The Voltage Distribution Characteristics of a Hybrid Circuit Breaker During High Current Interruption

被引:8
|
作者
Cheng Xian [1 ,2 ]
Duan Xiongying [1 ]
Liao Minfu [1 ]
Huang Zhihui [1 ]
Luo Yan [1 ]
Zou Jiyan [1 ]
机构
[1] Dalian Univ Technol, Sch Elect Engn, Dalian 116023, Peoples R China
[2] Henan Univ Urban Construct, Dept Elect Engn, Pingdingshan 467036, Peoples R China
基金
中国国家自然科学基金;
关键词
hybrid circuit breaker; vacuum arc; SF6; arc; transient recovery voltage; dielectric recovery; breaking capacity; SIMULATION; ARC;
D O I
10.1088/1009-0630/15/8/16
中图分类号
O35 [流体力学]; O53 [等离子体物理学];
学科分类号
070204 ; 080103 ; 080704 ;
摘要
Hybrid circuit breaker (HCB) technology based on a vacuum interrupter and a SF6 interrupter in series has become a new research direction because of the low-carbon requirements for high voltage switches. The vacuum interrupter has an excellent ability to deal with the steep rising part of the transient recovery voltage (TRV), while the SF6 interrupter can withstand the peak part of the voltage easily. An HCB can take advantage of the interrupters in the current interruption process. In this study, an HCB model based on the vacuum ion diffusion equations, ion density equation, and modified Cassie-Mayr arc equation is explored. A simulation platform is constructed by using a set of software called the alternative transient program (ATP). An HCB prototype is also designed, and the short circuit current is interrupted by the HCB under different action sequences of contacts. The voltage distribution of the HCB is analyzed through simulations and tests. The results demonstrate that if the vacuum interrupter withstands the initial TRV and interrupts the post-arc current first, then the recovery speed of the dielectric strength of the SF6 interrupter will be fast. The voltage distribution between two interrupters is determined by their post-arc resistance, which happens after current-zero, and subsequently, it is determined by the capacitive impedance after the post-arc current decays to zero.
引用
收藏
页码:800 / 806
页数:7
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