开关柜内部PVC电缆绝缘材料过热产气的传感器检测方法研究

Sensor Detection Method for Overheating and Gas Production of PVC Cable Insulation Material Inside Switchgear

作为电力系统中的重要设备,开关设备电缆故障可能导致局部停电,传统的温度测量方法存在接触试验、成本高、盲区等缺点。为了克服这些限制,提出了一种基于半导体气体传感器检测开关柜中电缆过热的方法。首先,研究电缆外层绝缘常用的聚氯乙烯(polyvinyl chloride,PVC)材料的过热生成气体组分,基于分解气体类型,构建气体传感器阵列。其次,模拟电缆过热故障,采集气体传感器在不同温度下的响应曲线,通过响应曲线的阈值判断过热温度区间。最后,以此为基础设计开关柜电缆过热检测装置,该装置在通风橱中大电流模拟电缆过热场景中能准确的区分出开关柜电缆过热状态并发出警报。

As a crucial component in power systems,cable faults in switchgear can lead to localized power outages.Traditional temperature measurement methods have limitations,such as requiring contact testing,high costs,and blind spots.To address these challenges,proposes a cable overheating detection method for switchgear based on semiconductor gas sensors.First,the study investigates the gas components generated from overheating of polyvinyl chloride(PVC),a material commonly used in cable insulation.Based on these decomposition gases,a gas sensor array is constructed.Then,simulated cable overheating scenarios are conducted to gather response curves from the gas sensors at various temperatures,using threshold values from these curves to identify temperature ranges indicative of overheating.Finally,a cable overheating detection device for switchgear is developed,which can accurately differentiate between overheating states and issue alarms under high-current simulated scenarios within a ventilated hood.