Switch cabinet tulip contact pressure on-line monitoring and failure assessment method and switch cabinet tulip contact pressure on-line monitoring and failure assessment system

By combining a flexible thin-film pressure-sensitive array sensor and a wireless temperature sensor with a temperature-pressure compensation model and KNN regression intelligent diagnosis, the problems of temperature influence and structural adaptability in online monitoring of plum blossom contact pressure have been solved. This enables real-time and accurate assessment of contact status and early warning, thereby improving the intelligence of the power grid and the reliability of power supply.

CN122084259APending Publication Date: 2026-05-26STATE GRID TIANJIN ELECTRIC POWER COMPANY +1
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Patent Information

Application Number
CN202610550234.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-24
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing technologies cannot achieve real-time online monitoring of plum blossom contact pressure. Temperature changes affect measurement accuracy, sensor design is not adapted to the curved surface structure of the contact, installation affects electrical insulation performance, and there is a lack of unified evaluation standards, making it difficult to achieve early fault warning.

Method used

Real-time data acquisition is achieved using a flexible thin-film pressure-sensitive array sensor and a wireless temperature sensor. Temperature interference is eliminated through a temperature-pressure compensation model, and a KNN regression intelligent diagnostic model is constructed for health status assessment. A comprehensive three-dimensional index H is used for graded early warning.

Benefits of technology

It enables real-time and accurate monitoring of plum blossom contact pressure, eliminates the influence of temperature, improves measurement accuracy, can identify mechanical fatigue and elastic decay at an early stage, realizes precise classification and early warning of contact status, and improves the intelligence level of the power grid and the reliability of power supply.

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Abstract

The invention belongs to the technical field of power equipment state monitoring and fault diagnosis, and discloses a switch cabinet tulip contact pressure on-line monitoring and failure assessment method and a switch cabinet tulip contact pressure on-line monitoring and failure assessment system. The method comprises the following steps: acquiring temperature data and original pressure data of the tulip contact in real time; performing temperature compensation on the original pressure data based on a temperature-pressure compensation model to obtain compensation pressure data; and inputting the compensation pressure data into the KNN regression intelligent diagnosis model, calculating a comprehensive three-dimensional index H and judging a health state grade. The system comprises a sensing unit, a data transmission unit and a monitoring and evaluating unit. Interference of temperature on pressure measurement is eliminated through temperature compensation, accurate grading and early warning of the health state of the tulip contact are achieved in combination with multi-sensor three-dimensional pressure sensing and the KNN regression model, and the accuracy and reliability of online monitoring are improved.
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