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High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes
SJR: 0.137 SNIP: 0.341 CiteScore™: 0.43

ISSN Print: 1093-3611
ISSN Online: 1940-4360

High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes

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

USING INTELLIGENT OPERATION OF A HIGH VOLTAGE CIRCUIT BREAKER TO IMPROVE ITS OPENING AND CLOSING CAPACITY

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

ABSTRACT

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.


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