[1]韦晓星,徐 驰,卢文浩,等.运行多年的液体硅橡胶套管老化特征及修复效果评估[J].电瓷避雷器,2020,(03):197-204.[doi:10.16188/j.isa.1003-8337.2020.03.031]
 WEI Xiaoxing,XU Chi,LU Wenhao,et al.Ageing Characteristics and Repairing Evaluation of Long-Term Operating LSR Bushings[J].,2020,(03):197-204.[doi:10.16188/j.isa.1003-8337.2020.03.031]
点击复制

运行多年的液体硅橡胶套管老化特征及修复效果评估()
分享到:

《电瓷避雷器》[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2020年03期
页码:
197-204
栏目:
绝缘子
出版日期:
2020-06-25

文章信息/Info

Title:
Ageing Characteristics and Repairing Evaluation of Long-Term Operating LSR Bushings
作者:
韦晓星1 徐 驰2 卢文浩1 陈 灿2 刘婉莹1 贾志东2
(1.南方电网超高压输电公司检修试验中心,广州510663; 2.清华大学深圳研究生院,深圳518055)
Author(s):
WEI Xiaoxing1 XU Chi2 LU Wenhao1CHEN Can2 LIU Wanying1 JIA Zhidong2
(1.EHV Power Transmission Company Maintenance & Test Center, China Southern Power Grid,Guangzhou 510663, China; 2.Graduate School of Tsinghua University, Shenzhen 518055, China)
关键词:
液体硅橡胶 老化 粉化层 傅里叶变换红外光谱 X射线光电子能谱
Keywords:
liquid silicone rubber aging chalking layer fourier transform infrared spectrum X-ray diffraction spectrum
DOI:
10.16188/j.isa.1003-8337.2020.03.031
摘要:
1999年投运500 kV高压直流套管户外侧出现严重的粉化龟裂现象,该套管外绝缘护套采用液体硅橡胶(LSR),并于2015年采用RTV进行外绝缘修复。通过憎水性、憎水迁移性、拉伸强度和撕裂强度测试分析了复合套管伞裙的宏观老化特征; 借助扫描电子显微镜(SEM)、傅里叶变换红外光谱(FTIR)、X射线光电子能谱(XPS)等手段分析了套管伞裙老化的微观特征; 同时对修复后的套管伞裙性能进行评估。研究发现,液体硅橡胶伞裙老化由外表面向内部逐渐发展,具有明显的粉化层和未粉化层,老化后伞裙的憎水性、憎水迁移性、拉伸强度和撕裂强度均有不同程度的下降。微观下老化伞裙出现不规则片状分层,表面粗糙不平,附着力大大降低; 粉化层中聚二甲基硅氧烷(PDMS)侧链有机基团被氧化,交联形成更多Si-O-Si键,同时伴随着TiO2和白炭黑填料的析出; 由于老化过程中硅橡胶材料从有机向无机转变,粉化层中C元素和Si元素含量降低,O元素含量升高。研究表明,通过喷涂RTV修复老化的液体硅橡胶伞裙能够改善憎水性和憎水迁移性,但仍需定期监测修复套管的外观及憎水性变化。
Abstract:
A serious aging problem happened on the outer part of 500 kV DC wall bushings which have been operatingsince 1999. The bushings sheds were manufactured by liquid silicone rubber, and repaired by RTV in 2015. In this paper, the macroscopic aging characteristics of the aging sheds were investigated by hydrophobicity and hydrophobicity transfer test, tensile and tear strength test. Then the microscopic characteristics of the aging sheds were obtained by using Scanning Electron Microsope(SEM), Fourier Transform Infrared Spectroscopy(FTIR)and X-ray Photoelectron Spectroscopy(XPS). Meanwhile the status of the bushing after repairing was also evaluated in the end. It was found that the aging of the LSR shed developed from outer surface into the inside, and the layer structure including the chalking layer and the inner layer was obviously observed. The hydrophobicity, hydrophobicity transfer, tensile strength and tear strength of the aging sheds had different decrease. At microcosmic angle of view, the aging sheds appeared irregular shaped patches with a reduced surface roughness and adhesion; FTIR and XPS results indicated that the side chain groups of polydimethylsiloxane(PDMS)in the chalking layer were oxidized, and crosslinked with other polysiloxane chains, forming more Si-O-Si groups, accompanied by the precipitation of TiO2 and white carbon black fillers. Due to the change of silicone rubber material from organic to inorganic in the aging process, the content of C and Si elements in the powder layer decreased, and the content of O element increased.The research also shows that, the hydrophobicity and hydrophobicity transfer of the aging LSR sheds can be improved by RTV repairing, but the appearance and hydrophobic changes still needs to be regularly monitored in the operation.

