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Wind power generation control device and wind power generation system

A wind power generation system and control device technology, applied in wind power generation, circuit devices, electrical components, etc., can solve problems such as low power generation efficiency, large loss, and narrow power generation operating range, so as to achieve improved power generation efficiency, low price, and solve power generation problems. Narrow operating range effect

Active Publication Date: 2016-07-20
DELTA ELECTRONICS INC
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

However, full power wind turbines and full power converters are expensive
Doubly-fed wind turbines are mainly composed of doubly-fed induction generators and doubly-fed converters, which are cheaper than full-power units, but have low power generation efficiency at low wind speeds
In addition, the double-fed generator used in the double-fed wind turbine has a large loss at low speed, and due to the working voltage limit of the transistor used in the converter, the double-fed wind turbine has a lower limit of operating speed, which cannot be used in low wind speed areas. Maintain the best tip speed ratio operation, and the power generation operation range is narrow

Method used

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  • Wind power generation control device and wind power generation system
  • Wind power generation control device and wind power generation system
  • Wind power generation control device and wind power generation system

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Embodiment Construction

[0056] In order to enable those skilled in the art to further understand the present invention, preferred embodiments of the present invention are listed below, and the composition of the present invention is described in detail in conjunction with the accompanying drawings. For the convenience of description, the drawings of the present invention are only schematic diagrams for easier understanding of the present invention, and the detailed proportions thereof can be adjusted according to design requirements.

[0057] Such as figure 1 As shown, the wind power generation control device 1 of the present invention is coupled between the double-fed wind power generator 2 and the grid 3, including:

[0058] The converter unit 11 includes a generator-side converter 111, a DC bus capacitor C1, and a grid-side converter 112. The AC side of the generator-side converter 111 is coupled to the rotor side of the fan 2, and the DC side of the generator-side converter 111 is coupled to The...

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Abstract

The invention discloses a wind power generation control device and a wind power generation system. The wind power generation control device is coupled between a fan and a power grid, and comprises a converter unit and a switching unit, wherein the converter unit comprises a machine side converter, a DC bus capacitor and a grid side converter; an AC side of the machine side converter is coupled to a rotor side of the fan; a DC side of the machine side converter is coupled to the DC bus capacitor; the DC side of the grid side converter is coupled to the DC bus capacitor; the AC side of the grid side converter is coupled to the power grid; the wind power generation control device is switched between a doubly-fed generation operation mode and a full-power operation mode when the wind speed meets the switching conditions.

Description

technical field [0001] The invention relates to the field of wind power generation, in particular to a wind power generation control device and a wind power generation system suitable for different wind speed environments. Background technique [0002] As we all know, current megawatt-level wind power generation systems mainly include two types of wind power generators, namely, full-power wind power generators and double-fed wind power generators. In other words, one type of wind turbine currently operates in a doubly-fed wind power generation mode, while the other wind turbine operates in a full power mode. Generally speaking, a full-power wind turbine is mainly composed of a full-power converter and a full-power generator (such as a permanent magnet synchronous generator, an electric excitation generator, and an induction generator). High power generation efficiency and good adaptability to the grid. However, full power wind turbines and full power converters are expensi...

Claims

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Application Information

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IPC IPC(8): H02J3/38
CPCH02J2300/28H02J3/381Y02E10/72Y02E10/76
Inventor 薛海芬陈丽吕飞王长永
Owner DELTA ELECTRONICS INC
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