Detection and positioning method for partial discharge of transformer

A technology of partial discharge detection and localization method, applied in the direction of testing dielectric strength, etc., can solve the problems of low efficiency and high cost of partial discharge localization

Active Publication Date: 2013-01-16
GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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Problems solved by technology

[0004] Based on this, it is necessary to provide a transformer partial discharge detection and location method for the existing problems of high cost and low efficiency of partial discharge location

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  • Detection and positioning method for partial discharge of transformer

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Embodiment Construction

[0011] The specific implementation of the transformer partial discharge detection and location method of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0012] figure 1 A flowchart of a method for detecting and locating transformer partial discharge according to an embodiment is shown, including the following steps:

[0013] S100, using the ultrasonic probe to detect the ultrasonic signal generated by the partial discharge point of the transformer outside the transformer oil tank;

[0014] In this step, the ultrasonic probe can be attached to the outside of the transformer oil tank (the ultrasonic probes cannot be arranged in a straight line) to receive the ultrasonic signals generated by the partial discharge point, including electrical signals and acoustic signals.

[0015] S200. Perform preprocessing on the ultrasonic signal, including analog-to-electrical conversion and analog-to-digital conversion;

[0016] In thi...

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Abstract

The invention provides a detection and positioning method for partial discharge of a transformer, which comprises the steps as follows: utilizing an ultrasonic probe to detect ultrasonic signals generated by partial discharge points of the transformer on the outer side of a transformer oil tank; preprocessing the ultrasonic signals, wherein the preprocessing comprises analog-to-electrical signal conversion processing and analog-to-digital signal conversion processing; and utilizing a hyperboloid positioning method to determine positions of the partial discharge points according to the ultrasonic signals. According to the technology of the invention, internal ultrasonic generated by the partial discharge is detected on the outer side of the transformer oil tank, and the obtained ultrasonic signals are utilized to be combined with the hyperboloid positioning method to determine the positions of the partial discharge points, so that the positioning cost is low, the efficiency is high, and the detection and positioning method can realize total digitized positioning to the partial discharge points of the transformer, and online positioning can be realized through the network.

Description

technical field [0001] The invention relates to electric power engineering technology, in particular to a transformer partial discharge detection and positioning method. Background technique [0002] In the power system, the transformer is the key equipment for power transmission in large urban power grids, and the performance of the transformer directly affects the safe operation of the power system. The detection and location of partial discharge in transformers is an important means for power system transformer related technology research, operation defect detection, and condition-based maintenance. [0003] At present, the detection and positioning technology for partial discharge of transformers is generally based on the positioning technology based on physical equipment. Due to the use of physical equipment, a large amount of site facilities are required, and physical equipment is required. The cost of partial discharge positioning is high, and it is necessary to go to...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12
Inventor 王勇熊俊易满成刘广辉陈俊方健王志军黄青丹敖昌民
Owner GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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