Charge Accumulation in the Homo-Crosslinked-Polyethylene Bilayer
The homo-crosslinked-polyethylene (H-XLPE) bilayer simplifies the returned insulation structure of the factory joint in submarine cables, and its dielectric property is key to the reliability of the power transmission system. In this paper, we investigated the charge accumulation phenomenon in a sec...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-04-01
|
| Series: | Materials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1944/15/9/3024 |
| _version_ | 1797504094388092928 |
|---|---|
| author | Wei Zhao Huaqiang Li Wenpeng Li Xin Chen Lisheng Zhong Jinghui Gao |
| author_facet | Wei Zhao Huaqiang Li Wenpeng Li Xin Chen Lisheng Zhong Jinghui Gao |
| author_sort | Wei Zhao |
| collection | DOAJ |
| description | The homo-crosslinked-polyethylene (H-XLPE) bilayer simplifies the returned insulation structure of the factory joint in submarine cables, and its dielectric property is key to the reliability of the power transmission system. In this paper, we investigated the charge accumulation phenomenon in a secondary thermocompression H-XLPE bilayer using the pulse electro-acoustic method. The charge accumulation reduces its overall breakdown strength when compared with XLPE. According to X-ray diffraction measurement and thermal analysis results, the specimen forms a homo-junction region between the bilayers, which has overlapping spherulites with a thick lamella, high crystallinity, and high surface free energy. The charge accumulation can be ascribed to fused lamellas and the crystal imperfection of the homo-junction region, which restricts the charge transport process and exhibits a higher number of deep traps. This study emphasizes the importance of the homo-junction region in the H-XLPE bilayer, which should be considered in the design and operation of factory joint insulation. |
| first_indexed | 2024-03-10T03:59:45Z |
| format | Article |
| id | doaj.art-ac40ee8de6cf4e67b85d81332ecb3b3e |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T03:59:45Z |
| publishDate | 2022-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-ac40ee8de6cf4e67b85d81332ecb3b3e2023-11-23T08:37:00ZengMDPI AGMaterials1996-19442022-04-01159302410.3390/ma15093024Charge Accumulation in the Homo-Crosslinked-Polyethylene BilayerWei Zhao0Huaqiang Li1Wenpeng Li2Xin Chen3Lisheng Zhong4Jinghui Gao5State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an 710049, ChinaState Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an 710049, ChinaState Grid Smart Grid Research Institute Co., Ltd., Beijing 102202, ChinaState Grid Smart Grid Research Institute Co., Ltd., Beijing 102202, ChinaState Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an 710049, ChinaState Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an 710049, ChinaThe homo-crosslinked-polyethylene (H-XLPE) bilayer simplifies the returned insulation structure of the factory joint in submarine cables, and its dielectric property is key to the reliability of the power transmission system. In this paper, we investigated the charge accumulation phenomenon in a secondary thermocompression H-XLPE bilayer using the pulse electro-acoustic method. The charge accumulation reduces its overall breakdown strength when compared with XLPE. According to X-ray diffraction measurement and thermal analysis results, the specimen forms a homo-junction region between the bilayers, which has overlapping spherulites with a thick lamella, high crystallinity, and high surface free energy. The charge accumulation can be ascribed to fused lamellas and the crystal imperfection of the homo-junction region, which restricts the charge transport process and exhibits a higher number of deep traps. This study emphasizes the importance of the homo-junction region in the H-XLPE bilayer, which should be considered in the design and operation of factory joint insulation.https://www.mdpi.com/1996-1944/15/9/3024homo-crosslinked-polyethylene bilayercharge accumulationhomo-junction regionfactory joint return insulation |
| spellingShingle | Wei Zhao Huaqiang Li Wenpeng Li Xin Chen Lisheng Zhong Jinghui Gao Charge Accumulation in the Homo-Crosslinked-Polyethylene Bilayer Materials homo-crosslinked-polyethylene bilayer charge accumulation homo-junction region factory joint return insulation |
| title | Charge Accumulation in the Homo-Crosslinked-Polyethylene Bilayer |
| title_full | Charge Accumulation in the Homo-Crosslinked-Polyethylene Bilayer |
| title_fullStr | Charge Accumulation in the Homo-Crosslinked-Polyethylene Bilayer |
| title_full_unstemmed | Charge Accumulation in the Homo-Crosslinked-Polyethylene Bilayer |
| title_short | Charge Accumulation in the Homo-Crosslinked-Polyethylene Bilayer |
| title_sort | charge accumulation in the homo crosslinked polyethylene bilayer |
| topic | homo-crosslinked-polyethylene bilayer charge accumulation homo-junction region factory joint return insulation |
| url | https://www.mdpi.com/1996-1944/15/9/3024 |
| work_keys_str_mv | AT weizhao chargeaccumulationinthehomocrosslinkedpolyethylenebilayer AT huaqiangli chargeaccumulationinthehomocrosslinkedpolyethylenebilayer AT wenpengli chargeaccumulationinthehomocrosslinkedpolyethylenebilayer AT xinchen chargeaccumulationinthehomocrosslinkedpolyethylenebilayer AT lishengzhong chargeaccumulationinthehomocrosslinkedpolyethylenebilayer AT jinghuigao chargeaccumulationinthehomocrosslinkedpolyethylenebilayer |