Characterizing trap distribution in LDPE and HDPE based on isothermal surface potential decay measurement

Mengjia Liu, Fusheng Zhou, Zhengzheng Chen, Jianying Li, Daomin Min, Shengtao Li, Qian Li, Rong Xia

研究成果: Article

9 引用 (Scopus)

抄録

Space charge accumulation plays an important role in the service life and the safe operation of DC cables. Focusing on the distribution character of trapped charges and the traps within polyethylene is of great significance to control the space charge accumulation and improve the safe reliable operation of the DC cables. In this paper, isothermal surface potential decay (ISPD) model which considered the detrapping process of charges in polymeric materials was presented. The surface potential decay properties of low-density polyethylene (LDPE) and high-density polyethylene (HDPE) films were measured under the condition of positive and negative corona charging, respectively. Combining the ISPD model, the trap distribution of LDPE and HDPE were obtained and analyzed according to their morphological characteristics. The results show that there are mainly deep trapped charges in these two materials. And the trap density is nearly 1021 m-3, which is consistent with other reported literatures. The density of shallow traps in LDPE is higher than that in HDPE, while the density of the deep traps is lower. In LDPE, the density of electron-type shallow traps is lower than hole-type shallow ones, while the electron-type deep traps is higher than that of hole-type deep ones. It is indicated that the unique aggregation structure of LDPE/HDPE and different performances of electron/hole conduction may have a significant role in determining the distribution of trapped charges.

元の言語English
ページ(範囲)285-291
ページ数7
ジャーナルZhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering
36
発行部数1
DOI
出版物ステータスPublished - 2016 1 5
外部発表Yes

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Surface potential
Low density polyethylenes
High density polyethylenes
Electric space charge
Electrons
Cables
Service life
Polyethylenes
Agglomeration
Polymers

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

これを引用

Characterizing trap distribution in LDPE and HDPE based on isothermal surface potential decay measurement. / Liu, Mengjia; Zhou, Fusheng; Chen, Zhengzheng; Li, Jianying; Min, Daomin; Li, Shengtao; Li, Qian; Xia, Rong.

:: Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering, 巻 36, 番号 1, 05.01.2016, p. 285-291.

研究成果: Article

Liu, Mengjia ; Zhou, Fusheng ; Chen, Zhengzheng ; Li, Jianying ; Min, Daomin ; Li, Shengtao ; Li, Qian ; Xia, Rong. / Characterizing trap distribution in LDPE and HDPE based on isothermal surface potential decay measurement. :: Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering. 2016 ; 巻 36, 番号 1. pp. 285-291.
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abstract = "Space charge accumulation plays an important role in the service life and the safe operation of DC cables. Focusing on the distribution character of trapped charges and the traps within polyethylene is of great significance to control the space charge accumulation and improve the safe reliable operation of the DC cables. In this paper, isothermal surface potential decay (ISPD) model which considered the detrapping process of charges in polymeric materials was presented. The surface potential decay properties of low-density polyethylene (LDPE) and high-density polyethylene (HDPE) films were measured under the condition of positive and negative corona charging, respectively. Combining the ISPD model, the trap distribution of LDPE and HDPE were obtained and analyzed according to their morphological characteristics. The results show that there are mainly deep trapped charges in these two materials. And the trap density is nearly 1021 m-3, which is consistent with other reported literatures. The density of shallow traps in LDPE is higher than that in HDPE, while the density of the deep traps is lower. In LDPE, the density of electron-type shallow traps is lower than hole-type shallow ones, while the electron-type deep traps is higher than that of hole-type deep ones. It is indicated that the unique aggregation structure of LDPE/HDPE and different performances of electron/hole conduction may have a significant role in determining the distribution of trapped charges.",
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AB - Space charge accumulation plays an important role in the service life and the safe operation of DC cables. Focusing on the distribution character of trapped charges and the traps within polyethylene is of great significance to control the space charge accumulation and improve the safe reliable operation of the DC cables. In this paper, isothermal surface potential decay (ISPD) model which considered the detrapping process of charges in polymeric materials was presented. The surface potential decay properties of low-density polyethylene (LDPE) and high-density polyethylene (HDPE) films were measured under the condition of positive and negative corona charging, respectively. Combining the ISPD model, the trap distribution of LDPE and HDPE were obtained and analyzed according to their morphological characteristics. The results show that there are mainly deep trapped charges in these two materials. And the trap density is nearly 1021 m-3, which is consistent with other reported literatures. The density of shallow traps in LDPE is higher than that in HDPE, while the density of the deep traps is lower. In LDPE, the density of electron-type shallow traps is lower than hole-type shallow ones, while the electron-type deep traps is higher than that of hole-type deep ones. It is indicated that the unique aggregation structure of LDPE/HDPE and different performances of electron/hole conduction may have a significant role in determining the distribution of trapped charges.

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