Dynamic electric brake for a variable speed wind turbine having an exciter machine and a power converter not connected to the grid

A wind turbine, electric braking technology, applied in control systems, electric vehicles, motors, etc., can solve problems such as damage, huge mechanical force of wind turbine components, and achieve the effect of avoiding power fluctuations

Inactive Publication Date: 2012-10-03
英捷电力技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This mode of operation generates enormous mechanical forces in wind turbine components, which can cause premature failure

Method used

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  • Dynamic electric brake for a variable speed wind turbine having an exciter machine and a power converter not connected to the grid
  • Dynamic electric brake for a variable speed wind turbine having an exciter machine and a power converter not connected to the grid
  • Dynamic electric brake for a variable speed wind turbine having an exciter machine and a power converter not connected to the grid

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Embodiment Construction

[0043] A variable speed wind turbine according to various exemplary embodiments is described below. The several drawings are referred to by way of illustration only for a better understanding of the invention. In addition, the same reference numerals will be used throughout the specification to refer to the same or similar parts.

[0044] overview

[0045] In general, variable speed wind turbine generators according to various exemplary embodiments of the present invention deliver electrical power generated by the rotor during supersynchronous operation of a doubly-fed induction generator to an exciter. The exciter then converts this electrical energy back into mechanical rotational energy which can then be used to further increase the electrical power generated by the stator delivered to the grid. Electric power is only delivered to the grid by the stator of the DFIG, thereby avoiding power delivery to the grid through the power converter. The quality of the electrical pow...

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PUM

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Abstract

A variable speed wind turbine having a doubly fed induction generator (DFIG), includes an exciter machine mechanically coupled to the DFIG and a power converter placed between a rotor of the DFIG and the exciter machine. Thus, the power converter is not directly connected to the grid avoiding the introduction of undesired harmonic distortion and achieving a better power quality fed into the utility grid. Moreover, the variable speed wind turbine includes a power control and a pitch regulation.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to U.S. Application No. 11 / 477,593, filed June 30, 2006, and U.S. Provisional Application No. 60 / 783,29, filed March 17, 2006, the disclosures of which are hereby incorporated by reference in their entirety . technical field [0003] The present invention relates to the field of variable speed wind turbines, and in particular to variable speed wind turbines comprising a doubly fed induction generator (DFIG), an exciter, an intermediate static converter not connected to the grid, power control and pitch regulation. Background technique [0004] In recent years, wind turbines have grown considerably worldwide. This growth is generally expected to continue for decades to come, even though the industry and technology has risen to a level of maturity in this field. As the total base of installed wind capacity continues to increase as wind farms grow in size, the importance of improving pow...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P9/00
CPCH02P2009/004Y02T10/643H02P2101/15
Inventor 格雷戈里奥・里瓦斯伊凯尔・加门迪亚约苏・埃洛里亚加赫苏斯・马约尔哈维尔・佩雷斯・巴瓦查诺大卫・舒莱约根・阿塞多
Owner 英捷电力技术有限公司
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