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Method and device for braking vertical axis wind turbine

A technology of wind power generators and braking devices, applied in the control of wind power generators, wind power generators, wind power generators at right angles to the wind direction, etc., can solve the problems of reducing the windward area, low speed, high torque, etc., to avoid impact , avoid emergency shutdown, improve the effect of safety

Inactive Publication Date: 2010-12-22
NAT WIND ENERGY
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Problems solved by technology

In the existing large-scale horizontal axis wind turbines, disc or brake brakes are usually used, while the vertical axis wind turbines are inherently low-speed, high-torque, and unable to yaw in strong winds to reduce the windward area , so conventional braking devices cannot be applied to vertical axis wind turbines of the same power

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  • Method and device for braking vertical axis wind turbine
  • Method and device for braking vertical axis wind turbine
  • Method and device for braking vertical axis wind turbine

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Embodiment Construction

[0025] Existing wind turbines need to reduce the speed of the wind rotor by yaw and other methods after the wind speed exceeds the predetermined safety range, especially when the wind speed reaches a typhoon-like speed, the emergency brake installed on the transmission shaft is often used to reduce the speed of the wind rotor. Wait for a forced shutdown to achieve self-protection. This sudden shutdown in an emergency will have a great impact on the complete and stable operation of the grid, and it is also a waste of wind energy resources. For this reason, the vertical axis wind turbine braking method provided by the present invention abandons the traditional braking idea of ​​sudden shutdown in emergency situations, and through the combined use of various braking means, it realizes the The speed limit operation not only ensures the safety of the wind turbine itself, but also avoids excessive impact on the power grid.

[0026] In the present invention, various braking means us...

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Abstract

The invention discloses a method and a device for braking a vertical axis wind turbine. The method comprises the following steps of: after the vertical axis wind turbine starts, monitoring the rotating speed of the vertical axis wind turbine; under the condition that the rotating speed of the vertical axis wind turbine exceeds a safe value, starting an electromagnetic brake and a pneumatic brake respectively, wherein the electromagnetic brake and the pneumatic brake are alternately started according to the magnitude of a turning moment to realize braking; and under the condition of unobvious braking effects of the electromagnetic brake and the pneumatic brake, continuously starting a brake resistance contactor to perform rheostatic braking. Due to the combination of a plurality of braking methods, the method and the device for braking the vertical axis wind turbine have the advantages of effectively controlling the rotating speed of the wind turbine, avoiding the emergency stop at high wind speed, improving the safety of the vertical axis wind turbine and avoiding overlarge impact on a power grid.

Description

technical field [0001] The invention relates to a braking method for a vertical axis wind power generator, and also relates to a braking device for realizing the braking method, belonging to the technical field of wind power generation. Background technique [0002] Wind energy is the most promising renewable energy besides water energy, and has been highly valued by countries all over the world. China has become the most active wind power market in the world. In 2009, the installed capacity of new wind power in the country exceeded 8 million kilowatts, and the cumulative total capacity has reached more than 20 million kilowatts. Therefore, the market prospect of my country's wind power equipment manufacturing industry and related fields is very broad. [0003] Wind turbines are classified according to the direction of the rotation axis, which can be divided into two types: horizontal axis and vertical axis. At present, the horizontal axis wind turbine is widely used, but...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D7/06F16D65/28
CPCF03D3/005Y02E10/723F05B2260/903F05B2260/902F03D7/0248Y02E10/74
Inventor 蒋大龙盛明凡王建辉
Owner NAT WIND ENERGY
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