Fault diagnosis method of oil-immersed power equipment by combining fuzzy theory and improving genetic algorithm

An improved genetic algorithm and fault diagnosis technology, applied in the field of fault diagnosis of oil-immersed power equipment, can solve problems such as wrong judgment of coded values

Inactive Publication Date: 2010-12-08
XI AN JIAOTONG UNIV +2
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Problems solved by technology

Since the judgment of the coded value is strictly in accordance with the exact value, but the severity of the fault is a gradual process, the judgment of the coded value is strictly in accordance with the exact value, which may easily lead to a wrong judgment of the coded value

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  • Fault diagnosis method of oil-immersed power equipment by combining fuzzy theory and improving genetic algorithm
  • Fault diagnosis method of oil-immersed power equipment by combining fuzzy theory and improving genetic algorithm
  • Fault diagnosis method of oil-immersed power equipment by combining fuzzy theory and improving genetic algorithm

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Embodiment Construction

[0036] The present invention will be further described in detail below in conjunction with the accompanying drawings, the principle of the technical solution and the embodiments of the invention.

[0037] (1) The overall idea of ​​the technical plan

[0038] The core proposition solved by the present invention is to improve the boundary conditions and coding of the IEC three-ratio method by applying genetic algorithm and fuzzy theory, improve the accuracy of fault diagnosis, and further improve the accuracy of fault diagnosis of oil-immersed power equipment, thereby improving the operation of the equipment reliability. The present invention adopts the improved IEC three-ratio method, especially in combination with fuzzy theory and improved genetic algorithm, performs fuzzy processing on the gas ratio parameter boundary and fault coding of the improved IEC three-ratio method, and obtains the fault diagnosis result through fuzzy reasoning, thereby: ① solves the problem The faul...

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Abstract

The invention belongs to the field of fault diagnosis methods of oil-immersed power equipment and discloses a fault diagnosis method of oil-immersed power equipment by combining a fuzzy theory and improving a genetic algorithm. Aiming to a common improved IEC three-ratio method, by combining the fuzzy theory and improving the genetic algorithm, the method realizes treatment on other gas ratio boundaries and fault codes through fuzzy treatment and obtains a fault diagnosis result through a fuzzy inference. For carrying out fuzzy treatment on the boundary values of the improved IEC three-ratio method by adopting the fuzzy theory, the invention solves the problem of poor fault diagnosis accuracy caused by too absolute code boundary condition of the improved IEC three-ratio method and takes a certain action of improving the diagnosis accuracy of the improved IEC three-ratio method. The invention adopts the genetic algorithm for self-adaptive regulating mutation probability to revise an experience fuzzy membership function to obtain an optimal parameter of the fuzzy membership function and lays a good foundation of application of the fuzzy theory in improving the IEC three-ratio method.

Description

technical field [0001] The invention belongs to the field of fault diagnosis methods for oil-immersed electric equipment, in particular to a fault diagnosis method for oil-immersed electric equipment combined with fuzzy theory and improved genetic algorithm. Background technique [0002] Oil-immersed power equipment (such as power transformers, oil-immersed transformers) is an important equipment in the power system. Doing a good job in its operation and maintenance, especially fault diagnosis, is of great importance for improving the safe and reliable operation of the power system and the reliable monitoring of electric energy. Significance. For the fault diagnosis of oil-immersed power equipment, the analysis method of dissolved gas in oil is a very effective method. When the oil-immersed power equipment has a sign of failure or fails, some gases will be decomposed in the transformer oil used in the equipment, and the composition and content of these gases can be detected...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00G06N3/12
CPCG01N33/2841
Inventor 荣命哲龚东武白凡吴洪艳刘朝伟周姝昱王小华
Owner XI AN JIAOTONG UNIV
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