Ultra-high wind turbine is a key wind power equipment for efficient utilization of wind energy in central and eastern China.In 2020,the novel electro-hydraulic lifting technology for wind turbine tower installation was successfully applied to the installation of ultra-high wind turbines with a hub center height of 170 m for the first time.The electro-hydraulic lifting system installed on the tower with low lifting point,high center of gravity and heavy loads consists of lifting subsystem and guiding subsystem.The guide subsystem is suitable for the working condition that the vertical distance between the upper and lower lifting points is large at the initial stage of lifting.Setting the guide mechanism at the upper and lower lifting points can generate a larger stable moment and overcome the overturning moment caused by the constant load.The lifting subsystem is suitable for the working condition that the vertical distance between the upper and lower lifting points becomes shorter at the later lifting stage.Through the bearing differentiation of the lifting subsystem,the overturning moment caused by unsteady loads such as pulsating wind is overcome.Through the vertical combination regulation of these two subsystems,the lifting attitude of wind turbine can be effectively controlled,so that the electro-hydraulic lifting system has a higher anti-overturning ability,which ensures the safety of construction operation and provides technical support for the application of electro-hydraulic lifting technology in the installation of ultra-high wind turbine.
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