Interference Effect and Drag Coefficients of Multi-bundled Conductors under Skewed Azimuths

Shen Guohui, Bao Yunan, Qian Cheng, Guo Yong, Song Gang


Wind tunnel testing methods were employed to study the interference effect and drag coefficients of multi-bundled conductors under various azimuths. Drag coefficients of isolated conductor and circular cylinder with the same diameter were compared under various wind velocities and turbulence intensities. The drag coefficients of sub-conductor and total drag coefficients of multi-bundled conductor were obtained and their results are compared with those obtained from Codes and other researchers. The results show that the drag coefficient of the isolated conductor is 13% less than that of the circular cylinder under high velocity, indicating that the twisted shape can reduce the drag coefficient of the circular cylinder. When two sub-conductors are in front-back arrangement, the drag coefficient of the back sub-conductor decreases significantly, and the less distance between them, the more the drag coefficient decreases. The total drag coefficient of multi-bundled conductors is small under certain azimuth when the significant interference effect is considered. The enveloped drag coefficients of multi-bundled conductors with 23.94 mm in diameter and 400 mm in distance are recommended as 1.02, 1.00, 0.97 and 0.93 for isolated conductor, two-bundled conductor, four-bundled conductor, six-bundled conductor and eight-bundled conductor, respectively.



Keywords: multi-bundled conductors, drag coefficient, wind tunnel test, sub-conductor, wind azimuth

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LI M Z,ZHU H L,LI H L,et al. Wind tunnel test of drag reduced overhead conductor [J]. Electric Wire and Cable,2017(5):9—12. (In Chinese)

DANG P,WUXM,LIU B,et al. Wind tunnel test on drag coefficient of new type concentric -lay -stranded conductors[J]. Electric Wire and Cable,2014(4):30—33.(In Chinese)

YAN Z T,WANG L Z,LIU J,et al. Effects of surface roughness of conductors on their wind loads and vortex-induced vibration[J]. Journal of Vibration and Shock,2018,37 (3):146—151. (In Chinese)

LOU W J,LI T H,L Z B,et al. Wind tunnel test on aerodynamic coefficients of multi-bundled sub-conductors[J]. ActaAerodynamica Sinica,2015,33(6):787—792.(In Chinese)

XIE Q,XIE C,GUAN Z. Wind tunnel test on the interference effect on wind load of UHV 8 -bundled conductors [J]. High Voltage Engineering,2011,37(9):2126—2132.(In Chinese)

ZUO T H,NIU H W,MIN X,et al. Research on interference effects of wind load on bundle conductors [J]. Journal of Experiments in Fluid Mechanics,2015,29(2):37—42.(In Chinese)

NIU H W,HONG F,OUYANGKJ,et al. Analysis on downburst induced response of guyed portal tower [J]. Journal of Hunan University(Natural Science),2018,45(3):72—81.(In Chinese)

CAI M Q,YAN B,LIU X H,et al. Analysis on drag coefficients of bundled conductors under wind load [J]. Journal of Chongqing University,2013,36(1):110—114.(In Chinese)

WANG S L,LIANG S G,ZOU L H,et al. Study on drag coefficients of conductors based on wind tunnel tests of rigid sectional model [J]. Journal of Hunan University(Natural Sciences),2016,43(3):32—40.(In Chinese)

XIE Q,SUN Q G,GUAN Z. Wind tunnel test on global drag coefficients of multi -bundled conductors [J]. Power System Technology,2013,37(4):1106—1112.(In Chinese)

SUN Q G,XIE Q. Wind tunnel test on shielding effect of serial 2-bundled conductors [J]. Electric Power Construction,2013,34 (10):6—11.(In Chinese)

WARDLAW R L,COOPERKR,KORG,et al. Wind tunnel and analytical investigations into the aero elastic behavior of bundled conductor [J]. IEEE Transactions on Power Apparatus and Systems,1975,94(2):642—654.

SHAN L,JENKE L M,CANNON D D. Field determination of conductor drag coefficients [J]. Journal of Wind Engineering and Industrial Aerodynamics,1992,41(1/3):835—846.

PAN G,WANG D W,LI S L,et al. Transiting test method for galloping of iced conductor using wind generated by a moving vehicle[J]. Wind and Structures,2019,28(3):155—170.

GB 50545—2010 Code for design of 110 kV 750 kV overhead transmission line[S]. Beijing:China Planning Press,2010:31—34.(In Chinese)


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