Fault tree-based coal mine underground combination switch fault diagnosis method

Abstract

The invention provides a fault tree-based coal mine underground combination switch fault diagnosis method, which is implemented by a combination switch control system, wherein the combination switch control system comprises a central controller, a loop comprehensive protector and a man-machine interface. The fault tree-based coal mine underground combination switch fault diagnosis method comprisesthe steps of: establishing a fault tree rule; determining top events, middle events and bottom events according to rules and according to expert experience, case summary and combination switch principle analysis, and establishing a fault tree; triggering a diagnosis mechanism by the central controller according to an occurred fault phenomenon, and quickly obtaining a minimum cut set of the faulttree by utilizing a mutual exclusion rule of process nodes at the same layer; solving the importance of each bottom event in the minimum cut set, and outputting diagnosis results according to the order of the importance; and determining a fault reason according to the bottom event corresponding to the diagnosis result, and adding one to the accumulated times of the bottom event corresponding to the fault reason for calculating a dynamic correction score of the bottom event next time. Through adoption of the fault tree-based coal mine underground combination switch fault diagnosis method, the fault position of the combination switch can be rapidly judged, and the fault can be conveniently and rapidly eliminated.

Description

technical field [0001] The invention relates to the field of state monitoring of mine power supply equipment, in particular to a method for diagnosing a fault of a coal mine underground combination switch based on a fault tree. Background technique [0002] In the power supply system of the fully mechanized mining face, the combination switch is used as the power supply hub of the three machines in the working face. It has many sampling control links and a high degree of automation. It is difficult to maintain after a fault, and requires operators with high professionalism. Therefore, according to the state characteristics and failure mechanism of the combination switch, after the combination switch fails, the diagnostic analysis and output of the faulty parts and lines will help operators quickly eliminate equipment failures and improve mine production efficiency. [0003] Usually, the self-diagnosis methods of the coal mine combination switch mainly include the following t...

AI Technical Summary

Problems solved by technology

[0007] The above types of fault diagnosis methods are limited to the monitoring and diagnosis of the local position of the combination switch. The diagnostic range is small, and it is difficult to cover other prone fault points such as fuses, lines, input and output interfaces. After the combination switch fails, it cannot be quickly located and eliminated.

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