Low-wind-speed dual-motor magnetic levitation vertical axis wind turbine generator and control method thereof

Abstract

The invention discloses a low-wind-speed dual-motor magnetic levitation vertical axis wind turbine generator and a control method thereof, and belongs to the field of wind power. The wind turbine generator comprises a permanent magnet direct driving type wind driven generator, a magnetic levitation disc type motor, a wind wheel, a propeller torque adjustment motor, a shell, a tower frame, a propeller torque current transformer and the like; the current transformer comprises a machine side current transformer, a net side current transformer, a levitation current transformer, a disc type motor rotor side current transformer and a propeller torque current transformer. When the wind speed is smaller than the rated wind speed, the levitation current transformer implements levitation control, arotating body of the wind turbine generator ascends to and is kept at the levitation balance point, the machine side current transformer implements MPPT control over the permanent magnet direct driving type wind driven generator, and the net side p current transformer achieves gridding. When the wind speed is larger than the rated wind speed and smaller than the cut-out wind speed, the levitationcurrent transformer implements rotary damping control, the propeller torque current transformer implements propeller torque control, and the machine side current transformer implements constant powercontrol. The wind turbine generator is ingenious in structure, easy and convenient to control, high in wind energy use rate, capable of achieving low-wind-speed starting and high-power output and is particularly suitable for a weak wind power plant

Description

technical field [0001] The invention relates to a wind power generating set, in particular to a low-wind speed dual-motor type magnetic levitation vertical axis wind generating set and a control method thereof, belonging to the field of wind power. Background technique [0002] At present, the mainstream products of high-power wind turbines are horizontal axis wind turbines. However, horizontal axis wind turbines have inherent defects such as the need to yaw against the wind, large start-up resistance torque (start-up wind speed 2.5-5m / s), complex and difficult control, inconvenient installation, and high cost, which affect their healthy development, especially for weak wind types. Low wind speed start-up requirements for wind farms. [0003] Because vertical axis wind turbines do not need yaw devices, they have the advantages of low wind speed at start-up and easy installation, etc., and have been applied in small and medium power wind turbines. The maglev vertical axis w...

AI Technical Summary

Problems solved by technology

[0004] However, almost all existing magnetic suspension vertical axis wind turbines use magnetic suspension bearings (including active and passive magnetic suspension bearings and hybrid magnetic suspension bearings, etc.) to achieve suspension. Small size and high cost, so there is an urgent need to develop high-power, low-wind-speed vertical-axis wind turbines that meet the development needs of weak-wind wind farms

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