EMTP, MATLAB and ELCUT). The methodology was validated by constructing and testing two 300 kV dividers at the High Voltage Laboratory of the ...
Diego Fernando Garcia Gomez +3 more
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Lightning impulse corona characteristics of conductors and bundles
IEEE Transactions on Power Delivery, 1997The paper describes an experimental study and a computational method of estimating the q-u corona characteristics of single and bundle conductors for conductor-plane and conductor-conductor gaps under lightning impulse voltages. Measurements were performed for individual subconductors in a bundle which provided data necessary for an estimation of ...
G.V. Podporkin, A.D. Sivaev
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Circuit for Impulse Testing of Gas-Tube Lightning Arresters
IEEE Transactions on Communications, 1972Telephone lines may be protected from lightning-induced surges by gas-tube lightning arresters. Typical arresters break down at 250-400 V dc. Breakdown voltage increases with the rate of rise of the applied voltage and may be two or three times the dc value at a rate of rise of 10 kV/μs.
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