一起因雷击造成的220 kV架空地线断线故障分析
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摘要
对广东电网一起220 kV架空地线因雷击造成断线的罕见故障进行了原因分析,从故障时刻落雷数据、地线设计选型、断线部位的材料分析和断线机理的简化计算等方面综合诊断,得出结论:由于超强幅值雷电流产生的电弧烧蚀和局部热效应的共同作用,导致地线机械强度显著下降,在正常运行张力作用下发生整体拉断。针对该类问题,考虑大幅值雷电流出现概率、架空地线材质和结构参数等因素,在架空地线选型设计、日常运维和地线断线隐患排查等方面提出了相关建议。
This paper analyzes reasons for an unusual disconnection fault of 220 kV overhead ground wire of Guangdong power grid caused by lightning stroke. In terms of lightning data at the fault moment, type selection for ground wire design, material analysis of disconnection part, simplified calculation of disconnection mechanism, and so on, it makes comprehensive diagnosis and draws conclusions that combined action of arc ablation and local thermal effect produced by ultra strong amplitude lightning current has caused prominent decrease of mechanical strength of the ground wire and total breakage under normal running tension. Therefore, it considers factors such as probability of occurrence of large amplitude lightning current, materials of overhead ground wires and structural parameters, and so on, and proposes related suggestions for type selection of the ground wire, daily operation and maintenance, troubleshooting of hidden dangers of disconnection, and so on.
This paper analyzes reasons for an unusual disconnection fault of 220 kV overhead ground wire of Guangdong power grid caused by lightning stroke. In terms of lightning data at the fault moment, type selection for ground wire design, material analysis of disconnection part, simplified calculation of disconnection mechanism, and so on, it makes comprehensive diagnosis and draws conclusions that combined action of arc ablation and local thermal effect produced by ultra strong amplitude lightning current has caused prominent decrease of mechanical strength of the ground wire and total breakage under normal running tension. Therefore, it considers factors such as probability of occurrence of large amplitude lightning current, materials of overhead ground wires and structural parameters, and so on, and proposes related suggestions for type selection of the ground wire, daily operation and maintenance, troubleshooting of hidden dangers of disconnection, and so on.
引文
[1] 彭向阳,周华敏.广东电网防雷现状分析及建议[J].南方电网技术,2010,4(3):87-91.PENG Xiangyang,ZHOU Huamin.Analysis on the lightning protection status of Guangdong power grid and correlative advises[J].Southern Power System Technology,2010,4(3):87-91.
[2] 彭向阳,周华敏.线路雷击跳闸分析及策略[J].电力建设,2010,31(1):64-71.PENG Xiangyang,ZHOU Huamin.Analysis on lightning trip-out characters and strategy of overhead transmission line[J].Electric Power Construction,2010,31(1):64-71.
[3] 吕华忠.输电线路瓷绝缘子掉串原因分析及对策[J].江西电力,2001,25(2):19-20.
[4] 熊猛,罗翔.高压输电线路雷击故障分析[J].云南电力技术,2015,43(8):48-51.XIONG Meng,LUO Xiang.Reflection and exploration on lightning tripping for high-voltage transmission lines in Xishuangbanna Power Supply Bureau[J].Yunnan Electric Power,2015,43(8):48-51.
[5] 吴建军,李玉宝,段文运,等.500 kV线路架空避雷线雷击损伤后抢修维护方法[J].中国电力,2009,42(5):64-67.WU Jianjun,LI Yubao,DUAN Wenyun,et al.Maintenance method for earth wire of 500 kV power transmission line after heavy damage by lightning stroke[J].Electric Power,2009,42(5):64-67.
[6] 彭向阳,金亮,王锐,等.同塔四回输电线路雷击闪络位置分布特性[J].广东电力,2018,31(8):147-154.PENG Xiangyang,JIN Liang,WANG Rui,et al.Lightning strike flashover position distribution characteristic of quadruple circuit transmission lines on the same tower[J].Guangdong Electric Power,2018,31(8):147-154.
[7] 黄志都,邓雨荣,吴彪,等.110 kV绝缘杆塔输电线路雷电侵入波过电压研究[J].南方电网技术,2017,11(1):45-51.HUANG Zhidu,DENG Yurong,WU Biao,et al.Research on lighting intruding wave overvoltage of 110 kV insulated tower transmission line[J].Southern Power System Technology,2017,11(1):45-51.
[8] 植芝豹,曾广实.110 kV 柳太线雷击断线事故分析[J].电瓷避雷器,2001(2):37-41.
[9] 植芝豹.柳州电网防止架空地线雷击断线的措施[J].广西电力,2006(1):59-62.ZHI Zhibao.Breakage prevention of overhead ground wire by lightning strike in Liu_zhou electric power network[J].Guangxi Electric Power,2006,(1):59-62.
