泄漏电流对染污沿面放电热特性的影响  

The Influence of Leakage Currents on Thermal Characteristics of Pollution Surface Discharge

作　　者：陈田[1] 叶齐政[2] 李春亮 熊鑫欣 黄文驰 

机构地区：[1]国网江西省电力科学研究院,江西省南昌市330096 [2]强电磁工程与新技术国家重点实验室(华中科技大学),湖北省武汉市430074 [3]广东电网有限责任公司揭阳供电局,广东省揭阳市522000

出　　处：《中国电机工程学报》2016年第10期2846-2852,共7页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51177059)~~

摘　　要：热量是影响污闪沿面放电的关键因素,为深入研究污闪沿面放电的机制,需要对沿面放电的热特性进行精确的定量分析。该文在印刷电路板上进行尖–板结构的染污沿面放电实验,借助红外热成像技术来定量测量沿面放电的表面温度分布。热成像结果显示,污秽度越高,表面温升越高。在外加电压未触发放电之前,表面温升完全来自表面泄漏电流;当发生沿面放电时,表面温升来自表面泄漏电流和放电电流的共同作用。通过分析热成像结果,发现在染污沿面放电中泄漏电流产生的表面温升大于放电电流产生的表面温升,并进一步得出了二者与外加电压的关系式。As a key factor affecting pollution flashover,the thermal characteristic should been accurately measured.Surface discharge with the point-plate electrode structure was designed on a printed circuit board.The temperature distribution of the plate surface was measured by the infrared thermal imaging.The temperature rising increases with the pollution degree.When a discharge couldn＇t be triggered by the applied voltage,leakage current is the only heat source.But when a surface discharge occurred,leakage currents and discharge currents would be the heat sources together.By analyzing the thermal results,it is concluded that the temperature rising caused by leakage currents is bigger than that caused by discharge currents.And the numerical relationship between the temperature risings and the applied voltage was got.

关 键 词：沿面放电 染污 表面温升 泄漏电流 

分 类 号：TM85[电气工程—高电压与绝缘技术]