基于电导电流测试的硅橡胶复合绝缘子伞群材料老化特性分析
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摘要
为利用电导电流测试手段探究复合绝缘子伞群材料的老化特性,以现场运行的复合绝缘子为试验对象进行研究。通过电导电流测试得到相关试样的电老化阈值,探究了伞群位置、运行年限、环境污秽及运行电压等级等因素对硅橡胶材料电导电流特性的影响规律,并利用傅里叶红外光谱技术分析了相关基团的变化情况。试验表明,绝缘子串上场强分布高的位置、运行年限较长的绝缘子及运行地区环境污秽严重的绝缘子,其伞群材料的电老化阈值较低、电导电流较大且内部陷阱数量较多;运行电压等级对绝缘子老化程度的影响较小。利用电老化阈值评估伞群试样的老化状态与傅里叶红外光谱分析结果具有高度的一致性,表明通过硅橡胶伞群材料的电导电流测试得到的电老化阈值,可以反映复合绝缘子伞群材料的老化特性。
Taking being operated composite insulators as the object, the aging characteristics of composite insulators based on conduction current test is assessed. Electrical degradation threshold was got by the conduction current test, the influence of aging factors on electrical degradation threshold of the silicone rubber sheds such as shed locations, operating years, environment contamination levels and operating voltage levels were considered, and the changes of relevant groups of samples were studied with the Fourier transform infrared spectrum(FTIR) method. It is founded that the electrical degradation threshold of samples are lower, conduction current are larger and trap is more under the following situations: samples from the location where the electric field of the insulator string is higher; and samples from the insulators with a longer operation life or working in seriously polluted areas. The operation voltage almost has no influence on the aging state of insulators. Evaluating the sheds aging state by using the electric degradation threshold and FTIR analysis have high consistency, and indicates that electrical degradation threshold which got by the conduction current test can reflect the aging characteristics of silicone rubber sheds of composite insulators.
Taking being operated composite insulators as the object, the aging characteristics of composite insulators based on conduction current test is assessed. Electrical degradation threshold was got by the conduction current test, the influence of aging factors on electrical degradation threshold of the silicone rubber sheds such as shed locations, operating years, environment contamination levels and operating voltage levels were considered, and the changes of relevant groups of samples were studied with the Fourier transform infrared spectrum(FTIR) method. It is founded that the electrical degradation threshold of samples are lower, conduction current are larger and trap is more under the following situations: samples from the location where the electric field of the insulator string is higher; and samples from the insulators with a longer operation life or working in seriously polluted areas. The operation voltage almost has no influence on the aging state of insulators. Evaluating the sheds aging state by using the electric degradation threshold and FTIR analysis have high consistency, and indicates that electrical degradation threshold which got by the conduction current test can reflect the aging characteristics of silicone rubber sheds of composite insulators.
引文
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[18]陈晓春,郑敏聪,李建华.合成绝缘子硅橡胶伞群材料的老化特性及其红外光谱研究[J].中国电机工程学报,2012,32(S):57-61.Chen Xiaochun,Zheng Mincong,Li Jianhua.Aging characteristics of silicone rubber composite insulator sheds studied by infrared spectroscopy[J].Proceedings of the CSEE,2012,32(S):57-61.
[19]蓝磊,王汉良,文习山,等.高温硫化硅橡胶加速电晕老化试验分析及其寿命预测[J].高电压技术,2012,38(4):782-788.Lan Lei,Wang Hanliang,Wen Xishan,et al.Accelerated corona aging tests analysis and lifetime prediction of HTV silicone rubber[J].High Voltage Engineering,2012,38(4):782-788.
[2]戴罕奇,梅红伟,王黎明,等.复合绝缘子弱憎水性状态描述方法Ⅰ—静态接触角法的适用性[J].电工技术学报,2013,28(8):34-47.Dai Hanqi,Mei Hongwei,Wang Liming,et al.Description methodⅠfor unobvious hydrophobic state of composite insulators—usability of contact angle method[J].Transactions of China Electrotechnical Society,2013,28(8):34-47.
[3]刘洋,王建国,方春华,等.复合绝缘子转轮法老化试验系统设计与开发[J].高压电器,2012,48(5):69-74.Liu Yang,Wang Jianguo,Fang Chunhua,et al.Design and development of tracking wheel ageing test system of composite insulator[J].High Voltage Apparatus,2012,48(5):69-74.
[4]宿志一,陈刚,李庆峰,等.硅橡胶复合绝缘子伞群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,et al.Study on aging and criterion of sheds and housing of silicon rubber composite insulator[J].Power System Technology,2006,30(12):53-57.
[5]谢从珍,刘珊,刘芹,等.交流500 k V复合绝缘子内部缺陷对轴向电场分布的影响[J].高电压技术,2012,38(4):922-927.Xie Congzhen,Liu Shan,Liu Qin,et al.Internal defects influence of 500k V AC composite insulator on the electric field distribution along the axis[J].High Voltage Engineering,2012,38(4):922-927.
