Hybrid wind power generation system

A technology for wind power generation systems and induction generators, applied in wind power generator components, wind power generation, wind power engines, etc., can solve the problems of permanent magnet generators such as loss of magnetism, excessive volume, and large losses, and achieve high reliability, Improved reliability and high power

Inactive Publication Date: 2012-09-05
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above problems, the object of the present invention is to provide a permanent magnet generator that can not only avoid the fault problem of the speed-up gearbox in the variable-speed constant-frequency double-fed wind power generation system, but also overcome the problems of the variable-speed constant-frequency direct-drive permanent magnet wind power generation system. Hybrid wind power generation system with problems of loss of magnetism, excessive volume and large loss

Method used

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Embodiment Construction

[0018] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0019] Such as figure 1 As shown, the present invention includes a wind wheel 1, the wind wheel 1 is connected with a main shaft 2 through a bearing, the main shaft 2 is connected with a low speed-up ratio gear box 3, and the low speed-up speed ratio gear box 3 can be connected at a lower speed through a coupling. The wire-wound doubly-fed induction generator 4 connected under operation, the speed of the wire-wound doubly-fed induction generator 4 is lower than 800 revolutions per minute, and the rotor winding 41 of the wire-wound doubly-fed induction generator 4 operates with four-quadrant operation One end of the converter 5 is connected, the other end of the rotor converter 5 is connected to the grid 7, the stator winding 42 of the wound doubly-fed induction generator 4 is connected to one end of the stator AC-DC converter 6, and the stator AC-DC c...

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Abstract

The invention relates to a hybrid wind power generation system which is characterized by comprising a wind wheel, wherein the wind wheel is connected with the input end of a gearbox with low speed increasing ratio; the output end of the gearbox with low speed increasing ratio is connected with a winding doubly-fed induction generator by a coupling; a rotor winding of the winding doubly-fed induction generator is connected with one end of a rotor current converter; a stator winding of the winding doubly-fed induction generator is connected with one end of a stator AC-DC-AC converter; the rotorcurrent converter and the other end of the stator AC-DC-AC converter are connected into a power grid. The invention transmits wind power to the power grid by AC-DC-AC conversion, has mature and reliable technology and can be widely applied in the power generation process of converting the wind power into power energy.

Description

technical field [0001] The invention relates to a wind power generation system, in particular to a hybrid wind power generation system for converting wind power into electric energy. Background technique [0002] Generally, wind power generation systems are divided into two types: constant speed and constant frequency and variable speed and constant frequency. Constant speed and constant frequency wind turbines have a simple structure. Most of the early wind power generation systems used constant speed and constant frequency technology. The utilization rate of wind energy is not high. With the development of control technology and the level of power electronic devices, variable speed and constant frequency technology began to rise in the 1990s. The speed of the wind rotor of the variable speed constant frequency wind turbine changes with the change of the wind speed, so that the wind energy can be used more effectively, and the electric energy with a constant frequency can...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38F03D9/00F03D11/00F16H57/02F03D9/25F03D15/10
CPCY02E10/763Y02E10/725Y02E10/722Y02E10/72Y02E10/76
Inventor 孙元章李国杰
Owner TSINGHUA UNIV
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