摘要
复合绝缘子是电网中的关键设备,在高湿高热的南方环境中,水分容易侵入复合绝缘子,有可能导致温升、机械破坏的事故发生。为研究湿热环境下水分侵入绝缘子压接界面的侵入路径,文中选取退役的复合绝缘子进行水煮试验和浸泡试验,并用傅里叶红外光谱、X射线光电子能谱、扫描电镜和EDS元素分析等工具分析了未经处理的绝缘子高压端密封胶试样和经过处理的绝缘子低压端密封胶试样在空气界面、护套界面、金具界面上的老化程度。通过试验得出结论:密封胶护套试样在实际运行的过程中会和护套发生交联反应;高压端密封胶试样老化情况比低压端密封胶试样更为严重;金具界面试样老化比空气界面试样更为严重;水分侵入复合绝缘子压接界面的路径主要是通过密封胶的金具界面进入。
Composite insulator is the key equipment in power grid.Under the hygrothermal environment southern China,the moisture is more likely to invade into the insulator,which might result in occurrence of temperature rise and mechanical damage.For studying the the invasion path of moisture into the crimping interface of the insulator in the hy⁃drothermal environment,the composite insulators out of operation are selected for boiling and socking test.Such tools as FTIR,XPS,SEM and EDS analysis are used to analyze the aging degree of the sealant at the high voltage sealing end of untreated insulator and and that at the low voltage sealing end of treated insulator on the interface of air,sheath and met⁃al fitting.It is concluded through the test that crosslink reaction of sealant sheath sample and sheath can occur during the operation.The aging condition of the sealant sample at the high⁃voltage end is more serious than that of the low⁃volt⁃age end.The aging of the fitting interface sample is more serious than that of the air interface.The path of invasion of moisture into the crimping interface of the insulator is mainly from the fitting interface of the sealant.
作者
李晓
李光茂
杨杰
杨森
杜钢
LI Xiao;LI Guangmao;YANG Jie;YANG Sen;DU Gang(Guangzhou Power Supply Bureau,Guangdong Power Grid Co.,Ltd.,Guangzhou 510420,China)
出处
《高压电器》
CAS
CSCD
北大核心
2022年第6期24-30,共7页
High Voltage Apparatus
基金
中国南方电网有限责任公司科技项目(GZHKJXM20190110)。
关键词
压接界面
复合绝缘子
密封胶
水分侵入
硅橡胶
crimping interface
composite insulator
sealant
moisture invasion
silicone rubber
