基于子导线气动力参数的D形覆冰八分裂导线舞动研究
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摘要
通过风洞试验研究了D形覆冰八分裂导线的气动力特性和驰振稳定性。对D形覆冰单导线和八分裂导线进行了气动力系数测定试验,分析了风速和风攻角对覆冰导线气动力特性的影响以及八分裂导线整体与子导线驰振稳定性的关系,并对国内外类似试验结果进行了汇总和比较,最后通过分裂导线舞动非线性数值模拟仿真再现了Den Hartog和Nigol舞动现象。结果表明:风速对D形覆冰导线阻力系数和升力系数的影响不大;八分裂导线整体阻力系数小于单导线,整体扭转系数大于单导线且波动更加明显;覆冰表面粗糙度和覆冰形状对导线气动力有一定影响;分裂导线整体Den Hartog舞动存在由部分子导线的舞动激发产生的现象;Den Hartog和Nigol系数均小于零时竖向舞动幅值非常大。
.The aerodynamic characteristic and the stability of galloping of D-shaped iced eight-bundled conductors were studied by wind tunnel test. Aerodynamic coefficient test of D-shaped iced single conductor and eight-bundled conductors was carried out. The influence of wind speed and wind angle on the aerodynamic characteristics of iced conductor and the relationship between the stability of eight-bundled conductors the stability of sub-conductor of the ice-covered conductor and the relationship between the stability of the eight-split conductor and the stability of the sub-conductor were analyzed. And similar test results at home and abroad were summarized and compared. Finally Den Hartog and Nigol galloping were reproduced by nonlinear numerical simulation of galloping for bundled conductors. The results show that wind speed has little effect on drag coefficient and lift coefficient of D-shaped iced conductor. The overall drag coefficient of eight-bundled conductors is less than single conductor. The overall torsional coefficient of eight-bundled conductors is greater than single conductor, and its fluctuation is more pronounced. Icing surface roughness and icing shape have some effect on aerodynamic force of conductor. Den Hartog galloping of bundled conductors may caused by galloping of sub-conductor. Vertical galloping amplitude will be very large when Den Hartog and Nigol coefficients are both less than zero.
.The aerodynamic characteristic and the stability of galloping of D-shaped iced eight-bundled conductors were studied by wind tunnel test. Aerodynamic coefficient test of D-shaped iced single conductor and eight-bundled conductors was carried out. The influence of wind speed and wind angle on the aerodynamic characteristics of iced conductor and the relationship between the stability of eight-bundled conductors the stability of sub-conductor of the ice-covered conductor and the relationship between the stability of the eight-split conductor and the stability of the sub-conductor were analyzed. And similar test results at home and abroad were summarized and compared. Finally Den Hartog and Nigol galloping were reproduced by nonlinear numerical simulation of galloping for bundled conductors. The results show that wind speed has little effect on drag coefficient and lift coefficient of D-shaped iced conductor. The overall drag coefficient of eight-bundled conductors is less than single conductor. The overall torsional coefficient of eight-bundled conductors is greater than single conductor, and its fluctuation is more pronounced. Icing surface roughness and icing shape have some effect on aerodynamic force of conductor. Den Hartog galloping of bundled conductors may caused by galloping of sub-conductor. Vertical galloping amplitude will be very large when Den Hartog and Nigol coefficients are both less than zero.
引文
[1] Hu J, Yan B, Zhou S, et al. Numerical investigation on galloping of iced quad bundle conductors [J]. IEEE Transactions on Power Delivery, 2012, 27(2): 784-792.
[2] Keutgen R, Lilien J L. Benchmark cases for galloping with results obtained from wind tunnel facilities——validation of a finite element model [J]. IEEE Transactions on Power Delivery, 2000, 15(1): 367-374.
[3] Nigol O, Buchan P G. Conductor galloping part Ⅰ-Den Hartog mechanism [J]. IEEE Transactions on Power Apparatus and Systems, 1981, 100(2): 699-707.
[4] Shimizu M, Ishihara T, Phuch P V. A wind tunnel study on aerodynamic characteristics of ice accreted transmission lines [J]. Proc. of the 18th Symposium on Wind Engineering, Tokyo (Japan), 2004: 245-250.
[5] Chadha J, Jaster W. Influence of turbulence on the galloping instability of iced conductors [J]. IEEE Transactions on Power Apparatus and Systems, 1975, 94(5): 1489-1499.
