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Speed changing constant frequency method of wind force generation

A variable speed, constant frequency, wind turbine technology, applied in the direction of controlling generators, electrical components, control systems, etc., can solve the problems of large generator system structure, expensive inverter equipment, and not very mature, so as to reduce the cost and improve The effect of power generation efficiency and overall cost reduction

Inactive Publication Date: 2006-06-28
XIAN UNIV OF TECH
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Problems solved by technology

For large-scale wind turbine systems, the power loss of rheological mechanisms in these variable-speed constant-frequency schemes is mostly 15%-20% due to the use of traditional rectification and inverter methods, and expensive converter equipment is required. Especially the megawatt-level permanent magnet generator set and its converter equipment, so the entire generator system has a huge and complex structure. If the method of reducing power loss and converter is used, the current domestic technology is not very mature.

Method used

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  • Speed changing constant frequency method of wind force generation
  • Speed changing constant frequency method of wind force generation
  • Speed changing constant frequency method of wind force generation

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Embodiment Construction

[0015] Below in conjunction with accompanying drawing and embodiment the present invention will be described in further detail:

[0016] Such as figure 1 As shown, a variable speed and constant frequency method for wind power generation,

[0017] 1) A differential permanent magnet motor 3 is adopted, and its input shaft 10 and output shaft 23 are respectively connected with the output shaft of the speed-increasing gearbox 2 and the shaft of the control motor 4 with couplings, and at the same time, the wind turbine rotor 1 and the The input rotating shaft of step-up gearbox 2 is connected.

[0018] 2) The stator coil 11 of the differential permanent magnet motor 3 is electrically connected to the power grid 9 via the power feeder 7: the electric power line for controlling the motor 4 is electrically connected to the input end 33 of the inverter 5: the output end 8 of the inverter 5 is connected to the The power feeder 7 is electrically connected in parallel, and the controlle...

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Abstract

This invention discloses a shift gear constant frequency method for wind power generation characterizing in increasing the speed of the rotating speed of a rotor of a wind power machine by a speed increasing gear box then inputting the input power generated by the shift into a input shaft of a differential permanent magnet motor and the differential unit of which carries out power shunt or merge to generate a power flow to enter into the stator winding of the motor to realize generation with constant speed and constant frequency to network via feed lines, which can increase the generation efficiency greatly.

Description

technical field [0001] The present invention relates to a variable speed and constant frequency method for a power generation system, in particular to a variable speed and constant frequency method for wind power generation. Background technique [0002] In the process of wind power generation, in order to maximize the capture of wind energy, the speed of the input generator shaft is required to change with the wind speed, that is, variable speed; The frequency is the same, that is, constant frequency. However, at present, in large-scale distributed power generation systems such as wind power generation, the variable-speed constant-frequency methods widely used mainly include: cage-type asynchronous generator variable-speed constant-frequency system, AC excitation double-fed generator variable-speed constant-frequency system, brushless double-fed power generation system Machine variable speed constant frequency system and permanent magnet generator variable speed constant f...

Claims

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Application Information

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IPC IPC(8): H02P9/06
Inventor 穆安乐刘宏昭
Owner XIAN UNIV OF TECH
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