750 kV输电线路转角塔周围作业人员电场仿真
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摘要
为了保证作业人员带电作业时的安全,需要研究作业人员进入作业区时,身体各部位所承受的电场强度。针对转角塔结构的特点,通过COMSOL有限元仿真软件建立750 kV转角塔模型,研究转角塔上单回输电线路、双回输电线路上以及作业人员在导线不同位置作业时场强的变化情况。研究发现:人体周围电场及表面场强随着作业人员在不同作业位置时改变,地面场强远小于高空中输电线路附近位置的电场强度;人体体表场强从头部、躯体到下身因作业位置的不同而不同,同一位置下,头部受场强的影响最为严重,其次为上躯体,然后为下躯体;人体越靠近输电线路,部位体表场强越大。
In order to ensure safety of operators in live working, it is required to study electric field intensity of body parts as they enter into the working zones. Aiming at features of the structure of corner tower, the COMSOL finite element simulation software was used to establish a 750 kV corner tower model for studying variation of electric field intensity of operators on the single-circuit transmission line, double-circuit transmission line and different positions of the wire. The study indicates that electric field around the body and surface electric field intensity change with working positions and ground electric field intensity is far less than electric field intensity of neighbouring position of the high-altitude transmission line. The body surface electric field intensity varies from the head to the body because of different working positions, and at the same position, the head is most severely affected by electric field intensity, then the upper body and afterwards the lower body. The body surface electric field intensity is larger as the human body is closer to the transmission line.
In order to ensure safety of operators in live working, it is required to study electric field intensity of body parts as they enter into the working zones. Aiming at features of the structure of corner tower, the COMSOL finite element simulation software was used to establish a 750 kV corner tower model for studying variation of electric field intensity of operators on the single-circuit transmission line, double-circuit transmission line and different positions of the wire. The study indicates that electric field around the body and surface electric field intensity change with working positions and ground electric field intensity is far less than electric field intensity of neighbouring position of the high-altitude transmission line. The body surface electric field intensity varies from the head to the body because of different working positions, and at the same position, the head is most severely affected by electric field intensity, then the upper body and afterwards the lower body. The body surface electric field intensity is larger as the human body is closer to the transmission line.
引文
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[13] 苏梓铭,彭勇,刘凯,等.1 000 kV与500 kV交流同塔四回线路带电作业电场防护仿真计算分析[J].中国电力,2014,47(2):78-83.SU Ziming,PENG Yong,LIU Kai,et al.1 000 kV and 500 kV AC four circuits on the same tower line electric protection simulation analysis[J].Electric Power,2014,47(2):78-83.
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[18] 欧小波,彭发东,庞小峰.同塔双回输电线路中感应电压和感应电流的仿真及试验研究[J].广东电力,2013,26(1):53-58.OU Xiaobo,PENG Fadong,PANG Xiaofeng.Simulation and test research on induced voltage and current of double-circuit transmission line[J].Guangdong Electric Power,2013,26(1):53-58.
[19] 刘洪正,刘凯,孟海磊,等.±660 kV直流同塔双回输电线路带电作业试验研究[J].高电压技术,2011,37(12):2997-3005.LIU Hongzheng,LIU Kai,MENG Hailei,et al.Experimental research of live working on ±660 kV double circuit DC transmission line on the same tower[J].High Voltage Engineering,2011,37(12):2997-3005.
[20] 李金亮,邹德华,刘夏清,等.500 kV/220 kV同塔四回混压输电线路检修作业安全防护研究[J].电力科学与技术学报,2016,31(2):134-140.LI Jinliang,ZOU Dehua,LIU Xiaqing,et al.Research on security protection of maintenance work on 500 kV/220 kV four-circuit mixed-voltage transmission lines on the same tower[J].Journal of Electric Power Science and Technology,2016,31(2):134-140.
[21] 方雅琪,彭勇,苏梓铭,等.特高压紧凑型线路带线作业人体表电场仿真计算[J].中国电力,2015,48(10):77-83.FANG Yaqi,PENG Yong,SU Ziming,et al.Computation of body surface electric field during live working on 1 000 kV AC compact transmission line[J].Electric Power,2015,48(10):77-83.
[2] 麻焕成,林晓焕,曹雯,等.750 kV交流输电线下人体的工频电场效应分析[J].电力建设,2016,37(1):50-55.MA Huancheng,LIN Xiaohuan,CAO Wen,et al.Power frequency electric field effect on human body in 750 kV AC transmission lines[J].Electric Power Construction,2016,37(1):50-55.
[3] 李毅,潘文霞,李威.超高压三相交流线路电晕电流的数值计算[J].广东电力,2018,31(8):134-138.LI Yi,PAN Wenxia,LI Wei.Numerical calculation for corona current of ultra-high voltage three-phase AC lines[J].Guangdong Electric Power,2018,31(8):134-138.
[4] 唐波,吴玮华,刘任,等.500 kV紧凑型同塔双回输电线路带电作业进入等电位方法[J].高压电器,2018,54(4):113-119.TANG Bo,WU Weihua,LIU Ren,et al.Entering the equipotential method for live working of 500 kV vompact double circuit transmission line[J].High Voltage Apparatus,2018,54(4):113-119.
