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Full-power converter suitable for variable speed wind power generation

A converter, full power technology, which is applied in the direction of converting AC power input into AC power output, output power conversion devices, electrical components, etc. problems, to achieve the effect of no bridge arm through hidden danger, improved failure rate, good application and promotion prospects

Inactive Publication Date: 2011-08-03
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the other hand, power converters in my country's wind power field still mainly rely on imports, and the degree of localization of converters is low

Method used

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  • Full-power converter suitable for variable speed wind power generation
  • Full-power converter suitable for variable speed wind power generation
  • Full-power converter suitable for variable speed wind power generation

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Embodiment Construction

[0021] The technical embodiment of the present invention is described below in conjunction with accompanying drawing:

[0022] attached figure 1 Shown is a whole structure block diagram of a full power converter suitable for variable-speed wind power generation proposed by the present invention. figure 1 ①) and grid-side impedance source inverter ②. The ATRU is used to convert the AC voltage output by the generator into a DC voltage, and the impedance source inverter is responsible for converting the DC power with voltage changes into a constant voltage and constant frequency AC power to realize grid-connected power generation. Their structural relationship is as follows:

[0023] The three-phase output of the generator is connected to the input filter inductor L of ATRU sa , L sb and L sc , The other end of the filter inductor is connected to the three terminals a, b, and c of the autotransformer respectively. The a', b', c' and a", b", c" of the transformer output two ...

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Abstract

The invention discloses a full-power converter suitable for variable speed wind power generation, which is used for realizing the conversion of variable voltage and variable frequency output to constant voltage and constant frequency of a wind power generator. The full-power converter is composed of a multiple-pulse-wave self-coupled voltage regulating rectifier (1) at a motor side and a source impedance inverter (2) at a power grid side, wherein the self-coupled voltage regulating rectifier is used for converting alternating voltage output by a motor into direct voltage, and the source impedance inverter is used for converting voltage-variable direct current into constant-voltage and constant-frequency alternating current to be combined to the grid. Compared with the current full-power converter, the full-power converter has the advantages of simple structure, high reliability and the like, is greatly suitable for occasions needing less maintenance and even free maintenance of future offshore wind power generation and the like, and has a good application and promotion prospect.

Description

technical field [0001] The invention relates to a full-power converter in the technical field of wind power generation, which is used to realize the conversion from the variable-frequency and variable-voltage output of the generator to the constant-frequency and constant-voltage output. technical background [0002] As a kind of green renewable energy, wind energy has been widely developed and utilized in recent years, especially wind power technology, which has become the focus and focus of current research at home and abroad. According to the statistics of the Global Wind Energy Association, in 2009, the newly installed capacity in the world was 38.208 million kilowatts, a year-on-year increase of 47.3%, exceeding 30% for many years in a row. The development speed of wind power in my country is second to none. In 2009 alone, the new installed capacity was 13.8033 million kilowatts, and the cumulative installed capacity was 25.8053 million kilowatts, an increase of 115% ove...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02M5/458
Inventor 陈杰龚春英陈家伟陈冉陈志辉严仰光
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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