Vertical axis four-point pneumatic suspension type wind power generation system

Abstract

The invention discloses a vertical axis four-point pneumatic suspension type wind power generation system, which adopts four-point air floatation to support a fan rotating body and eliminate axis radial friction loss. The vertical axis four-point pneumatic suspension type wind power generation system comprises fan blades, a fan rotating body, a permanent magnet synchronous generator, a compressedair energy storage, a suspension damping device and a converter; the compressed air energy storage adopts reasonable control of electromagnetic clutches and two-way pneumatic valves, compresses and stores part of fan power exceeding rated power of the generator and stores energy for air floatation and damping control; and the suspension damping device adjusts the friction damping between the fan rotating body and a tower by reasonably controlling the openings and directions of three-way pneumatic valves to realize the pneumatic suspension and damping control of the fan rotating body. Based onthe compression power regulation of the multiple pneumatic valves and the electromagnetic clutches and the torque control of the machine-side converter, the coarse and fine coordinated regulation of the rotating speed of the fan is cooperatively realized, and the wind energy capture power is greatly increased.

Description

technical field [0001] The invention relates to a wind power generator set, in particular to a vertical axis four-point aerodynamic suspension wind power generation system, which belongs to the field of wind power. Background technique [0002] With the increasingly serious energy crisis and environmental pollution, wind power as a strictly non-polluting wind power has attracted worldwide attention, and wind power has been clearly promoted from a supplementary energy to an alternative energy strategic position, but in low wind speed areas (average wind speed below 5-6m / s) Accounting for more than 70% of the country's total area, it is an effective way to promote the development of low-wind-speed wind power by increasing the research on high-power low-wind-speed wind turbines. The vertical axis wind turbine does not need the yaw device necessary for the horizontal axis wind power generation system, and has the advantages of low start-up wind speed and easy installation. wind...

AI Technical Summary

Problems solved by technology

But at present, the general power is relatively small. Inner Mongolia Solide Wind Power Co., Ltd. and Guangzhou Yatu New Energy Co., Ltd. have developed MW-level vertical axis wind turbines, which use magnetic suspension bearings and multi-layer blade wind collection mechanisms, and the starting wind speed is reduced to 3-3.5 m / s, but there are problems such as wind energy capture control lag, large mechanical impact, and output power fluctuations. At the same time, the height difference of the multi-layer wind collection system leads to a large overturning moment of the fan, which can easily lead to changes in the radial suspension displacement of the fan rotor shaft and friction. Large loss and high power generation cost

Active electromagnetic levitation is used to realize the complete suspension of the blade air collection mechanism of the vertical axis wind power generation system, which can effectively reduce the axial radial friction loss of the fan rotating body, but the magnetic levitation device itself also has electromagnetic levitation power consumption, especially the levitation required to generate electromagnetic force Windings and permanent magnets directly increase the self-weight of the fan blade air collection system, resulting in large suspension power consumption; at the same time, the randomness and fluctuation of wind speed can easily lead to power fluctuations, affecting the safety and reliability of the power system

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