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A two-speed permanent magnet wind power generation system

A technology of wind power generation system and permanent magnet motor, which is applied in the direction of wind power generation, wind power engine, wind power motor combination, etc., can solve the problem that the variable speed wind power generation system cannot take into account the range of speed adjustment and power density, etc., so as to improve the conversion efficiency of wind energy, improve Mechanical power, the effect of increasing the speed adjustment range

Active Publication Date: 2020-12-08
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0006] Aiming at the defects of the prior art, the purpose of the present invention is to provide a two-speed permanent magnet wind power generation system, which aims to solve the problem that the existing variable speed wind power generation system cannot take into account the speed adjustment range and power density

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  • A two-speed permanent magnet wind power generation system
  • A two-speed permanent magnet wind power generation system
  • A two-speed permanent magnet wind power generation system

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Embodiment Construction

[0027] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0028] Such as figure 2 As shown, the two-speed permanent magnet wind power generation system provided by the present invention includes a coaxially connected impeller 1, a two-speed permanent magnet motor 2, a converter 3 and a transformer 4;

[0029] The impeller 1 includes multiple blades distributed horizontally or vertically, and is connected to the input end of the two-speed permanent magnet motor 2 to realize wind energy capture; in practical applications, the impeller 1 can be connected to the two-speed permanent magnet motor 2 through a variable speed gearbox ; The output end of the two-...

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Abstract

The invention discloses a double-speed permanent magnet wind power generation system. The double-speed permanent magnet wind power generation system comprises an impeller, a double-speed permanent magnet motor, a current transformer and a transformer which are coaxially connected, the impeller is connected with the input end of the double-speed permanent magnet motor, the output end of the double-speed permanent magnet motor is connected with the input end of the converter, the output end of the converter is connected with a power grid through the transformer, the double-speed permanent magnetmotor can generate two kinds of magnetic fields with different pole pairs to achieve two rated working rotating speeds, and is used for converting wind energy captured by the impeller into electric energy, and the converter is used for switching the working state of a stator winding of the double-speed permanent magnet motor through a switch so as to monitor and process the electric energy conversion process. The double-speed permanent magnet wind power generation system is high in power density and high in motor efficiency; and the double-speed permanent magnet motor can generate the two magnetic fields with different pole pairs so as to achieve two rated working rotating speeds, then the rotating speed adjusting range is enlarged, and the wind energy conversion efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of new energy power generation, and more specifically relates to a two-speed permanent magnet wind power generation system. Background technique [0002] Wind power is the most promising renewable energy power generation technology besides hydropower. In recent years, wind power has developed rapidly in our country, and our country has become a veritable wind power country. [0003] The characteristics of wind turbines are usually determined by a cluster of wind energy utilization coefficients C p The dimensionless performance curve of the wind energy utilization coefficient is a function of the tip speed ratio λ of the wind turbine generator. If the pitch angle is kept constant, it can be used as figure 1 C shown p The (λ) curve represents the relationship between the wind energy utilization coefficient and the tip speed ratio. The tip speed ratio λ can be expressed as Where Ω is the angular velocity ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03D9/25H02K1/27
CPCY02E10/72
Inventor 谢康福李大伟曲荣海
Owner HUAZHONG UNIV OF SCI & TECH
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