Investigations on the effect of ageing on charge de-trapping processes of epoxy–alumina nanocomposites based on isothermal relaxation current measurements
In this study, the relationship between thermal ageing and charge trapping properties of epoxy-based nanocomposites has been investigated. With ageing, any dielectric material undergoes thorough degradation. This degradation significantly affects the space charge accumulation and charge trapping beh...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2020-10-01
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| Series: | IET Nanodielectrics |
| Subjects: | |
| Online Access: | https://digital-library.theiet.org/content/journals/10.1049/iet-nde.2020.0020 |
| _version_ | 1818727060573519872 |
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| author | Subhajit Maur Nasirul Haque Nasirul Haque Preetha Pottekat Biswajit Chakraborty Sovan Dalai Sovan Dalai Biswendu Chatterjee |
| author_facet | Subhajit Maur Nasirul Haque Nasirul Haque Preetha Pottekat Biswajit Chakraborty Sovan Dalai Sovan Dalai Biswendu Chatterjee |
| author_sort | Subhajit Maur |
| collection | DOAJ |
| description | In this study, the relationship between thermal ageing and charge trapping properties of epoxy-based nanocomposites has been investigated. With ageing, any dielectric material undergoes thorough degradation. This degradation significantly affects the space charge accumulation and charge trapping behaviour of the dielectric, which are very important parameters for insulation health under high-voltage direct current (HVDC) environment. In this work, an improved model based on the isothermal relaxation current (IRC) has been developed to study the charge trapping behaviour of pure epoxy and epoxy alumina (Al(2)O(3)) nano-composites at different ageing conditions. A methodology based on polarisation–depolarisation current (PDC) measurements has been proposed to identify the current component due to a dipolar relaxation in measured total IRC. This will help to identify the trap distribution characteristics more accurately compared to conventional IRC measurements. It was experimentally observed that the addition of nanoparticles significantly reduces trapped charge formation and reduces thermal degradation. It is observed that aging leads to the generation of deeper traps, while the addition of Al(2)O(3) nanoparticles mainly enhances the density of shallow traps. Results presented in this work indicate that epoxy–alumina nanocomposites are very much suitable in HVDC applications from the perspective of trapped charge accumulation. |
| first_indexed | 2024-12-17T22:08:06Z |
| format | Article |
| id | doaj.art-9c5d1f3775cb47489e06fc9036c7cb24 |
| institution | Directory Open Access Journal |
| issn | 2514-3255 |
| language | English |
| last_indexed | 2024-12-17T22:08:06Z |
| publishDate | 2020-10-01 |
| publisher | Wiley |
| record_format | Article |
| series | IET Nanodielectrics |
| spelling | doaj.art-9c5d1f3775cb47489e06fc9036c7cb242022-12-21T21:30:48ZengWileyIET Nanodielectrics2514-32552020-10-0110.1049/iet-nde.2020.0020IET-NDE.2020.0020Investigations on the effect of ageing on charge de-trapping processes of epoxy–alumina nanocomposites based on isothermal relaxation current measurementsSubhajit Maur0Nasirul HaqueNasirul HaquePreetha PottekatBiswajit Chakraborty1Sovan Dalai2Sovan Dalai3Biswendu Chatterjee4Jadavpur UniversityJadavpur UniversityJadavpur UniversityJadavpur UniversityJadavpur UniversityIn this study, the relationship between thermal ageing and charge trapping properties of epoxy-based nanocomposites has been investigated. With ageing, any dielectric material undergoes thorough degradation. This degradation significantly affects the space charge accumulation and charge trapping behaviour of the dielectric, which are very important parameters for insulation health under high-voltage direct current (HVDC) environment. In this work, an improved model based on the isothermal relaxation current (IRC) has been developed to study the charge trapping behaviour of pure epoxy and epoxy alumina (Al(2)O(3)) nano-composites at different ageing conditions. A methodology based on polarisation–depolarisation current (PDC) measurements has been proposed to identify the current component due to a dipolar relaxation in measured total IRC. This will help to identify the trap distribution characteristics more accurately compared to conventional IRC measurements. It was experimentally observed that the addition of nanoparticles significantly reduces trapped charge formation and reduces thermal degradation. It is observed that aging leads to the generation of deeper traps, while the addition of Al(2)O(3) nanoparticles mainly enhances the density of shallow traps. Results presented in this work indicate that epoxy–alumina nanocomposites are very much suitable in HVDC applications from the perspective of trapped charge accumulation.https://digital-library.theiet.org/content/journals/10.1049/iet-nde.2020.0020space chargeelectric current measurementaluminananocompositesnanoparticlesageingdielectric materialsepoxy insulationthermal degradationshallow trapsepoxy-alumina nanocompositestrapped charge accumulationisothermal relaxation current measurementsthermal ageingepoxy-based nanocompositesdielectric materialspace charge accumulationinsulation healthhigh-voltage direct current environmentageing conditionspolarisation-depolarisation current measurementsdipolar relaxationtrap distribution characteristicscharge formationirc measurementspdc measurementsnanoparticleshvdc environmental(2)o(3) |
| spellingShingle | Subhajit Maur Nasirul Haque Nasirul Haque Preetha Pottekat Biswajit Chakraborty Sovan Dalai Sovan Dalai Biswendu Chatterjee Investigations on the effect of ageing on charge de-trapping processes of epoxy–alumina nanocomposites based on isothermal relaxation current measurements IET Nanodielectrics space charge electric current measurement alumina nanocomposites nanoparticles ageing dielectric materials epoxy insulation thermal degradation shallow traps epoxy-alumina nanocomposites trapped charge accumulation isothermal relaxation current measurements thermal ageing epoxy-based nanocomposites dielectric material space charge accumulation insulation health high-voltage direct current environment ageing conditions polarisation-depolarisation current measurements dipolar relaxation trap distribution characteristics charge formation irc measurements pdc measurements nanoparticles hvdc environment al(2)o(3) |
| title | Investigations on the effect of ageing on charge de-trapping processes of epoxy–alumina nanocomposites based on isothermal relaxation current measurements |
| title_full | Investigations on the effect of ageing on charge de-trapping processes of epoxy–alumina nanocomposites based on isothermal relaxation current measurements |
| title_fullStr | Investigations on the effect of ageing on charge de-trapping processes of epoxy–alumina nanocomposites based on isothermal relaxation current measurements |
| title_full_unstemmed | Investigations on the effect of ageing on charge de-trapping processes of epoxy–alumina nanocomposites based on isothermal relaxation current measurements |
| title_short | Investigations on the effect of ageing on charge de-trapping processes of epoxy–alumina nanocomposites based on isothermal relaxation current measurements |
| title_sort | investigations on the effect of ageing on charge de trapping processes of epoxy alumina nanocomposites based on isothermal relaxation current measurements |
| topic | space charge electric current measurement alumina nanocomposites nanoparticles ageing dielectric materials epoxy insulation thermal degradation shallow traps epoxy-alumina nanocomposites trapped charge accumulation isothermal relaxation current measurements thermal ageing epoxy-based nanocomposites dielectric material space charge accumulation insulation health high-voltage direct current environment ageing conditions polarisation-depolarisation current measurements dipolar relaxation trap distribution characteristics charge formation irc measurements pdc measurements nanoparticles hvdc environment al(2)o(3) |
| url | https://digital-library.theiet.org/content/journals/10.1049/iet-nde.2020.0020 |
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