复合绝缘子污闪与冰闪特性及临界闪络电流研究
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摘要
绝缘子的电气特性是进行输电线路外绝缘设计的关键参数之一,其临界闪络电流对绝缘子的状态评估和闪络预警有着重要的作用。以FXBW–110/100型复合绝缘子为试品,在人工气候室对该绝缘子进行了人工污秽试验和人工覆冰试验。试验结果表明:复合绝缘子污闪和冰闪电压随着绝缘子表面盐密的增加而降低,冰闪和污闪电压与盐密均满足负幂指数关系,覆冰条件下的污秽特征指数与污秽无覆冰状态下的特征指数相差不大,可将覆冰视为一种特殊形式的污秽;在相同污秽条件下覆冰复合绝缘子的闪络电压比未覆冰的闪络电压低,随着覆冰厚度的增加,绝缘子闪络电压进一步降低;复合绝缘子污闪和冰闪的临界闪络电流与盐密满足幂指数关系,污闪和冰闪的临界闪络电流均随着绝缘子表面的盐密的增加而增加,在相同污秽条件下覆冰绝缘子的临界闪络电流比未覆冰的临界闪络电流更大。
The electrical characteristics of the insulators are one of the key parameters for the design of the external insulation of the transmission lines. Insulator critical flashover current plays an important role in condition assessment and flashover warning for insulators. In this paper, the artificial pollution test and artificial icing test of the FXBW-110/100 composite insulators are carried out in the artificial climate chamber. The test results show that the contamination flashover voltage and icing flashover voltage of composite insulator decrease with the increase of salt density on the surface of the insulator, which can be fitted as the exponential expression. The fitting parameters of the exponential expression under contamination condition with and without ice are almost same.Therefore, the icing condition can be considered as a special form of pollution condition. The flashover voltage of the insulators with icing is lower than that of the insulators without icing under the same pollution conditions. The flashover voltage decreases with the increasing of the thickness of icing layer on the insulator. The critical flashover current of icing and contamination composite insulators increases with the increase of SDD. The relationship can be fitted as exponential expression under the same pollution conditions, the critical flashover current(Ic) of ice covered insulators is larger than that without icing.
The electrical characteristics of the insulators are one of the key parameters for the design of the external insulation of the transmission lines. Insulator critical flashover current plays an important role in condition assessment and flashover warning for insulators. In this paper, the artificial pollution test and artificial icing test of the FXBW-110/100 composite insulators are carried out in the artificial climate chamber. The test results show that the contamination flashover voltage and icing flashover voltage of composite insulator decrease with the increase of salt density on the surface of the insulator, which can be fitted as the exponential expression. The fitting parameters of the exponential expression under contamination condition with and without ice are almost same.Therefore, the icing condition can be considered as a special form of pollution condition. The flashover voltage of the insulators with icing is lower than that of the insulators without icing under the same pollution conditions. The flashover voltage decreases with the increasing of the thickness of icing layer on the insulator. The critical flashover current of icing and contamination composite insulators increases with the increase of SDD. The relationship can be fitted as exponential expression under the same pollution conditions, the critical flashover current(Ic) of ice covered insulators is larger than that without icing.
引文
[1]蒋兴良,舒立春,孙才新.电力系统污秽与覆冰绝缘[M].北京:中国电力出版社,2009.
[2]关志成,刘瑛岩,周远翔,等.绝缘子及输变电设备外绝缘[M].北京:清华大学出版社,2006.
[3]梁英,陈逸昕,刘云鹏.运行复合绝缘子材料的体积电阻率-温度特性研究[J].电工技术学报,2014,29(10):312-317.LIANG Ying, CHEN Yixin, LIU Yunpeng. Research on characteristics of volume-resistivity and temperature for field composite insulators[J]. Transactions of China Electrotechnical Society, 2014,29(10):312-317.
[4]张启龙,风杰,吴萍,等.钢化玻璃绝缘子研究进展[J].材料科学与工程学报,2014, 32(4):596-601.ZHANG Qilong, FENG Jie, WU Ping, et al. State of the art of toughened glass insulators[J]. Journal of Materials Science&Engineering, 2014, 32(4):596-601.
[5] JIANG Xingliang, YUAN Jihe, ZHANG Zhijing. et al. Study on AC artificial-contaminated flashover performance of various types of insulators[J]. IEEE Transactions on Power Delivery, 2007, 22(4):2567-2574.
