基于FTIR的XLPE电缆缓冲层烧蚀缺陷特征气体检测技术及应用  

Characteristic Gases Detection Technology and Application of Buffer Layer Ablation Defects in XLPE Cables Based on FTIR

作　　者：李晓杉 汤晓君[1,2] 陈厚清 李建英[1] 高建 任志刚 LI Xiaoshan;TANG Xiaojun;CHEN Houqing;LI Jianying;GAO Jian;REN Zhigang(School of Electrical Engineering,Xi’an Jiaotong University,Xi’an 710049,China;School of Instrument Science and Technology,Xi’an Jiaotong University,Xi’an 710049,China;State Grid Beijing Electric Power Research Institute,Beijing 100075,China)

机构地区：[1]西安交通大学电气工程学院,西安710049 [2]西安交通大学仪器科学与技术学院,西安710049 [3]国网北京市电力公司电力科学研究院,北京100075

出　　处：《高电压技术》2025年第2期678-685,共8页High Voltage Engineering

基　　金：国家电网公司科技项目(5108-202218280A-2-353-XG)。

摘　　要：缓冲层烧蚀缺陷是导致高压交联聚乙烯(cross-linked polyethylene,XLPE)电缆故障的重要原因。然而,目前尚无在电缆运行现场对该缺陷的有效检测方法。为了提高XLPE电缆缓冲层烧蚀缺陷的检出率、检测速度、安全性和便携性,研究了CH4、C2H6、C2H4、C2H2、CO和H2特征气体与缓冲层烧蚀缺陷的关系,提出了一种基于傅里叶变换红外光谱的XLPE电缆缓冲层烧蚀缺陷特征气体检测技术,并研制了缓冲层烧蚀特征气体检测装置。分别通过环境监测、混合气体检测和模拟烧蚀气体检测验证该方法和装置的性能。最后,将该装置应用于220 kV的XLPE电缆故障现场,进一步验证该方法的可行性。结果表明,温度、湿度、压力测量结果准确,误差均小于10%;特征气体的体积分数检测误差均小于7%,检测周期小于1 min;特征气体的体积分数均与烧蚀时间正相关,能够表征缓冲层的烧蚀缺陷。同时,现场应用结果进一步表明,该方法能够有效用于现场缓冲层烧蚀缺陷的特征气体检测,为缓冲层烧蚀缺陷的快速诊断提供有力支撑。Buffer layer ablation defect is an important cause of high voltage cross-linked polyethylene(XLPE)cable failure.However,there is no effective detection method for this defect at the cable operation site.To improve the detec-tion rate,detection speed,safety,and portability of the buffer layer ablation defect in XLPE cable,the relationship between characteristic gases(CH4,C2H6,C2H4,C2H2,CO,and H2)and the buffer layer ablation defect was studied,and detection technology for the characteristic gases of the buffer layer ablation defect in XLPE cable based on the Fourier transform infrared spectroscopy was proposed.A buffer layer ablation characteristic gas analyzer was developed.The performance of the method and device was verified by environmental monitor,mixed gas detection,and simulated abla-tive gas detection,respectively.Finally,the device was applied to the 220 kV XLPE cable fault site to verify the method's feasibility further.The results show that the temperature,humidity,and pressure measurements are accurate,with an error of less than 10%;the detection errors of the characteristic gas concentrations are less than 7%,and the detection period is less than 1 minute;the volume fractions of the characteristic gases are all positively correlated with the ablation time,which can characterize the ablation defect of the buffer layer.At the same time,the field application results further show that the method can be effectively used for detection of characteristic gases of on-site buffer layer ablation defects,which provides strong supports for the rapid diagnosis of buffer layer ablation defects.

关 键 词：缓冲层 烧蚀缺陷 XLPE电缆 特征气体 傅里叶变换红外光谱 

分 类 号：TM24[一般工业技术—材料科学与工程]