[6]屠幼萍,陈聪慧,佟宇梁,等.现场运行复合绝缘子伞群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 rubber composite insulators in service[J].High Voltage Engineering,2012,38(10):2522-2527.
[7]审文伟,宋伟,王国利,等.复合绝缘子HTV硅橡胶材料老化特性的研究[J].高压电器,2013,49(2):1-7.Shen Wenwei,Song Wei,Wang Guoli,et al.Influence of corona discharge on aging characteristics of HTV silicone rubber material[J].High Voltage Apparatus,2013,49(2):1-7.
[8]郑煜,关建东,王俏华,等.空间电荷与直流电导联合测试技术用于纳米Mg O抑制XLPE中空间电荷的研究[J].电工技术学报,2012,27(5):126-131.Zheng Yu,Wu Jiandong,Wang Qiaohua,et al.Research on the space charge suppressing mechanism of nanoMg O in XLPE with a joint measuring technology of DC conduction and space charge[J].Transactions of China Electrotechnical Society,2012,27(5):126-131.
[9]周远翔,郭绍伟,聂琼,等.纳米氧化铝对硅橡胶空间电荷特性的影响[J].高电压技术,2010,36(7):1605-1611.Zhou Yuanxiang,Guo Shaowei,Nie Qiong,et al.Influences of nano-alumina on the space charge behavir of silicone rubber[J].High Voltage Engineering,2010,36(7):1605-1611.
[10]Mazzanti G,Montanari G C.Quantities extracted from space-charge measurements as markers for insulations aging[J].IEEE Transactions on Dielectrics and Electrical Insulation,2003,10(2):198-203.
[11]Mazzanti G,Montanari G C,Alison J M.A spacecharge based method for the estimation of apparent mobility and depth as markers for insulation degradation[J].IEEE Transactions on Dielectrics and Electrical Insulation,2003,10(1):187-197.
[12]雷清泉,石林爽,田付强,等.电晕老化前后100HN和100CR聚酰亚胺薄膜的电导电流特性实验研究[J].中国电机工程学报,2010,30(13):109-114.Lei Qingquan,Shi Linshuang,Tian Fuqiang,et al.Experimental research on conduction current characterristics of 100HN and 100CR polyimide film before and after corona aging[J].Proceedings of the CSEE,2010,30(13):109-114.
[13]汪佛池,律方成,徐志钮,等.变频电机用聚酰亚胺薄膜电老化特性研究[J].高电压技术,2007,33(4):30-32.Wang Fochi,LüFangcheng,Xu Zhiniu,et al.Study on electrical aging characteristic of polyimide film used in frequency control motor[J].High Voltage Engineering,2007,33(4):30-32.
[14]周远翔,沙彦超,陈维江,等.变压器油与绝缘纸板电导特性研究[J].电网技术,2013,37(9):2527-2533.Zhou Yuanxiang,Sha Yanchao,Chen Weijiang,et al.Conduction characteristics in transformer oil and electrical insulation paper[J].Power System Technology,2013,37(9):2527-2533.
[15]Montanari G C.The electrical degradation threshold of polyethylene investigated by space charge and conduction current measurements[J].IEEE Transactions on Dielectrics and Electrical Insulation,2000,7(3):309-315.
[16]尹毅,陈炯,李喆,等.纳米Si Ox/聚乙烯复合材料强场电导特性的研究[J].电工技术学报,2006,21(2):22-26.Yin Yi,Chen Jiong,Li Zhe,et al.High field conduction of the composites of low-density polyethylene/nanoSi Ox[J].Transactions of China Electrotechnical Society,2006,21(2):22-26.
[17]张辉,屠幼萍,佟宇梁,等.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(15):169-174.Zhang Hui,Tu Youping,Tong Yuliang,et al.Study on aging characteristics of silicone rubber sheds of composite insulators based on TSC test[J].Proceedings of the CSEE,2012,32(15):169-174.
[18]陈晓春,郑敏聪,李建华.合成绝缘子硅橡胶伞群材料的老化特性及其红外光谱研究[J].中国电机工程学报,2012,32(S):57-61.Chen Xiaochun,Zheng Mincong,Li Jianhua.Aging characteristics of silicone rubber composite insulator sheds studied by infrared spectroscopy[J].Proceedings of the CSEE,2012,32(S):57-61.
[19]蓝磊,王汉良,文习山,等.高温硫化硅橡胶加速电晕老化试验分析及其寿命预测[J].高电压技术,2012,38(4):782-788.Lan Lei,Wang Hanliang,Wen Xishan,et al.Accelerated corona aging tests analysis and lifetime prediction of HTV silicone rubber[J].High Voltage Engineering,2012,38(4):782-788.