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Space Charge Accumu...
Space Charge Accumulation at Material Interfaces in HVDC Cable Insulation Part II - Simulations of Charge Transport
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- Doedens, Espen, 1988 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,Nexans
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- Jarvid, E. Markus (författare)
- Nexans
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- Guffond, Raphaël (författare)
- Nexans
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- Serdyuk, Yuriy, 1963 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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(creator_code:org_t)
- 2020-04-06
- 2020
- Engelska.
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Ingår i: Energies. - : MDPI AG. - 1996-1073 .- 1996-1073. ; 13:7, s. 1750-1774
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https://doi.org/10.3...
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Abstract
Ämnesord
Stäng
- Extruded high voltage direct current (HVDC) cable systems contain interfaces with poorly understood microscopic properties, particularly surface roughness. Modelling the effect of roughness on conduction in cable insulation is challenging, as the available results of macroscopic measurements give little information about microscopic charge distributions at material interfaces. In this work, macroscopic charge injection from interfaces is assessed by using a bipolar charge transport model, which is validated against a series of space charge measurements on cable peelings with different degrees of surface roughness. The electric field-dependent conduction and charge trapping effects stimulated by the injection current originating from rough surfaces are assessed. It is shown that by accounting for roughness enhanced charge injection with the parameters derived in part I of the paper, reasonable agreement between computed and measured results can be achieved at medium field strengths (10–40 kV/mm).
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Annan elektroteknik och elektronik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Other Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)
Nyckelord
- bipolar charge transport
- roughness enhanced charge injection
- hopping
- detrapping
- surface roughness
- electrical conduction
- charge packets
- trapping
- charge injection
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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