Influence of applied voltage on space charge formation and accumulation characteristics of low density polyethylene

Yuanwei Zhu; Shengtao Li; Daomin Min; Guochang Li; Wencheng Wu; Weiwei Li

doi:10.1109/ICSD.2013.6619858

Influence of applied voltage on space charge formation and accumulation characteristics of low density polyethylene

Yuanwei Zhu, Shengtao Li, Daomin Min, Guochang Li, Wencheng Wu, Weiwei Li

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

1 Citation (Scopus)

Abstract

Low density polyethylene (LDPE) has been widely applied on high voltage transmission cables due to its excellent insulating properties, good processability and chemical stability. Large numbers of experimental and theoretical studies have shown that space charge plays an important role in aging and breakdown in LDPE, and the applied voltage can significantly impact charge transport characteristic and space charge formation and accumulation in LDPE. By solving Schottky thermal emission equation, charge continuity equation and Poisson's equation, simulate space charge injection and accumulation phenomenon in LDPE under different applied voltages (0.4 kV-8 kV). The results show that: in a 1×10^-4 m LDPE sample, space charge accumulation starts at the applied voltage of about 2 kV. The number of trapped electrons, free electrons and total amount of electrons all increase as the applied voltage goes higher. The higher the applied voltage, the faster the trapped electrons and total amount of electrons reach their stability. The space charge accumulation rate is fast before the injected electrons reach the anode, and slows down significantly after injected into the anode. The model has an important significance for in-depth studies to research and assess the LDPE insulating properties.

Original language	English
Title of host publication	Proceedings of IEEE International Conference on Solid Dielectrics, ICSD
Pages	417-420
Number of pages	4
DOIs	https://doi.org/10.1109/ICSD.2013.6619858
Publication status	Published - 2013
Externally published	Yes
Event	ICSD 2013 - Proceedings of the 2013 IEEE International Conference on Solid Dielectrics - Bologna, Italy Duration: 2013 Jun 30 → 2013 Jul 4

Other

Other	ICSD 2013 - Proceedings of the 2013 IEEE International Conference on Solid Dielectrics
Country/Territory	Italy
City	Bologna
Period	13/6/30 → 13/7/4

Keywords

applied voltage
low density polyethylene (LDPE)
space charge
uni-polar charge transport model

ASJC Scopus subject areas

Electrical and Electronic Engineering
Electronic, Optical and Magnetic Materials
Materials Chemistry
Condensed Matter Physics

Access to Document

10.1109/ICSD.2013.6619858

Cite this

Zhu, Y, Li, S, Min, D, Li, G, Wu, W & Li, W 2013, Influence of applied voltage on space charge formation and accumulation characteristics of low density polyethylene. in Proceedings of IEEE International Conference on Solid Dielectrics, ICSD., 6619858, pp. 417-420, ICSD 2013 - Proceedings of the 2013 IEEE International Conference on Solid Dielectrics, Bologna, Italy, 13/6/30. https://doi.org/10.1109/ICSD.2013.6619858

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title = "Influence of applied voltage on space charge formation and accumulation characteristics of low density polyethylene",

abstract = "Low density polyethylene (LDPE) has been widely applied on high voltage transmission cables due to its excellent insulating properties, good processability and chemical stability. Large numbers of experimental and theoretical studies have shown that space charge plays an important role in aging and breakdown in LDPE, and the applied voltage can significantly impact charge transport characteristic and space charge formation and accumulation in LDPE. By solving Schottky thermal emission equation, charge continuity equation and Poisson's equation, simulate space charge injection and accumulation phenomenon in LDPE under different applied voltages (0.4 kV-8 kV). The results show that: in a 1×10-4 m LDPE sample, space charge accumulation starts at the applied voltage of about 2 kV. The number of trapped electrons, free electrons and total amount of electrons all increase as the applied voltage goes higher. The higher the applied voltage, the faster the trapped electrons and total amount of electrons reach their stability. The space charge accumulation rate is fast before the injected electrons reach the anode, and slows down significantly after injected into the anode. The model has an important significance for in-depth studies to research and assess the LDPE insulating properties.",

keywords = "applied voltage, low density polyethylene (LDPE), space charge, uni-polar charge transport model",

author = "Yuanwei Zhu and Shengtao Li and Daomin Min and Guochang Li and Wencheng Wu and Weiwei Li",

year = "2013",

doi = "10.1109/ICSD.2013.6619858",

language = "English",

isbn = "9781479908073",

pages = "417--420",

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note = "ICSD 2013 - Proceedings of the 2013 IEEE International Conference on Solid Dielectrics ; Conference date: 30-06-2013 Through 04-07-2013",

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T1 - Influence of applied voltage on space charge formation and accumulation characteristics of low density polyethylene

AU - Zhu, Yuanwei

AU - Li, Shengtao

AU - Min, Daomin

AU - Li, Guochang

AU - Wu, Wencheng

AU - Li, Weiwei

PY - 2013

Y1 - 2013

N2 - Low density polyethylene (LDPE) has been widely applied on high voltage transmission cables due to its excellent insulating properties, good processability and chemical stability. Large numbers of experimental and theoretical studies have shown that space charge plays an important role in aging and breakdown in LDPE, and the applied voltage can significantly impact charge transport characteristic and space charge formation and accumulation in LDPE. By solving Schottky thermal emission equation, charge continuity equation and Poisson's equation, simulate space charge injection and accumulation phenomenon in LDPE under different applied voltages (0.4 kV-8 kV). The results show that: in a 1×10-4 m LDPE sample, space charge accumulation starts at the applied voltage of about 2 kV. The number of trapped electrons, free electrons and total amount of electrons all increase as the applied voltage goes higher. The higher the applied voltage, the faster the trapped electrons and total amount of electrons reach their stability. The space charge accumulation rate is fast before the injected electrons reach the anode, and slows down significantly after injected into the anode. The model has an important significance for in-depth studies to research and assess the LDPE insulating properties.

AB - Low density polyethylene (LDPE) has been widely applied on high voltage transmission cables due to its excellent insulating properties, good processability and chemical stability. Large numbers of experimental and theoretical studies have shown that space charge plays an important role in aging and breakdown in LDPE, and the applied voltage can significantly impact charge transport characteristic and space charge formation and accumulation in LDPE. By solving Schottky thermal emission equation, charge continuity equation and Poisson's equation, simulate space charge injection and accumulation phenomenon in LDPE under different applied voltages (0.4 kV-8 kV). The results show that: in a 1×10-4 m LDPE sample, space charge accumulation starts at the applied voltage of about 2 kV. The number of trapped electrons, free electrons and total amount of electrons all increase as the applied voltage goes higher. The higher the applied voltage, the faster the trapped electrons and total amount of electrons reach their stability. The space charge accumulation rate is fast before the injected electrons reach the anode, and slows down significantly after injected into the anode. The model has an important significance for in-depth studies to research and assess the LDPE insulating properties.

KW - applied voltage

KW - low density polyethylene (LDPE)

KW - space charge

KW - uni-polar charge transport model

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AN - SCOPUS:84891593728

SN - 9781479908073

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BT - Proceedings of IEEE International Conference on Solid Dielectrics, ICSD

T2 - ICSD 2013 - Proceedings of the 2013 IEEE International Conference on Solid Dielectrics

Y2 - 30 June 2013 through 4 July 2013

ER -

Influence of applied voltage on space charge formation and accumulation characteristics of low density polyethylene

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