Fault diagnosis device and method for wind power converter

Abstract

The invention provides a fault diagnosis device and method for a wind power current converter, and the device comprises a fault collection module which is used for obtaining a fault signal of the wind power current converter; a time sequence generation module which is used for adding a time sequence to the fault signal obtained by the fault collection module; an expert database module which is used for carrying out the fault diagnosis of the fault signal with the time sequence. The device and method can reduce or avoid the shortcomings caused by the judgment of a maintainer through experience. The device and method can sequentially analyze the fault signals according to the time sequence, so as to diagnose the fault and find the cause of the fault more accurately. The device and method can select out a representative fault signal for analysis at first according to the time sequence, thereby quickly finding out the cause of the fault.

Description

technical field [0001] The present invention generally relates to the technical field of wind power converters, and more specifically relates to a fault diagnosis device and a fault diagnosis method for wind power converters. Background technique [0002] Wind power converters are generally controlled by distributed controllers or centralized controllers. Whenever a wind power converter fails and shuts down, the distributed controller or centralized controller will obtain multiple fault signals from multiple components of the wind power converter. [0003] In order to diagnose a fault and perform corresponding treatment, maintenance personnel need to diagnose the cause and / or type of the fault based on experience. However, the fault signal will be different due to the different wind power converters and the different components of the wind power converter from which the fault signal originates, and the experience level of different maintenance personnel is also different, w...

AI Technical Summary

Problems solved by technology

However, the fault signal will be different due to the different wind power converters and the different components of the wind power converter from which the fault signal originates, and the experience level of different maintenance personnel is also different, which brings great challenges to fault diagnosis and fault handling. Difficulty

[0004] In addition, there is no obvious logical relationship among the multiple fault signals, and it is easy to make wrong judgments when considering each fault signal separately, which also brings difficulties to fault diagnosis and fault handling

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