500 kV核惠线合成绝缘子异常发热原因分析
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摘要
由于优越的防污闪性能,合成绝缘子被大量应用于超特高压输电线路中。本文对深圳地区一起500 k V交流复合绝缘子异常发热缺陷进行了详细的分析,通过外观检查、不同湿度下的加压试验、水扩散试验、吸水性试验以及官能团分析,确定了老化水解形成的极性基团以及侵入硅橡胶内部的水分是诱发合成绝缘子发热的主要原因,同时发热将加速硅橡胶材料的老化。试验结果还表明,在新入网复合绝缘子性能评估过程中,除交界面耐水解性能外,还应关注硅橡胶材料的饱和吸水量。
For their outstanding resistance to the contamination flashover,composite insulators have been widely used in the EHV/UHV transmission lines. In this paper,an abnormal heating defect in 500 k V AC composite insulator operated in Shenzhen has been studied. With the visual test,AC voltage withstanding test,w ater diffusion test,absorption test and FTIR test,it is confirmed that w ater absorbed in the sheath and polar group generated from the aging process are the main reasons of the heating of composite insulators,and the heating process will accelerate the aging process at the same time. The test results also show that during the performance evaluation of newly accepted composite insulators,the saturation absorption water of silicone rubber should be considered besides the interfacial resistance to hydrolysis performance.
For their outstanding resistance to the contamination flashover,composite insulators have been widely used in the EHV/UHV transmission lines. In this paper,an abnormal heating defect in 500 k V AC composite insulator operated in Shenzhen has been studied. With the visual test,AC voltage withstanding test,w ater diffusion test,absorption test and FTIR test,it is confirmed that w ater absorbed in the sheath and polar group generated from the aging process are the main reasons of the heating of composite insulators,and the heating process will accelerate the aging process at the same time. The test results also show that during the performance evaluation of newly accepted composite insulators,the saturation absorption water of silicone rubber should be considered besides the interfacial resistance to hydrolysis performance.
引文
[1]关志成,彭功茂,王黎明,等.复合绝缘子的应用及关键技术研究[J].高电压技术,2011,37(3):513-519.GUAN Zhicheng,PENG Gongmao,WANG Liming,et al.Application and key technical study of composite insulators[J].High Voltage Engineering,2011,37(3):513-519.
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[11]陈桂阳,成立,裴慧坤,等.高湿度地区交流复合绝缘子发热机理及控制措施研究[J].陕西电力,2014,42(10):49-54.CHEN Guiyang,CHENG Li,PEI Huikun,et al.Mechanism and solution for the AC composite insulator heated in the high humidity area[J].Shaanxi Electric Pow er,2011,37(3):513-519.
[12]国家电网公司.电力系统污区分级与外绝缘选择标准:QG-DW152-2006[S].北京:国家电网公司,2006.
[13]中国电器工业协会.标称电压高于1 000 V的交流架空线路用复合绝缘子-定义、试验方法及验收准则:GB/T 19519-2014[S].北京:中国标准出版社,2014.
[14]CARTER H G,KIBLER K G.Langmuir-type model for anomalous moisture diffusion in composite resins[J].Composite M aterials,1978(12):118-131.
[15]LUTZ B,CHENG L,GUAN Z,et al.Analysis of a fractured500 k V composite insulator identification of aging mechanisms and their causes[J].IEEE Transactions on Dielctrics and Electrical Insulation,2012,19(5):1723-1731.
[16]张振泉,付豪,李耀中,等.复合绝缘子伞裙硬化机理研究[J].环境技术,2015(2):54-58.ZHANG Zhenquan,FU Hao,LI Yaozhong,et al.The harden mechanism of the umbrella of composite insulator[J].Environmental Technology,2015(2):54-58.
[2]宋磊,张福增,梁曦东,等.高海拔特高压并联绝缘子的直流污闪特性[J].高电压技术,2013,39(6):1382-1389.SONG Lei,ZHANG Fuzeng,LIANG Xidong,et al.DC pollution flashover performance of ultra high voltage parallel double insulators in high altitude area[J].High Voltage Engineering,2013,39(6):1382-1389.
