High Temperature Material Processes (An International Quarterly of High-Technology Plasma Processes) An International Journal

ISSN for PRINT: 1093-3611

For Online Access

Best Paper Award Selection - Editorial Board Site

2007, Volume11

Issue 4

161 pages

DOI: 10.1615/HighTempMatProc.v11.i4

Issue price - $168.00

Xiaoning Chen
Universite de Paris XII Val-de-Marne,Laboratoire Images,Signaux et Systemes Intelligents,Creteil,France; and Xi'an Jiaotong University of China,Electrical Engineering School,Electrical Apparatus Division,Nanjing Engineering Institute,Nanjing,China

Patrick Siarry
Universite de Paris XII Val-de-Marne, Laboratoire Images, Signaux et Systemes Intelligents (LiSSi, EA 3956), 61 avenue du General de Gaulle, 94010 Creteil, France

Zhiying Ma
Xi'an Jiaotong University of China, Electrical Engineering School, Electrical Apparatus Division, Nanjing Jiangsu 210007, China

Yunsheng Zhang
Nanjing Engineering Institute, Nanjing Jiangsu 210007, China

The research for the characteristics and the applications of "Intelligent Operation of a Circuit Breaker" has become a new, interesting and attracted attention topic because "Intelligent Operation" can improve the opening and closing capacity of a high voltage circuit breaker and its reliability. In this paper, the mathematical models and calculating method of the dielectric recovery characteristic and moving characteristic of a circuit breaker are developed, based on the breakdown theory of critical electric strength. The sensitivity of the gap between open contacts to non-uniform coefficients of electric field is considered the dielectric recovery strength as calculated. The simulation results are in accordance with the experiment results. The influences of the characteristic of dielectric recovery on the circuit breaker in the opening and closing are analyzed. It is pointed out that "Intelligent Operation" of a circuit breaker can change the characteristic of dielectric recovery, and improve its opening and closing capacity consequently. The operating overvoltage appears when a circuit breaker, especially a high-voltage circuit breaker is opening or closing, which causes strong Electro Magnetic Interference (EMI) and might even damage power and electric equipments near the circuit breaker. In this paper the factors which create operating overvoltage are analyzed. The methods for reducing or avoiding operating overvoltage are put forward, which are realized by changing the moving characteristics of the circuit breaker, such as the initial phase confirmed in closing, the current phase selected and the diameter of the drain oil aperture of operating mechanism adjusted in opening, i.e. the intelligent operation used in the moving of circuit breaker.

DOI: 10.1615/HighTempMatProc.v11.i4.140 Download article, 619-640 pages

Article price - $35.00

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