[6] 林巍. 覆冰输电导线气动力特性风洞试验及数值模拟研究 [D]. 杭州: 浙江大学, 2012.
[7] 肖正直, 晏致涛, 李正良, 等. 八分裂输电导线结冰风洞及气动力特性试验 [J]. 电网技术, 2009, 33(5): 90-94.
[8] Desai Y M, Yu P, Shah A H, et al. Perturbation-based finite element analysis of transmission line galloping [J]. Journal of Sound & Vibration, 1996, 191(4):469-489.
[9] 刘小会, 严波, 张宏雁, 等. 分裂导线舞动非线性有限元分析方法[J]. 振动与冲击, 2010,29(6):129-133.
[10] Yu P, Popplewell N, Shah A H. Instability trends of inertially coupled galloping: Part II: Periodic vibrations[J]. Journal of sound and vibration, 1995,183(4):679-691.
[11] Yu P, Popplewell N, Shah A H. Instability trends of inertially coupled galloping: Part I: Initiation[J]. Journal of sound and vibration, 1995,183(4):663-678.
[12] 严波, 胡景, 周松, 等.覆冰四分裂导线舞动数值模拟及参数分析[J]. 振动工程学报, 2010, 23(3):310-316.
[13] 郭应龙,李国兴,尤传永. 输电线路舞动 [M]. 北京:中国电力出版社,2003.
[14] 王昕. 覆冰导线舞动风洞试验研究及输电塔线体系舞动模拟 [D]. 杭州:浙江大学,2011:19-37.
[15] Yang Lun, Lou Wenjuan, Pan Xiaotao. Nonlinear numerical analysis for galloping of iced transmission lines[J]. Journal of Shenzhen University Science and Engineering 2013, 30(5):495-503.
[2] Keutgen R, Lilien J L. Benchmark cases for galloping with results obtained from wind tunnel facilities——validation of a finite element model [J]. IEEE Transactions on Power Delivery, 2000, 15(1): 367-374.
[3] Nigol O, Buchan P G. Conductor galloping part Ⅰ-Den Hartog mechanism [J]. IEEE Transactions on Power Apparatus and Systems, 1981, 100(2): 699-707.
[4] Shimizu M, Ishihara T, Phuch P V. A wind tunnel study on aerodynamic characteristics of ice accreted transmission lines [J]. Proc. of the 18th Symposium on Wind Engineering, Tokyo (Japan), 2004: 245-250.
[5] Chadha J, Jaster W. Influence of turbulence on the galloping instability of iced conductors [J]. IEEE Transactions on Power Apparatus and Systems, 1975, 94(5): 1489-1499.
[6] 林巍. 覆冰输电导线气动力特性风洞试验及数值模拟研究 [D]. 杭州: 浙江大学, 2012.
[7] 肖正直, 晏致涛, 李正良, 等. 八分裂输电导线结冰风洞及气动力特性试验 [J]. 电网技术, 2009, 33(5): 90-94.
[8] Desai Y M, Yu P, Shah A H, et al. Perturbation-based finite element analysis of transmission line galloping [J]. Journal of Sound & Vibration, 1996, 191(4):469-489.
[9] 刘小会, 严波, 张宏雁, 等. 分裂导线舞动非线性有限元分析方法[J]. 振动与冲击, 2010,29(6):129-133.
[10] Yu P, Popplewell N, Shah A H. Instability trends of inertially coupled galloping: Part II: Periodic vibrations[J]. Journal of sound and vibration, 1995,183(4):679-691.
[11] Yu P, Popplewell N, Shah A H. Instability trends of inertially coupled galloping: Part I: Initiation[J]. Journal of sound and vibration, 1995,183(4):663-678.
[12] 严波, 胡景, 周松, 等.覆冰四分裂导线舞动数值模拟及参数分析[J]. 振动工程学报, 2010, 23(3):310-316.
[13] 郭应龙,李国兴,尤传永. 输电线路舞动 [M]. 北京:中国电力出版社,2003.
[14] 王昕. 覆冰导线舞动风洞试验研究及输电塔线体系舞动模拟 [D]. 杭州:浙江大学,2011:19-37.
[15] Yang Lun, Lou Wenjuan, Pan Xiaotao. Nonlinear numerical analysis for galloping of iced transmission lines[J]. Journal of Shenzhen University Science and Engineering 2013, 30(5):495-503.