Journal of the Korean Society of Manufacturing Process Engineers (한국기계가공학회지)

The Korean Society of Manufacturing Process Engineers (한국기계가공학회)
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Effect Analysis of Spacer Stiffness and Interval on Galloping of Power Transmission Lines

스페이서 강성과 간격이 송전선 갤러핑에 미치는 영향분석

  • 오윤지 (Graduate School of Mechanical Design Engineering, PKNU) ;
  • 손정현 (Department of Mechanical Design Engineering, PKNU)
  • Received : 2018.12.17
  • Accepted : 2019.01.01
  • Published : 2019.01.31
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Abstract

Due to icing and snow, power transmission lines have asymmetric cross sections, and their motion becomes unstable. At this time, the vibration caused by the wind is called galloping. If galloping is continuous, short circuits or ground faults may occur. It is possible to prevent galloping by installing spacers between transmission lines. In this study, the transmission line is modeled as a mass-spring-damper system by using RecurDyn. To analyze the dynamic behavior of the transmission line, the damping coefficient is derived from the free vibration test of the transmission line and Rayleigh damping theory. The drag and lift coefficient for modeling the wind load are calculated from the flow analysis by using ANSYS Fluent. Galloping simulations according to spacer stiffness and interval are carried out. It is found that when the stiffness is 100 N/m and the interval around the support is dense, the galloping phenomenon is reduced the most.

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References

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