Arcing Model of a Disconnector and its Effect on VFTO  

作　　者：林莘 王娜 徐建源 

机构地区：[1]School of Electrical Engineering, Shenyang University of Technology [2]School of Information Engineering, Shenyang University of Chemical Technology

出　　处：《Plasma Science and Technology》2013年第7期644-647,共4页等离子体科学和技术（英文版）

基　　金：supported by Special Research Fund for Doctoral Program of Education Ministry of China (No. 20092102110001);Natural Science Foundation of Liaoning Province of China (No. 201102169);National Natural Science Foundation of China (No. 51277123)

摘　　要：In the computational process of very fast transient over-voltage （VFTO）, it is essen-tial to find an accurate model for a gas insulated substation. The arcing model of the disconnector is particularly important. The general arcing model is not able to give a good description of the arc development process. In this paper, based on the physical process of arcing and existing arc models （the exponential time-varying resistance model and the segmental arcing models）, a dy- namic arcing model is proposed, which is divided into two stages before and after the zero crossing. The dynamic arcing model combines hyperbola time-varying resistance and the Mayr model to describe the dynamic process of arcing. The present paper creates an arc model blockset upon the Matlab/Simulink software platform. Moreover for a specific 1100 kV station, VFTO is simulated in detail based on different arcing models. It is demonstrated that the dynamic arcing model can describe the physical arc process precisely and is useful for improving the accuracy of VFTO simulations.In the computational process of very fast transient over-voltage （VFTO）, it is essen-tial to find an accurate model for a gas insulated substation. The arcing model of the disconnector is particularly important. The general arcing model is not able to give a good description of the arc development process. In this paper, based on the physical process of arcing and existing arc models （the exponential time-varying resistance model and the segmental arcing models）, a dy- namic arcing model is proposed, which is divided into two stages before and after the zero crossing. The dynamic arcing model combines hyperbola time-varying resistance and the Mayr model to describe the dynamic process of arcing. The present paper creates an arc model blockset upon the Matlab/Simulink software platform. Moreover for a specific 1100 kV station, VFTO is simulated in detail based on different arcing models. It is demonstrated that the dynamic arcing model can describe the physical arc process precisely and is useful for improving the accuracy of VFTO simulations.

关 键 词：disconnector switching UHV dynamic arcing model gas insulated substa-tion VFTO 

分 类 号：TM564.1[电气工程—电器]