Fault rate statistical method and system for a wind turbine generator

Abstract

The invention provides a fault rate statistical method and system for a wind turbine generator. The method comprises the following steps: according to a pre-established fault tree model of a wind turbine generator, carrying out qualitative analysis on faults of the wind turbine generator to obtain a minimum cut set of a fault tree; Acquiring fault time sequence information of the wind turbine generator; according to the fault time sequence information, establishing a fault distribution function model by referring to a minimum cut set of a fault tree model; and calculating the top event probability, the probability importance degree, the structure importance degree and the key importance degree of the wind turbine generator fault according to the fault distribution function model of the wind turbine generator. According to the fault rate statistical method and system for the wind turbine generator, an effective means for quantitative analysis is provided for the fault rate of the wind turbine generator, and effective technical support is provided for improving the fault handling capacity of on-site maintenance personnel.

Description

technical field [0001] The present invention relates to the technical field of fault diagnosis, in particular to a method and system for statistics of the fault rate of wind turbines. Background technique [0002] According to the survey results of fault diagnosis and maintenance status of wind turbines, there are currently two main problems: on the one hand, the logical relationship of the cause of the fault is not clear, which makes it difficult to locate the cause after the fault occurs; on the other hand, the on-site maintenance personnel have different fault handling capabilities. Qi, resulting in long maintenance and overhaul time. [0003] To meet the development needs of the wind power industry, the capacity of wind turbines is becoming larger and larger. How to reduce equipment manufacturing costs and improve the utilization efficiency of wind energy is a key concern of wind power machine manufacturers. The failure rate of wind turbines in my country is generally h...

AI Technical Summary

Problems solved by technology

[0002] According to the survey results of fault diagnosis and maintenance status of wind turbines, there are currently two main problems: on the one hand, the logical relationship of the cause of the fault is not clear, which makes it difficult to locate the cause after the fault occurs; on the other hand, the on-site maintenance personnel have different fault handling capabilities. neat, resulting in long maintenance and overhaul time

The failure rate of wind turbines in my country is generally higher than that of other power generation equipment. As more and more units are put into operation, more and more unit failures are exposed. A series of problems such as long judgment and repair time, low availability, and equivalent annual operation time of rated power farther than 2000 hours have seriously restricted the healthy development of the wind power industry

Images