基于红外光谱检测的SF_6/N_2混合电气设备泄漏特性试验研究

SF_6气体是强温室效应气体,为了减少SF_6气体用量,提升环保效益,SF_6/N_2混合电气设备逐步在电网进入应用。由于两种气体密度具有较大差异,向设备充入气体时,混合气体是否能迅速扩散均匀直接影响到设备的安全运行。搭建了快速试验平台,采用基于红外光谱的SF_6检测技术进行SF_6气体浓度监测,研究了不同比例、不同压强下混合气体的扩散效应,发现先充入N_2比先充入SF_6扩散均匀能减少大量时间;同一温度不同压强的设备发生缓慢泄漏缺陷时,可以用设备初始混合比例进行补气,从而保证混合电气设备的安全运行。

Experimental Study on Leakage Characteristics of SF_6/N_2 Hybrid Electrical Equipment Based on Infrared Spectroscopy

SF6 gas is a strong greenhouse effect gas.In order to reduce the amount of SF6 gas and improve environmental protection benefits,SF6/N2 hybrid electrical equipment is gradually entering the application in the grid.Since the density of the two gases is greatly different,whether the mixed gas can diffuse rapidly and uniformly,will affect the safe operation of the device when the device is filled with gas.In this paper,through one rapid test platform built,SF6 gas monitoring technology based on infrared spectroscopy was used to monitor the concentration of SF6 gas and the diffusion effect of mixed gas under different ratios and pressures is studied,finding that the first filling of N2 is more uniform than that of SF6,and the time is greatly reduced.When equipment with different pressures at the same temperature has a slow leakage defect,the initial mixing ratio of the equipment can be used to supplement the air,thus to ensure the safe operation of the hybrid electrical equipment.