220 kV线路雷击闪络限制器对复合绝缘子电场分布的影响研究
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摘要
根据220 kV同塔双回输电线路线路实际结构,考虑铁塔、分裂导线、均压环、Zn O电阻片的介电性和导电性等因素的影响,采用时谐电场三维有限元计算方法,以对比的方式研究了220 kV架空输电线路雷击闪络限制器对复合绝缘子串、均压环电位及电场强度分布的影响;研究结果表明,闪络限制器提高了电位及电场强度沿复合绝缘子分布的均匀性,降低了复合绝缘子电场强度最大值;限制器使上均压环表面场强略有增加,使下均压环表面电场强度略有减小,但电场强度最大值远低于限制值。
According to the actual structure of 220 kV double-circuit transmission line,consider the influence of the factors such as the tower,the bundle conductor,the grading ring,the dielectric and the conductivity of the Zn O resistor,using the three-dimensional finite element method of time harmonic electric field,the influence of the lightning flash limiter on the distribution of the insulator string,the grading ring and the electric field intensity of the 220 kV overhead transmission line is studied in a comparative way; Research indicates,the flashover limiter improves the uniformity of the potential and the electric field intensity along the distribution of the composite insulator,and reduces the maximum electric field strength of the composite insulator; the field strength of the upper grading ring is slightly increased,but the maximum electric field strength is much lower than the limit value.
According to the actual structure of 220 kV double-circuit transmission line,consider the influence of the factors such as the tower,the bundle conductor,the grading ring,the dielectric and the conductivity of the Zn O resistor,using the three-dimensional finite element method of time harmonic electric field,the influence of the lightning flash limiter on the distribution of the insulator string,the grading ring and the electric field intensity of the 220 kV overhead transmission line is studied in a comparative way; Research indicates,the flashover limiter improves the uniformity of the potential and the electric field intensity along the distribution of the composite insulator,and reduces the maximum electric field strength of the composite insulator; the field strength of the upper grading ring is slightly increased,but the maximum electric field strength is much lower than the limit value.
引文
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[16]许安,杨翔,贾文彬.220 k V带纯空气间隙线路避雷器的电场分析[J].电瓷避雷器,2016,270(2):100-105.XU An,YANG Xiang,JIA Wenbin.The electric field analysis of 220 k V line arrester with pure air gap[J].Insulators and Surge Arresters,2016,270(2):100-105.
[17]熊泰昌.电力避雷器[M].北京:中国水利电力出版社,2013.
[2]ZHAO T,COMBER M G.Calculation of electric field and potential distribution along nonceramic insulators considering the effects of conductors and transmission towers[J].Power Delivery,IEEE Transactions on,2000,15(1):313-318.
[3]PHILLIPS A.Electric field distribution and their impact on transmission line composite insulators[C]IEEE PESTransmission and Distribution Conference and Exposition Orlando.FL:IEEE Power&Energy Soc,2012:1-3.
[4]HUANG Daochun,ZHENG Zheng,HUANG Zhengfang,et al.Study on parameters design and corona characteristics test equivalent of grading rings for 1000 k V UHV AC compact transmission line[C]2013 IEEE CONFERENCE ON E-LECTRICAL INSULATION AND DIELECTRIC PHENOME-NA(CEIDP).[S.l.]:[s.n.],2013:638-642.
[5]JING Li,PENG Zongren,YONG Feng,et al.Electric field calculation and grading ring optimization of composite insulator for 500 k V AC transmission lines[C]Solid Dielectrics(ICSD),2010 10th IEEE International Conference on.[S.l.]:[s.n.],2010:1-4.
[6]MIAO HX,QI BS,SHI Q.Electric field calculation of transmission line composite insulator and umbrella skirt optimization[C]//International Conference on Software Intelligence Technologies and Applications&International Conference on Frontiers of Internet of Things 2014.Hsinchu,Taiwan:IET The Institution of Engineering and Technology,2014,237~241.
[7]PHILLIPS A J,KUFFEL J,BAKER A,et al.Electric field on AC composite transmission line insulations[J].IEEE Transactions on Power Delivery,2008,23(2):823-830.
[8]M'HAMDI B,TEGUAR M,MEKHALDI A.Optimal Design of Corona Ring on HV Composite Insulator Using PSO Approach with Dynamic Population Size[C]//9th Conference of the French-Society-of-Electrostatics.Toulouse,FRANCE:French Soc Electrostat;Paul Sabatier Univ,Lab Plasma&Energy Convers;French Natl Ctr Sci Res,2014,1048-1057
[9]卢明,杨庆,阎东,等.复合绝缘子伞型结构对电场分布的影响[J].电瓷避雷器,2011,239(1):1-6.LU Ming,YANG Qing,YAN Dong,et al.The effect of the composite insulators sheds type structure on the electric field distributions[J].Insulators and Surge Arresters,2011,239(1):1-6.
[10]刘向实.污秽条件下复合绝缘子电场仿真研究[J].电瓷避雷器,2014,261(5):31-36.LIU Xiangshi.Study on electric field distribution of composite insulator under pollution conditions[J].Insulators and Surge Arresters,2014,261(5):31-36.
[11]雷成华.±500 k V线路避雷器用在直流线路防雷中的运行分析[J].电瓷避雷器,2016,271(3):70-74.LEI Chenghua.Operational analysis on±500 k V line arrester used in lighting protection of DC transmission line[J].Insulators and Surge Arresters,2016,271(3):70-74.
[12]彭向阳.广东线路避雷器防雷效果及运行分析[J].电瓷避雷器,2010,234(2):21-25,29.PENG Xiangyang.Analysis on lightning protection effects and operationof line arresters in Guangdong power grid[J].Insulators and Surge Arresters,2010,234(2):21-25,29.
[13]陈俊,刘守豹,许安,等.线路避雷器在复杂地形500k V线路防雷中的应用[J].电瓷避雷器,2013,253(3):123-127.CHEN Jun,LIU Shoubao,XU An,et al.The use of line arrester in lightning protection of 500 k V transmission line in complex terrain[J].Insulators and Surge Arresters,2013,253(3):123-127.
[14]葛栋,焦飞,张翠霞,等.输电线路避雷器的应用及其安装方案[J].华北电力技术,2009(8):38-41.GE Dong,JIAO Fei,ZHANG Cuixia,et al.Application and installation of transmission line surge arresters[J].North China Electric Power,2009(8):38-41.
[15]GAL S A,FAGARASAN T,OLTEAN M,et al.New line arresters aim to improve reliability of keyRomanian transmission line[J].Insulator News and Mar-ket Report(INMR),2006,14(2):44-49.
[16]许安,杨翔,贾文彬.220 k V带纯空气间隙线路避雷器的电场分析[J].电瓷避雷器,2016,270(2):100-105.XU An,YANG Xiang,JIA Wenbin.The electric field analysis of 220 k V line arrester with pure air gap[J].Insulators and Surge Arresters,2016,270(2):100-105.
[17]熊泰昌.电力避雷器[M].北京:中国水利电力出版社,2013.