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A control method and device for a rectifier device of a direct-drive permanent magnet wind power converter

A technology of wind power converter and rectifier, which is applied in motor generator control, control of electromechanical transmission, electronic commutation motor control, etc., can solve problems such as inaccurate rotor angle

Active Publication Date: 2018-11-30
TIANJIN C E ELECTRICAL AUTOMATION CO LTD +1
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Problems solved by technology

[0004] In view of the above analysis, the present invention aims to provide a direct drive permanent magnet wind power converter rectifier control method and device to solve the problem of inaccurate rotor angle in the prior art

Method used

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  • A control method and device for a rectifier device of a direct-drive permanent magnet wind power converter
  • A control method and device for a rectifier device of a direct-drive permanent magnet wind power converter
  • A control method and device for a rectifier device of a direct-drive permanent magnet wind power converter

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Embodiment Construction

[0073] Preferred embodiments of the present invention will be specifically described below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the application and are used together with the embodiments of the present invention to explain the principles of the present invention.

[0074] First, combined with the figure 1 and 2 The method described in the embodiment of the present invention is described in detail.

[0075] Such as figure 1 as shown, figure 1 It is a schematic flow chart of the method described in the embodiment of the present invention, which may specifically include the following steps:

[0076] Step 101: Apply three-phase stator AC voltage V sa , V sb , V sc and current i sa i sb i sc ,, bus voltage, etc. for ADC conversion;

[0077] Step 102: convert the three-phase stator AC voltage V into a digital quantity sa , V sb , V sc， and current i sa i sb i sc Change abc / αβ coordinates to get V sα , ...

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Abstract

The invention relates to a method and a device for controlling a direct-drive permanent magnet wind-power converter rectifying device. The method comprises the following steps: (1) collecting a three-phase stator voltage and a three-phase stator current, transforming the three-phase stator voltage and the three-phase stator current into an alpha-beta coordinate system, and detecting transformed three-phase stator AC voltage; when detection is normal, carrying out calculation according to one of transformed three-phase stator current, a stator voltage observation value under the alpha-beta coordinate system or the three-phase stator voltage under the alpha-beta coordinate system and obtaining a back electrodynamic potential observation value under the alpha-beta coordinate system; obtaining an angular velocity omegar and a position angle phir of a rotor position through tracking regulation according to the back electrodynamic potential observation value; calculating related modulation waveform by combining with a given current according to the omegar and the phir; and controlling a PWM waveform of the rectifying device IGBT by a PWM technology, so that the speed sensorless control on a permanent magnet generator is achieved.

Description

technical field [0001] The invention relates to the technical field of new energy and generator control, in particular to a control method and method for a rectifier device of a direct-drive permanent magnet wind power converter. Background technique [0002] The direct drive wind power converter is suitable for application in the field of wind power generation. The rectification device is a direct drive permanent magnet wind power converter. , the method is mainly to construct the electromagnetic model of the generator, use the encoder to obtain the rotor angle, and combine the calculated current given, through the current regulation control module, to obtain the relevant modulation waveform, and then obtain the PWM wave through the PWM technology, and finally act on the rectifier The IGBT module in the device realizes the control of the generator to ensure that more mechanical energy is converted into electrical energy. Therefore, accurate and reliable rotor angle acquisi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/24H02P21/18
Inventor 崔安斌
Owner TIANJIN C E ELECTRICAL AUTOMATION CO LTD
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