李特,王尧平,李响,王振国,吴强,王羽
LI Te,WANG Yaoping,LI Xiang,WANG Zhenguo,WU Qiang,WANG Yu

• 1:国网浙江省电力有限公司电力科学研究院
• 2:武汉大学电气与自动化学院
• 3:国网浙江省电力有限公司

摘要(Abstract)：

为研究直流线路绝缘子的自然积污特性，在±500 kV葛南线浙江嘉兴与湖州段设置测点进行自然积污试验。测试得到了绝缘子的等值盐密与等值灰密，研究了电场与伞形对绝缘子积污特性的影响，结果表明：钟罩型绝缘子积污比双伞形严重，钟罩型盐密、灰密平均为双伞形的1.73、1.54倍，灰盐比钟罩型略大，双伞形积污不均匀度显著小于钟罩型。提出了一种考虑积污不均匀度与灰密的绝缘子爬距有效利用系数计算方法，计算了不同污区等级下XZWP-160绝缘子的爬距有效利用系数。研究结果可为预防线路污闪事故提供有益参考。
To study the natural contamination characteristics of insulators on DC lines, measurement points are set between sections Jiaxing and Huzhou of ±500 kV Gezhouba-Nanqiao HVDC transmission lines to carry out natural contamination tests. The equivalent salt deposit density(ESDD) and non-soluble deposit density(NSDD) of insulators are obtained through tests. Also, the effect of electric field and shed shapes on the contamination characteristics of insulators is studied. The results show that the bell-shaped insulators are more susceptible to contamination in contrast to double-shed ones; the ESDD and NSDD of a bell-shaped insulator are 1.73 and 1.54 times respectively as much as those of the double-shed one; the NSDD/ESDD ratio of a double-shed insulator is slightly smaller than that of a bell-shaped one, and the contamination unevenness of a double-shed insulator is far smaller than that of the latter. Finally, a method for calculating the effective utilization coefficient of insulator creepage distance considering contamination unevenness and NSDD is proposed, and the effective utilization coefficients of the creepage distances of XZWP-160 insulators under different contamination levels are calculated. The research results can be a beneficial reference for line flashover prevention.

关键词(KeyWords)： 自然积污;直流输电;带电系数;灰盐比;积污不均匀度;爬距有效利用系数
natural contamination;DC transmission;energy coefficient;NSDD/ESDD ratio;contamination unevenness;effective utilization coefficient of creepage distance

Abstract:

Keywords:

基金项目(Foundation): 国网浙江省电力有限公司科技项目（B311DS221005）

作者(Author): 李特,王尧平,李响,王振国,吴强,王羽
LI Te,WANG Yaoping,LI Xiang,WANG Zhenguo,WU Qiang,WANG Yu

