Failure analysis and exhibition method of power generator excitation system

Abstract

The invention discloses a failure analysis and exhibition method of a power generator excitation system. The failure analysis and exhibition method comprises the following steps of: 1, on the basis of failure analysis and induction, establishing a power generator excitation system failure tree; 2, classifying failure signals of the failure tree obtained in the step 1 according to the severity orders of the failures; 3, determining the priority of signal processing according to the severity orders of the failures in accordance with the failure signal classifying in the step 2, and locating a failure source; 4, exhibiting a diagnosis result in the step 3 on the failure tree by using different modes according to different types of the failures in accordance with the correspondence of the diagnosis result in the step 3 to the failure tree of the power generation excitation system, wherein the failure tree is established in the step 1; and 5, establishing an expert knowledge base. According to the invention, the timeliness of the failure diagnosis of the power generation excitation system can be increased, abnormal information is subjected to high-level analysis, the failure source is finally located, a simple and visual failure display interface is provided for a worker, and the maintenance time can be greatly reduced.

Description

technical field [0001] The invention relates to a fault analysis and display method of a generator excitation system, belonging to the technical field of industrial control. Background technique [0002] The excitation system is an important part of the generator. The excitation system of the generator is generally composed of three main parts: the excitation regulator, the rectification unit and the de-excitation unit. The excitation regulator controls the output of the rectification unit according to the input signal and the given adjustment value; The rectifier unit provides rated excitation current to the generator rotor; the de-excitation unit can quickly cut off the excitation system when the generator fails, and quickly consume the magnetic field energy stored in the generator rotor in the de-excitation circuit. The quality of each unit of the excitation system directly affects the reliability and stability of the generator operation, so it is very important to monito...

AI Technical Summary

Problems solved by technology

At this stage, there is less monitoring information on the working status of the excitation system, and the fault display is not intuitive. In addition, after a fault occurs, the system has not carried out an in-depth analysis. Therefore, there are still certain defects in the safe, reliable and stable operation of the excitation system. , the intelligent theory has not yet been fully applied in the excitation system

If a serious accident occurs in the excitation system, but relevant measures are not taken for monitoring and protection, it may cause damage to the equipment or even trip the system

If the generator excitation system does not carry out all-round monitoring of its own state, once it trips due to a fault, the production enterprise will suffer huge economic losses and energy waste

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