Investigation of the impact of a standard lightning impulse on the structure of an 11/0.415 kV distribution transformer
Sign Up to like & getrecommendations! Published in 2022 at "Electric Power Systems Research"
DOI: 10.1016/j.epsr.2021.107588
Abstract: Abstract In this paper a model has been proposed to investigate the effect of Standard Lightning Impulses at voltages below the Basic Insulation Level (BIL) on winding geometry, based on the extraction of resistances, inductances,… read more here.
Keywords: transformer; standard lightning; lightning impulse; structure ... See more keywords
Partial discharge detection and analysis of needle-plane defect in SF6 under negative oscillating lightning impulse voltage based on UHF method
Sign Up to like & getrecommendations! Published in 2017 at "IEEE Transactions on Dielectrics and Electrical Insulation"
DOI: 10.1109/tdei.2016.005979
Abstract: Gas insulated switchgear (GIS) is used in power system more and more widely. With the increased voltage level of power system, field impulse voltage withstand test becomes increasingly important. It would be beneficial for a… read more here.
Keywords: voltage; detection; lightning impulse; plane defect ... See more keywords
Discussion on lightning impulse test waveform according to breakdown characteristics of SF6 gas gaps
Sign Up to like & getrecommendations! Published in 2017 at "IEEE Transactions on Dielectrics and Electrical Insulation"
DOI: 10.1109/tdei.2017.006605
Abstract: The standard lightning impulse (LI), defined as a smooth full lightning impulse voltage having a front time of 1.2 μs and a time to half-value of 50 μs, obtained from field observation, has remained unchanged… read more here.
Keywords: field; time; insulation; lightning impulse ... See more keywords
Partial discharge characteristics of metallic protrusion in GIS under different lightning impulse voltage waveforms based on UHF method
Sign Up to like & getrecommendations! Published in 2017 at "IEEE Transactions on Dielectrics and Electrical Insulation"
DOI: 10.1109/tdei.2017.006839
Abstract: The field lightning impulse withstand voltage test is an important step to ensure the safe operation of the gas insulated switchgear (GIS). The oscillating lightning impulse voltage is recommended in field test by IEC standard… read more here.
Keywords: voltage; protrusion; lightning impulse; partial discharge ... See more keywords
Breakdown characteristics of transformer oil with cellulose particles in a non-uniform field under lightning impulse voltage
Sign Up to like & getrecommendations! Published in 2020 at "IEEE Transactions on Dielectrics and Electrical Insulation"
DOI: 10.1109/tdei.2020.008892
Abstract: This study presents experimental results on the influence of cellulose particles on the breakdown characteristics of transformer oil in a highly non-uniform field under lightning impulse voltage. The experimental results show that as the particle… read more here.
Keywords: field; breakdown characteristics; voltage; cellulose particles ... See more keywords
Shockwave Characteristics of Streamer Propagation in Insulating Liquids under Positive Lightning Impulse
Sign Up to like & getrecommendations! Published in 2021 at "IEEE Transactions on Dielectrics and Electrical Insulation"
DOI: 10.1109/tdei.2020.009238
Abstract: This paper presents an experimental study focusing on the quantitative analyses of spatial characteristics of Mach-cone shaped shockwaves generated by streamers in a mineral oil and a synthetic ester in a fixed 12 mm needle-plane… read more here.
Keywords: positive lightning; mineral oil; cone shaped; shockwave characteristics ... See more keywords
A Validity Analysis of Extending Front Time in Lightning Impulse Tests for Ultrahigh-Voltage Transformers
Sign Up to like & getrecommendations! Published in 2020 at "IEEE Transactions on Power Delivery"
DOI: 10.1109/tpwrd.2019.2919733
Abstract: High entrance capacitances of ultrahigh-voltage (UHV) transformers make it difficult to generate impulses with standard front time during the lightning impulse tests. In this paper, we discuss the feasibility of examining the longitudinal insulation design… read more here.
Keywords: time; impulse tests; voltage; insulation ... See more keywords
Effects of a Crossarm Brace Application on a 275 kV Fiberglass-Reinforced Polymer Crossarm Subjected to a Lightning Impulse
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DOI: 10.3390/en13236248
Abstract: The crossarm is an important component of transmission towers, providing insulation for transmission lines at different voltage ratings. Recently, composite crossarms were widely used as a composite tower component and were found to be the… read more here.
Keywords: brace; reinforced polymer; lightning impulse; fiberglass reinforced ... See more keywords
Lightning Impulse Overvoltage Propagation in HVDC Meshed Grid
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DOI: 10.3390/en14113047
Abstract: This paper reports on the propagation of lightning overvoltage in a high-voltage direct current (HVDC) meshed grid. Since several topologies of meshed grids have been elaborated in the last decade, we used a common comprehensive… read more here.
Keywords: propagation; hvdc meshed; overvoltage; lightning impulse ... See more keywords