An Improved Statistical Method for Calculating Lightning Overvoltages in HVDC Overhead Line/Cable Systems
Document identifier: oai:DiVA.org:ltu-75965
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10.3390/en12163121Keyword: Engineering and Technology,
Electrical Engineering, Electronic Engineering, Information Engineering,
Other Electrical Engineering, Electronic Engineering, Information Engineering,
Teknik och teknologier,
Elektroteknik och elektronik,
Annan elektroteknik och elektronik,
HVDC,
Cable,
Overhead line,
Lightning,
Overvoltage,
MTBF,
Electric Power Engineering,
ElkraftteknikPublication year: 2019Abstract: HVDC cable systems connected to HVDC overhead lines are subject to fast front overvoltages emanating from the line when lightning strikes a shield wire (backflashover) or a pole conductor (shielding failure). Representative fast front overvoltage levels for HVDC cable systems are usually established without considering their statistical characteristics. A statistical method to determine overvoltages related to the acceptable mean time between failure (MTBF) for the cable system was developed previously. The method accounts for the statistical distribution of lightning current magnitudes as well as the attenuation of the overvoltage wave due to corona discharges on the line, since this effect dominates for system voltages up to about ±320 kV. To make the method suitable for higher system voltages as well, this article introduces an improved statistical method which also accounts for surge attenuation through resistive effects, soil ionization, and statistical treatment of overvoltages due to shielding failures. To illustrate the improved method, it is applied to a case study for a ±525 kV DC line.
Authors
Oscar Lennerhag
Independent Insulation Group Sweden AB, Ludvika, Sweden
Other publications
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Jan Lundquist
Independent Insulation Group Sweden AB, Ludvika, Sweden
Other publications
>>
Christiaan Engelbrecht
Engelbrecht Consulting B.V., The Netherlands
Other publications
>>
Tanumay Karmokar
NKT HV Cables AB, Lyckeby, Sweden
Other publications
>>
Math Bollen
Luleå tekniska universitet; Energivetenskap; Engineering Sciences and Mathematics, Luleå University of Technology, Skellefteå, Sweden
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>>
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identifier: oai:DiVA.org:ltu-75965
datestamp: 2021-04-19T12:42:06Z
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recordCreationDate: 2019-09-11
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10.3390/en12163121
2-s2.0-85071227522
titleInfo:
@attributes:
lang: eng
title: An Improved Statistical Method for Calculating Lightning Overvoltages in HVDC Overhead Line/Cable Systems
abstract: HVDC cable systems connected to HVDC overhead lines are subject to fast front overvoltages emanating from the line when lightning strikes a shield wire (backflashover) or a pole conductor (shielding failure). Representative fast front overvoltage levels for HVDC cable systems are usually established without considering their statistical characteristics. A statistical method to determine overvoltages related to the acceptable mean time between failure (MTBF) for the cable system was developed previously. The method accounts for the statistical distribution of lightning current magnitudes as well as the attenuation of the overvoltage wave due to corona discharges on the line since this effect dominates for system voltages up to about ±320 kV. To make the method suitable for higher system voltages as well this article introduces an improved statistical method which also accounts for surge attenuation through resistive effects soil ionization and statistical treatment of overvoltages due to shielding failures. To illustrate the improved method it is applied to a case study for a ±525 kV DC line.
subject:
@attributes:
lang: eng
authority: uka.se
topic:
Engineering and Technology
Electrical Engineering Electronic Engineering Information Engineering
Other Electrical Engineering Electronic Engineering Information Engineering
@attributes:
lang: swe
authority: uka.se
topic:
Teknik och teknologier
Elektroteknik och elektronik
Annan elektroteknik och elektronik
@attributes:
lang: eng
topic: HVDC
@attributes:
lang: eng
topic: cable
@attributes:
lang: eng
topic: overhead line
@attributes:
lang: eng
topic: lightning
@attributes:
lang: eng
topic: overvoltage
@attributes:
lang: eng
topic: MTBF
@attributes:
lang: eng
authority: ltu
topic: Electric Power Engineering
genre: Research subject
@attributes:
lang: swe
authority: ltu
topic: Elkraftteknik
genre: Research subject
language:
languageTerm: eng
genre:
publication/journal-article
ref
note:
Published
5
Validerad;2019;Nivå 2;2019-09-11 (johcin)
name:
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type: personal
authority: ltu
namePart:
Lennerhag
Oscar
1989-
role:
roleTerm: aut
affiliation: Independent Insulation Group Sweden AB Ludvika Sweden
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osclen
0000-0002-0417-6404
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namePart:
Lundquist
Jan
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roleTerm: aut
affiliation: Independent Insulation Group Sweden AB Ludvika Sweden
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Engelbrecht
Christiaan
role:
roleTerm: aut
affiliation: Engelbrecht Consulting B.V. The Netherlands
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type: personal
namePart:
Karmokar
Tanumay
role:
roleTerm: aut
affiliation: NKT HV Cables AB Lyckeby Sweden
@attributes:
type: personal
authority: ltu
namePart:
Bollen
Math
role:
roleTerm: aut
affiliation:
Luleå tekniska universitet
Energivetenskap
Engineering Sciences and Mathematics Luleå University of Technology Skellefteå Sweden
nameIdentifier:
matbol
0000-0003-4074-9529
originInfo:
dateIssued: 2019
publisher: MDPI
relatedItem:
@attributes:
type: host
titleInfo:
title: Energies
identifier:
1996-1073
1996-1073
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detail:
@attributes:
type: volume
number: 12
@attributes:
type: issue
number: 16
@attributes:
type: artNo
number: 3121
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form: print
typeOfResource: text