康丽莉,陈科技,韩颂雨,姜瑜君
KANG Lili,CHEN Keji,HAN Songyu,JIANG Yujun

• 1:浙江省气象科学研究所
• 2:国网浙江省电力有限公司经济技术研究院
• 3:浙江省气象信息网络中心

摘要(Abstract)：

分析了某500 kV输电线路风偏和倒塔两次事故的气象成因，利用自动气象站的观测风速，结合基于雷达反演的三维风场，获得线路事故区域的风速分布特征：两次事故周边自动气象站观测的最大风速和极大风速偏小；雷达反演的三维风场对事故出现地点和时间均有较好的指示，导致输电线路倒塔的强对流天气与导致风偏的强对流天气相比，具有更高的回波高度、更强的上升气流，其反射率因子核心高度在6 min内下降了3.5 km以上，造成更大的地面破坏，但其局地性强，影响范围较小。分析结果表明：目前的线路设计风速在导致风偏的强对流天气下是偏安全的，但也要尽量避开可使风速放大的不利地形；对于可导致输电线路倒塔的微下击暴流，建议以“防串倒”为主要思路；在强对流天气影响下，观测风速计算的阵风系数明显大于相关规范中的取值。
The meteorological causes of wind deflection and tower collapse of a 500 kV transmission lines are analyzed. The wind speed distribution characteristics in the fault area of the line are obtained by using the observed wind speed of an automatic weather station and the three-dimensional wind field based on radar inversion. The results show that the maximum wind speed and the extreme wind speed observed by automatic weather stations around the two accidents are small. The three-dimensional wind field of radar inversion better indicates the fault's location and time. Compared with strong convective weather which can cause the wind deflection, the strong convective weather which can cause the tower collapse has a higher echo height and stronger updraft. The core height of its reflectivity factor drops more than 3.5 km within 6 minutes, causing greater ground damage, but its locality is strong and the influence range is small. The results show that the current design wind speed of the transmission line is safe under the strong convective weather that causes wind deflection, but adverse terrains that can accelerate the wind speed must be avoided. It is suggested to take “cascaded collapse prevention” as the main idea for the microburst which can cause the tower collapse. In addition, under the influence of strong convective weather, the gust coefficient calculated by the observed wind speed is significantly larger than the value in the relevant specifications.

关键词(KeyWords)： 强对流;500 kV输电线路;三维风场;风偏;倒塔
strong convection;500 kV transmission line;three-dimensional wind field;wind deflection;tower collapse

Abstract:

Keywords:

