Charge Carriers Relaxation Behavior of Cellulose Polymer Insulation Used in Oil Immersed Bushing
Cellulose insulation polymer material is widely used in oil immersed bushing. Moisture is one of the important reasons for the deterioration of cellulose polymer insulation, which seriously threatens the safe and stable operation of bushing. It is significant to study the polarization and depolariza...
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-01-01
|
| Series: | Polymers |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4360/14/2/336 |
| _version_ | 1797490908189425664 |
|---|---|
| author | Yu Shang Qiang Liu Chen Mao Sen Wang Fan Wang Zheng Jian Shilin Shi Jian Hao |
| author_facet | Yu Shang Qiang Liu Chen Mao Sen Wang Fan Wang Zheng Jian Shilin Shi Jian Hao |
| author_sort | Yu Shang |
| collection | DOAJ |
| description | Cellulose insulation polymer material is widely used in oil immersed bushing. Moisture is one of the important reasons for the deterioration of cellulose polymer insulation, which seriously threatens the safe and stable operation of bushing. It is significant to study the polarization and depolarization behavior of oil-immersed cellulose polymer insulation with different moisture condition under higher voltage. Based on polarization/depolarization current method and charge difference method, the polarization/depolarization current, interfacial polarization current and electrical conductivity of cellulose polymer under different DC voltages and humidity were obtained. Based on molecular-dynamics simulation, the effect of moisture on cellulose polymer insulation was analyzed. The results show that the polarization and depolarization currents become larger with the increase in DC voltage and moisture. The higher applied voltage will accelerate the charge carrier motion. The ionization of water molecules will produce more charge carriers. Thus, high DC voltage and moisture content will increase the interface polarization current. Increased moisture content results in more charge carriers ionized by water molecules. In addition, the invasion of moisture will reduce the band width of cellulose polymer and enhance its electrostatic potential, so as to improve its overall electrical conductivity. This paper provides a reference for analyzing the polarization characteristics of charge carriers in cellulose polymer insulation. |
| first_indexed | 2024-03-10T00:39:47Z |
| format | Article |
| id | doaj.art-eebb87cde8f749eaaad95eb41df5d864 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-10T00:39:47Z |
| publishDate | 2022-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-eebb87cde8f749eaaad95eb41df5d8642023-11-23T15:09:49ZengMDPI AGPolymers2073-43602022-01-0114233610.3390/polym14020336Charge Carriers Relaxation Behavior of Cellulose Polymer Insulation Used in Oil Immersed BushingYu Shang0Qiang Liu1Chen Mao2Sen Wang3Fan Wang4Zheng Jian5Shilin Shi6Jian Hao7Shaanxi Electric Power Research Institute, State Grid Shaanxi Electric Power CO., Xi’an 710100, ChinaShaanxi Electric Power Research Institute, State Grid Shaanxi Electric Power CO., Xi’an 710100, ChinaShaanxi Electric Power Research Institute, State Grid Shaanxi Electric Power CO., Xi’an 710100, ChinaShaanxi Electric Power Research Institute, State Grid Shaanxi Electric Power CO., Xi’an 710100, ChinaShaanxi Electric Power Research Institute, State Grid Shaanxi Electric Power CO., Xi’an 710100, ChinaState Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, ChinaState Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, ChinaState Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, ChinaCellulose insulation polymer material is widely used in oil immersed bushing. Moisture is one of the important reasons for the deterioration of cellulose polymer insulation, which seriously threatens the safe and stable operation of bushing. It is significant to study the polarization and depolarization behavior of oil-immersed cellulose polymer insulation with different moisture condition under higher voltage. Based on polarization/depolarization current method and charge difference method, the polarization/depolarization current, interfacial polarization current and electrical conductivity of cellulose polymer under different DC voltages and humidity were obtained. Based on molecular-dynamics simulation, the effect of moisture on cellulose polymer insulation was analyzed. The results show that the polarization and depolarization currents become larger with the increase in DC voltage and moisture. The higher applied voltage will accelerate the charge carrier motion. The ionization of water molecules will produce more charge carriers. Thus, high DC voltage and moisture content will increase the interface polarization current. Increased moisture content results in more charge carriers ionized by water molecules. In addition, the invasion of moisture will reduce the band width of cellulose polymer and enhance its electrostatic potential, so as to improve its overall electrical conductivity. This paper provides a reference for analyzing the polarization characteristics of charge carriers in cellulose polymer insulation.https://www.mdpi.com/2073-4360/14/2/336cellulose polymer insulationpolarization/depolarization currentcharge carriermoisturemolecular dynamics simulation |
| spellingShingle | Yu Shang Qiang Liu Chen Mao Sen Wang Fan Wang Zheng Jian Shilin Shi Jian Hao Charge Carriers Relaxation Behavior of Cellulose Polymer Insulation Used in Oil Immersed Bushing Polymers cellulose polymer insulation polarization/depolarization current charge carrier moisture molecular dynamics simulation |
| title | Charge Carriers Relaxation Behavior of Cellulose Polymer Insulation Used in Oil Immersed Bushing |
| title_full | Charge Carriers Relaxation Behavior of Cellulose Polymer Insulation Used in Oil Immersed Bushing |
| title_fullStr | Charge Carriers Relaxation Behavior of Cellulose Polymer Insulation Used in Oil Immersed Bushing |
| title_full_unstemmed | Charge Carriers Relaxation Behavior of Cellulose Polymer Insulation Used in Oil Immersed Bushing |
| title_short | Charge Carriers Relaxation Behavior of Cellulose Polymer Insulation Used in Oil Immersed Bushing |
| title_sort | charge carriers relaxation behavior of cellulose polymer insulation used in oil immersed bushing |
| topic | cellulose polymer insulation polarization/depolarization current charge carrier moisture molecular dynamics simulation |
| url | https://www.mdpi.com/2073-4360/14/2/336 |
| work_keys_str_mv | AT yushang chargecarriersrelaxationbehaviorofcellulosepolymerinsulationusedinoilimmersedbushing AT qiangliu chargecarriersrelaxationbehaviorofcellulosepolymerinsulationusedinoilimmersedbushing AT chenmao chargecarriersrelaxationbehaviorofcellulosepolymerinsulationusedinoilimmersedbushing AT senwang chargecarriersrelaxationbehaviorofcellulosepolymerinsulationusedinoilimmersedbushing AT fanwang chargecarriersrelaxationbehaviorofcellulosepolymerinsulationusedinoilimmersedbushing AT zhengjian chargecarriersrelaxationbehaviorofcellulosepolymerinsulationusedinoilimmersedbushing AT shilinshi chargecarriersrelaxationbehaviorofcellulosepolymerinsulationusedinoilimmersedbushing AT jianhao chargecarriersrelaxationbehaviorofcellulosepolymerinsulationusedinoilimmersedbushing |