参考文献(References)：

• [1]沈青，李晓明，何照胜，等.基于可变电压的输电线路污闪自动防御方法[J].高电压技术，2015,41(4):1349-1356.SHEN Qing,LI Xiaoming,HE Zhaosheng,et al.Pollution flashover automatic defense methods of transmission lines based on variable voltage[J].High Voltage Engineering,2015,41(4):1349-1356.
• [2]王少华，胡文堂，龚坚刚，等.浙江电网架空输电线路绝缘子串的自然积污特性[J].高电压技术，2014,40(4):1002-1009.WANG Shaohua,HU Wentang,GONG Jiangang,et al.Natural pollution accumulation characteristics of overhead transmission line insulator strings of Zhejiang electric power grid[J].High Voltage Engineering,2014,40(4):1002-1009.
• [3]马欢，郭裕钧，张血琴，等.基于高光谱技术的绝缘子污秽含水量检测[J].高电压技术，2020,46(4):1396-1404.MA Huan,GUO Yujun,ZHANG Xueqin,et al.Moisture content detection of insulator contamination based on hyperspectral technology[J]. High Voltage Engineering,2020,46(4):1396-1404.
• [4]胡文堂，王少华，姜文东，等.基于污闪电压的自然积污绝缘子外绝缘状态评价[J].浙江电力，2016,35(3):1-3.HU Wentang,WANG Shaohua,JIANG Wendong,et al.External insulation condition evaluation of naturally polluted insulators based on pollution flashover voltage[J].Zhejiang Electric Power,2016,35(3):1-3.
• [5]卢明，刘泽辉，向玲，等.不同电压等级下绝缘子积污特性研究[J].电瓷避雷器，2020(1):186-191.LU Ming,LIU Zehui,XIANG Ling,et al.Study on contamination depositing characteristics of insulators under different voltage degrees[J].Insulators and Surge Arresters,2020(1):186-191.
• [6]高思明，周志成，王黎明，等.无降雨影响的绝缘子自然积污研究[J].电瓷避雷器，2019(5):245-251.GAO Siming,ZHOU Zhicheng,WANG Liming,et al.Study on natural contamination of insulators without effect of rainfall[J]. Insulators and Surge Arresters,2019(5):245-251.
• [7]律方成，秦春旭，郭文义，等.高海拔地区±800 kV特高压直流输电系统绝缘子带电自然积污特性[J].高电压技术，2013,39(3):513-519.LüFangcheng,QIN Chunxu,GUO Wenyi,et al.Natural contamination deposited characteristics of±800 kV UHV DC insulators at high altitudes[J].High Voltage Engineering,2013,39(3):513-519.
• [8]江渺，姜昀芃，卢明，等.复合绝缘子表面自然积污颗粒的粒径分布规律及机理研究[J].高压电器，2021,57(12):17-24.JIANG Miao,JIANG Yunpeng,LU Ming,et al.Study on particle size distribution and mechanism of natural contaminated particles on the surface of composite insulator[J].High Voltage Apparatus,2021,57(12):17-24.
• [9]师伟，卢思翰，张皓，等.不同外绝缘材料避雷器表面自然积污规律研究[J].山东电力技术，2022,49(8):35-41.SHI Wei,LU Sihan,ZHANG Hao,et al. Study on the natural pollution characteristics of arrester surface with different external insulation material[J]. Shandong Electric Power,2022,49(8):35-41.
• [10]田双，宋光辉，李文静，等.超疏水绝缘涂层在直流电场下的积污特性和闪络特性研究[J].山东电力技术，2021,48(6):35-38.TIAN Shuang,SONG Guanghui,LI Wenjing,et al.Study on fouling and flashover characteristics of superhydrophobic insulation coating under DC electric field[J].Shandong Electric Power,2021,48(6):35-38.
• [11]范超，张血琴，郭裕钧，等.绝缘材料表面污秽颗粒积聚规律研究[J].高压电器，2022,58(11):212-220.FAN Chao,ZHANG Xueqin,GUO Yujun,et al.Study on accumulation of contamination particles on surface of insulating materials[J]. High Voltage Apparatus,2022,58(11):212-220.
• [12]卢明，李瑶琴，李黎，等.哈郑特高压直流负极线路上U70BL型绝缘子自然积污规律[J].高电压技术，2016,42(2):557-563.LU Ming,LI Yaoqin,LI Li,et al.Natural contamination deposit law of U70BL type insulators of hami-Zhengzhou UHVDC negative line[J]. High Voltage Engineering,2016,42(2):557-563.
• [13]孙保强，王黎明，关志成，等.电压种类及极性对绝缘子积污的影响[J].高电压技术，2013,39(12):3101-3108.SUN Baoqiang,WANG Liming,GUAN Zhicheng,et al.Influence of voltage types and polarity on contamination of insulators[J]. High Voltage Engineering,2013,39(12):3101-3108.
• [14]高海峰，樊灵孟，李庆峰，等.±500 kV高肇直流线路绝缘子积污特性对比分析[J].高电压技术，2010,36(3):672-677.GAO Haifeng,FAN Lingmeng,LI Qingfeng,et al.Comparative analysis on pollution deposited performances of insulators on the±500 kV Gao-Zhao DC transmission line[J].High Voltage Engineering,2010,36(3):672-677.
• [15]律方成，黄华，刘云鹏，等.风洞模拟自然横风条件下绝缘子带电积污特性[J].高电压技术，2014,40(5):1281-1289.LYU Fangcheng,HUANG Hua,LIU Yunpeng,et al.Contamination depositing characteristics of insulators under natural crosswind conditions with wind tunnel simulation[J].High Voltage Engineering,2014,40(5):1281-1289.
• [16]肖嵘.华东电网输电线路绝缘子饱和污秽（盐密）特性及外绝缘配置方法的研究[D].上海：上海交通大学，2009.XIAO Rong.Study on East China grid transmission line insulator saturated contamination(salt density)the characteristic and outside insulates configuration method[D].Shanghai:Shanghai Jiao Tong University,2009.
• [17]李清，胡文，李黎，等.绝缘子自然积污饱和趋势及气象因素影响分析[J].高电压技术，2014,40(11):3336-3342.LI Qing,HU Wen,LI Li,et al. Analysis of natural contamination saturation tendency of insulators and influence of meteorological factors[J]. High Voltage Engineering,2014,40(11):3336-3342.
• [18]钱之银，肖嵘，吴光亚.华东地区500 kV线路绝缘子的爬距有效利用系数[J].电网技术，2007,31(18):32-36.QIAN Zhiyin,XIAO Rong,WU Guangya. Research on creepage distance utilization coefficients of insulators for500 kV transmission lines in East China area[J]. Power System Technology,2007,31(18):32-36.
• [19]李特，袁伟，陈乔，等.交流输电线路复合化外绝缘爬距有效利用系数研究[J].浙江电力，2017,36(4):18-21.LI Te,YUAN Wei,CHEN Qiao,et al.Research on effective utilization coefficient for creepage distance of external composite insulation of AC transmission lines[J].Zhejiang Electric Power,2017,36(4):18-21.