基金项目(Foundation): 国网浙江省电力有限公司科技项目（B311JY21000M）

作者(Author): 康丽莉,陈科技,韩颂雨,姜瑜君
KANG Lili,CHEN Keji,HAN Songyu,JIANG Yujun

DOI: 10.19585/j.zjdl.202303010

参考文献(References)：

• [1]周象贤，刘黎，王少华，等.浙江电网自然灾害特征、趋势与预测技术概况[J].浙江电力，2021,40(5):20-29.ZHOU Xiangxian,LIU Li,WANG Shaohua,et al. An overview on characteristics,tendency and prediction technology of natural disasters in Zhejiang power grid[J].Zhejiang Electric Power,2021,40(5):20-29.
• [2]王振国，刘黎，周啸宇，等.一起下击暴流导致500 kV输电线路倒塔事故原因分析[J].浙江电力，2021,40(11):16-22.WANG Zhenguo,LIU Li,ZHOU Xiaoyu,et al. Cause analysis of a 500 kV transmission line tower collapse icurred by downburst[J].Zhejiang Electric Power,2021,40(11):16-22.
• [3]李国翠，刘黎平，张秉祥，等.基于雷达三维组网数据的对流性地面大风自动识别[J].气象学报，2013,71(6):1160-1171.LI Guocui,LIU Liping,ZHANG Bingxiang,et al. Automatic identification of convective ground gale based on radar three-dimensional networking data[J].Acta Meteorologica Sinica,2013,71(6):1160-1171.
• [4]俞小鼎，周小刚，王秀明.雷暴与强对流临近天气预报技术进展[J].气象学报，2012,70(3):311-337.YU Xiaoding,ZHOU Xiaogang,WANG Xiuming.The advances in the nowcasting techniques on thunderstorms and severe convection[J].Acta Meteorologica Sinica,2012,70(3):311-337.
• [5]熊小伏，王伟，王建，等.基于天气雷达数据的强对流天气下输电线风偏放电预警方法[J].电力自动化设备，2018,38(4):36-43.XIONG Xiaofu,WANG Wei,WANG Jian,et al. Early warning method for wind swing discharging of transmission lines under severe convective weather based on weather radar data[J].Electric Power Automation Equipment,2018,38(4):36-43.
• [6]金龙，赵坤，谢利平，等.一次弓形回波结构和演变机制的观测分析[J].气象科学，2013,33(6):591-601.JIN Long,ZHAO Kun,XIE Liping,et al.Radar observation analysis on structure and evolution mechanism of a bow echo[J]. Journal of the Meteorological Sciences,2013,33(6):591-601.
• [7]王俊，龚佃利，刁秀广，等.一次弓状回波、强对流风暴及合并过程研究Ⅰ：以单多普勒雷达资料为主的综合分析[J].高原气象，2011,30(4):1067-1077.WANG Jun,GONG Dianli,DIAO Xiuguang,et al.Case study of bow echo,severe convective storm and merger processⅠ：taking single Doppler radar data as a case[J].Plateau Meteorology,2011,30(4):1067-1077.
• [8]王俊，盛日锋，陈西利.一次弓状回波、强对流风暴及合并过程研究Ⅱ：双多普勒雷达反演三维风场分析[J].高原气象，2011,30(4):1078-1086.WANG Jun,SHENG Rifeng,CHEN Xili. Case study of bow echo,severe convective storm and merger processⅡ：analysis on three-dimensional wind field retrieved by dual Doppler radar[J]. Plateau Meteorology,2011,30(4):1078-1086.
• [9]韩颂雨，罗昌荣，魏鸣，等.三雷达、双雷达反演降雹超级单体风暴三维风场结构特征研究[J].气象学报，2017,75(5):757-770.HAN Songyu,LUO Changrong,WEI Ming,et al. Research on three-dimensional wind field structure characteristic of hail supercell storm by dual-and triple-Doppler radar retrieval[J].Acta Meteorologica Sinica,2017,75(5):757-770.
• [10]罗昌荣，池艳珍，周海光.双雷达反演台风外围强带状回波风场结构特征研究[J].大气科学，2012,36(2):247-258.LUO Changrong,CHI Yanzhen,ZHOU Haiguang.Characteristics of 3-D wind structure of typhoon outer intensive banded echo using dual-Doppler weather radar data[J].Chinese Journal of Atmospheric Sciences,2012,36(2):247-258.
• [11]陈双，王迎春，张文龙，等.复杂地形下雷暴增强过程的个例研究[J].气象，2011,37(7):802-813.CHEN Shuang,WANG Yingchun,ZHANG Wenlong,et al.Intensifying mechanism of the convective storm moving from the mountain to the plain over Beijing area[J].Meteorological Monthly,2011,37(7):802-813.
• [12]国家能源局.架空输电线路荷载规范：DL/T 5551—2018[S].北京：中国计划出版社，2018.
