Construction method of partial discharge diagnosis system of switch cabinet based on multi-information fusion

Abstract

The invention discloses a construction method of a partial discharge diagnosis system of a switch cabinet based on multi-information fusion. The method mainly comprises the steps of: S1, establishinga test platform of a switch cabinet, and simulating typical defects of metal protrusions, air gaps, metal suspensions and insulated internal discharge of the switch cabinet by employing an artificialdefect simulation technology; S2, performing comprehensive detection of the typical defects of the switch cabinet by employing the transient ground voltage method, the ultrasonic method and the ultra-high frequency method to obtain the characteristics of the partial discharge signals; S3, after feature extraction processing of the feature information, transmitting the feature information to the elementary probability distribution BPA of a DS fusion block for finishing; and S4, employing the DS evidence theory to perform fusion of the finished information to obtain an identification system. Through the extraction of the multi-information features, the principal component selection and the defect identification, the feature set is optimized to simplify the calculation model; through the evidence theory, the multi-detection method information and the multi-identification system information are fused to establish a multi-source information comprehensive identification system so as to improve the measurement precision.

Description

technical field [0001] The invention relates to a diagnosis system, in particular to a construction method of a switch cabinet partial discharge diagnosis system based on multi-information fusion. Background technique [0002] In order to be able to accurately identify and evaluate the internal insulation faults of the switchgear, it is the basic need to ensure the safety and economic operation of the switchgear, and it is also the necessary basis for the realization of the condition-based maintenance and non-power-off maintenance of the switchgear. Multi-information (ground wave, ultrasonic, UHF) fusion monitoring is the development trend of switchgear condition monitoring. Using multi-source information fusion to accurately identify and evaluate the internal insulation faults of switchgear has important engineering applications. value. Therefore, it has become an important subject to establish a construction method of a switchgear partial discharge diagnosis system based ...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: the traditional switchgear partial discharge detection often uses a single technology, due to the interference of the on-site electromagnetic environment, and the lack of deep understanding of the discharge discharge mechanism, development process and discharge physical phenomenon by field test personnel, Even if there are insulation defects in the equipment, it is still difficult for the test personnel to detect and find the defects in the switch cabinet, which will lead to the further development of the defects of the switch cabinet, and eventually lead to the occurrence of power outages. The present invention provides a solution based on multi-information fusion to solve the above problems Construction method of switchgear partial discharge diagnosis system

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