采用绝缘横担提高10 kV架空线路耐雷水平的研究
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摘要
针对山区10 kV配电线路绝缘导线易发生雷击断线事故的问题,分析典型10 kV绝缘导线的断线机理,计算线路雷击感应过电压,提出采用绝缘子与绝缘横担配合来提高线路绝缘水平的防雷措施。通过试验得出结论:线路绝缘横担的有效绝缘长度大于60 cm时,绝缘导线的雷电冲击绝缘水平可达到385 kV以上;当横担表面存在重度污秽且饱和湿润的条件下,60 cm长度绝缘横担的绝缘水平下降至224 kV,增加硅橡胶伞裙护套后其绝缘水平可提高至403 kV。基于上述结论,提出在绝缘横担表面增设多伞裙硅橡胶护套以提高线路的污闪冲击绝缘水平,满足重度污秽地区10 kV线路的防雷要求。
Aiming at the problem of lightning-caused breaking of insulated wires of 10 kV distribution lines in mountainous areas, the paper analyzes breaking mechanism of typical 10 kV insulated wires, calculates lightning inductive overvoltage and proposes lightning protection measures to improve insulation level of lines by using insulators and insulated crossarms. According to related tests, it draws conclusions that when effective insulated length of the insulated crossarm is greater than 60 cm, lightning shock insulation level of the insulated wire reaches over 385 kV, and as there is heavy dirty and saturated humidity on the surface of the crossarm, insulation level of 60 cm insulated crossarm has dropped to 224 kV, but it is able to raise insulation level to 403 kV by adding silicone rubber umbrella skirt sheath. On the basis of the above conclusions, the paper proposes to add silicone rubber umbrella skirt sheath to improve pollution flashover lightning insulation level of lines and satisfy lightning protection requirements of 10 kV lines in severely polluted areas.
Aiming at the problem of lightning-caused breaking of insulated wires of 10 kV distribution lines in mountainous areas, the paper analyzes breaking mechanism of typical 10 kV insulated wires, calculates lightning inductive overvoltage and proposes lightning protection measures to improve insulation level of lines by using insulators and insulated crossarms. According to related tests, it draws conclusions that when effective insulated length of the insulated crossarm is greater than 60 cm, lightning shock insulation level of the insulated wire reaches over 385 kV, and as there is heavy dirty and saturated humidity on the surface of the crossarm, insulation level of 60 cm insulated crossarm has dropped to 224 kV, but it is able to raise insulation level to 403 kV by adding silicone rubber umbrella skirt sheath. On the basis of the above conclusions, the paper proposes to add silicone rubber umbrella skirt sheath to improve pollution flashover lightning insulation level of lines and satisfy lightning protection requirements of 10 kV lines in severely polluted areas.
引文
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[14] 郑晖,廖华武,李既明,等.架空配电线路雷击分析与防治措施[J].广东电力,2013,26(1):89-92,113.ZHENG Hui,LIAO Huawu,LI Jiming,et al.Lightning stroke analysis and prevention measures for overhead distributing lines[J].Guangdong Electric Power,2013,26(1):89-92,113.
[15] 徐兴发,聂一雄,徐亮,等.配电网架空绝缘导线防雷措施综述[J].广东电力,2012,25(7):1-6,37.XU Xingfa,NIE Yixiong,XU Liang,et al.Review on lightning protection measures for overhead insulated wires of distribution networks[J].Guangdong Electric Power,2012,25(7):1-6,37.
[16] 彭向阳,王锐,周华敏,等.基于不平衡绝缘的同塔多回输电线路差异化防雷技术及应用[J].广东电力,2016,29(6):109-116.PENG Xiangyang,WANG Rui,ZHOU Huamin,et al.Differentiated lightning protection technology and its application based on unbalanced insulation for multi-circuit power transmission lines on the same tower[J].Guangdong Electric Power,2016,29(6):109-116.
[17] 陈伟明.10 kV架空绝缘导线雷击断线分析及预防[J].供用电,2005,22(5):48-50.CHEN Weiming.Analysis of the conductor broken of the 10 kV overhead insulated lines due to lightning stroke and its prevention measures[J].Distribution & Utilization,2005,22(5):48-50.
[18] 李金岗,吕玉坤.绝缘子的积污特性研究现状及展望[J].广东电力,2018,31(2):18-23.LI Jingang,Lü Yukun.Status quo and prospect of reasearch on contamination characteristics of insulators[J].Guangdong Electric Power,2018,31(2):18-23.
[2] 陈勇.山区10 kV架空配电线路防雷措施的研究与改进[D].北京:华北电力大学,2016.
[3] 康琛.山区输电线路避雷器加装方案研究[D].保定:华北电力大学,2013.
