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Parameters Determination of Oscillatory Impulse Current Waveform
IEEJ Transactions on Fundamentals and Materials, 2010This paper proposes numerical techniques to distil waveform parameters out of digitally measured data of oscillatory impulse current. The first method, to be used for liner circuit, based on a curve-fitting technique in which a smooth analytical curve is defined to fit the noise-superposed measured data.
Shuji Sato +2 more
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2019
Tests with high impulse currents are performed to simulate the stress of power apparatus in the high-voltage grid caused by lightning and short circuits. Various impulse test currents and the corresponding measurement methods are standardized in IEC 62475, together with DC and AC currents.
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Tests with high impulse currents are performed to simulate the stress of power apparatus in the high-voltage grid caused by lightning and short circuits. Various impulse test currents and the corresponding measurement methods are standardized in IEC 62475, together with DC and AC currents.
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Low-Resistance Shunts for Impulse Currents
IEEE Transactions on Power Apparatus and Systems, 1971In high-voltage technology, plasma physics and power electronics low-ohmic resistors are frequently employed to measure high, rapidly changing currents. Their voltage drop is adversely affected by stray inductances and skin effect. A more complete analysis of low- ohmic tubular type and squirrel cage type resistors including such effects is presented ...
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Wirewound Shunts For Measurement Of Fast Current Impulses
IEEE Transactions on Power Apparatus and Systems, 1984The paper describes the operating principle, design features and measuring characteristics of wirewound shunts. Fast response and reduced thermal-resistance drift are the main goals to be achieved, although a sturdy structure is also required to meet the demands of an industrial laboratory environment.
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200kA Impulse Current Measuring System for SPD
2006 IEEE 8th International Conference on Properties and applications of Dielectric Materials, 2006An auto impulse current measuring system for surge protective device (SPD) with power source was studied, the system was composed of impulse current generator, programmable logical controller (PLC), couple and decouple network (CDN), power tracking circuit and intelligent digital peak measuring instrument.
Jingliang Chen, Xueling Yao, Wei Sun
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Measurement of High-Current Impulses
2013For the conventional measurement of impulse currents during tests of power apparatuses up to a few 100 kA, low-ohmic resistors or magnetic coils are used in combination with digital recorders enabling computer-aided processing of the recorded data.
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Impulse excitation of eddy current probes
AIP Conference Proceedings, 2000Impulse excitation of eddy-current transducers has a number of considerable benefits in comparison with traditional harmonical excitation for the reaction impulse contains a wide range of harmonics, i.e. much more information. Impulse excitation has some special features: the reaction impulse maximum value depends only on geometrical parameters of the ...
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Impulse Current Transformer With a Nanocrystalline Core
IEEE Transactions on Magnetics, 2013The objective of this paper is to propose and to validate the behavior of an impulse current transformer with a nanocrystalline alloy toroidal core. The purpose of this transformer is to measure a current square waveform with a fundamental harmonic frequency of 25 kHz.
R. Prochazka, J. Hlavacek, K. Draxler
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Grounding system models for electric current impulse
Electric Power Systems Research, 2019Abstract In this paper, two electrical models that simulate grounding system responses to current impulses with inductive or capacitive characteristics are presented. The models were elaborated from the analysis of voltage–current curves obtained from field tests.
M.F.B.R. Gonçalves +5 more
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Heavy current impulse discharge in plasma generators
21st International Electric Propulsion Conference, 1990V.N.Zhuravlev,V.A.Kolikov,A.I.Kulishevich,F.G.Rutberg Leningrad, USSR This paper presents the analysis of experimental investigation of helium discharge at maximum current in impulse 1, = 250 kA and current duration r= 250 /Us. The gas initial pressure in a discharge chamber is changed from 100 atm up to 3 250 atm. The chamber volume is 70 cm . Burning
V. ZHURAVLEV +3 more
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