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Impulse Impedance Measurements of Lightning Protection Earthings
2019 IEEE PES GTD Grand International Conference and Exposition Asia (GTD Asia), 2019Lightning protection earthing systems should be tested at currents with time parameters similar to those of lightnings. A method and definition of a measured value of impulse impedance are introduced. The impulse impedance was determined by a quotient of voltage drop on the tested earthing to a value of current in measure circuit. The usefulness of the
T. Horchue +3 more
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Discussion of Measurement Methods of Impulse Grounding Impedance
2018 34th International Conference on Lightning Protection (ICLP), 2018The grounding device is very important for lightning protection. However, it is difficult to measure the impulse grounding impedance because the impulse generator is cumbersome and dangerous compared with the device for power frequency test. At the same time it is difficult to generate a lightning current with a suitable waveform due to the inductance ...
Bo Zhang +5 more
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Characterization of human joint impedance during impulsive motion
Journal of Electromyography and Kinesiology, 1993The objective of the present work is to make use of the limited existing information on human joint impedance and to supplement and refine it synthetically, by means of simulation. A modular concept was applied to the construction of a joint model. The basic module was an individual revolute joint which was constrained by four resistive elements.
M, Batman, R, Seliktar
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Transient Impedance of High-Voltage Impulse Generating Systems
IEEE Transactions on Power Apparatus and Systems, 1970The interaction between an impulse generating system and an impulse measuring system is dependent on the reflections that occur at the generator and divider ends of the measuring system lead. In this paper the impedances that cause these reflections are studied and discussed. The effects of the interactions are illustrated with sample oscillograms.
Frank Creed, Malcolm Collins
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Measurement of Impulse Grounding Impedance in Frequency Domain
2010 International Conference on Intelligent System Design and Engineering Application, 2010Impulse grounding impedance cannot be described as an absolute index, because it depends on the characteristic of the impulse current waveform, soil structure type and grounding system configuration, etc. This paper presents a test system to measure the impulse grounding impedance directly in time domain, moreover, calculated and defined in frequency ...
Yang Lin, Jianmin Li, Wu Guangning
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Force-sensorless human joint impedance estimation utilizing impulsive force
Advanced Robotics, 2020The paper is concerned with force-sensorless estimation of human joint impedance utilizing an impulsive force.
K. Yagi, Y. Mori, H. Mochiyama
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Impulse Impedance Measurement Methodology in Space Restricted Locations
2019 International Symposium on Lightning Protection (XV SIPDA), 2019This paper presents the analysis results of field measurements of ground resistance and impulse impedance. First, the Current Derivative Method is presented, whose objective is to obtain the RLF steady-state ground resistance value from the transient impedance curve $Z(t)$.
Adroaldo Raizer +2 more
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Variable Impedance Feed Structure for Impulse Radiating Antenna
2019 International Conference on Electromagnetics in Advanced Applications (ICEAA), 2019We present in this work, an alternative design for the TEM feeding structure of the Impulse Radiating Antenna (IRA). The variation here proposed consists of a set of TEM feeders whose impedance changes as a function of the radial distance measured from the focal point towards the parabolic reflector.
Felix Vega-Stavro +1 more
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Issues Concerning Determination of Impulse Voltage, Current, and Impedance
IEEE Electromagnetic Compatibility Magazine, 2021The paper deals with satisfying the quasi-stationarity (or quasi-static) condition in studies of impulse quantities. The validity of the definition of voltage, current, and immittance is discussed. Examples are given regarding the electromagnetic compatibility issues when the quasi-stationarity condition is not met, thus the basic electric circuit ...
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Impulse Impedance Tests on Laboratory Model Earth Electrode
2005 Asia-Pacific Conference on Applied Electromagnetics, 2006The investigation was carried out with the purpose of obtaining more information about electric discharges in sandy media. A cylindrical setup was chosen for impulse testing of earth rods to simulate the voltage gradients in the field when lightning propagates to earth rod.
N.A. Idris, H. Ahmad, M.N. Isa
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