Modeling of Dry Band Formation and Arcing Processes on the Polluted Composite Insulator Surface
This paper modeled the dry band formation and arcing processes on the composite insulator surface to investigate the mechanism of dry band arcing and optimize the insulator geometry. The model calculates the instantaneous electric and thermal fields before and after arc initialization by a generaliz...
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Online Access: | https://www.mdpi.com/1996-1073/12/20/3905 |
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doaj-cb426c825aa24da29ee9c694b25958fb2020-11-25T01:18:40ZengMDPI AGEnergies1996-10732019-10-011220390510.3390/en12203905en12203905Modeling of Dry Band Formation and Arcing Processes on the Polluted Composite Insulator SurfaceJiahong He0Kang He1Bingtuan Gao2School of Electrical Engineering, Southeast University, Nanjing 210096, ChinaSchool of Electrical Engineering, Southeast University, Nanjing 210096, ChinaSchool of Electrical Engineering, Southeast University, Nanjing 210096, ChinaThis paper modeled the dry band formation and arcing processes on the composite insulator surface to investigate the mechanism of dry band arcing and optimize the insulator geometry. The model calculates the instantaneous electric and thermal fields before and after arc initialization by a generalized finite difference time domain (GFDTD) method. This method improves the field calculation accuracy at a high precision requirement area and reduces the computational complexity at a low precision requirement area. Heat transfer on the insulator surface is evaluated by a thermal energy balance equation to simulate a dry band formation process. Flashover experiments were conducted under contaminated conditions to verify the theoretical model. Both simulation and experiments results show that dry bands were initially formed close to high voltage (HV) and ground electrodes because the electric field and leakage current density around electrode are higher when compared to other locations along the insulator creepage distance. Three geometry factors (creepage factor, shed angle, and alternative shed ratio) were optimized when the insulator creepage distances remained the same. Fifty percent flashover voltage and average duration time from dry band generation moment to flashover were calculated to evaluate the insulator performance under contaminated conditions. This model analyzes the dry band arcing process on the insulator surface and provides detailed information for engineers in composite insulator design.https://www.mdpi.com/1996-1073/12/20/3905composite insulatordry band formationheat transfer modelgeneralized finite difference time domain |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Jiahong He Kang He Bingtuan Gao |
spellingShingle |
Jiahong He Kang He Bingtuan Gao Modeling of Dry Band Formation and Arcing Processes on the Polluted Composite Insulator Surface Energies composite insulator dry band formation heat transfer model generalized finite difference time domain |
author_facet |
Jiahong He Kang He Bingtuan Gao |
author_sort |
Jiahong He |
title |
Modeling of Dry Band Formation and Arcing Processes on the Polluted Composite Insulator Surface |
title_short |
Modeling of Dry Band Formation and Arcing Processes on the Polluted Composite Insulator Surface |
title_full |
Modeling of Dry Band Formation and Arcing Processes on the Polluted Composite Insulator Surface |
title_fullStr |
Modeling of Dry Band Formation and Arcing Processes on the Polluted Composite Insulator Surface |
title_full_unstemmed |
Modeling of Dry Band Formation and Arcing Processes on the Polluted Composite Insulator Surface |
title_sort |
modeling of dry band formation and arcing processes on the polluted composite insulator surface |
publisher |
MDPI AG |
series |
Energies |
issn |
1996-1073 |
publishDate |
2019-10-01 |
description |
This paper modeled the dry band formation and arcing processes on the composite insulator surface to investigate the mechanism of dry band arcing and optimize the insulator geometry. The model calculates the instantaneous electric and thermal fields before and after arc initialization by a generalized finite difference time domain (GFDTD) method. This method improves the field calculation accuracy at a high precision requirement area and reduces the computational complexity at a low precision requirement area. Heat transfer on the insulator surface is evaluated by a thermal energy balance equation to simulate a dry band formation process. Flashover experiments were conducted under contaminated conditions to verify the theoretical model. Both simulation and experiments results show that dry bands were initially formed close to high voltage (HV) and ground electrodes because the electric field and leakage current density around electrode are higher when compared to other locations along the insulator creepage distance. Three geometry factors (creepage factor, shed angle, and alternative shed ratio) were optimized when the insulator creepage distances remained the same. Fifty percent flashover voltage and average duration time from dry band generation moment to flashover were calculated to evaluate the insulator performance under contaminated conditions. This model analyzes the dry band arcing process on the insulator surface and provides detailed information for engineers in composite insulator design. |
topic |
composite insulator dry band formation heat transfer model generalized finite difference time domain |
url |
https://www.mdpi.com/1996-1073/12/20/3905 |
work_keys_str_mv |
AT jiahonghe modelingofdrybandformationandarcingprocessesonthepollutedcompositeinsulatorsurface AT kanghe modelingofdrybandformationandarcingprocessesonthepollutedcompositeinsulatorsurface AT bingtuangao modelingofdrybandformationandarcingprocessesonthepollutedcompositeinsulatorsurface |
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