Tap switch defect online monitoring method based on acousto-optic joint detection method

By adopting a combined acousto-optical detection method on the power transformer and combining ultrasonic waves and optical signals, the precise diagnosis and positioning of tap-off discharge faults is achieved, which solves the problem of inaccurate detection in the existing technology and improves the safety and reliability of equipment operation.

CN119716528APending Publication Date: 2025-03-28POWER RES INST OF STATE GRID SHAANXI ELECTRIC POWER CO LTD +1
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Patent Information

Application Number
CN202411941276.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-26
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

The prior art is difficult to effectively detect and locate the discharge fault of the tap switch of the power transformer, resulting in inaccurate fault diagnosis and affecting the judgment of the equipment status.

Method used

The online monitoring method based on the combined acousto-optical detection method is adopted. By installing ultrasonic sensors in multiple locations of the transformer and installing optical probes inside the fuel tank, the ultrasonic and optical signals generated by the discharge are captured, and real-time analysis and positioning are performed through the data processing system.

Benefits of technology

It improves the sensitivity and reliability of detection, enhances the positioning accuracy of the discharge position, and can promptly detect and deal with the on-load voltage regulator switch fault of the transformer, ensures the safe and stable operation of the equipment, and reduces operating risks and maintenance costs.

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Abstract

The invention relates to the technical field of power equipment monitoring, and discloses a tapping switch defect on-line monitoring method based on an acousto-optic joint detection method, ultrasonic sensors are installed at a plurality of positions of a power transformer and used for receiving ultrasonic signals generated by discharging, and optical probes are installed at proper positions in a transformer oil tank and used for detecting the defects of the tapping switch. According to the power transformer on-load tap changer discharge detection method, an acoustic-optical combined detection means is adopted, whether the on-load tap changer discharges or not can be accurately judged, and the detection accuracy is improved. And then a triangulation positioning algorithm is combined with comprehensive analysis of optical signals in an auxiliary manner, so that the positioning accuracy of the discharge position can be effectively improved, the fault of the transformer on-load tap changer can be found in time, safe and stable operation of the power transformer can be ensured, and the operation risk and maintenance cost of a power system can be reduced.
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