Electrical Circuit Flashover Model of Polluted Insulators under AC Voltage Based on the Arc Root Voltage Gradient Criterion

被引：17

作者：

Yang, Qing ^{[1
]}

Wang, Rui ^{[1
]}

Sima, Wenxia ^{[1
]}

Jiang, Chilong ^{[1
]}

Lan, Xing ^{[1
]}

Zahn, Markus ^{[2
]}

机构：

[1] Chongqing Univ, State Key Lab Power Transmiss Equipment & Syst Se, Chongqing 400030, Peoples R China

[2] MIT, Dept Elect Engn & Comp Sci, Elect Res Lab, Lab Electromagnet & Elect Syst,High Voltage Res L, Cambridge, MA 02139 USA

来源：

ENERGIES | 2012年 / 5卷 / 03期

关键词：

arc root voltage gradient; flashover mechanism; circuit model of insulator; AC arc; DYNAMIC-MODEL; PROPAGATION; ELECTROLYTE; SURFACES;

D O I：

10.3390/en5030752

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

080707 [能源环境工程]; 082001 [油气井工程];

摘要：

In order to study the flashover mechanism of polluted insulators under AC voltage, a new arc propagation criterion which is based on an arc root voltage gradient is proposed. This criterion can explain the variation of the arc root voltage gradient in the arc propagation process. Based on this criterion, a new distributed parameter electrical circuit flashover model of polluted insulators is presented. The arc channel is considered as an equivalent distributed parameter circuit model instead of using the arc voltage-gradient equation. The parameters of the arc model are obtained from the electromagnetic field distribution of the arc and the gas discharge theories. The arc root is considered as parallel paths including the polluted layer. The variation of the voltage on the arc root is related to the capability of arc propagation. This model takes the microscopic mechanism of arc root ionization into consideration, which can improve the accuracy of the flashover model. The results obtained from the presented model are in good agreement with other mathematical and experimental results.

引用

页码：752 / 769

页数：18

共 27 条

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Alston L.L., 1963, IEE P-GENER TRANSM D, V110, P1206

[2]

ELECTRONIC AND GASEOUS PROCESSES IN THE PREBREAKDOWN PHENOMENA OF DIELECTRIC LIQUIDS [J].