参考文献/References:

[1] 梁曦东,李少华.电力系统有机外绝缘的发展与展望[J].南方电网技术,2016, 10(3):58-65.
LIANG Xidong, LI Shaohua. Development and prospect of organicoutdoor insulation in power system[J]. Southern Power System Technology, 2016, 10(3): 58-65.
[2]韦晓星,黎建平,楚金伟,夏谷林,陈伟.换流站复合外绝缘应用及雨闪事故分析[J].高电压技术,2017, 43(12):3958-3963.
WEI Xiaoxing, LI Jianping, CHU Jinwei, XIA Gulin, CHEN Wei. Application of composite insulators and analysis of rain flashover in converter stations[J]. High Voltage Engineering, 2017, 43(12): 3958-3963.
[3]魏杰,高海峰,黄瑞平,宿志一,陕华平.±500 kV换流站直流场主设备典型外绝缘故障分析及对策[J].电网技术,2012, 36(12):276-282.
WEI Jie, GAO Haifeng, HUANG Ruiping, SU Zhiyi, SHAN Huaping. Analysis and countermeasure on typical external insulation failure of main equipments of ±500 kV converter stations[J]. Power System Technology, 2012, 36(12): 276-282.
[4]来国桥,幸松民.有机硅产品合成工艺及应用[M].2版.北京:化学工业出版社,2010.
[5]成立,梅红伟,王黎明,张福增,董弘川.复合绝缘子用硅橡胶护套长时间老化特性及其影响因素[J].电网技术,2016, 40(6):1901-1907.
CHENG Li, MEI Hongwei, WANG Liming, ZHANG Fuzeng, DONG Hongchuan. Study on long-term aging characteristics and impact factors for silicone rubber sheath of composite insulators[J]. Power System Technology, 2016, 40(6): 1901-1907.
[6]宿志一,陈刚,李庆峰,殷禹.硅橡胶复合绝缘子伞裙护套的老化及其判据研究[J].电网技术,2006, 30(12):53-57.
SU Zhiyi, CHEN Gang, LI Qingfeng, YAN Yu. Study on aging and criterion of sheds and housing of silicon rubber composite insulator[J]. Power System Technology, 2006, 30(12): 53-57.
[7]章涛,李国伟,王俊波.硅橡胶复合套管用FB-PRTV修复后性能分析[J].高压电器,2011, 47(10):63-68.
ZHANG Tao, LI Guowei, WANG Junbo. Performance evaluation for RTV composite casing after renovated by FB-PRTV[J]. High Voltage Apparatus, 2011, 47(10): 63-68.
[8]屠幼萍,陈聪慧,佟宇梁,张辉,卢毅,谢丽芳.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, ZHANG Hui, LU Yi, XIE Lifang. Aging characteristics of shed materials of silicone rubber composite insulators in service[J]. HighVoltage Engineering, 2012, 38(10): 2522-2527.
[9]EL-HAG A H, JAYARAM S, CHERNEY E A. Low frequency harmonic components of leakage current as a diagnostic tool to study aging of silicone rubber insulators[C]2001 Annual Report Conference on Electrical Insulation and Dielectric Phenomena(Cat. No.01CH37225).[S.l.]:[s.n.], 2001: 597-600.
[10]张辉,屠幼萍,佟宇梁,李庆峰,邓桃.基于 TSC 测试的硅橡胶复合绝缘子伞裙材料老化特性研究[J].中国电机工程学报,2012, 32(19):169-174.
ZHANG Hui, TU Youping, TONG Yuliang, LI Qingfeng,DENG Tao. Study on aging characteristcs of silicone rubber sheds of composite insulators based on TSC test[J]. Proceedings of the Chinese Society for Electrical Engineering, 2012, 32(19): 169-174.
[11]谢从珍,袁超,胡长猛,浧李立,赵华忠.±800 kV直流耐张串复合绝缘子伞裙材料的老化特性[J].中国电机工程学报,2015, 35(3):735-741.
XIE Congzhen, YUAN Chao, HU Changmeng, YING Lili, ZHAO Huazhong. Aging characteristics of shed materials of composite insulators in ±800 kV DC tension strings[J]. Proceedings of the CSEE, 2015, 35(3): 735-741.
[12]汪佛池,律方成,杨升杰,刘杰,李宁彩.基于FTIR的110 kV复合绝缘子硅橡胶伞裙老化性能分析[J].电工技术学报,2015, 30(8):297-303.
WANG Fochi, LV Fangcheng, YANG Shengjie, LIU Jie, LI Ningcai. The aging characteristic of Silicon rubber sheds of 110 kV composite insulators based on FTIR test[J]. Transactions of China Electrotechnical Society, 2015, 30(8): 297-303.
[13]彭向阳,林宏升,黄振,周宇明,张妮,方鹏飞.应用显微红外法的硅橡胶复合绝缘子伞裙老化深度研究[J].电网技术,2017, 41(4):1350-1356.
PENG Xiangyang, LIN Hongsheng, HUANG Zhen, ZHOU Yuming, ZHANG Ni, FANG Pengfei. An infrared microspectroscopy method for determining degradation depth of silicone rubber composite insulator shed[J]. Power System Technology, 2017, 41(4): 1350-1356.
