Frequency division doubly-fed wind generator

A technology for wind turbines and doubly-fed generators, which is applied to wind turbines, wind turbine combinations, wind energy power generation, etc., can solve the problems of reducing the utilization hours of wind turbines, affecting the economic benefits of wind farms, and poor working conditions, and reaching the volume of And the effect of weight reduction, failure rate reduction, and reduction of maintenance outage time

Inactive Publication Date: 2013-09-18
XI AN JIAOTONG UNIV +2
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AI Technical Summary

Problems solved by technology

[0007] Thirdly, wind turbines are generally installed in the wilderness, the field, mountain passes, seas and other places with strong wind energy and no shelter around them. The working conditions of gears running at high speed and heavy load are relatively harsher than other parts. , the probability of failure is relatively high, and it is very difficult to overhaul
At the same time, frequent maintenance and long maintenance cycle greatly reduce the utilization hours of wind turbines and seriously affect the economic benefits of wind farms

Method used

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  • Frequency division doubly-fed wind generator
  • Frequency division doubly-fed wind generator
  • Frequency division doubly-fed wind generator

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Embodiment Construction

[0023] The present invention will be further described in detail below in conjunction with specific embodiments, which are for explanation rather than limitation of the present invention.

[0024] Such as figure 1 As shown, a frequency division doubly-fed wind power generator includes a fan, a generator, and a transformer. The generator is a doubly-fed generator, and the transformer is a low-frequency step-up transformer; Two-stage gearboxes with low speed-increasing ratio are used to connect, and the doubly-fed generator outputs 50 / 3Hz±5Hz low frequency alternating current.

[0025] Specifically, the frequency division doubly-fed wind generator includes the following further structural components:

[0026] 1) The generator adopts a wound asynchronous generator. The connection between the generator and the inverter is the same as the traditional double-fed asynchronous motor, that is, the generator rotor is connected through an AC / DC / AC inverter, AC / DC / AC The frequency converter is ...

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Abstract

The invention discloses a frequency division doubly-fed wind generator comprising a fan, a generator and a transformer. The frequency division doubly-fed wind generator is characterized in that the generator is a doubly-fed generator, the transformer is a low-frequency booster transformer, the fan is connected with the doubly-fed generator through a two-stage gearbox with low speed increasing ratio, and the doubly-fed generator outputs low-frequency alternating current about 50 / 3Hz. One high-speed rotation gearbox is omitted from the wind generator set, so that operational maintenance cost and generator production cost are reduced greatly, reliability is improved greatly, and the frequency division doubly-fed wind generator is well suitable for the grid connection of large-scale wind farms by frequency division power transmission technology.

Description

Technical field [0001] The invention belongs to the technical field of wind generators, and relates to a frequency division double-fed wind generator. Background technique [0002] Wind energy is a kind of green and renewable energy. Vigorously developing wind energy is of great significance to solving the global energy crisis and environmental crisis. Grid-connected wind power is the main method of large-scale wind energy application, and this method currently has two main bottlenecks: on the one hand, wind power fluctuates greatly, and it is generally far away from the load center. The impact of large-scale wind power access on the system Restricting the development of wind power, choosing a reasonable grid-connected plan is a key factor in its development; on the other hand, it is the issue of efficiency and cost. Reducing operating costs, increasing the operating life of the unit and improving efficiency, thereby reducing the investment recovery period, has always been the g...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02K7/18F03D9/00
CPCY02E10/72Y02E10/76Y02P70/50
Inventor 王锡凡闫玉昆宁联辉
Owner XI AN JIAOTONG UNIV
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