Multichannel Discharge Characteristics of Gas Switch Gap in SF_6-N_2 or SF_6-Ar Gas Mixtures Under Nanosecond Triggering Pulses

Experiments were carried out to ascertain multichannel discharge characteristics in a self-designed coaxial field-distortion gas switch filled with SFa-N2 or SF6-Ar gas mixtures of different mixing ratios. In these experiments, the pressure varied from 0.1 MPa to 0.2 MPa, the voltage pulse peak applied to the switch was in the range from 40 kV to 78 kV, and the pulse rise time was 11 ns. The static breakdown strength of the gas switch gap in the switch was also measured. The results show that in general the average number of discharge channels for SF6-Ar or SF6-N2 gas mixture which contains less SFa is larger than that for gas mixture which contains more SF6, however, the average number of channels almost keeps constant as the gas mixing ratio varies when the pulse rise rate is high enough. The static breakdown strength of the gas switch gap decreases slightly as the content of argon or nitrogen increases.

基于多功能数字显示仪表的环境监测功能设计

由于传统的多功能数字显示仪表主要针对电力中供配电系统、工矿企业、公共设施、智能大夏等电力监控需求设计的,其主要功能为监测电力参数。针对环境监测的问题,数字显示仪表对这块功能研究却不多。鉴于此,文中从数字显示仪表的多功能设计出发,依据电力系统中配电房、开关柜实际需要配套环境监测设备,在HT6025开发的数字显示仪表的基础上,设计一套具备环境监测功能的多功能数字显示仪表,设计的环境监测功能能够采集温湿度、水浸报警、烟雾报警、SF6&O2气体检测等功能,并实现故障预警等功能。