特高压八分裂输电线路次档距振动与防振研究
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摘要
基于典型特高压八分裂导线风洞试验获得的基本气动参数,对导线次档距振动现象进行了数值模拟,利用有限元方法分析了线路振动特性,讨论了风速对导线次档距振动的影响,研究了线路在不同间隔棒布置方式下次档距的振动情况。结果表明:风速在10m/s～16m/s下,档距为500m、600m、700m的输电线路的振动幅值均位于0m～2m范围内,随风速的变化呈近似线性变化;档距为500m的输电线路间隔棒等次档距布置时,子导线发生局部振动的频率为1.00Hz～1.18Hz;间隔棒非等次档距布置时,子导线发生局部振动的频率为0.91Hz～1.16Hz,间隔棒等次档距布置会改变导线的振动频率及形式;档距为500m的输电线路布置8根间隔棒时,子导线垂直方向振动频谱在1.10Hz附近均出现峰值;布置10根间隔棒时,子导线垂直方向振动频谱在1.19Hz出现峰值,且频谱峰值较小,增加间隔棒数量可以改变导线振动的频率以及频谱峰值。本文对特高压八分裂导线风振机理的研究及防振具有一定的参考意义。
Based on the basic aerodynamic parameters obtained by the wind tunnel tests of the typical UHV eight bundle conductor, this paper makes a numerical simulation of sub-span oscillation phenomenon of the conductor, analyzes the oscillation characteristics of the line by the finite element method, discusses the influence of different wind speeds on sub-span oscillation of the conductor, and studies the layout of the lines at different spacers. The results show that the vibration amplitude of the transmission line with the span of 500 m, 600 m and 700 m are in the 0 m ～2 m range under the wind speed of 10 m/s ～16 m/s, and the variation of the wind speed is approximately linear. For the transmission line with a span of 500 m, the frequencies of local vibration of the sub-conductor range in 1.00 Hz ～1.18 Hz when the spacer is equally arranged, and the local vibration frequencies of the sub-conductor are in 0.91 Hz ～1.16 Hz when the spacer is not equal. The frequency and form of the vibration of the conductor change with different arrangements of the spacer. When eight spacers are arranged in the span of 500 m, the vibration spectrum of the sub-conductor in the vertical direction peaks-near the 1.10 Hz, and when the ten spacers are arranged, the sub-conductor is vibrated in the vertical direction. The peak value of spectrum appears in 1.19 Hz and the peak value of spectrum is small. Increasing the number of spacers can change the frequency and peak value of vibration. The results provide a reference for the research of wind vibration mechanism and anti-oscillation of UHV eight bundled conductor.
Based on the basic aerodynamic parameters obtained by the wind tunnel tests of the typical UHV eight bundle conductor, this paper makes a numerical simulation of sub-span oscillation phenomenon of the conductor, analyzes the oscillation characteristics of the line by the finite element method, discusses the influence of different wind speeds on sub-span oscillation of the conductor, and studies the layout of the lines at different spacers. The results show that the vibration amplitude of the transmission line with the span of 500 m, 600 m and 700 m are in the 0 m ～2 m range under the wind speed of 10 m/s ～16 m/s, and the variation of the wind speed is approximately linear. For the transmission line with a span of 500 m, the frequencies of local vibration of the sub-conductor range in 1.00 Hz ～1.18 Hz when the spacer is equally arranged, and the local vibration frequencies of the sub-conductor are in 0.91 Hz ～1.16 Hz when the spacer is not equal. The frequency and form of the vibration of the conductor change with different arrangements of the spacer. When eight spacers are arranged in the span of 500 m, the vibration spectrum of the sub-conductor in the vertical direction peaks-near the 1.10 Hz, and when the ten spacers are arranged, the sub-conductor is vibrated in the vertical direction. The peak value of spectrum appears in 1.19 Hz and the peak value of spectrum is small. Increasing the number of spacers can change the frequency and peak value of vibration. The results provide a reference for the research of wind vibration mechanism and anti-oscillation of UHV eight bundled conductor.
引文
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[14]国家电力公司华东电力设计院.中华人民共和国电力行业标准110-550kV架空输电线路设计技术规程:DL/T 5092-1999[S].北京:中国电力出版社,1999.(State Power Company East China Electric Power Design Institute.Technical code for designing of People's Republic of China electric power industry standard110-550kV overhead transmission line:DL/T 5092-1999[S].Beijing:China Electric Power Press,1999(in Chinese)).
[15]陈元坤.分裂导线的微风振动与次档距振动的研究[D].武汉:华中科技大学,2011.(CHEN Yuankun.Study on aeolian vibration and subspan oscillation of bundle conductor[D].Wuhan:Huazhong University of Science&Technology,2011(in Chinese)).
