A kind of wind power generating set and control method

A technology of wind power generators and doubly-fed generators, which is applied in the direction of wind power generation, control of generators and electrical components through magnetic field changes, and can solve the problems of large proportion and poor efficiency, and achieve reduced losses, simple operation, and low cost. The effect of grid-connected power generation

Active Publication Date: 2019-07-09
CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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  • Application Information

AI Technical Summary

Problems solved by technology

In the current doubly-fed generator set, the connection mode of the stator winding is fixed, but because the stator is directly connected to the grid, and the grid voltage is fixed, the relatively fixed iron loss accounts for a large proportion in low-power operation, so the efficiency is poor in low-power operation

Method used

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  • A kind of wind power generating set and control method
  • A kind of wind power generating set and control method
  • A kind of wind power generating set and control method

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0025] like Figure 1 to Figure 5 As shown, the wind power generating set of this embodiment includes a control unit 6, a converter 3, a doubly-fed generating set 2 and an impeller 1, the doubly-fed generating set 2 is mechanically connected to the impeller 1, and the stator of the doubly-fed generating set 2 is connected to The power frequency power grid (or connected to the power frequency power grid through the grid-connected unit 7), the rotor is connected to the converter 3, and the first and last ends of the winding units in each phase winding in the stator of the doubly-fed generator set 2 are led out of the generator body , and connected to the grid-connected unit 7 via a switch unit 5, and then connected to the power frequency grid, wherein a filtering unit 4 is set between the switch unit 5 and the double-fed generator set 2, and the ...

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Abstract

The invention discloses a wind generating set. The wind generating set comprises a control unit, a current transformer, a doubly-fed generating set and a switch unit; head and tail ends of a winding unit in each phase winding of a stator of the doubly-fed generating set are leaded to the outside of a generator body, and are connected to a power frequency power grid through the switch unit; a rotor is connected with the current transformer; and the control unit is respectively connected with the doubly-fed generating set and the switch unit, and are used to control a switching sate of the switch unit according to a wind condition or a working state of the doubly-fed generating set so as to change a connection mode of three-phase windings of the stator. Generating set of the invention has the advantages of simple structure, high power generation efficiency and the like. According to the control method of the wind generating set, the control unit controls switching of the switch unit and changes the connection mode of the three-phase windings in accordance with the wind condition and the state of the doubly-fed generating set so as to be suitable for different working conditions. The control method of the invention has the advantages of easy and simple operation, easy implementation and the like.

Description

technical field [0001] The invention mainly relates to the technical field of wind power generation, in particular to a wind power generating set and a control method. Background technique [0002] Wind turbines are equipment that convert wind energy into electrical energy. The wind speed of natural wind usually changes in a large range. In order to obtain more energy from natural wind, the ratio of blade tip rotation speed to fan speed must meet certain functional conditions, which requires wind turbines to operate at variable speeds. . [0003] Thinking about wind turbines from this perspective, the electrical system of wind turbines is actually an electric drive system with frequency conversion as the core, an integrated system of power electronic converters and generators, and an integrated system of power generation systems and power grids. Higher transmission efficiency, wider speed regulation range, and more economical speed regulation cost are the eternal pursuit g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38H02P9/16
CPCH02J3/386H02P9/16Y02E10/76
Inventor 赵燕峰刘璐何贻春王靛李慧新臧晓笛陈林翟大勇
Owner CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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