[10] 尹创荣,徐征.110 kV景沙甲乙线双地线断落原因分析及对策[J].广东电力,2015,28(1):72-75.YIN Chuangrong,XU Zheng.Analysis on reasons for fragmentation of double ground wires of 110 kV Jingsha AB line and countermeasures[J].Guangdong Electric Power,2015,28(1):72-75.
[11] 张阳,刘辰,胡全义,等.±500 kV直流输电线路雷电闪络风险等级评估及差异化防雷措施改进方案[J].内蒙古电力技术,2017,35(3):73-77,82.ZHANG Yang,LIU Chen,HU Quanyi,et al.Assessment of lightning flashover risk level of ±500 kV HVDC transmission line and improvement scheme of differentiated lightning protection measures[J].Inner Mongolia Electric Power,2017,35(3):73-77,82.
[12] 董爱华,王玉梅,朱登惠,等.郑州煤业集团矿山线雷击断线事故的分析与对策[J].工矿自动化,2009,9(9):116-119.DONG Aihua,WANG Yumei,ZHU Denghui,et al.Analysis of wire breakage accident by lightning stroke of mine line of Zhengzhou Mining Group and its countermeasures[J].Industry and Mine Automation,2009,9(9):116-119.
[13] 甘行军,谭进,张敬国,等.架空绝缘线路防雷击断线措施的分析[J].高电压技术,2008,34(3):625-627.
[14] 彭向阳,周华敏,谢耀恒.同塔多回输电线路几种防雷击跳闸措施的评估[J].南方电网技术,2012,6(3):28-32.PENG Xiangyang,ZHOU Huamin,XIE Yaoheng.The evaluation of several counter measures for lightning tripout of multi-circuit transmission lines at the same tower[J].Southern Power System Technology,2012,6(3):28-32.
[15] 刘宇,王斯斯.广州电网新一代雷电定位系统的建设与应用[J].广东电力,2017,30(12):136-141.LIU Yu,WANG Sisi.Construction and application of new generation lightning location system of Guangdong power grid[J].Guangdong Electric Power,2017,30(12):136-141.
[16] DL/T 5092—1999,110～500 kV架空送电线路设计技术规程[S].
[17] 马御棠,王磊,马仪,等.地线融冰绝缘架设对线路工频短路电流分流影响仿真[J].云南电力技术,2015,43(1):113-116.MA Yutang,WANG Lei,MA Yi,et al.Research on fault current distribution of insulated ground wire in transmission line[J].Yunnan Electric Power,2015,43(1):113-116.
[18] 杨帅,刘宇,倪孟华,等.基于电流流向判别的交流输电线路闪络塔定位方法[J].高电压技术,2014,40(3):885-890.YANG Shuai,LIU Yu,NI Menghua,et al.Method of locating flashover tower of AC transmission line based on current flow discrimination[J].High Voltage Engineering,2014,40(3):885-890.
[19] YB/T 179—2000,锌-5%铝-稀土合金镀层钢绞线[S].
[20] GB/T 20492—2006,锌-5%铝-混合稀土合金镀层钢丝、钢绞线[S].
[21] 吴海燕,李焕群.A3钢高温力学性能的试验研究[J].消防科学与技术,2008,27(9):648-651.WU Haiyan,LI Huanqun.Experimental research on mechanical behaviors of structural steel grades A3 at elevated temperatures[J].Fire Science and Technology,2008,27(9):648-651.
[22] 侯仁保,李如虎.雷击避雷线断线原因的探讨[J].华东电力,1985(9):18-20.
[2] 彭向阳,周华敏.线路雷击跳闸分析及策略[J].电力建设,2010,31(1):64-71.PENG Xiangyang,ZHOU Huamin.Analysis on lightning trip-out characters and strategy of overhead transmission line[J].Electric Power Construction,2010,31(1):64-71.
[3] 吕华忠.输电线路瓷绝缘子掉串原因分析及对策[J].江西电力,2001,25(2):19-20.
[4] 熊猛,罗翔.高压输电线路雷击故障分析[J].云南电力技术,2015,43(8):48-51.XIONG Meng,LUO Xiang.Reflection and exploration on lightning tripping for high-voltage transmission lines in Xishuangbanna Power Supply Bureau[J].Yunnan Electric Power,2015,43(8):48-51.
[5] 吴建军,李玉宝,段文运,等.500 kV线路架空避雷线雷击损伤后抢修维护方法[J].中国电力,2009,42(5):64-67.WU Jianjun,LI Yubao,DUAN Wenyun,et al.Maintenance method for earth wire of 500 kV power transmission line after heavy damage by lightning stroke[J].Electric Power,2009,42(5):64-67.
