雷电冲击作用下表面污染对微型传感器闪络电压的影响  

Effect of Surface Contamination on Flashover Voltage of Micro-Sensor Under Lightning Impulse

作　　者：胡利 任勇 HU Li;REN Yong(State Grid Yili Yihe Power Supply Co.,Ltd.,Yili 835000,China)

机构地区：[1]国网伊犁伊河供电有限责任公司,新疆伊犁835000

出　　处：《河南科技》2023年第24期4-7,共4页Henan Science and Technology

摘　　要：【目的】为了发挥微型传感器作为配电网中的重要监测设备的功能,有必要对污秽条件下微型传感器的闪络特性进行分析。【方法】以微型传感器绝缘件环氧树脂为研究对象,利用固体层法模拟不同程度污秽,用冲击发生器产生雷电波,并进行了500多次雷电冲击试验。【结果】得到不同盐密(ρESDD)、灰密(ρNSDD)与雷电冲击闪络电压的关系,结果表明,ρESDD和ρNSDD均会对雷电冲击电压产生影响,即雷电冲击闪络电压会随二者的增加而降低。【结论】灰密的闪络电压分布和清洁条件下的分散度基本一致,盐密的闪络电压分散性显著增大。盐密和灰密的影响特征指数分别为0.17、0.12,即盐密的影响特征指数大于灰密。[Purposes]In order to give full play to the function of micro sensors as an important monitor⁃ing equipment in the distribution network,it is necessary to analyze the flashover characteristics of micro-sensors under polluted conditions.[Methods]Taking the epoxy resin of micro-sensor insulation as the research object,the solid layer method was used to simulate different degrees of contamination,and the lightning wave was generated by the impact generator,and more than 500 lightning impulse tests were carried out.[Findings]The relationship between different salt density(ρESDD),gray density(ρNSDD)and lightning impulse flashover voltage was obtained.The results show that bothρESDD andρNSDD will affect the lightning impulse voltage,which means that the lightning impulse flashover voltage will decrease with the increase of the two.[Conclusions]The distribution of flashover voltage in gray density was basi⁃cally consistent with the dispersion under clean conditions,and the dispersion of flashover voltage in salt density increased significantly.The influence characteristic indexes of salt density and gray density are 0.17 and 0.12,respectively,meaning that the influence characteristic index of salt density is greater than that of gray density.

关 键 词：微型传感器 污秽条件 绝缘特性 雷电冲击 

分 类 号：TM216[一般工业技术—材料科学与工程]