Full power combination converter for megawatt wind power generation

A technology of wind power generators and converters, which is applied in wind power generation, conversion of AC power input to AC power output, and conversion of AC power input to DC power output. Converters rely on foreign imports, restricting the process of wind power industrialization, etc., to facilitate the serialization of products, reduce the stress of the transmission system, and reduce copper consumption

Inactive Publication Date: 2007-08-08
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 electro

Method used

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  • Full power combination converter for megawatt wind power generation
  • Full power combination converter for megawatt wind power generation
  • Full power combination converter for megawatt wind power generation

Examples

Experimental program
Comparison scheme
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Embodiment

[0039] 1. First build the basic converter power unit. Combined with Figure 7, the three filter capacitors C 1f Connect in parallel to the three-phase smoothing inductor L according to the star connection 1n One end, then the smoothing inductor L 1n The other end is connected to the V of the generator side converter 11 ~V 13 place. The specific implementation of the generator side converter is to combine six switching devices (VT 11 ~VT 16 ) with freewheeling diode (D 11 ~D 16 ) (the present invention uses IGBT but not limited to IGBT) two groups of two, respectively VT 11 and VT 14 , VT 13 and VT 16 , VT 15 and VT 12 , and then two devices in each group are connected end to end to form three groups of bridge arms, and the connection points are V 11 , V 12 , V 13 The three groups of bridge arms are connected in parallel to form the main circuit of the three-phase fully-controlled converter. The DC output terminal of the fully-controlled converter on the generato...

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PUM

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Abstract

The invention provides one megawatt wind motor power network integration alternator, which comprises wind motor and low voltage electrical net or lift transducer and at least two basic transducer power units with each one connected to form power main circuit, wherein, the basic transducer power unit comprises motor side three-phase PWM total transducer and PWM side integration transducer; power transducer main circuit output end connects low voltage network or lift transducer; the input end of transducer main circuit is connected to wind motor.

Description

(1) Technical field [0001] The invention relates to the technical field of wind power generation, in particular to a wind power generation converter. (2) Background technology [0002] As a clean, pollution-free renewable energy, wind energy has attracted more and more people's attention, and wind power will become one of the most developed new energy sources in the 21st century. 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. The gearbox is a component with a high overload and premature failure rate in the current MW-level wind turbines. Since the end of the last century, wind turbine manufacturers headed by Enercon in Germany have introduced a series of direct-drive wind power generation systems without gearboxes. . This unit adopts the way of direct coupling connection between multi-stage wind generator and impeller for driving, which...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02M5/44H02M1/12H02M5/458H02M7/5387H02M7/5395
CPCY02E10/763Y02E10/76
Inventor 李寅官二勇周维来丁兆国孙敬华白德芳邓志平顾春明金庆才刘振龙庞宇刚刘宇光
Owner HARBIN JIUZHOU ELECTRICAL CO LTD
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