Model for Predicting DC Flashover Voltage of Pre-Contaminated and Ice-Covered Long Insulator Strings under Low Air Pressure
In the current study, a multi-arc predicting model for DC critical flashover voltage of iced and pre-contaminated long insulator strings under low atmospheric pressure is developed. The model is composed of a series of different polarity surface arcs, icicle-icicle air gap arcs, and residual layer r...
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Online Access: | http://www.mdpi.com/1996-1073/4/4/628/ |
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doaj-80d9d931f3c74b5abcbd309e3a3c29e92020-11-24T23:30:15ZengMDPI AGEnergies1996-10732011-04-014462864310.3390/en4040628Model for Predicting DC Flashover Voltage of Pre-Contaminated and Ice-Covered Long Insulator Strings under Low Air PressureZhijin ZhangLichun ShuQing YangXingliang JiangCaixin SunJianlin HuIn the current study, a multi-arc predicting model for DC critical flashover voltage of iced and pre-contaminated long insulator strings under low atmospheric pressure is developed. The model is composed of a series of different polarity surface arcs, icicle-icicle air gap arcs, and residual layer resistance. The calculation method of the residual resistance of the ice layer under DC multi-arc condition is established. To validate the model, 7-unit and 15-unit insulator strings were tested in a multi-function artificial climate chamber under the coexistent conditions of low air pressure, pollution, and icing. The test results showed that the values calculated by the model satisfactorily agreed with those experimentally measured, with the errors within the range of 10%, validating the rationality of the model.http://www.mdpi.com/1996-1073/4/4/628/ice-covered insulator stringflashovermathematical modelDClow air pressurepre-contamination |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Zhijin Zhang Lichun Shu Qing Yang Xingliang Jiang Caixin Sun Jianlin Hu |
spellingShingle |
Zhijin Zhang Lichun Shu Qing Yang Xingliang Jiang Caixin Sun Jianlin Hu Model for Predicting DC Flashover Voltage of Pre-Contaminated and Ice-Covered Long Insulator Strings under Low Air Pressure Energies ice-covered insulator string flashover mathematical model DC low air pressure pre-contamination |
author_facet |
Zhijin Zhang Lichun Shu Qing Yang Xingliang Jiang Caixin Sun Jianlin Hu |
author_sort |
Zhijin Zhang |
title |
Model for Predicting DC Flashover Voltage of Pre-Contaminated and Ice-Covered Long Insulator Strings under Low Air Pressure |
title_short |
Model for Predicting DC Flashover Voltage of Pre-Contaminated and Ice-Covered Long Insulator Strings under Low Air Pressure |
title_full |
Model for Predicting DC Flashover Voltage of Pre-Contaminated and Ice-Covered Long Insulator Strings under Low Air Pressure |
title_fullStr |
Model for Predicting DC Flashover Voltage of Pre-Contaminated and Ice-Covered Long Insulator Strings under Low Air Pressure |
title_full_unstemmed |
Model for Predicting DC Flashover Voltage of Pre-Contaminated and Ice-Covered Long Insulator Strings under Low Air Pressure |
title_sort |
model for predicting dc flashover voltage of pre-contaminated and ice-covered long insulator strings under low air pressure |
publisher |
MDPI AG |
series |
Energies |
issn |
1996-1073 |
publishDate |
2011-04-01 |
description |
In the current study, a multi-arc predicting model for DC critical flashover voltage of iced and pre-contaminated long insulator strings under low atmospheric pressure is developed. The model is composed of a series of different polarity surface arcs, icicle-icicle air gap arcs, and residual layer resistance. The calculation method of the residual resistance of the ice layer under DC multi-arc condition is established. To validate the model, 7-unit and 15-unit insulator strings were tested in a multi-function artificial climate chamber under the coexistent conditions of low air pressure, pollution, and icing. The test results showed that the values calculated by the model satisfactorily agreed with those experimentally measured, with the errors within the range of 10%, validating the rationality of the model. |
topic |
ice-covered insulator string flashover mathematical model DC low air pressure pre-contamination |
url |
http://www.mdpi.com/1996-1073/4/4/628/ |
work_keys_str_mv |
AT zhijinzhang modelforpredictingdcflashovervoltageofprecontaminatedandicecoveredlonginsulatorstringsunderlowairpressure AT lichunshu modelforpredictingdcflashovervoltageofprecontaminatedandicecoveredlonginsulatorstringsunderlowairpressure AT qingyang modelforpredictingdcflashovervoltageofprecontaminatedandicecoveredlonginsulatorstringsunderlowairpressure AT xingliangjiang modelforpredictingdcflashovervoltageofprecontaminatedandicecoveredlonginsulatorstringsunderlowairpressure AT caixinsun modelforpredictingdcflashovervoltageofprecontaminatedandicecoveredlonginsulatorstringsunderlowairpressure AT jianlinhu modelforpredictingdcflashovervoltageofprecontaminatedandicecoveredlonginsulatorstringsunderlowairpressure |
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