无雨环境中复合绝缘子表面积污饱和特性及影响因素研究  

Study on Surface Contamination Saturation Characteristics and Influence Factors of Composite Insulators in the Rainless Environment

作　　者：张重远[1] 刘继兴[1,2] 耿江海 黄志成[1] 刘云鹏[1] ZHANG Zhongyuan;LIU Jixing;GENG Jianghai;HUANG Zhicheng;LIU Yunpeng(Hebei Key Laboratory of Power Equipment Security Defense(North China Electric Power University),Baoding 071003,China;Tangshan of State Grid Jibei Electric Power Company Limited,Tangshan 063000,China)

机构地区：[1]河北省输变电设备安全防御重点实验室(华北电力大学),河北保定071003 [2]国网冀北电力有限公司唐山供电公司,河北唐山063000

出　　处：《华北电力大学学报（自然科学版）》2023年第5期56-67,共12页Journal of North China Electric Power University：Natural Science Edition

基　　金：南方电网公司科技项目(9210121086).

摘　　要：复合绝缘子作为输电线路外绝缘的重要元件,在运行过程中其表面会粘附污秽直至达到饱和。为定量研究无雨环境中电场力、曳力、粘附力等因素对绝缘子表面积污饱和特性的影响,设计了一种绝缘子饱和积污试验平台,以场致荷电方式控制污秽荷质比,进而控制颗粒所受电场力,加速饱和积污过程。同时,在积污区域通过风机营造了有风环境,在人工气候室内进行试验确保了温湿度恒定。通过该平台进行饱和积污试验,得到了不同电压及类型、污秽粒径、风速与相对湿度下的复合绝缘子积污特性曲线,并在风洞试验系统中做了进一步验证。试验结果表明:除风速和相对湿度外,其余因素只影响积污的快慢,而不改变饱和积污量;小粒径污秽在低荷质比情况下对积污的促进作用更为显著;饱和积污量和积污速率随风速增大而下降,随相对湿度增加而升高。研究结果可为建立科学合理的绝缘清扫制度提供参考。Composite insulators are important components of transmission line external insulation,and their surfaces will be stained by contamination continuously until reaching saturation.In order to study the effects of factors such as electric force,drag force and capillary force on contamination saturation characteristics on insulator surface in the rainless environment quantitatively,we designed an insulator saturation contamination test platform independently.The platform utilizes field-charging method to control charge-mass-ratio of particles,aiming to control the electric field force on particles and accelerate the saturated fouling process.Meanwhile,the fan was used to create windy environment in the contamination region so as to ensure the constant temperature and relative humidity of experiments in the artificial climate chamber.By utilizing the platform to launch the saturation tests,we obtained contamination characteristic curves of composite insulators under different voltage levels,voltage types,contamination particle sizes,wind speeds and relative humidity,which were further verified in the wind tunnel test system.The test results show that except for wind speed and relative humidity,the other factors only affect the contamination accumulation speed but not change the saturated contamination quality.The promoting effect of small size particles on contamination accumulation is more significant when the charge-mass-ratio is low.The saturated contamination quality and contamination accumulation speed will decline with the increasing of wind speed and increase with the increasing of relative humidity.The research results can be employed to provide reference for establishing scientific and reasonable insulation cleaning system.

关 键 词：复合绝缘子 饱和特性 NSDD 试验平台 污秽粘附 

分 类 号：TM85[电气工程—高电压与绝缘技术]