[5] 刘夏清,邹德华,李稳,等.110 kV/220 kV同塔混压四回输电线路带电作业中人体体表场强仿真分析[J].电力科学与技术学报,2015,30(3):131-136.LIU Xiaqing,ZOU Dehua,LI Wen,et al.Simulation analysis of body surface electromagnetic field in live overhaul of 110 kV /220 kV four-parallel lines on same tower [J].Journal of Electric Power Science and Technology,2015,30(3):131-136.
[6] HUANG X L,HUANG L,ZHOU G,et al.Research on power frequency electromagnetic environment of UHV AC wires and related electrostatic induction effect[J].IEEE Transactions on Magnetics,2011,47(10):3516-3519.
[7] 杨雅倩,罗日成,吴东,等.750 kV同塔双回输电线路带电作业体表场强分析[J].电力科学与技术学报,2017,32(2):158-165.YANG Yaqian,LUO Richeng,WU Dong,et al.Analysis of body surface field strength for live working on 750 kV double-circuit transmission line[J].Journal of Electric Power Science and Technology,2017,32(2):158-165.
[8] 陈稼苗,丁玉剑,宋刚,等.500 kV同塔双回垂直排列紧凑型塔头空气间隙放电特性的实验研究[J].高电压技术,2014,40(10):3284-3289.CHEN Jiamiao,DING Yujian,SONG Gang,et al.Experimental study on the air gap discharge characters of 500 kV double-circuit vertically-arranged compact towers[J].High Voltage Engineering,2014,40(10):3284-3289.
[9] 郭琳霞,龚有军.考虑弧垂情况下交流输电线路的地面电场分布[J].南方能源建设,2018,5(1):103-106.GUO Linxia,GONG Youjun.Electric field distribution of AC transmission lines considering vertical sag [J].Southern Energy Construction,2018,5(1):103-106.
[10] 蒋伟,吴广宁,黄震.有限元法分析特高压直流线路对人体的影响[J].高电压技术,2008,34(9):1826-1830.JIANG Wei,WU Guangning,HUANG Zhen.Analysis of effects on human body of UHVDC transmission line based on FEM[J].High Voltage Engineering,2008,34(9):1826-1830.
[11] 王炳强,岳嵩,吴元香,等.高海拔地区220 kV输电线路带电作业安全距离技术研究[J].电力系统保护与控制,2017,45(24):158-162.WANG Bingqiang,YUE Song,WU Yuanxiang,et al.Research on security distance of live working on 220 kV transmission line at high altitudes[J].Power System Protection and Control,2017,45(24):158-162.
[12] ZIMING S,KAI L,TING L,et al.Research on security distance of live working on distribution line at high altitudes[C]//2017 1st International Conference on Electrical Materials & Power Equipment(ICMPE).Piscataway:IEEE Press,2017:686-690.
[13] 苏梓铭,彭勇,刘凯,等.1 000 kV与500 kV交流同塔四回线路带电作业电场防护仿真计算分析[J].中国电力,2014,47(2):78-83.SU Ziming,PENG Yong,LIU Kai,et al.1 000 kV and 500 kV AC four circuits on the same tower line electric protection simulation analysis[J].Electric Power,2014,47(2):78-83.
[15] 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.
[16] ESMERALDO P C,GABAGLA C P,ALEKSANDROV G N,et al.A proposed design for the new furnas 500 kV transmission lines the high surge impedance loading line[J].IEEE Transactions on Power Delivery,1999,14(1):278-286.
[17] 曾彦珺,王彤,李怡,等.基于有限元法的±1 000 kV同塔双回线路电磁环境仿真计算[J].电测与仪表,2017,54(17):18-24.ZENG Yanjun,WANG Tong,LI Yi,et al.Simulation calculation of electromagnetic environment of ±1 000 kV double circuit transmission line based on finite element method[J].Electrical Measurement & Instrumentation,2017,54(17):18-24.
[18] 欧小波,彭发东,庞小峰.同塔双回输电线路中感应电压和感应电流的仿真及试验研究[J].广东电力,2013,26(1):53-58.OU Xiaobo,PENG Fadong,PANG Xiaofeng.Simulation and test research on induced voltage and current of double-circuit transmission line[J].Guangdong Electric Power,2013,26(1):53-58.
[19] 刘洪正,刘凯,孟海磊,等.±660 kV直流同塔双回输电线路带电作业试验研究[J].高电压技术,2011,37(12):2997-3005.LIU Hongzheng,LIU Kai,MENG Hailei,et al.Experimental research of live working on ±660 kV double circuit DC transmission line on the same tower[J].High Voltage Engineering,2011,37(12):2997-3005.
[20] 李金亮,邹德华,刘夏清,等.500 kV/220 kV同塔四回混压输电线路检修作业安全防护研究[J].电力科学与技术学报,2016,31(2):134-140.LI Jinliang,ZOU Dehua,LIU Xiaqing,et al.Research on security protection of maintenance work on 500 kV/220 kV four-circuit mixed-voltage transmission lines on the same tower[J].Journal of Electric Power Science and Technology,2016,31(2):134-140.
[21] 方雅琪,彭勇,苏梓铭,等.特高压紧凑型线路带线作业人体表电场仿真计算[J].中国电力,2015,48(10):77-83.FANG Yaqi,PENG Yong,SU Ziming,et al.Computation of body surface electric field during live working on 1 000 kV AC compact transmission line[J].Electric Power,2015,48(10):77-83.