分离水珠在直流电场下的放电研究  

Study on Discharge of Separation Water Droplets under DC Field

作　　者：张宗喜[1] 

机构地区：[1]四川电力科学研究院,成都610072

出　　处：《高压电器》2011年第9期69-72,77,共5页High Voltage Apparatus

摘　　要：目前随着坚强智能电网建设的不断加快,电网电压等级不断升高,对电气设备的电气绝缘性能要求也随之不断提高。基于RTV涂料在防污方面的优势,涂敷RTV涂料的绝缘子其耐污闪能力显著提高,其主要原因在于RTV涂料的憎水性和憎水迁移性。但是当憎水性表面在充分受潮后,表面的许多临近细小水珠会汇聚成一个个大水珠,这些大水珠会严重畸变了介质的表面电场。笔者对比分析了憎水性表面分离水珠在直流和交流电场作用下的闪络电压,同时将不同介质和水珠的体积等影响因素引入具体实验中,分别分析了它们对闪络电压的影响。通过实验对直流电场下憎水性表面和亲水性表面分离水珠的电压闪络特性进行了研究分析,从而得出了两种情况下闪络电压的差异。With the accelerating construction of strong smart grid, and the： grid voltage level rising, performance requirements for the electrical insulation of electrical equipment also continue to increase. In terms of the advantages of RTV on antifouling, the ability of RTV-based paints coated insulator against pollution conditions can significantly increase, mainly due to RTV coating with hydrophobicity and migration. But when the hydrophobic surface is in the fully wet, many small dzrops of water on the surface will be gathered into to form large drops of water, which will distort the surface electric field. The flashover voltage of the hydrophobic surface＇s separated water droplets under DC and AC electric field are analyzed comparatively in this paper, while some influencing factors such as different dielectrics and volume of water drops, are introduced in specific experiments, and their effects on the flashover voltage are analyzed. The flashover voltages are studied for hydrophobic and hydrophilic surface under DC field in order to find the differences of flashover voltage in both cases.

关 键 词：憎水性 亲水性 水珠 表面电场 闪络电压 RTV 

分 类 号：TM85[电气工程—高电压与绝缘技术]