不同缺陷条件下高压XLPE电缆的逸出气体特性  

Evolved Gas Characteristics of High-voltage XLPE Cables Under Different Fault Conditions

作　　者：袁豪 周凯[1] 孔佳民 李原 李泽瑞 刘成禹 YUAN Hao;ZHOU Kai;KONG Jiamin;LI Yuan;LI Zerui;LIU Chengyu(College of Electrical Engineering,Sichuan University,Chengdu 610065,China;Shaoxing Power Supply Company,State Grid Zhejiang Electric Power Company,Shaoxing 312000,China)

机构地区：[1]四川大学电气工程学院,成都610065 [2]国网浙江省电力公司绍兴供电公司,绍兴312000

出　　处：《高电压技术》2025年第2期946-955,共10页High Voltage Engineering

基　　金：国家自然科学基金(52277156)。

摘　　要：基于电缆内部材料逸出气体分析的方法目前在电缆状态诊断研究领域广受关注。而明确高压XLPE电缆在不同缺陷条件下的逸出气体特性是开展状态诊断工作的基本前提。鉴于此,首先考虑了高压XLPE电缆的几种典型故障类型,包括阻水缓冲层腐蚀、XLPE绝缘的低能放电与高能放电故障,以及缓冲层、XLPE绝缘及半导电层材料的低温与高温热故障,通过实验分别模拟了上述故障类型的特征气体生成过程。以CH_(4)、C_(2)H_(6)、C_(2)H_(4)、C_(2)H_(2)、CO、CO_(2)和H_(2)为特征气体产物,阐述了各类故障生成的特征气体种类及含量比值的差异性。结果表明,部分故障类型仅可通过气体产物种类进行甄别,而其他故障类型还需进一步结合气体含量比值等特征参数才能进一步分辨。该研究工作有望为高压XLPE电缆的状态诊断提供一种新思路,为利用XLPE电缆产气特性评估电缆状态提供数据及理论依据。The method of analyzing the gases evolved from the internal materials of cables is currently receiving signifi-cant attention in the field of cable condition diagnosis research.Clarifying the characteristics of gases released from high-voltage XLPE cables under different defect conditions is a fundamental prerequisite for conducting condition diag-nosis work.In response to this,several typical fault types of high-voltage XLPE cables,including corrosion of the water-blocking buffer layer,low-energy and high-energy discharge faults in XLPE insulation,as well as low-temperature and high-temperature thermal faults in the buffer layer,XLPE,and semiconductive layer materials,were taken into con-siderattion,and experimental simulations were conducted to replicate the characteristic gas generation processes of these fault types.Moreover,the variations in the types and proportions of characteristic gases produced by different faults,in-cluding CH_(4),C_(2)H_(6),C_(2)H_(4),C_(2)H_(2),CO,CO_(2),and H_(2) were described.Findings suggest that certain fault types can be identified solely by the types of gas produced,while distinguishing other fault types necessitates additional consideration of parameters like gas proportions.This study is expected to provide a new perspective for the state diagnosis of high-voltage XLPE cables,offering data and theoretical supports for assessing cable conditions based on XLPE cable gas production characteristics.

关 键 词：高压XLPE电缆 逸出气体分析 放电故障 热故障 状态诊断 

分 类 号：TM75[电气工程—电力系统及自动化]