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Method and system for detecting and verifying partial discharge of power transformer through ultrasonic sensors

An ultrasonic sensor and power transformer technology, which is applied in the field of ultrasonic sensor detection and calibration, achieves the effects of high repeatability of ultrasonic sources, intuitive comparison and judgment, and stable characteristics.

Active Publication Date: 2013-10-09
STATE GRID CORP OF CHINA +1
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Problems solved by technology

[0005] At present, there is no calibration standard for ultrasonic sensors for partial discharge localization of power transformers in China, so it is particularly important to provide a detection and calibration method and system for partial discharge ultrasonic sensors of power transformers

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  • Method and system for detecting and verifying partial discharge of power transformer through ultrasonic sensors
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  • Method and system for detecting and verifying partial discharge of power transformer through ultrasonic sensors

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Embodiment Construction

[0047] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0048] The steps of a method for detecting and verifying a partial discharge ultrasonic sensor of a power transformer provided by the present invention are as follows: A. performing longitudinal wave detection on the ultrasonic sensor; B. performing partial discharge detection on the power transformer by the ultrasonic sensor; C. The ultrasonic sensor performs positioning detection on the partial discharge;

[0049] I: (1) When performing longitudinal wave detection on the ultrasonic sensor, the transient recorder separately collects the voltage transient change value output by the ultrasonic sensor to be tested and the standard ultrasonic sensor after measuring the waveform of the same longitudinal wave sound source;

[0050] (2) Perform fast Fourier transform processing on...

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Abstract

The invention provides a method and system for detecting and verifying partial discharge of a power transformer through ultrasonic sensors. The method for detecting and verifying the partial discharge of the power transformer through the ultrasonic sensors includes the steps that A longitudinal wave detection is carried out on the ultrasonic sensors, B the ultrasonic sensors carry out partial discharge detection on the power transformer, and C the ultrasonic sensors carry out positioning detection on the partial discharge. The system for detecting and verifying the partial discharge of the power transformer through the ultrasonic sensors includes an ultrasonic sensor longitudinal wave detection system, an ultrasonic sensor power transformer partial discharge detection system and an ultrasonic sensor power transformer partial discharge positioning detection system. Compared with the prior art, the method and system for detecting and verifying the partial discharge of the power transformer through the ultrasonic sensors achieves the performance evaluation of the power transformer partial discharge and positioning detection accurately, simply and conveniently through the different sensors.

Description

technical field [0001] The invention relates to a detection and verification method and system for an ultrasonic sensor, in particular to a detection and verification method and system for a partial discharge ultrasonic sensor of a power transformer. Background technique [0002] The power transformer is one of the important equipment in the power system, and its safe operation is of great significance; in the field operation, the partial discharge of the power transformer is one of the important reasons leading to the deterioration of the insulation of the power transformer. However, the accurate positioning of partial discharge sources inside large power transformers has always been a difficult problem in the field of high-voltage equipment insulation detection; various countries have carried out a lot of research work on the mechanism of partial discharge in transformers, and made great progress. Localization methods for partial discharge sources inside power transformers...

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Application Information

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IPC IPC(8): G01R35/00
Inventor 邱进陈江波吴世普张曦李辉徐思恩许晶杜砚何妍冯宇汪本进郭慧浩周翠娟朱丝丝黄琴
Owner STATE GRID CORP OF CHINA
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