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Chopper self-inspection method for wind generator converter, and controller

A converter and chopper technology is applied in the field of chopper self-checking methods and controllers, and can solve the problems of low reliability of wind turbine converters.

Active Publication Date: 2017-11-21
SUNGROW POWER SUPPLY CO LTD
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Problems solved by technology

[0004] The invention provides a chopper self-inspection method and controller of a fan converter to solve the problem of low reliability of the fan converter caused by the inability to predict whether the chopper can work normally in the prior art

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  • Chopper self-inspection method for wind generator converter, and controller
  • Chopper self-inspection method for wind generator converter, and controller
  • Chopper self-inspection method for wind generator converter, and controller

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Embodiment Construction

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

[0039] The invention provides a chopper self-inspection method of a fan converter to solve the problem in the prior art that the reliability of the fan converter is low due to the inability to predict whether the chopper can work normally.

[0040] The chopper self-inspection method of the fan converter is applied to the controller of the fan converter. Specifically, the chopper self-inspection method of the fan converter is as follows figure 2 shown, including:

[0041] S101. Control the...

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Abstract

The invention provides a chopper self-inspection method for a wind generator converter, and a controller. The chopper self-inspection method comprises the steps of controlling a direct current voltage loop to stop working after a starting instruction is received and after the grid side part of the wind generator converter controls a direct current bus voltage to be stable; next, controlling the grid side part of the wind generator converter to work to enable a power grid to charge the direct current side of the wind generator converter at a preset current value within a preset time so as to enable the direct current bus voltage to be greater than or equal to the switch-on voltage of the chopper; judging whether the direct current bus voltage exceeds a test protection normal range or not within a preset time in real time; and if the direct current bus voltage exceeds the test protection normal range within the preset time, controlling the wind generator converter to stop or outputting an alarming signal. Therefore, the chopper self-inspection function after startup in each time of the wind generator converter is realized, so that it is ensured that the chopper can work as normal after startup in each time of the wind generator converter; and compared with the prior art, operational reliability is improved.

Description

technical field [0001] The invention relates to the technical field of fan converters, in particular to a chopper self-inspection method and controller of the fan converter. Background technique [0002] As an intermediate mechanism connecting the wind turbine to the grid, the wind turbine converter plays the role of power transmission. When its input and output energy do not match, there will be an overvoltage condition on the DC side; and since the power electronic devices used in the wind turbine converter have a certain withstand voltage range, if the rated voltage exceeds its rated voltage, it will cause the corresponding device to fail. invalidated. Therefore, a chopper device, that is, a chopper, is generally installed on the DC side of the fan converter to discharge the DC side energy of the fan converter and prevent overvoltage conditions on the DC side, such as figure 1 shown. [0003] In the prior art, the detection of the chopper is generally carried out befor...

Claims

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Application Information

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IPC IPC(8): H02M1/00G01R31/00
CPCG01R31/00H02M1/00H02M1/0003
Inventor 杨春源王成悦汪令祥
Owner SUNGROW POWER SUPPLY CO LTD
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