Results 161 to 170 of about 1,350 (191)

Tests with High Lightning and Switching Impulse Voltages

2014
Lightning impulse (LI) over-voltages and switching impulse (SI) over-voltages are caused by direct or indirect lightning strokes or by switching operations in electric power systems, respectively. They cause transient stresses to the insulations, much higher than the stresses due to the operational voltages.
Wolfgang Hauschild, Eberhard Lemke
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Lightning Impulse Breakdown Characteristics of Frozen Soil

IEEE Transactions on Power Delivery, 2008
The impulse characteristics of frozen soil are the fundament for the lightning protection design of the overhead transmission lines in frozen soil environments. In this paper, the conductivity and lightning impulse breakdown characteristics of the frozen soil were experimentally studied, and those key factors influencing the impulse breakdown ...
null Jinliang He, null Baoping Zhang, null Peng Kang, null Rong Zeng, null Bo Zhang   +4 more
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Nonlinear Interpretation Technique for Lightning Impulse Test

IEEE Transactions on Power Delivery, 2015
The nonlinear interpretation technique is proposed to detect the fault in transformer windings during the impulse test. To prove feasibility of the proposed technique, 90-MVA 220/110-kV, 250-MVA 500/275/33-kV transformers, and a 22-kV interleaved winding are used.
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Development of lightning electromagnetic impulse simulator on buildings

2010 Asia-Pacific International Symposium on Electromagnetic Compatibility, 2010
In this paper, we report the development of lightning electromagnetic impulse simulator on buildings. This simulator is linked with the counting code VSTL (Virtual Surge Test Lab.) based on the FDTD (Finite Difference Time Domain) method being developed by Central Research Institute of Electric Power Industry.
Hajime Uchida, Yoshiaki Mori, Nobusato Kobayashi, Shinji Yanai, Tetsuo Endo, Yuichi Takahashi, Kaname Yonezawa, Teruo Idogawa, Masaaki Sato, Shuji Higashi   +9 more
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Development of the lightning measure technique and applications using lightning electromagnetic impulse simulator

2012 International Conference on Lightning Protection (ICLP), 2012
We have developed the electromagnetic impulse simulator by FDTD method (Finite Difference Time Domain Method), in order to analyze the situation of current diversion and the effects of electromagnetic field in the building by lightning strikes. Also we have experimented using the 1/4 scale model of a 3-story building. The situation of current diversion
Teruo Idogawa, Yuichi Takahashi, Kaname Yonezawa, Masaaki Sato, Hajime Uchida, Nobusato Kobayashi, Tetsuo Endo   +6 more
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Lightning Impulse Ageing of HV Cable Insulation [PDF]

, 2009
Lightning impulses can lead to accelerated ageing of extruded cables. Electrical behaviour of a dielectric material when experiencing a lightning impulse is different to that for DC or power frequency applied voltages. Pre-designed shaped HDPE material samples have been manufactured using a mould tool. The samples then have been electrically aged using
Dao, N L, Lewin, P L, Swingler, S G
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A Review of Dielectric Strength with Distorted Lightning Impulses

2016
Non-standard and distorted lightning impulse voltages are often actual dielectric stresses on high voltage insulation, either in laboratory tests or in service. The standard lightning impulse 1,2/50 s conveniently allows comparing the results obtained in different laboratories.
Diaz, Ricardo Ruben, Silva, J. N.
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The effects of non-standard lightning impulse on electrical insulation: a review

Electrical Engineering, 2022
Arup Kumar Das, Sovan Dalai, Pradipta Ghosh   +2 more
exaly  

Investigation of the dehydration effects of lightning impulses

2014 International Conference on Lightning Protection (ICLP), 2014
D. R. Cornish, Y-C. H. Lee, M. von Poser, K. J. Nixon, I. R. Jandrell   +4 more
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Lightning impulse withstand of SF

Eighth International Conference on Dielectric Materials, Measurements and Applications, 2000
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