SF_(6)气体泻流模型及其检漏应用  

The SF_(6) Gas Effusion Model and its Application in Gas Leakage Detection

作　　者：刘荣海 何运华 郭新良 宋玉锋 郑欣 许宏伟 杨迎春 Liu Ronghai;He Yunhua;Guo Xinliang;Song Yufeng;Zheng Xin;Xu Hongwei;Yang Yingchun(Electric science research institute,Yunnan Power Grid,Kunming,China,650217)

机构地区：[1]云南电网有限责任公司电力科学研究院,昆明650217

出　　处：《云南电力技术》2021年第3期69-71,共3页Yunnan Electric Power

摘　　要：为提高充SF_(6)气体电力设备红外检漏的检出率,本文借鉴热力学泻流理论提出了SF_(6)气体泄漏模型,计算得到了-20-40℃环境温度下SF_(6)气体泄漏的平均辐射波长为7.8至9.7μm,为选择最佳敏感波段的红外成像仪提供了依据。模型计算还证明:利用红外成像进行检漏时,降低背景温度,有利于避开SF_(6)气体的辐射波段,提高红外图像的对比度,提升泄漏检出率。据此,研制了可调温度的背景增强装置,并在多个现场进行了对比应用,显著提升了红外图像对比度和泄漏缺陷检出率。In order to improve the Sulfur hexafluoride(SF_(6))gas leakage detection rate by infra-red image,the SF_(6) gas leakage model was proposed using thermodynamic effusion theory.Model calculation shows that the average radiation wavelengths of leaking SF_(6) are between 7.8 and 9.7 micrometers under the temperature of-20-40℃,which provides the basis for choosing the optimal infra-red camera.It also shows that reducing background temperature is helpful to keep away from the radiation wavelength of SF_(6) gas so that the contrast ratio of infra-red image can be enhanced to improve the leakage detection rate.Based on this,the background enhanced apparatus with temperature adjustment function was developed and applied in SF_(6) gas leakage detection of several substations.The application proved a obvious promotion in contrast ratio of infra-red image and leakage detection rate.

关 键 词：SF_(6)气体泄流 检出率 红外成像仪 积液模型 

分 类 号：TM74[电气工程—电力系统及自动化]