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Grid-connection system of wind turbine generator set

A technology for wind turbines and generators, which is applied to the parallel feeding arrangement of a single network, etc., can solve the problems that the frequency of the output power of the wind turbine is not constant, and the speed of the fan blades of the wind turbine is not constant.

Inactive Publication Date: 2014-06-18
CSIC CHONGQING HAIZHUANG WINDPOWER EQUIP
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Wind turbines are generally installed on open grasslands, Gobi or oceans, because the wind speed changes with the seasons, and even the wind force in a day is also constantly changing, so the speed of the blades of the wind turbines is not constant, resulting in The frequency of the output power of wind turbines is not constant, and the power grid has strict requirements on the frequency of the integrated power. Therefore, a grid-connected system of wind turbines is urgently needed to meet the grid-connected requirements of wind turbines.

Method used

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  • Grid-connection system of wind turbine generator set

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Embodiment 1

[0030] figure 1 It is a structural diagram of a grid-connected system of a wind power generating set provided in an embodiment of the present application.

[0031] Such as figure 1 As shown, the grid-connected system provided by this embodiment includes four rectification and inverter devices 20 .

[0032] The input terminals of the four rectifying and inverter devices 20 are respectively connected 11 to the electric energy output terminals of the generator 10 of the wind power generating set, and the output terminals are connected 31 to the primary coil line of the grid-connected transformer 30 .

[0033] The rectification and inverter device 20 is used to receive the electric power generated by the generator 10 for rectification-inversion, to output electric energy with the same frequency as the grid, and to output the electric energy to the grid (not shown) through the step-up of the grid-connected transformer 30 middle.

[0034] The frequency, phase and voltage of the e...

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Abstract

The invention provides a grid-connection system of a wind turbine generator set. The grid-connection system of the wind turbine generator set comprises four rectifying inverting devices which are respectively used for receiving electric energy from the electric energy output ends of generators of the wind turbine generator set, conducting rectification-inversion and then outputting the electric energy, wherein the frequency of the electric energy is identical to that of a grid. No matter what the frequency of the electric energy output by the generators is, the frequency of the electric energy output by the rectifying inverting devices is identical to the frequency of the grid all the time, and therefore the wind turbine generator set can be connected with the grid.

Description

technical field [0001] The present application relates to the technical field of wind power generation, and more specifically, to a grid-connected system of wind power generators. Background technique [0002] Wind turbines are generally installed on open grasslands, Gobi or oceans, because the wind speed changes with the seasons, and even the wind force in a day is also constantly changing, so the speed of the blades of the wind turbines is not constant, resulting in The frequency of the output power of wind turbines is not constant, and the power grid has strict requirements on the frequency of the integrated power. Therefore, a grid-connected system of wind turbines is urgently needed to meet the grid-connected requirements of wind turbines. . Contents of the invention [0003] In view of this, the present application provides a grid-connection system of a wind power generating set, which is used for grid-connecting the wind power generating set to a power grid. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38
Inventor 杨兴华刘亚林闫中杰王珏张海亚王叶徐骋曦张帆
Owner CSIC CHONGQING HAIZHUANG WINDPOWER EQUIP
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