Low wind speed high power magnetic suspension vertical shaft wind turbine and control method thereof

Abstract

The invention relates to a low wind speed high power magnetic suspension vertical shaft wind turbine and a control method thereof, belonging to the field of wind power. The wind turbine comprises a permanent magnet direct-drive wind turbine, a magnetic suspension disc motor, a wind wheel, an air gap sensor, an upper end bearing, a lower end bearing, a shell, a tower, a converter system, a contactor and energy storage equipment and the like. The converter system includes machine-side converter, grid-side converter and suspension converter. When the wind speed is less than the rated wind speed,the suspension converter performs suspension control to make the rotor of the wind turbine set rise to and maintain the suspension balance point. The machine-side converter performs MPPT control on the permanent magnet direct drive generator, and the grid-side converter realizes grid connection. When the wind speed is higher than the rated wind speed and lower than the cut-out wind speed, the suspension converter implements rotational damping control, and the machine-side converter implements constant power control for the permanent magnet direct drive generator. The invention has ingenious structure, simple and convenient control and high wind energy utilization rate, can realize low wind speed starting and high power output, and is especially suitable for weak wind type wind farms.

Description

technical field [0001] The invention relates to a wind power generator set, in particular to a low wind speed high power magnetic levitation vertical axis wind power 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 wind turbine...

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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