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AC-DC converter, wind driven generator set and wind farm system

A wind power generation unit, AC-DC conversion technology, applied in the field of AC-DC conversion devices and wind farm systems, can solve the problems of poor system stability, large line loss power, high line cost, etc., to reduce line cost and reduce line active power consumption , Improve the effect of system stability

Pending Publication Date: 2019-02-22
BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, using high-voltage AC transmission, the cost of the line is high, the lossy power of the line is large, and the system stability is poor

Method used

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  • AC-DC converter, wind driven generator set and wind farm system
  • AC-DC converter, wind driven generator set and wind farm system
  • AC-DC converter, wind driven generator set and wind farm system

Examples

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Embodiment Construction

[0039] The characteristics and exemplary embodiments of various aspects of the present invention will be described in detail below. In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only configured to explain the present invention, not to limit the present invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by showing examples of the present invention.

[0040] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and ...

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PUM

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Abstract

The embodiment of the invention discloses an AC-DC converter, a wind driven generator set and a wind farm system. The AC-DC converter comprises a multi-winding phase-shifting transformer and a cascaded rectifier. The multi-winding phase-shifting transformer comprises a primary winding and N secondary windings. The cascaded rectifier comprises N three-phase rectifying units. The i-th secondary winding is connected to the i-th three-phase rectifying unit, wherein 1 <= i <=N. The negative pole of the DC output end of the first three-phase rectifying unit and the positive pole of the DC output endof the N-th three-phase rectifying unit are used as external connection interfaces. The positive pole of the DC output end of the j-th three-phase rectifying unit is connected to the negative pole ofthe DC output end of the (j+1)th three-phase rectifying unit, wherein 1 <= j <= N-1. The AC-DC converter, the wind driven generator set and the wind farm system in the embodiment of the invention canreduce the line cost and the active power consumption of the line, and improve system stability.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to an AC / DC conversion device, a wind power generating set and a wind farm system. Background technique [0002] At present, most of the transmission links in wind farms are high-voltage AC transmission methods. Wind farm systems based on AC transmission methods such as figure 1 shown. The wind farm system based on the AC transmission method includes: wind turbine 1 , generator 2 , wind power converter 3 , box-type transformer 4 , AC collector line 5 , main transformer 6 and power grid 7 . [0003] The wind turbine 1 absorbs wind energy and transforms it into mechanical energy for input into the generator 2 . The generator 2 converts mechanical energy into electrical energy and inputs it into the wind power converter 3 . The wind power converter 3 generates low-voltage alternating current and inputs it into the box-type transformer 4 . The box-type transformer 4 c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/25H02J3/38
CPCH02J3/386H02M7/25H02M1/007Y02E10/76Y02E40/10
Inventor 王鹏杨志千李战龙
Owner BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP CO LTD
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