Interruption Characteristics of High-voltage Hybrid Circuit Breaker Based on the Alternative of SF6 Gas

被引：0

作者：

Cheng X. ^{[1
]}

Chen Z. ^{[1
]}

Ge G. ^{[1
]}

Jiao L. ^{[1
]}

Liao M. ^{[2
]}

机构：

[1] School of Electrical Engineering, Zhengzhou University, Zhengzhou

[2] School of Electrical Engineering, Dalian University of Technology, Dalian

来源：

Gaodianya Jishu | / 12卷 / 3862-3868期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

CO[!sub]2[!/sub] gas gap; Dielectric strength recovery speed; Interruption performance; SF[!sub]6[!/sub] gas gap; Vacuum gap;

D O I：

10.13336/j.1003-6520.hve.20171127006

中图分类号：

学科分类号：

摘要：

To investigate the interruption characteristics of a high-voltage hybrid circuit breaker based on the substitute for SF6 gas, we prepared a test prototype of the hybrid circuit breaker composed of gas gap and vacuum gap, while the gas gap was filled with SF6 gas and CO2 gas, respectively. Based on the synthetic test circuit, the interruption performances of two types of hybrid circuit breakers were tested and compared. Moreover, the influences of different gas interruption dielectrics on the interruption performance of hybrid circuit breaker were analyzed. The influential factors on the interruption capacity of CO2 gas gap were discussed. As the test results convey, under favorable operating strategies, vacuum gap can provide about 100 μs for the dielectric strength recovery in gas gap. But limited by the slow dielectric strength recovery speed of CO2 gas in rotating arc gas interrupter, CO2 gas gap cannot cooperate with vacuum gap to achieve satisfied interruption performances compared to SF6 gas gap. The improvements in the interruption performance of CO2 gas gap are limited while increasing the gas pressure from 0.8 MPa to 0.6 MPa, as the breakdown voltage of 0.8 MPa CO2 gas gap is only 8 kV after 500 μs since current zero. It is suggested that the structure of gas interrupter should be optimized after combining with the properties of CO2 gas so as to enhance its interruption capacity and provide a basis for the development of hybrid circuit breaker based on CO2 gas. © 2017, High Voltage Engineering Editorial Department of CEPRI. All right reserved.

引用

页码：3862 / 3868

页数：6

共 20 条

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