复合绝缘子耐张串微风振动疲劳特性研究  

Research on Aeolian Vibration Caused Fatigue Properties of Strain Composite Insulator String

作　　者：李庆峰[1] 魏杰[2] 殷禹[2] 高海峰[2] 宿志一[2] 张学军[2] 

机构地区：[1]清华大学深圳研究生院,广东省深圳市518055 [2]中国电力科学研究院,北京市海淀区100192

出　　处：《电网技术》2012年第12期269-275,共7页Power System Technology

基　　金：国家电网公司科技项目(GY71-10-006)~~

摘　　要：耐张串使用复合绝缘子需考虑其在不同运行工况下的可靠性。微风振动发生频率高,是绝缘子运行中最常见的工况。概括了复合绝缘子及耐张串的使用现状,分析了复合绝缘子耐张串在微风振动时的受力情况,搭建了适用于特高压多串并联复合绝缘子耐张串振动研究的试验平台,并进行了多组复合绝缘子耐张串模拟微风振动试验。试验结果表明,微风振动引起复合绝缘子耐张串的机械性能下降不到5%,证明耐张串使用复合绝缘子是可行的。建议在现有复合绝缘子3 000万次振动试验后加入1.2倍额定机械负荷24 h耐受试验,以进一步考察其机械可靠性。For strain insulator strings using composite insulators it is necessary to consider its reliability under various operating conditions. In view of its high occurrence frequency, the aeolian vibration is the most common operating condition of insulator strings. The present application condition of composite insulators and strain insulator strings are summarily presented and the stress condition of strain sting composed of composite insulators under aeolian vibration is analyzed, and a testing platform is constructed for the research on vibration of parallel multi strain composite insulator strings applied in UHV power transmission lines and the simulated aeolian vibration test for multi-sets of strain composite insulator strings are performed. Test results show that the decrease of mechanical performance of strain composite insulator strings due to aeolian vibration is less than 5%, thus it is proved that applying composite insulators in strain string is feasible. It is recommended that to further assess its mechanical reliability a withstanding test of strain composite insulator string should be performed by applying 1.2 times of rated mechanical load with duration of 24 hours to it after the 30 million vibration test for strain composite insulator string.

关 键 词：复合绝缘子 耐张串 微风振动 可靠性 

分 类 号：TM216[一般工业技术—材料科学与工程]