家用电线绝缘过热气体衍生物检测与流场影响研究  

Study on detection and flow field effect of overheating gas derivatives in household wire insulation

作　　者：武肖 姚平 赵文彬 WU Xiao;YAO Ping;ZHAO Wenbin(College of Electrical Engineering,Shanghai University of Electric Power,Shanghai 200090,China;Jiangsu Shilin Electrical Equipment Co.,Ltd.,Zhenjiang 212200,China)

机构地区：[1]上海电力大学电气工程学院,上海200090 [2]江苏士林电气设备有限公司,江苏镇江212200

出　　处：《绝缘材料》2024年第2期112-120,共9页Insulating Materials

摘　　要：为利用气体衍生物关键参数快速检出电线绝缘材料过热缺陷,本文通过试验获得电线绝缘材料过热逸出气体衍生物浓度与绝缘材料温度关系曲线;建立热电耦合仿真模型模拟电线参数、电线敷设方式和环境温度对电线绝缘温度的影响;建立热流耦合仿真模型模拟过热缺陷位置、穿线管水平长度和气体类别对逸出气体衍生物流体场中传感器响应时间的影响,并通过正交试验确定影响程度的权重。结果表明:绝缘材料PVC过热缺陷逸出气体主要为CH_(4)、C_(2)H_(2)、CO;电线参数的选型对绝缘材料温度影响最大;检测气体种类对传感器响应时间的影响最大。In order to quickly detect the overheating defects of wire insulation materials by using the key parameters of gas derivatives,the relationship curves between the concentration of gas derivatives and the temperature wire insulation materials were obtained through experiments.A thermoelectric coupling simulation model was established to simulate the effects of wire parameters,wire laying mode and ambient temperature on wire insulation temperature.A heat-flow coupling simulation model was established to simulate the effects of overheating defect location,threading tube horizontal length,and gas class on the sensor response time of escaped gas derivatives in the fluid field.The weight of influence degree was determined by orthogonal test.The results show that CH_(4),C_(2)H_(2),and CO are the main gases escaping from overheating defects of PVC insulation material.The selection of wire parameters has the greatest influence on insulation material temperature.The type of detected gas has the greatest influence on the response time of sensors.

关 键 词：绝缘材料 气体衍生物 过热缺陷 流体场 

分 类 号：TM215.1[一般工业技术—材料科学与工程]