[16]邵天晓.架空送电线路的电线力学计算[M].第2版.北京:中国电力出版社,2003.(SHAO Tianxiao.The mechanical calculation of wire mechanics for overhead transmission lines[M].2nd ed.Beijing:China Electric Power Press,2003(in Chinese)).
[2]蔡萌琦.分裂导线气动特性及次档距振动研究[D].重庆:重庆大学,2014.(CAI Mengqi.Investigation on aerodynamic characteristics and subspan galloping of bundle conductors[D].Chongqing:Chongqing University,2014(in Chinese)).
[3]严波,蔡萌琦,吕欣,等.四分裂导线尾流驰振数值模拟研究[J].振动与冲击,2015,34(1):182-189.(YAN Bo,CAI Mengqi,LüXin,et al.Numerical simulation on wake galloping of quad bundle conductor[J].Journal of vibration and shock,2015,34(1):182-189(in Chinese)).
[4]SOHO H K,LEE H K,CHU J H,et al.Field observation and analysis of wind-induced vibrations in four-bundled conductor transmission lines[J].Proceedings of the ISRA Seville,2003,3(2):109-114.
[5]李黎,王腾飞,陈元坤.分裂导线次档距振荡研究[J].振动与冲击,2014,33(17):62-67.(LI Li,WANG Tengfei,CHENYuankun.Subspan oscillation of bundle conductors[J].Journal of vibration and shock,2014,33(17):62-67(in Chinese)).
[6]卢明,葛亚峰,魏建林,等.真型试验线路风振的观测与分析[J].电力建设,2015,36(11):123-124.(LU Ming,GE Yafeng,WEI Jianlin,et al.Sub-span oscillation analysis and observation of true type test lines[J].Journal of electric power construction,2015,36(11):123-124(in Chinese)).
[7]DIANA G,BELLOLI M,GIAPPINO S,et al.A numerical approach to reproduce sub-span oscillations and comparison with experimental data[J].IEEE transactions on power delivery,2014,29(3):1311-1317.
[8]王昕,楼文娟,沈国辉,等.覆冰导线气动力特性风洞试验研究[J].空气动力学报,2011,29(5):573-579.(WANG Xin,LOU Wenjuan,SHEN Guohui,et al.A wind tunnel study on aerodynamic characteristics of iced conductor[J].Acta aerodynamica sinica,2011,29(5):573-579(in Chinese)).
[9]张宏雁,严波,周松,等.覆冰四分裂导线静态气动力特性试验[J].空气动力学学报,2011,29(2):150-154.(ZHANG Hongyan,YANBo,ZHOU Song,et al.Static test on aerodynamic characteristics of iced quad bundled conductors[J].Acta aerodynamica sinica,2011,29(2):150-154(in Chinese)).
[10]楼文娟,李天昊,吕中宾,等.多分裂子导线气动力系数风洞试验研究[J].空气动力学学报,2015,33(6):787-793.(LOU Wenjuan,LI Tianhao,LüZhongbin,et al.Wind tunnel test on aerodynamic coefficients of multi-bundled sub-conductors[J].Acta aerodynamica sinica,2015,33(6):787-793(in Chinese)).
[11]DIANA G,BELLOLI M,GIAPPINO S,et al.Wind tunnel tests on two cylinders to measure sub-span oscillation aerodynamic forces[J].IEEE transactions on power delivery,2014,29(3):1273-1283.
[12]严波,蔡萌琦,何小宝,等.特高压八分裂导线尾流驰振研究[J].空气动力学学报,2016,34(5):681-686.(YAN Bo,CAI Mengqi,HE Xiaobao,et al.The study of wake galloping about eight bundle conductor[J].Acta aerodynamica sinica,2016,34(5):681-686(in Chinese)).
[13]ZHOU L,YAN B,ZHANG L,et al.Study on galloping behavior of iced eight bundle conductor transmission lines[J].Journal of sound and vibration,2016,362:85-110.
[14]国家电力公司华东电力设计院.中华人民共和国电力行业标准110-550kV架空输电线路设计技术规程:DL/T 5092-1999[S].北京:中国电力出版社,1999.(State Power Company East China Electric Power Design Institute.Technical code for designing of People's Republic of China electric power industry standard110-550kV overhead transmission line:DL/T 5092-1999[S].Beijing:China Electric Power Press,1999(in Chinese)).
[15]陈元坤.分裂导线的微风振动与次档距振动的研究[D].武汉:华中科技大学,2011.(CHEN Yuankun.Study on aeolian vibration and subspan oscillation of bundle conductor[D].Wuhan:Huazhong University of Science&Technology,2011(in Chinese)).
[16]邵天晓.架空送电线路的电线力学计算[M].第2版.北京:中国电力出版社,2003.(SHAO Tianxiao.The mechanical calculation of wire mechanics for overhead transmission lines[M].2nd ed.Beijing:China Electric Power Press,2003(in Chinese)).