[4] 王茂成,吕永丽,邹洪英,等.10 kV绝缘导线雷击断线机理分析和防治措施[J].高电压技术,2007,33(1):102-105.WANG Maocheng,Lü Yongli,ZOU Hongying,et al.Analysis of lightning-caused break mechanism of 10 kV insulation-covered conductors and its countermeasures[J].High Voltage Engineering,2007,33(1):102-105.
[5] 倪挺然.台州地区10 kV架空绝缘导线防雷设备应用研究[D].北京:华北电力大学,2016.
[6] GU S,CHEN W,HE J,et al.Development of surge arresters with series gap against lightning breakage of covered conductors on distribution lines[J].IEEE Transactions on Power Delivery,2007,22(4):2191-2198.
[7] 高振宇,潘浩,周仿荣,等.云南电网输电线路雷击跳闸多维度分析[J].云南电力技术,2018,46(3):20-22.GAO Zhenyu,PAN Hao,ZHOU Fangrong,et al.Multi-dimensional analysis of lightning outage characteristics in Yunnan power grid[J].Yunnan Electric Power,2018,46(3):20-22.
[8] 戴波涛,方向,田维.10 kV配电线路绝缘横担防雷实践研究[J].湖南电力,2017,37(增刊2):102-105.DAI Botao,FANG Xiang,TIAN Wei.Research on lightning protection of 10 kV distribution line insulation[J].Hunan Electric Power,2017,37(S2):102-105.
[9] 胡毅,王力农,郑传广,等.10 kV线路防雷击及污闪的绝缘塔头和横担[J].高电压技术,2007(12):108-110,161.HU Yi,WANG Linong,ZHENG Chuanguang,et al.Insulated tower top and cross arm to prevent lightning and pollution flashover[J].High Voltage Engineering,2007(12):108-110,161.
[10] HE J,GU S,CHEN S,et al.Discussion on measures against lightning breakage of covered conductors on distribution lines[J].IEEE Transactions on Power Delivery,2008,23(2):693-702.
[11] 张维佳,高峰,陈小建.线路避雷器配置方式对山区110 kV输电线路防雷性能影响研究[J].智慧电力,2018,46(4):82-86.ZHANG Weijia,GAO Feng,CHEN Xiaojian.Study on the influence of line arrester configuration on lightning protection performance of 110 kV transmission line in mountain area[J].Smart Power,2018,46(4):82-86.
[12] 王敬春,罗军,吕诗月,等.降低配电线路雷击断线和跳闸率的防护措施[J].高电压技术,2009,35(12):2958-2962.WANG Jingchun,LUO Jun,Lü Shiyue,et al.Protections measures of reducing the lightning trip-out rate and lightning-caused breakage for distribution lines[J].High Voltage Engineering,2009,35(12):2958-2962.
[13] 韩晋平,王晓丰,马心良,等.10 kV架空绝缘导线雷电过电压与防雷综合措施研究[J].高电压技术,2008,34 (11):2395-2399.HAN Jinping,WANG Xiaofeng,MA Xinliang,et al.Research on comprehensive protections of 10 kV overhead insulated distribution lines from lightning[J].High Voltage Engineering,2008,34 (11):2395-2399.
[14] 郑晖,廖华武,李既明,等.架空配电线路雷击分析与防治措施[J].广东电力,2013,26(1):89-92,113.ZHENG Hui,LIAO Huawu,LI Jiming,et al.Lightning stroke analysis and prevention measures for overhead distributing lines[J].Guangdong Electric Power,2013,26(1):89-92,113.
[15] 徐兴发,聂一雄,徐亮,等.配电网架空绝缘导线防雷措施综述[J].广东电力,2012,25(7):1-6,37.XU Xingfa,NIE Yixiong,XU Liang,et al.Review on lightning protection measures for overhead insulated wires of distribution networks[J].Guangdong Electric Power,2012,25(7):1-6,37.
[16] 彭向阳,王锐,周华敏,等.基于不平衡绝缘的同塔多回输电线路差异化防雷技术及应用[J].广东电力,2016,29(6):109-116.PENG Xiangyang,WANG Rui,ZHOU Huamin,et al.Differentiated lightning protection technology and its application based on unbalanced insulation for multi-circuit power transmission lines on the same tower[J].Guangdong Electric Power,2016,29(6):109-116.
[17] 陈伟明.10 kV架空绝缘导线雷击断线分析及预防[J].供用电,2005,22(5):48-50.CHEN Weiming.Analysis of the conductor broken of the 10 kV overhead insulated lines due to lightning stroke and its prevention measures[J].Distribution & Utilization,2005,22(5):48-50.
[18] 李金岗,吕玉坤.绝缘子的积污特性研究现状及展望[J].广东电力,2018,31(2):18-23.LI Jingang,Lü Yukun.Status quo and prospect of reasearch on contamination characteristics of insulators[J].Guangdong Electric Power,2018,31(2):18-23.