Investigation on DC interruption based on artificial current zero of vacuum switch

Author

Shi, Z.Q. ; Jia, S.L. ; Ma, M. ; Song, X.C. ; Yang, H.Y. ; Liu, C. ; Wang, L.J.

Author_Institution

State Key Lab. of Electr. Insulation & Power Equip., Xi´´an Jiaotong Univ., Xi´´an, China

fYear

2010

fDate

Aug. 30 2010-Sept. 3 2010

Firstpage

158

Lastpage

161

Abstract

Direct current interruption utilizing vacuum switch based on artificial current zero is investigated. A high-speed vacuum switch, which is driven by electromagnetic repulsion force, is adopted as the main switch. The injection of high-frequency countercurrent is controlled by a triggered vacuum switch. The main experimental current is supplied by a LC circuit. The overvoltage generated during interruption is suppressed by metal oxide arrester. The interruption process is also simulated via a circuit model, with which the two important current commutation processes are analyzed, i.e., the current commutation from main switch to countercurrent branch, and the current commutation from countercurrent branch to arrester branch. Simulation results are compared with measured waveforms of voltage and current.

Keywords

arresters; electromagnetic forces; vacuum circuit breakers; DC interruption process; LC circuit; artificial current zero; current commutation; direct current interruption; electromagnetic repulsion force; high-frequency countercurrent injection; high-speed vacuum switch; metal oxide arrester; triggered vacuum switch; vacuum circuit breakers; Integrated circuit modeling; Logic gates; Mathematical model; Shock absorbers; Springs; Vacuum systems; Zinc oxide;

fLanguage

English

Publisher

ieee

Conference_Titel

Discharges and Electrical Insulation in Vacuum (ISDEIV), 2010 24th International Symposium on

Conference_Location

Braunschweig

ISSN

1093-2941

Print_ISBN

978-1-4244-8367-9

Electronic_ISBN

1093-2941

Type

conf

DOI

10.1109/DEIV.2010.5625875

Filename

5625875