[6] FARZANEH M, BAKER T. Insulator icing test methods and procedures-A position paper prepared by the IEEE task force on insulator icing test methods[J]. IEEE Transactions on Power Delivery, 2003, 18(4):1503-1515.
[7] DEVENDRANATH D, CHANNAKESHAVA RAJKUMAR A D.Leakage current and charge in RTV coated insulators under pollution conditions[J]. IEEE Trans on Dielectrics and Electrical Insulation,2002, 9(2):294-299.
[8] JAHROMI A N, EL-HAG A H, JAYARA S H. A neural network based method for leakage current prediction of polymeric insulators[J]. IEEE Transactions on Power Delivery, 2006, 21(1):506-507.
[9] LI Jingyan, SUN Caixin, SEBO Stephen. Humidity and contamination severity impact on the leakage currents of porcelain insulators[J]. IET Generation, Transmission&Distribution, 2009, 5(1):19-28.
[10] JIANG Xingliang, WANG Shaohua, ZHANG Zhijin. Study on AC flashover performance and discharge process of polluted and iced IEC standard suspension insulator string[J]. IEEE Transactions on Power Delivery, 2007, 22(1):472-480.
[11] SUDA T. Frequency characteristics of leakage current waveforms of an artificially polluted suspension insulator[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2001, 8(4):705-710.
[12]蒋兴良,赵世华,毕茂强,等.污秽绝缘子闪络特性与泄漏电流特性研究[J].中国电机工程学报,2013, 31(11):220-226.JIANG Xingliang, ZHAO Shihua, BI Maoqiang, et al. Research on flashover performance and leakage current performance of polluted insulators[J]. Proceedings of the CSEE, 2013, 31(11):220-226.
[13]蒋兴良,赵世华,张志劲,等.污秽与憎水性对复合绝缘子泄漏电流特性的影响[J].高电压技术,2013,39(11):2573-2580.JIANG Xingliang, ZHAO Shihua, ZHANG Zhijing, et al. Impacts of contamination and hydrophobicity level on the leakage currents of composite insulators[J]. High Voltage Engineering, 2013, 39(11):2573-2580.
[14]赵世华,蒋兴良,张志劲,等.染污玻璃绝缘子泄漏电流特性及其闪络电压预测[J].电网技术,2014, 38(2):440-447.ZHAO Shihua, JIANG Xingliang, ZHANG Zhijing, et al. Flashover voltage prediction of polluted glass insulators based on the characteristics of leakage current[J]. Power System Technology,2014, 38(2):440-447.
[15]蒋兴良,毕茂强,黎振宇,等.自然条件下导线直流融冰与脱冰过程研究[J].电网技术,2013, 37(9):2626-2631.JIANG Xingliang, BI Maoqiang, LI Zhengyu, et al. Study on DC icemelting and ice shedding process under natural condition[J]. Power System Technology, 2013, 37(9):2626-2631.
[16]毕茂强,蒋兴良,周仿荣,等.复合绝缘子直流冰闪试验方法的比较[J].高电压技术,2012, 38(1):95-101.BI Maoqiang, JIANG Xingliang, ZHOU Fangrong, et al. Comparisim of DC flashover test methods for ice-covered composite insulators[J].High Voltage Engineering, 2012, 38(1):95-101.
[17] FARZANEH M, ZHANG J, LI Y. Effects of low air pressure on AC and DC arc propagation on ice surface[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2005, 12(1):60-71.
[18] FARZANEH M, LI Y, FIKKE S M, et al. DC flashover of artificial ice-covered insulators at low atmospheric pressure[C]//Proc. 9thInternational Offshore and Polar Engineering Conference, Brest,France, 1999:612-615.
[19]胡建林.低气压下覆冰绝缘子(长)串闪络特性及直流放电模型研究[D].重庆:重庆大学,2011.
[2]关志成,刘瑛岩,周远翔,等.绝缘子及输变电设备外绝缘[M].北京:清华大学出版社,2006.
[3]梁英,陈逸昕,刘云鹏.运行复合绝缘子材料的体积电阻率-温度特性研究[J].电工技术学报,2014,29(10):312-317.LIANG Ying, CHEN Yixin, LIU Yunpeng. Research on characteristics of volume-resistivity and temperature for field composite insulators[J]. Transactions of China Electrotechnical Society, 2014,29(10):312-317.
