Results 271 to 280 of about 749,140 (312)
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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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Achievements in the Measurement of Tower-footing Impulse Impedance of Transmission Lines
International Conference on Logic Programming, 2018This paper presents results obtained from field measurements of tower-footing impulse impedance carried out in real transmission lines. Tests were performed using an impulsive voltage generator, measuring the ground potential rise and the impressed ...
S. Visacro +2 more
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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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IEEE transactions on power electronics, 2020
Grid impedance information occupies a fundamental and crucial position for the operation of grid-tied converters. Consequently, accurate and fast extraction of grid impedance is vital. The impulse injection method applied under the control loop of a grid-
Zipeng Liu, Jinjun Liu, Zeng Liu
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Grid impedance information occupies a fundamental and crucial position for the operation of grid-tied converters. Consequently, accurate and fast extraction of grid impedance is vital. The impulse injection method applied under the control loop of a grid-
Zipeng Liu, Jinjun Liu, Zeng Liu
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IEEE Transactions on Power Delivery, 2020
To analyze interference induced by transient overvoltage, this article proposes an impulse injection technique for determining the impedance of a high-voltage air-core reactor over a wide frequency range.
Yu-hao Chen +6 more
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To analyze interference induced by transient overvoltage, this article proposes an impulse injection technique for determining the impedance of a high-voltage air-core reactor over a wide frequency range.
Yu-hao Chen +6 more
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Online Monitoring of the Cable Insulation State Based on the Impulse Impedance Spectrum
IEEE Transactions on Instrumentation and MeasurementThe rapid development of power systems has raised the requirements of the online monitoring of cable insulation performance. Considering that a signal extracted using traditional online monitoring technology is weak and vulnerable to environmental ...
P. Meng +5 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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An impulse voltage calibrator of low output impedance
IEEE Transactions on Power Delivery, 2005A calibrator that produces full lightning impulses and chopped lightning impulses with variable chopping time is described. The calibrator uses series-connected power metal-oxide field-effect transistors as the main impulse switch and insulated gate bipolar transistors (IGBTs) as the chopping switch, and its output impedance is low to drive a ...
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Earthquake spectra, 2019
This paper proposed a novel dynamic structural analysis of a single-degree-of-freedom system considering soil–structure interaction (SSI). The z-transferred discrete-time infinite impulse response filter serving as a foundation–soil impedance function to
Y. Sung, Chieh-Cheng Chen
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This paper proposed a novel dynamic structural analysis of a single-degree-of-freedom system considering soil–structure interaction (SSI). The z-transferred discrete-time infinite impulse response filter serving as a foundation–soil impedance function to
Y. Sung, Chieh-Cheng Chen
semanticscholar +1 more source