摘要
在城市电网中,电弧导致的电气灼烧伤害愈发频繁。聚酰亚胺作为电弧防护材料具有耐高温、高阻热性,是保护带电作业人员生命安全的有效装备,但目前对于聚酰亚胺电弧防护材料的阻热实际效果研究相对较少。文中建立了有聚酰亚胺材料影响下的气体电弧温度场仿真模型,得到了燃弧过程中聚酰亚胺对电弧辐射温度场分布的影响。在实验室搭建了气体电弧发生装置,改变电弧电流大小、电弧电极间距、铜量热计测量点距电弧中心点距离,通过铜量热计测量温升得到聚酰亚胺防护材料对气体电弧辐射温度场的变化规律。仿真和试验结果表明,聚酰亚胺对气体电弧的辐射温度场具有明显的阻隔作用,其在不同的电弧辐射条件下均可以展现出良好的隔热性,证明了聚酰亚胺材料在带电作业环境中对气体电弧辐射具有优异的防护性能。
Electrical ignition injuries from arcing are becoming more frequent in urban power grid.Polyimide,as an arc protection material,has high temperature resistance and high heat resistance,and is an effective facility to pro⁃tect the safety of live workers.However,at present the study on the actual heat resistance effect of polyimide arc pro⁃tection materials is relatively less.In this paper,a simulation model of gas arc temperature filed under the influence of the polyimide is set up and the influence of polyimide on the arc radiation temperature field distribution during the arcing process is obtained.A gas arc generating device is set up in the laboratory,the variation of the polyimide pro⁃tection material to the gas arc radiation temperature field is obtained by way of changing the magnitude of arc cur⁃rent,the distance between the arc electrodes and the distance from the measurement point of the copper calorimeter to the center of the arc as well as of temperature rise measurement by copper calorimeter.The simulation and test re⁃sults show that the polyimide has obvious blocking effect on the radiation temperature field of gas arc,and shows per⁃fect heat insulation under different arc radiation conditions,proving that the polyimide material has excellent protec⁃tion performance against gas arc radiation in the live working environment.
作者
琚泽立
张一博
汤牧涵
侯喆
腾森
廖敏夫
段雄英
JU Zeli;ZHANG Yibo;TANG Muhan;HOU Zhe;TENG Sen;LIAO Minfu;DUAN Xiongying(State Grid Shaanxi Electric Power Research Institute,Xi’an 710054,China;State Grid Shaanxi Electric Power Company,Xi’an 710032,China;Dalian University of Technology,Liaoning Dalian 116024,China)
出处
《高压电器》
北大核心
2025年第1期89-95,共7页
High Voltage Apparatus
基金
国网陕西省电力公司科技项目(5226KY22000A)。
关键词
电弧
温度场
有限元仿真
聚酰亚胺
防电弧织物
热防护性能
arc
temperature field
finite element simulation
polyimide
arc⁃preventive fabric
thermal⁃preventive performance
作者简介
琚泽立(1983-),男,硕士,正高级工程师,研究方向为配电及电缆设备的运维检修、带电检测、状态诊断及评价、电气设备的安全防护技术等(E⁃mail:1678038@qq.com);通信作者:段雄英(1974-),女,博士,教授,博士生导师,研究方向为智能开关电器理论及应用、电力设备火灾检测与防护、电力设备在线检测与绝缘诊断等(E⁃mail:xyduan@dlut.edu.cn)。
