Method and system for fault diagnosis of electrical equipment

A fault diagnosis system and fault diagnosis technology, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve problems such as single, inaccurate fault diagnosis, ambiguity of fault classification, etc., and achieve the effect of improving accuracy

Active Publication Date: 2013-06-12
GUANGDONG POWER GRID CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is ambiguity in fault classification. One fault state may cause multiple fault features, and one fault feature may also reflect multiple fault states to varying degrees. Using a single fault feature to diagnose a fault cannot fully reflect the fault. situation, resulting in inaccurate fault diagnosis

Method used

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  • Method and system for fault diagnosis of electrical equipment
  • Method and system for fault diagnosis of electrical equipment
  • Method and system for fault diagnosis of electrical equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] figure 1 A schematic flowchart of an embodiment of the method for diagnosing a fault in electric power equipment according to the present invention is shown in . Such as figure 1 As shown, the method in this embodiment includes steps:

[0022] Step S101: Obtain state quantity data, and determine each state quantity that is abnormal according to the state quantity data;

[0023] Step S102: According to the preset fault diagnosis model, determine the fault types associated with the abnormal state quantities. The preset fault diagnosis model includes: the relationship between the fault type and the state The failure impact weight of ;

[0024] Step S103: Carry out fault diagnosis for each associated fault type according to the fault impact weights of each abnormal state quantity on each associated fault type.

[0025] According to the solution of the embodiment of the present invention, after obtaining the state quantity data, determine the abnormal state quantities ac...

Embodiment 2

[0029] figure 2 A schematic flowchart of Embodiment 2 of the method for diagnosing a fault in electric power equipment of the present invention is shown in . In this embodiment, the main difference from the first embodiment above is that in this embodiment, the diagnosis of the possibility of each fault type is taken as an example for illustration.

[0030] Such as figure 2 As shown, the method in this embodiment includes steps:

[0031] Step S201: Obtain state quantity data, and determine each state quantity that is abnormal according to the state quantity data;

[0032] Step S202: According to the preset fault diagnosis model, determine the fault types associated with the abnormal state quantities. The preset fault diagnosis model includes: the relationship between the fault type and the state The failure impact weight of ;

[0033] Step S203: According to the fault impact weights of each abnormal state quantity on each associated fault type, perform fault diagnosis on...

Embodiment 3

[0042] image 3 A schematic flowchart of Embodiment 3 of the method for diagnosing a fault in electric power equipment according to the present invention is shown in . In this embodiment, the main difference from the first embodiment above is that in this embodiment, the diagnosis of the severity of each fault type is taken as an example for illustration.

[0043] Such as image 3 As shown, the method in this embodiment includes steps:

[0044] Step S301: Obtain state quantity data, and determine each state quantity that is abnormal according to the state quantity data;

[0045] Step S302: According to the abnormal level of the state quantity data of each abnormal state quantity, determine the deduction value of each abnormal state quantity;

[0046] Step S303: According to the preset fault diagnosis model, determine the fault types associated with each abnormal state quantity, the preset fault diagnosis model includes: the relationship between the fault type and the state T...

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Abstract

The invention relates to a method and a system for fault diagnosis of electrical equipment. The method comprises the following steps: obtaining a state parameter data and confirming each abnormal state parameter according to the state parameter data; confirming each fault class related to each abnormal state parameter according to a preset fault diagnosis model which comprises an incidence relation between the fault class and the state parameter and a fault influence weight value of each state parameter to the fault class; and performing fault diagnosis on each related fault class according to the fault influence weight value of each abnormal state parameter to the related fault class. According to the method provided by the invention, the incidence relation between each state parameter and each fault class is established, the fault class is possibly related to a plurality of state parameters, and the fault diagnosis is performed on each related fault class according to the fault influence weight value of each abnormal state parameter to the related fault class, so that the comprehensive assessment for the state of the electrical equipment is realized and the accuracy of the fault diagnosis for the electrical equipment is increased.

Description

technical field [0001] The invention relates to the field of fault diagnosis of electric power systems, in particular to a fault diagnosis method for power equipment and a fault diagnosis system for power equipment. Background technique [0002] During the operation and maintenance of equipment, electric power enterprises usually need to collect data representing the health status of the equipment and whether the equipment is faulty through various methods such as manual collection by operators, online monitoring, and preventive tests. However, in the current process of actual equipment defect diagnosis and processing, due to factors such as different professional management categories and different informatization implementation methods, the collected data cannot be effectively applied to equipment failure analysis and diagnosis. [0003] There are many kinds of equipment failures. When the failures occur, some are obvious to the operators, which are called dominant failure...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
Inventor 萧展辉刘玮钱正浩叶杰贤马敏孜蔡依晖谢敏敏林范龙
Owner GUANGDONG POWER GRID CO LTD
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