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A cascaded speed shift frequency constant wind power generation system

A wind power generation system, variable speed and constant frequency technology, applied in control systems, control generators, electrical components, etc., to achieve excellent performance, improve operational reliability, and optimize power grid quality.

Inactive Publication Date: 2008-08-13
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The development of a variable-speed constant-frequency wind power generation system with high efficiency, low cost, reliable operation and good power supply performance is an ideal that has been pursued in the field of wind power generation but has not been fully realized.

Method used

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  • A cascaded speed shift frequency constant wind power generation system
  • A cascaded speed shift frequency constant wind power generation system
  • A cascaded speed shift frequency constant wind power generation system

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Embodiment Construction

[0034] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings of this specification. The same parts and components appearing in the drawings of this specification all use the same symbols.

[0035] The scheme of cascade variable speed constant frequency wind power generation system is as follows: figure 1 As shown, it mainly consists of four parts: wind turbine 1, dual-rotor motor 2, low-speed generator 3, and frequency converter 4, wherein the dual-rotor motor 2 is a synchronous permanent magnet motor with a dual-rotor structure. It includes a slip ring 21 , an outer rotor 22 and an inner rotor 23 . The difference from the common synchronous permanent magnet motor is that the constraint on the stator is released, so that it can be transformed into an outer rotor 22 . The inner rotor 23 is provided with a three-phase winding and is connected to the frequency converter 4 through a slip ring ...

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Abstract

The invention discloses a cascading variable speed constant frequency wind power system, comprising a winder machine, a double rotor motor, a generator and a transducer; wherein, the double rotor motor comprises a slip ring, a outer rotor, and an inner rotor; the generator comprise a stator and a rotor; the wind machine is cascaded with the inner rotor through a shaft one; the inner rotor is equipped with a three-phase winding, and connected with the transducer; the outer rotor is cascaded with the generator through a shaft two; the stator of the generator has the three-phase winding connected with grid inside. With cascading electric transmission structure, the invention accomplishes function of variable speed constant frequency electricity generation by forming collection of power associated with variable frequency magnetism speed adjustment. The invention also removes the step of speed raising gear case transmission, and reduces failure rate of system. The generator is connected with grid. The power rating capacity of power electronic component can be reduces obviously. The invention is appropriate for the field of wind power generation, steamer generator set, water wheel generator set, internal combustion engine generator, etc.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to a novel cascade variable-speed constant-frequency wind power generation system. Background technique [0002] As we all know, with the shortage of resources and the increasingly serious greenhouse effect, countries around the world have gradually increased their efforts to develop and utilize renewable and non-polluting energy. Wind power is the one that comes closest to being practical. Since wind power is an unstable power source, the wind speed often changes; while wind power generators are connected to the grid, the frequency of wind power is required to remain constant. In order to solve the contradiction between wind speed and wind power frequency, various solutions have been proposed, among which the variable speed and constant frequency power generation method is the most effective. [0003] At present, there are two general variable-speed constant-frequen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P9/42H02K16/02
Inventor 赵克刚黄向东罗玉涛
Owner SOUTH CHINA UNIV OF TECH
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