Converter fault diagnosis method and converter fault diagnosis device

Abstract

The invention discloses a converter fault diagnosis method and converter fault diagnosis device. The converter fault diagnosis method comprises the following steps that: S1, fault data are acquired, and fault causes matched with the fault data are searched out; S2, if more than one fault cause exists, the method enters step S3, otherwise, the fault cause is adopted as a final diagnosis cause, and the method enters step S6; S3, a converter is controlled to enter a test mode, and test fault causes matched with test fault data emitted by the converter are searched out according to the test fault data; S4, the intersection of the fault causes and the test fault causes is calculated; if more than one cause exist in the intersection, the method enters step S5, otherwise, the intersection is adopted as a final diagnosis cause, and the method enters step S6; and S5, one of the plurality of causes in the intersection, which has a larger statistic occurrence probability, is adopted as a final diagnosis cause. Compared with the prior art, the converter fault diagnosis method of the invention can diagnose the fault of the converter and reduce the maintenance time of the wind power converter.

Description

technical field [0001] The invention relates to a converter fault diagnosis method and a converter fault diagnosis device. Background technique [0002] As a clean and renewable energy, wind energy has been paid more and more attention by countries all over the world. Wind power generation is to convert the kinetic energy of the wind into electrical energy, and the wind power converter is the core component of the wind power system. Once the wind power converter fails, the wind power system will not be able to convert wind energy into electricity. Therefore, it is very important to quickly diagnose the faults of wind power converters. The current diagnosis method is to rely on after-sales engineers to analyze the fault code and fault data, and then give a solution to the fault. This diagnosis method of wind power converter not only wastes manpower, but also is limited by the ability and experience of engineers. [0003] In view of the above problems, it is necessary to p...

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Problems solved by technology

This diagnosis method of wind power converter not only wastes manpower, but also is limited by the ability and experience of engineers

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