Improved extra-large vertical-axis wind-driven turbine power generator system

Abstract

The invention discloses a technology for an extra-large vertical-axis wind-driven turbine power generation unit. The technology for the extra-large vertical-axis wind-driven turbine power generation unit has the advantages that a turbine is an extra-large unit with the power level higher than or equal to 10MW, double-blade and single-arm AerogeneratorX designs of a British Arup company are improved to obtain double-blade and double-arm triangular designs from the perspective of structural mechanics, and accordingly the shortcoming of low structural strength due to high shear stress of cantilever beams can be overcome; starting torque can be increased by the aid of the additional Savonius turbine, driving torque is stable owing to the additional Savonius turbine, and output power of the unit can be increased; a novel power generator and a novel motor converter technology are matched with each other, so that a large wind power system can be formed and becomes the extra-large vertical-axis wind power generation unit with integrated novel domestic and foreign technologies and high industrial implementation degrees.

Description

technical field [0001] The invention belongs to the technical field of machinery and electricity, and specifically proposes a power generation system device powered by a vertical axis wind turbine. Background technique [0002] The wind turbine generator system composed of wind turbines (hereinafter also referred to as wind turbines or fans) is a new energy power generation device that converts the kinetic energy of the wind into mechanical energy suitable for the shaft energy of the generator, and then drives the generator to rotate. Among the existing widely used horizontal axis turbines, the capacity of the turbine is of primary importance in the process of wind power generation. Industry practice has proved that the increase of stand-alone power is conducive to reducing the cost of installed capacity per unit power and the cost per kWh of wind power generation. Therefore, the rated power capacity of a single machine continues to increase, and the single-machine power of...

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Problems solved by technology

[0004] 1. For a horizontal-axis turbine with a stand-alone power of 10MW, its blades are 80-100 meters long. The three-pin blade is a cantilever beam structure, and one end is fixed on the hub. There is huge shear stress and low structural strength. For strong wind damage, carbon fiber materials with higher structural strength must be used. The cost of materials and processes is very high, especially in terms of survivability against strong winds; in addition, with the increase of power, the weight of the generator and the height of the tower Increase, the cost of electrical, tower and foundation construction will increase greatly, and the cost of the whole machine will rise sharply;

[0005] 2. If a 10MW-level vertical axis Darrieux turbine is used, although the blades are supported at both ends, which overcomes the disadvantage of the single-end support of the cantilever beam, the length of the main shaft is likely to exceed 100 meters. In order to ensure low shaking and rigidity during rotation , its manufacturing cost will be much higher than that of the main shaft of the horizontal axis, and the long main sha...

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