[3]吴光亚,郭贤珊,张锐.特高压直流输电线路污秽外绝缘设计及配置[J].高电压技术,2008,34(5):862-866.WU Guangya,GUO Xianshan,ZHANG Rui.Pollution external in-sulation design and arrangement of UHVDC transmission line[J].High Voltage Engineering,2008,34(5):862-866.
[4]屠幼萍,陈聪慧,佟宇梁,等.现场运行复合绝缘子伞裙材料的老化判断方法[J].高电压技术,2012,38(10):2522-2527.TU Youping,CHEN Conghui,TONG Yuliang,et al.Aging characteristics of shed materials of silicone rubbercomposite insulators in service[J].High Voltage Engineering,2012,38(10):2522-2527.
[5]TU Youping,GONG Bo,YUAN Zhikang,et al.Moisture induced local heating of overhead line composite insulators[J].IEEE Transactions on Dielectrics and Electrical Insulation,2017,24(1):483-489.
[6]YUAN Zhikang,TU Youping,ZHAO Yongfei,et al.Analysis on heat source of abnormal temperature rise of composite insulator housings[J].IEEE Transactions on Dielectrics and Electrical Insulation,2017,24(6):3578-3585.
[7]COSTA E G D,FERREIRA T V,NERI M G G,et al.Characterization of polymeric insulators using thermal and UV imaging under laboratory conditions[J].IEEE Transactions on Dielectrics&Electrical Insulation,2009,16(16):985-992.
[8]PIHERA J,MARTINEK P,KLASNA J,et al.Partial discharges of thermally and electrically aged insulation[C]//Electrical Insulation and Dielectric Phenomena,IEEE Conference on CEIDP,October 18-21,2009,Virginia Beach,VA,USA.New York:IEEE,2009:39-42.
[9]TU Y,GONG B,WANG C,et al.Effect of moisture on temperature rise of composite insulators operating in pow er system[J].IEEE Transactions on Dielectrics&Electrical Insulation,2015,22(4):2207-2213.
[10]魏远航,陈润华.高压输电线路复合绝缘子发热机理的研究[J].高电压技术,2007,33(5):25-28.WEI Yuanhang,CHEN Runhua.Analysis of the heating process of composite insulators used in the high voltage transmission lines[J].High Voltage Engineering,2007,33(5):25-28.
[11]陈桂阳,成立,裴慧坤,等.高湿度地区交流复合绝缘子发热机理及控制措施研究[J].陕西电力,2014,42(10):49-54.CHEN Guiyang,CHENG Li,PEI Huikun,et al.Mechanism and solution for the AC composite insulator heated in the high humidity area[J].Shaanxi Electric Pow er,2011,37(3):513-519.
[12]国家电网公司.电力系统污区分级与外绝缘选择标准:QG-DW152-2006[S].北京:国家电网公司,2006.
[13]中国电器工业协会.标称电压高于1 000 V的交流架空线路用复合绝缘子-定义、试验方法及验收准则:GB/T 19519-2014[S].北京:中国标准出版社,2014.
[14]CARTER H G,KIBLER K G.Langmuir-type model for anomalous moisture diffusion in composite resins[J].Composite M aterials,1978(12):118-131.
[15]LUTZ B,CHENG L,GUAN Z,et al.Analysis of a fractured500 k V composite insulator identification of aging mechanisms and their causes[J].IEEE Transactions on Dielctrics and Electrical Insulation,2012,19(5):1723-1731.
[16]张振泉,付豪,李耀中,等.复合绝缘子伞裙硬化机理研究[J].环境技术,2015(2):54-58.ZHANG Zhenquan,FU Hao,LI Yaozhong,et al.The harden mechanism of the umbrella of composite insulator[J].Environmental Technology,2015(2):54-58.