• [13]周福，蒋璐璐，涂小萍，等.浙江省几种灾害性大风近地面阵风系数特征[J].应用气象学报，2017,28(1):119-128.ZHOU Fu,JIANG Lulu,TU Xiaoping,et al.Near-surface gust factor characteristics in several disastrous winds over Zhejiang Province[J]. Journal of Applied Meteorological Science,2017,28(1):119-128.
• [14]韩颂雨，郑栋，张义军，等.包含三次降雹的雹暴过程地闪活动特征分析[J].气象学报，2020,78(1):101-115.HAN Songyu,ZHENG Dong,ZHANG Yijun,et al.Characteristic analysis of cloud-to-ground lightning activity during hailstorm process with three hail falling events[J].Acta Meteorologica Sinica,2020,78(1):101-115.
• [15]王叶红，赵玉春，罗昌荣，等.双雷达风场反演拼图在登陆台风“莫兰蒂”（1614）强降水精细预报中的同化应用试验[J].气象学报，2019,77(4):617-644.WANG Yehong,ZHAO Yuchun,LUO Changrong,et al.Assimilation experiments for the application of dual-radar retrieval wind mosaics in detailed heavy precipitation forecast produced by landfall typhoon “Meranti”(1614)[J].Acta Meteorologica Sinica,2019,77(4):617-644.
• [16]陶岚，袁招洪，戴建华，等.一次夜间弓形回波特征分析[J].气象学报，2014,72(2):220-236.TAO Lan,YUAN Zhaohong,DAI Jianhua,et al.Analysis of the characteristics of a nocturnal bow echo[J].Acta Meteorologica Sinica,2014,72(2):220-236.
• [17]李彩玲，蔡康龙，黄先香，等.桂林一次强下击暴流成因分析[J].气象，2021,47(2):242-252.LI Cailing,CAI Kanglong,HUANG Xianxiang,et al.Cause analysis of a severe downburst in Guilin[J].Meteorological Monthly,2021,47(2):242-252.
• [18]徐海巍，楼文娟，李天昊，等.微地形下输电线路跳线的风偏分析[J].浙江大学学报（工学版），2017,51(2):264-272.XU Haiwei,LOU Wenjuan,LI Tianhao,et al. Windinduced swing investigation on transmission line jumper wire under hilly terrain[J].Journal of Zhejiang University(Engineering Science),2017,51(2):264-272.
• [19]郑永光，田付友，孟智勇，等.“东方之星”客轮翻沉事件周边区域风灾现场调查与多尺度特征分析[J].气象，2016,42(1):1-13.ZHENG Yongguang,TIAN Fuyou,MENG Zhiyong,et al. Survey and multi-scale characteristics of wind damage caused by convective storms in the surrounding area of the capsizing accident of cruise ship “dongfangzhixing”[J].Meteorological Monthly,2016,42(1):1-13.
• [20]杨风利，张宏杰，杨靖波，等.下击暴流作用下输电铁塔荷载取值及承载性能分析[J].中国电机工程学报，2014,34(24):4179-4186.YANG Fengli,ZHANG Hongjie,YANG Jingbo,et al.Bearing capacity analysis and load values of transmission towers under thunderstorm downburst[J].Proceedings of the CSEE,2014,34(24):4179-4186.
• [21]汪楚清，王辉.220 kV线路杆塔倒塌原因分析与预防措施[J].内蒙古电力技术，2022,40(5):59-63.WANG Chuqing,WANG Hui.Cause analysis and preventive measures for collapse of 220 kV transmission line tower[J]. Inner Mongolia Electric Power,2022,40(5):59-63.
• [22]张志强，黄增浩，汪大海，等.典型高压绝缘子串风荷载体型系数的试验研究[J].高压电器，2022,58(5):121-127.ZHANG Zhiqiang,HUANG Zenghao,WANG Dahai,et al.Test study on shape coefficient of typical high voltage insulator strings under wind load[J]. High Voltage Apparatus,2022,58(5):121-127.
• [23]赵亚宁，王欣伟.山西电网风区分布研究[J].山西电力，2021(1):17-20.ZHAO Yaning,WANG Xinwei. Research on the wind zone distribution of Shanxi power grid[J].Shanxi Electric Power,2021(1):17-20.
• [24]周海松，郝雨辰，王峰.新型输电线路飑线灾害预警方法研究[J].山西电力，2021(1):21-24.ZHOU Haisong,HAO Yuchen,WANG Feng. Research on a new early warning method for squall line disaster of transmission lines[J]. Shanxi Electric Power,2021(1):21-24.
• [25]安凯月，赵建坤，赵建利，等.内蒙古电网风区分布图绘制及应用原则[J].内蒙古电力技术，2021,39(1):26-30.AN Kaiyue,ZHAO Jiankun,ZHAO Jianli,et al.Drawing and application of distribution map of wind region in inner Mongolia power grid[J].Inner Mongolia Electric Power,2021,39(1):26-30.