提高瓷支柱绝缘子干闪和湿闪电压的方法
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摘要
瓷支柱绝缘子作为一种重要的输变电设备,广泛应用于高压输变电工程中。为了增强瓷支柱绝缘子的外绝缘水平,以原有绝缘子母体为基础,在电极处和某些伞裙处设置主要由有机材料组成的附件系统(即绝缘子由电极、绝缘体和有机材料附件系统三部分组成)。根据电场分布理论、气体放电理论和沿面放电理论,通过设置附件系统来抑制工频干闪和湿闪放电现象的发展,从而达到提高绝缘子电气性能的目的。以上半截、下半截110k V瓷支柱绝缘子作为试品为例进行理论分析、试验对比以及计算机仿真,所得结果表明:在没有改变绝缘子母体结构的情况下,应用附件系统将上半截110kV瓷支柱的工频干闪电压和湿闪电压分别提高了15. 4%和14. 8%;将下半截110kV瓷支柱的工频干闪电压和湿闪电压分别提高了9. 9%和6. 1%。
As a kind of important power transmission and transformation equipment,the porcelain post insulator is widely used in high-voltage power transmission and transformation projects. In order to strengthen external level of the porcelain post insulator,the attachment system consisting mainly of organic material is placed on electrodes and some umbrella skirts on the basis of original insulator. Namely,the insulator proposed in this paper consists of three parts including electrodes,insulation body and attachment system made of organic material. According to electric field distribution theory,gas discharge theory and surface discharge theory,the attachment system is set to suppress development of power frequency dry flashover and wet flashover discharge phenomenon,so as to achieve the goal of improving insulator's electric property. Taking two trial products the upper half 110kV porcelain post insulator and the lower half 110kV porcelain post insulator,the paper makes theoretical analysis,experiment and computer simulation. The results showthat without changing original insulator structure,application of the attachment system has respectively increased power frequency dry flashover voltage and wet flashover voltage of the upper half 110kV porcelain post insulator by 15. 4% and 14. 8%,and has increased power frequency dry flashover voltage and wet flashover voltage of the lower half 110kV porcelain post insulator by 9. 9% and 6. 1% respectively.
As a kind of important power transmission and transformation equipment,the porcelain post insulator is widely used in high-voltage power transmission and transformation projects. In order to strengthen external level of the porcelain post insulator,the attachment system consisting mainly of organic material is placed on electrodes and some umbrella skirts on the basis of original insulator. Namely,the insulator proposed in this paper consists of three parts including electrodes,insulation body and attachment system made of organic material. According to electric field distribution theory,gas discharge theory and surface discharge theory,the attachment system is set to suppress development of power frequency dry flashover and wet flashover discharge phenomenon,so as to achieve the goal of improving insulator's electric property. Taking two trial products the upper half 110kV porcelain post insulator and the lower half 110kV porcelain post insulator,the paper makes theoretical analysis,experiment and computer simulation. The results showthat without changing original insulator structure,application of the attachment system has respectively increased power frequency dry flashover voltage and wet flashover voltage of the upper half 110kV porcelain post insulator by 15. 4% and 14. 8%,and has increased power frequency dry flashover voltage and wet flashover voltage of the lower half 110kV porcelain post insulator by 9. 9% and 6. 1% respectively.
引文
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[15]SHENOI K,GORUR R S.Evaluating station post insulator performance from electric field calculations[J].IEEE Transactions on Dielectrics&Electrical Insulation,2008,15(6):1731-1738.
[16]HRASTNIK J,PIHLER J.Designing a new post insulator using3-D electric-field analysis[J].IEEE Transactions on Pow er Delivery,2009,24(3):1377-1381.
[17]王燕,皇甫成,杜志叶,等.覆冰情况下输电线路有限元计算及其结构优化[J].电力系统保护与控制,2016,44(8):99-106.WANG Yan,HUANGFU Cheng,DU Zhiye,et al.Finite element calculation and structural optimization method for the high voltage transmission line under icing condition[J].Pow er System Protection and Control,2016,44(8):99-106.
[18]徐志钮,律方成,李和明,等.RTV和增爬裙对支柱绝缘子电场和电位分布影响的研究[J].华北电力大学学报(自然科学版),2010,37(4):1-6.XU Zhiniu,LFangcheng,LI Heming,et al.Influence of RTVand booster shed on electric field and potential distribution of post insulator[J].Journal of North China Electric Pover University(Natual Science Edition),2010,37(4):1-6.
[2]常彬,周秀,刘威峰,等.架空输电线路220 kV复合绝缘子闪络故障分析[J].内蒙古电力技术,2017,35(1):84-87,91.CHANG Bin,ZHOU Xiu,LIU Weifeng,et al.Flashover fault analysis of 220 kV composite insulators on overhead transmission line[J].Inner M ongolia Electric Pow er,2017,35(1):84-87,91.