[14]梁英,张君成,靳哲.交流电晕老化对复合绝缘子体积电阻率-温度特性的影响[J].高电压技术,2016, 42(12):3875-3880.
LIANG Ying, ZHANG Juncheng, JIN Zhe. Characteristics of volume-resistivity and temperature under AC corona for composite insulators[J]. High Voltage Engineering, 2016, 42(12): 3875-3880.
[15]梁英,靳哲,刘云鹏,陈逸昕.基于陷阱特性的运行复合绝缘子老化定量评估[J].电工技术学报,2015, 30(18):189-195.
LIANG Ying, JIN Zhe, LIU Yunpeng, CHEN Yixin. The quantitative-evaluation on the aging condition of composite insulators based on trapcharacteristics[J]. Transactions of China Electrotechnical Society, 2015, 30(18): 189-195.
[16]陈灿,王希林,贾志东,李桐,陆海,曾向君,李锐海.基于高分子结晶分析方法的液体硅橡胶老化机制研究[J].中国电机工程学报,2014, 34(9):1462-1470.
CHEN Can, WANG Xilin, JIA Zhidong, LI Tong, LU Hai, ZENG Xiangjun, LI Ruihai. A polymer crystallization based study on the degradation mechanism of liquid silicone rubber[J]. Proceedings of the CSEE, 2014, 34(9): 1462-1470.
[17]屠幼萍,王倩,李敏,丁立健.臭氧浓度对HTV硅橡胶材料的老化作用[J].电工技术学报,2013, 28(1):21-28.
TU Youping, WANG Qian, LI Min, DING Lijian. Influence of ozone concentration on deterioration of HTV Silicon rubber[J]. Transactions of China Electrotechnical Society, 2013, 28(1): 21-28.
[18]徐征,程江艳,吴嘉敏,何为.用于复合绝缘子伞裙老化无损检测的单边核磁共振方法[J].中国电机工程学报,2014, 34(36):6545-6553.
XU Zheng, CHENG Jiangyan, WU Jiamin, HE Wei. Non-destructive aging detection method for silicone rubber insulator shed based on unilateral NMR principle[J]. Proceedings of the CSEE, 2014, 34(36): 6545-6553.
[19]ROWLAND S, ROBERTSON J, XIONG Y, DAY R. Electrical and material characterization of field-aged 400 kV silicone rubber composite insulators[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2010, 17(2): 375-383.
[20]朱孟周,李成钢,刘洋,周志成.复合套管液体硅橡胶伞群老化现象的微观特性研究[J].电力与能源,2015, 36(1):68-72.
ZHU Mengzhou, LI Chenggang, LIU Yang, ZHOU Zhicheng. Micro structual characterization of liquid silicone rubber's aging phenomenon used for composite bushing[J]. Power & Energy, 2015, 36(1): 68-72.
[21]GHANBARI-SIAHKALI Afshin, MITRA Susanta, KINGSHOTT Peter, ALMDALKristoffer, CARSTEN Bloch, REHMEIER Helle Kem. Investigation of the hydrothermal stability of cross-linked liquid silicone rubber(LSR)[J]. Polymer Degradation and Stability, 2005, 90(3): 471-480.
[22]罗兵, 张福增, 梁曦东. 南方电网复合支柱绝缘子及穿墙套管运行情况及问题分析[C].甘肃敦煌: 2015 变电站复合绝缘子技术及应用国际研讨会, 2015
[23]韦晓星,张晋寅,夏谷林,刘青松,孙勇,阳少军.500 kV高压直流穿墙套管端部机械连接故障检测与分析[J].电瓷避雷器,2017(4):171-177.
WEI Xiaoxing, ZHANG Jinyin, XIA Gulin, LIU Qingsong, SUN Yong, YANG Shaojun. Detection and analysis of mechanical connection fault at the terminal of 500 kV HVDC wall bushing[J]. Insulators and Surge Arresters, 2017(4): 171-177.
[24]IMAI Takahiro, SAWA Fumio, OZAKI Tamon, INOUE Yoshiyuki, TOSHIO Shimizu, TANAKA Toshikatsu. Roles of fillers on properties of Nano-TiO2 and Micro-SiO2 filler mixed composites[C]2007 IEEE International Conference on Solid Dielectrics.[S.l.]:[s.n.], 2007: 407-410.
[25]高岩峰,王家福,梁曦东,阎志鹏,刘瑛岩.交直流电晕对高温硫化硅橡胶性能的影响[J].中国电机工程学报,2016, 36(1):274-284.
GAO Yanfeng, WANG Jiafu, LIANG Xidong, YAN Zhipeng, LIU Yingyan. Influence of AC and DC corona on high temperature vulcanized silicone rubber[J]. Proceedings of the CSEE, 2016, 36(1): 274-284.

备注/Memo

备注/Memo:
收稿日期:2018-08-14 作者简介:韦晓星(1985—),男,博士,工程师,主要从事换流站/变电站设备高电压试验技术、复合绝缘子老化以及外绝缘污雨闪防治等研究工作。 基金项目:国家自然科学基金资助项目(编号:51707021)。
更新日期/Last Update: 2020-07-07