Effect of Wake Flow Behind Wind Turbine on Aeolian Vibration of Overhead Transmission Lines
摘要
High-conductivity aluminium conductor aluminium alloy reinforced (ACAR) has been gradually popularized and applied in overhead transmission lines, and wire breakage of ACAR caused by aeolian vibration has attracted extensive attention. Wind farms are commonly located in areas with abundant wind resources. In this paper, a three-dimensional flow field model of a wind turbine is established, and two-dimensional circular cylinder flow calculations are used to analyze the influence of turbine wakes on the aeolian vibration of overhead transmission lines. The results show that the vibration amplitude and bending angle at a height of 70 m are significantly greater than those at 50 m and 40 m. To validate the simulation results, the on-site vibration measurements of ACAR in overhead transmission lines were also carried out. The experimental results demonstrate that the upper-phase conductors exhibit significantly greater vibration amplitudes and bending angles under wake flow influence, which aligns well with the simulation findings.