[3]王娜娜,王刚,刘晓瑞,等.合成绝缘子在1 000 kV变电站悬垂绝缘子串中的应用研究[J].陕西电力,2016,44(7):61-64.WANG Nana,WANG Gang,LIU Xiaorui,et al.Research on application of composite insulator in 1 000 kV substation suspension insulator strings[J].Shaanxi Electric Pow er,2016,44(7):61-64.
[4]朱志芳,韩永霞,卢毓欣,等.±800 kV特高压换流站绝缘配合方案的普适性仿真分析[J].南方能源建设,2014,1(1):50-56.ZHU Zhifang,HAN Yongxia,LU Yuxin,et al.Simulation analysis of influence of DC protection on the overvoltage and insulation coordination of±800 kV UHVDC converter stations[J].Southern Energy Construction,2014,1(1):50-56.
[5]李红.安装增爬裙对支柱绝缘子电气性能的影响研究[J].电瓷避雷器,2015(6):22-26.LI Hong.Effect of booster shed arrangement on the electrical property of post insulator[J].Insulator and Surge Arresters,2015(6):22-26.
[6]王艳,马晓飞.增爬裙安装位置对支柱绝缘子闪络特性的影响[J].电瓷避雷器,2016(4):17-21.WANG Yan,M A Xiaofei.Effect of booster shed location on the insulation performance of post insulator[J].Insulator and Surge Arresters,2016(4):17-21.
[7]THIPPRASERT W,JIRAPONG P.Comparison of AC flashover performance for line post and pin post insulators in distribution 22kV[C]//International Conference on Electrical Engineering/electronics,Computer,Telecommunications and Information Technology.Piscataw ay:IEEE Press,2012:464-468.
[8]WU Songzhen.Electrical insulation materials science and engineering[M].Xi'an:Xi'an Jiaotong University Press,1996.
[9]MARDIKA M G,PURI T A,Suwarno,et al.High voltage test on 245 kV post insulators w ith different materials[C]//International Conference on Information Technology and Electrical Engineering.Piscataw ay:IEEE Press,2016.
[10]张德赛.一种能提高外绝缘电气强度的绝缘子:中国,ZL200810197722.5[P].2009-04-15.
[11]ZHANG Desai.The new method of improving external insulation strength of HV equipment[C]//INM R World Congress on Insulators,Arresters,Bushings and Cable Accessories.Piscataw ay:IEEE Press,2009.
[12]ZHANG D S.What is the next step to insulator in the future[C]//INMR World Congress on Insulators,Arresters,Bushings and Cable Accessories.Piscataw ay:IEEE Press,2011:17-20.
[13]熊刚,张德赛,余长国.应用屏障装置提高复合线路绝缘子的外绝缘性能[J].电瓷避雷器,2012(5):5-8.XIONG Gang,ZHANG Desai,YU Changguo.Improvement of external insulation properties of the composite line insulator w ith barrier device[J].Insulator and Surge Arresters,2012(5):5-8.
[14]邓世聪,周荣林,张德赛,等.应用附件系统提高线路绝缘子的工频干闪络和湿闪络电压[J].武汉大学学报(工学版),2014,47(6):820-824.DENG Shicong,ZHOU Ronglin,ZHANG Desai,et al.Improvement of dry flashover voltage and w et flashovervoltage of line insulators w ith accessories system[J].Engineering Journal of Wuhan University,2014,47(6):820-824.
[15]SHENOI K,GORUR R S.Evaluating station post insulator performance from electric field calculations[J].IEEE Transactions on Dielectrics&Electrical Insulation,2008,15(6):1731-1738.
[16]HRASTNIK J,PIHLER J.Designing a new post insulator using3-D electric-field analysis[J].IEEE Transactions on Pow er Delivery,2009,24(3):1377-1381.
[17]王燕,皇甫成,杜志叶,等.覆冰情况下输电线路有限元计算及其结构优化[J].电力系统保护与控制,2016,44(8):99-106.WANG Yan,HUANGFU Cheng,DU Zhiye,et al.Finite element calculation and structural optimization method for the high voltage transmission line under icing condition[J].Pow er System Protection and Control,2016,44(8):99-106.
[18]徐志钮,律方成,李和明,等.RTV和增爬裙对支柱绝缘子电场和电位分布影响的研究[J].华北电力大学学报(自然科学版),2010,37(4):1-6.XU Zhiniu,LFangcheng,LI Heming,et al.Influence of RTVand booster shed on electric field and potential distribution of post insulator[J].Journal of North China Electric Pover University(Natual Science Edition),2010,37(4):1-6.