[6] 彭向阳,金亮,王锐,等.同塔四回输电线路雷击闪络位置分布特性[J].广东电力,2018,31(8):147-154.PENG Xiangyang,JIN Liang,WANG Rui,et al.Lightning strike flashover position distribution characteristic of quadruple circuit transmission lines on the same tower[J].Guangdong Electric Power,2018,31(8):147-154.
[7] 黄志都,邓雨荣,吴彪,等.110 kV绝缘杆塔输电线路雷电侵入波过电压研究[J].南方电网技术,2017,11(1):45-51.HUANG Zhidu,DENG Yurong,WU Biao,et al.Research on lighting intruding wave overvoltage of 110 kV insulated tower transmission line[J].Southern Power System Technology,2017,11(1):45-51.
[8] 植芝豹,曾广实.110 kV 柳太线雷击断线事故分析[J].电瓷避雷器,2001(2):37-41.
[9] 植芝豹.柳州电网防止架空地线雷击断线的措施[J].广西电力,2006(1):59-62.ZHI Zhibao.Breakage prevention of overhead ground wire by lightning strike in Liu_zhou electric power network[J].Guangxi Electric Power,2006,(1):59-62.
[10] 尹创荣,徐征.110 kV景沙甲乙线双地线断落原因分析及对策[J].广东电力,2015,28(1):72-75.YIN Chuangrong,XU Zheng.Analysis on reasons for fragmentation of double ground wires of 110 kV Jingsha AB line and countermeasures[J].Guangdong Electric Power,2015,28(1):72-75.
[11] 张阳,刘辰,胡全义,等.±500 kV直流输电线路雷电闪络风险等级评估及差异化防雷措施改进方案[J].内蒙古电力技术,2017,35(3):73-77,82.ZHANG Yang,LIU Chen,HU Quanyi,et al.Assessment of lightning flashover risk level of ±500 kV HVDC transmission line and improvement scheme of differentiated lightning protection measures[J].Inner Mongolia Electric Power,2017,35(3):73-77,82.
[12] 董爱华,王玉梅,朱登惠,等.郑州煤业集团矿山线雷击断线事故的分析与对策[J].工矿自动化,2009,9(9):116-119.DONG Aihua,WANG Yumei,ZHU Denghui,et al.Analysis of wire breakage accident by lightning stroke of mine line of Zhengzhou Mining Group and its countermeasures[J].Industry and Mine Automation,2009,9(9):116-119.
[13] 甘行军,谭进,张敬国,等.架空绝缘线路防雷击断线措施的分析[J].高电压技术,2008,34(3):625-627.
[14] 彭向阳,周华敏,谢耀恒.同塔多回输电线路几种防雷击跳闸措施的评估[J].南方电网技术,2012,6(3):28-32.PENG Xiangyang,ZHOU Huamin,XIE Yaoheng.The evaluation of several counter measures for lightning tripout of multi-circuit transmission lines at the same tower[J].Southern Power System Technology,2012,6(3):28-32.
[15] 刘宇,王斯斯.广州电网新一代雷电定位系统的建设与应用[J].广东电力,2017,30(12):136-141.LIU Yu,WANG Sisi.Construction and application of new generation lightning location system of Guangdong power grid[J].Guangdong Electric Power,2017,30(12):136-141.
[16] DL/T 5092—1999,110～500 kV架空送电线路设计技术规程[S].
[17] 马御棠,王磊,马仪,等.地线融冰绝缘架设对线路工频短路电流分流影响仿真[J].云南电力技术,2015,43(1):113-116.MA Yutang,WANG Lei,MA Yi,et al.Research on fault current distribution of insulated ground wire in transmission line[J].Yunnan Electric Power,2015,43(1):113-116.
[18] 杨帅,刘宇,倪孟华,等.基于电流流向判别的交流输电线路闪络塔定位方法[J].高电压技术,2014,40(3):885-890.YANG Shuai,LIU Yu,NI Menghua,et al.Method of locating flashover tower of AC transmission line based on current flow discrimination[J].High Voltage Engineering,2014,40(3):885-890.
[19] YB/T 179—2000,锌-5%铝-稀土合金镀层钢绞线[S].
[20] GB/T 20492—2006,锌-5%铝-混合稀土合金镀层钢丝、钢绞线[S].
[21] 吴海燕,李焕群.A3钢高温力学性能的试验研究[J].消防科学与技术,2008,27(9):648-651.WU Haiyan,LI Huanqun.Experimental research on mechanical behaviors of structural steel grades A3 at elevated temperatures[J].Fire Science and Technology,2008,27(9):648-651.
[22] 侯仁保,李如虎.雷击避雷线断线原因的探讨[J].华东电力,1985(9):18-20.