[4]张启龙,风杰,吴萍,等.钢化玻璃绝缘子研究进展[J].材料科学与工程学报,2014, 32(4):596-601.ZHANG Qilong, FENG Jie, WU Ping, et al. State of the art of toughened glass insulators[J]. Journal of Materials Science&Engineering, 2014, 32(4):596-601.
[5] JIANG Xingliang, YUAN Jihe, ZHANG Zhijing. et al. Study on AC artificial-contaminated flashover performance of various types of insulators[J]. IEEE Transactions on Power Delivery, 2007, 22(4):2567-2574.
[6] FARZANEH M, BAKER T. Insulator icing test methods and procedures-A position paper prepared by the IEEE task force on insulator icing test methods[J]. IEEE Transactions on Power Delivery, 2003, 18(4):1503-1515.
[7] DEVENDRANATH D, CHANNAKESHAVA RAJKUMAR A D.Leakage current and charge in RTV coated insulators under pollution conditions[J]. IEEE Trans on Dielectrics and Electrical Insulation,2002, 9(2):294-299.
[8] JAHROMI A N, EL-HAG A H, JAYARA S H. A neural network based method for leakage current prediction of polymeric insulators[J]. IEEE Transactions on Power Delivery, 2006, 21(1):506-507.
[9] LI Jingyan, SUN Caixin, SEBO Stephen. Humidity and contamination severity impact on the leakage currents of porcelain insulators[J]. IET Generation, Transmission&Distribution, 2009, 5(1):19-28.
[10] JIANG Xingliang, WANG Shaohua, ZHANG Zhijin. Study on AC flashover performance and discharge process of polluted and iced IEC standard suspension insulator string[J]. IEEE Transactions on Power Delivery, 2007, 22(1):472-480.
[11] SUDA T. Frequency characteristics of leakage current waveforms of an artificially polluted suspension insulator[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2001, 8(4):705-710.
[12]蒋兴良,赵世华,毕茂强,等.污秽绝缘子闪络特性与泄漏电流特性研究[J].中国电机工程学报,2013, 31(11):220-226.JIANG Xingliang, ZHAO Shihua, BI Maoqiang, et al. Research on flashover performance and leakage current performance of polluted insulators[J]. Proceedings of the CSEE, 2013, 31(11):220-226.
[13]蒋兴良,赵世华,张志劲,等.污秽与憎水性对复合绝缘子泄漏电流特性的影响[J].高电压技术,2013,39(11):2573-2580.JIANG Xingliang, ZHAO Shihua, ZHANG Zhijing, et al. Impacts of contamination and hydrophobicity level on the leakage currents of composite insulators[J]. High Voltage Engineering, 2013, 39(11):2573-2580.
[14]赵世华,蒋兴良,张志劲,等.染污玻璃绝缘子泄漏电流特性及其闪络电压预测[J].电网技术,2014, 38(2):440-447.ZHAO Shihua, JIANG Xingliang, ZHANG Zhijing, et al. Flashover voltage prediction of polluted glass insulators based on the characteristics of leakage current[J]. Power System Technology,2014, 38(2):440-447.
[15]蒋兴良,毕茂强,黎振宇,等.自然条件下导线直流融冰与脱冰过程研究[J].电网技术,2013, 37(9):2626-2631.JIANG Xingliang, BI Maoqiang, LI Zhengyu, et al. Study on DC icemelting and ice shedding process under natural condition[J]. Power System Technology, 2013, 37(9):2626-2631.
[16]毕茂强,蒋兴良,周仿荣,等.复合绝缘子直流冰闪试验方法的比较[J].高电压技术,2012, 38(1):95-101.BI Maoqiang, JIANG Xingliang, ZHOU Fangrong, et al. Comparisim of DC flashover test methods for ice-covered composite insulators[J].High Voltage Engineering, 2012, 38(1):95-101.
[17] FARZANEH M, ZHANG J, LI Y. Effects of low air pressure on AC and DC arc propagation on ice surface[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2005, 12(1):60-71.
[18] FARZANEH M, LI Y, FIKKE S M, et al. DC flashover of artificial ice-covered insulators at low atmospheric pressure[C]//Proc. 9thInternational Offshore and Polar Engineering Conference, Brest,France, 1999:612-615.
[19]胡建林.低气压下覆冰绝缘子(长)串闪络特性及直流放电模型研究[D].重庆:重庆大学,2011.