Characteristics of SF_6 Switch with a Small Gap under High Pressure and Nanosecond Pulse  

作　　者：汤俊萍 邱爱慈 薄海旺 董勤晓 何小平 

机构地区：[1]State Key Laboratory of Electrical Insulation and Power Equipment,School of Electrical Engineering,Xi'an Jiaotong University [2]Northwest Institute of Nuclear Technique

出　　处：《Plasma Science and Technology》2009年第2期216-219,共4页等离子体科学和技术（英文版）

基　　金：supported by National Natural Science Foundation of China (No. 50437030)

摘　　要：Structural design and tests on the characteristics of the SF6 gas switch with a small gap are presented. This kind of switch often works under high pressure and nanosecond pulse for getting pulse with faster risetime. The breakdown voltage and breakdown delay of a number of switches with different geometries, gas pressures and pulse waveforms were investigated. Experimental results suggested that the breakdown voltage increases linearly with the gas pressure, and the breakdown delay decreases with an increase in the gas pressure and a reduction in the gap distance of the switch under the same applied pulse. By using this kind of switch with a gap of 3 mm as a peaking switch, a pulse generator can provide an output voltage with a peak voltage of 300 kV and a risetime of 3 ns on a resistance load of 150Ω.Structural design and tests on the characteristics of the SF6 gas switch with a small gap are presented. This kind of switch often works under high pressure and nanosecond pulse for getting pulse with faster risetime. The breakdown voltage and breakdown delay of a number of switches with different geometries, gas pressures and pulse waveforms were investigated. Experimental results suggested that the breakdown voltage increases linearly with the gas pressure, and the breakdown delay decreases with an increase in the gas pressure and a reduction in the gap distance of the switch under the same applied pulse. By using this kind of switch with a gap of 3 mm as a peaking switch, a pulse generator can provide an output voltage with a peak voltage of 300 kV and a risetime of 3 ns on a resistance load of 150Ω.

关 键 词：SF6 gas switch high pressure small gap PULSE fast ristime 

分 类 号：TM564[电气工程—电器]