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Transformer partial discharge detection method

A partial discharge detection and partial discharge detection technology, applied in the direction of testing dielectric strength, etc., can solve the problems of unsatisfactory field application, poor anti-interference ability, difficult to respond in time, etc., to achieve high detection timeliness and anti-interference performance. strong effect

Inactive Publication Date: 2018-03-06
STATE GRID CORP OF CHINA +2
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Problems solved by technology

However, oil and gas analysis requires a long-term monitoring process, and it is more sensitive to discover latent faults that develop slowly, but it is usually difficult to respond in time to sudden faults
However, the pulse current method is easily affected by external interference, and its anti-interference ability is poor, so the field application has been unsatisfactory.

Method used

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Embodiment Construction

[0009] A transformer partial discharge detection method, characterized in that, by using an ultrasonic emission partial discharge detection system, a UHF partial discharge monitoring system and a microprocessor, multiple groups of partial discharge detections are performed on the same transformer at different positions, and the microprocessor After analysis and processing, the test results can be clearly viewed, and the two test results are mutually verified. The ultrasonic emission partial discharge detection system includes an ultrasonic detection sensor and an ultrasonic detection sensing signal conversion circuit and an ultrasonic detection sensing signal amplifying circuit connected thereto. The UHF partial discharge monitoring system includes a UHF detection sensor, a UHF detection sensor conversion circuit and a UHF detection sensor conversion signal amplification circuit connected thereto.

[0010] When this method is used, a single sensor can be used for partial disch...

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Abstract

The invention discloses a transformer partial discharge detection method. Multiple sets of partial discharge detection is performed on the same transformer at different positions by using an ultrasonic transmitting partial discharge detection system, an ultrahigh frequency partial discharge monitoring system and a microprocessor, the detection result can be clearly viewed through analysis and processing of the microprocessor and the two test results verify each other. The advantages of the method are that two sets of partial discharge detection systems are integrated and have complementary advantages, and the two test results verify each other so that the method has high anti-interference performance and high detection timeliness.

Description

technical field [0001] The invention relates to a partial discharge detection technology for power equipment, in particular to a detection method for intensive care partial discharge detection equipment used in power plants and substation GIS and transformers, in particular to a partial discharge detection method for transformers. Background technique [0002] At present, domestic transformer online monitoring mainly adopts oil and gas analysis DGA (Dissolved Gas Analysis) method and pulse current method. However, oil and gas analysis requires a long-term monitoring process. It is sensitive to discover latent faults that develop slowly, but it is usually difficult to respond in time to sudden faults. However, the pulse current method is easily affected by external interference and has poor anti-interference ability, so the field application has been unsatisfactory. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12
Inventor 于辉叶飞周明振孙世广王书华黄剑煌王东
Owner STATE GRID CORP OF CHINA
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