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Megawatt direct driving type wind and electric joint-net current transformer

A direct-drive, converter technology, applied in wind power generation, conversion equipment for intermediate conversion to DC, conversion of AC power input to AC power output, etc., can solve the constraints of wind power industrialization process, megawatt-level variable speed Constant-frequency wind power electronic control equipment power converters rely on foreign imports and other issues to achieve the effects of improving competitiveness, high power levels, and realizing power factor

Inactive Publication Date: 2007-10-10
HARBIN JIUZHOU ELECTRICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the long-term dependence on foreign imports of megawatt-level variable-speed constant-frequency wind power electronic control equipment, especially power converters, it restricts the process of wind power industrialization in my country

Method used

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  • Megawatt direct driving type wind and electric joint-net current transformer
  • Megawatt direct driving type wind and electric joint-net current transformer
  • Megawatt direct driving type wind and electric joint-net current transformer

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Embodiment Construction

[0024] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in more detail:

[0025] With reference to Fig. 4, this embodiment includes: a wind power generator with a megawatt power level, a three-phase filter capacitor C on the generator side f1 , rectifier unit, step-up chopper unit, inverter unit, grid-side three-phase filter capacitor C f2 、C f3 , transformers and power frequency grids. The rectifier unit is composed of a three-phase uncontrolled diode rectifier, which includes six diodes (D 1 ~D 6 ). The boost chopper unit is formed by multiple boost choppers, and each boost chopper is composed of a DC side filter capacitor C 1 , inductance L 1 , switch tube T 1 , Diode D 7 and DC side support capacitor C 2 and C 3 constitute. The inverter unit is composed of two or more three-phase fully-controlled inverters connected in parallel, and each inverter is composed of six switching tubes (T 11 ~T 16 , T 21 ~T ...

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Abstract

The convertor includes three-phase filter capacitor (TFC), rectifier unit, and step up chopper unit, inverter unit at generator side as well as TFC and transformer at network side. Wind driven generator is connected to TFC, and TFC is connected to the rectifier unit. The rectifier unit is connected to the step up chopper unit, and the step up chopper unit is connected to the inverter unit. The inverter unit is connected to TFC, and the TFC is connected to transformer. The transformer is connected to power grid in power frequency. The invention reduces cost of Wind driven generation equipment greatly, and raises competitive power.

Description

(1) Technical field [0001] The invention belongs to the field of energy technology, and in particular relates to a full-power grid-connected converter for wind power generation with megawatt-level power. (2) Background technology [0002] Wind power generation has shown a strong momentum of development in the entire world electricity market. In order to promote the development of grid-connected wind power generation, the National Development and Reform Commission formulated the "Renewable Energy Medium and Long-term Development Plan" clearly requiring that the national installed capacity of wind power in 2010 reach 5 million kilowatts, and the national installed wind power capacity will reach 30 million kilowatts by 2020. At present, the single-unit capacity of wind turbines continues to increase, and variable-speed constant-frequency and variable-pitch wind turbines gradually occupy a dominant position. Variable-speed constant-frequency AC excitation doubly-fed motors and ...

Claims

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Application Information

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IPC IPC(8): H02M5/44H02M5/458H02M1/12H02J3/38
CPCY02E10/763Y02E10/76
Inventor 李寅官二勇周维来孙敬华裴景斌张哲
Owner HARBIN JIUZHOU ELECTRICAL CO LTD
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