Compressed air energy storage type wind driven vertical axis air flotation power generation system

Abstract

The invention discloses a compressed air energy storage type wind driven vertical axis air flotation power generation system. Wind energy exceeding rated power is efficiently stored through compressedair energy storage. A wind turbine rotating body is supported through four-point air flotation, shaft radial friction loss is eliminated, and the wind energy capturing rate is improved. The compressed air energy storage type wind driven vertical axis air flotation power generation system comprises wind turbine blades, a wind turbine rotating body, a permanent magnet synchronous generator, a compressed air energy storage device, a flotation damping control device and a converter. The compressed air energy storage device adopts reasonable attraction engagement of electromagnetic clutches and reasonable connection of bidirectional pneumatic valves to adjust power of compressed air energy storage device. The flotation damping control device reasonably adjust the air pressure in expansion holes of pneumatic supports to change the friction torque between the wind turbine rotating body and a tower so as to ensure constant power control over the generator. Due to the change of wind speed andair pressure in a high pressure air storage tank, the compressed air energy storage type wind driven vertical axis air flotation power generation system has five working modes including air floatationstart, air floatation wind energy capturing, air flotation compression energy storage, damping power control and shutdown protection.

Description

technical field [0001] The invention relates to a wind power generation system, in particular to a wind power compressed air energy storage type vertical axis air flotation 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...

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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