GIS fault diagnosis and reliability analysis method based on fuzzy Petri

A technology of fault diagnosis and analysis method, which is applied in the direction of instrumentation, dielectric strength testing, calculation, etc., can solve problems such as incompleteness, difficulty in network convergence, high error, etc., achieve good real-time performance and accuracy, and simple and clear knowledge representation , the effect of expanding the scope of application

Inactive Publication Date: 2015-07-08
STATE GRID CORP OF CHINA +1
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  • Abstract
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Problems solved by technology

GIS comprehensive diagnosis methods include neural network, cluster analysis, rough set, support vector machine, expert system, etc., but these research methods have certain limitations and incompleteness. The main performance is that they need complex calculations; It leads to high errors, and it will lead to difficulty in network convergence for large samples; it has defects in versatility, real-time and accuracy.

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  • GIS fault diagnosis and reliability analysis method based on fuzzy Petri
  • GIS fault diagnosis and reliability analysis method based on fuzzy Petri
  • GIS fault diagnosis and reliability analysis method based on fuzzy Petri

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Embodiment Construction

[0036] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0037] The fault diagnosis and reliability analysis method of GIS based on fuzzy Petri includes the following steps:

[0038] Step 1: Define the fuzzy Petri structure as a nine-tuple FPN:

[0039] FPN=(P,T,D,I,O,f,α,β,η)

[0040] in:

[0041] P={p 1 ,p 2 ,...,p n}, is a finite set of non-empty places, representing the set of failure events, p i It is 1 place, i=1,2,3,...,n;

[0042] T={t 1 ,t2 ,...,t m}, is a finite non-empty transition set, which represents the state change or behavior action of the fault event, reflecting the replacement of the fault propagation stage, t j is one transition, j=1,2,3,...,m;

[0043] D = {d 1 , d 2 ,...,d n}, is a finite set of propositions, d i It is a proposition, i=1,2,3,...,n,d i means p i The proposition that the represented fault event occurs;

[0044] I: P×T→{0,1}, which is an m×n in...

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Abstract

The invention discloses a GIS fault diagnosis and reliability analysis method based on fuzzy Petri. According to the method, a GIS fault modeling and inference method of a fuzzy Petri net is put forward on the basis of the randomness and diversity of GIS faults and the fuzziness of fault symptoms, the theory of the Petri net and the fuzzy inference rules are organically combined together, and the high-efficiency and accurate parallel inference capacity is achieved. Through the combination of lots of statistics fault cases, the fault diagnosis model of a GIS based on the FPN is established. When the system does not fail, matrix forward reasoning is conducted on the fault state of the GIS by online monitoring and predicting the possible fault symptoms, the credibility of all places can be rapidly and accurately calculated, and the importance degree of the initial place is analyzed; fault reasons are found through backward fuzzy inference rules under the known fault phenomenon.

Description

technical field [0001] The invention belongs to the technical field of electrical equipment detection, in particular to a method for fault diagnosis and reliability analysis of GIS based on fuzzy Petri. Background technique [0002] Gas insulated metal-enclosed switchgear GIS (gas insulated switchgear) is widely used in urban substations due to its small footprint, high reliability, good safety, long maintenance cycle, and small environmental impact. With the continuous expansion of the grid scale, the power system has higher and higher requirements for power supply reliability. According to statistics, the failure rate of GIS equipment is only 16.6% to 40% of that of conventional open equipment, but GIS failures are not easy to be found, and Once a failure occurs, it will be difficult to maintain and bring huge losses to the city's power supply. GIS faults can be roughly divided into mechanical faults, insulation faults, secondary circuit faults, body leakage faults, and o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00G01R31/12
Inventor 李凯许洪华马宏忠王春宁王涛云陈冰冰尹来宾崔杨柳刘宝稳
Owner STATE GRID CORP OF CHINA
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