Partial discharge detection identification method based on ultrasound and ultraviolet information fusion and system thereof

Abstract

The invention discloses a partial discharge detection identification method based on ultrasound and ultraviolet information fusion. The method comprises the following steps: S1. uniformly setting sensing detection circuits in surrounding space of a detected object; S2. real-timely collecting an ultrasonic signal and an ultraviolet signal generated when partial discharge is generated in a detected area, after the signals are processed, sending to a digital signal processing circuit; S3. carrying out digital filtering processing; S4. extracting dual density wavelet transform wavelet coefficient Shannon entropy x from the ultrasonic signal generated in S3, extracting wavelet packet wavelet coefficient Shannon entropy y, and sending a characteristic vector x and a characteristic vector y to a detection system host via a communication module; S5. carrying out characteristic fusion by the detection system host so as to obtain the characteristic vector z after the fusion; S6. classifying the vector z obtained in S5 after the fusion by using support vector machine classification trees. By using the method of the invention, application of a detection identification technology based on the ultrasound and ultraviolet information fusion can be promoted; high accuracy, reliability and instantaneity of the partial discharge detection can be ensured.

Description

technical field

[0001] The invention belongs to the technical field of partial discharge detection and identification, and specifically relates to ultrasonic and ultraviolet sensing, signal processing and pattern recognition technologies, in particular to a new method for partial discharge detection and identification based on the fusion of ultrasonic and ultraviolet information, and a system. Background technique

[0002] In the process of design, manufacture, installation, operation and maintenance of power equipment, due to various reasons, the outer insulation of the wire may be damaged and cracked, resulting in local electric field concentration inside the power equipment. When the electric field intensity reaches a certain level, partial discharge may be formed, seriously affecting the normal operation of power equipment, and these partial discharge phenomena often occur inside the power equipment and are not easy to be discovered by the staff. If it is not dealt with...

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