Switch cabinet partial discharge monitoring system, method, equipment and medium

By combining the NO2 sensor and the transient current method monitoring system, high-precision and reliable online monitoring of partial discharge in high-voltage switchgear is achieved, solving the problems of low sensitivity and poor anti-interference of the monitoring system in the existing technology, reducing operation and maintenance costs, and improving the safety and reliability of the power system.

CN120703528APending Publication Date: 2025-09-26GUIZHOU POWER GRID CO LTD
0 Cites 2 Cited by

Patent Information

Application Number
CN202510766475.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-06-10
Publication Date
2025-09-26

AI Technical Summary

Technical Problem

The existing technology for partial discharge monitoring of high-voltage switchgear has problems such as high cost, low sensitivity, poor anti-interference and inability to perform long-term online stable monitoring, making it difficult to achieve high-precision and stable monitoring of the insulation status.

Method used

The monitoring system combines NO2 sensor with transient current method, including NO2 gas detection module, pulse current signal acquisition module, signal processing module, data transmission module, data analysis and diagnosis module, and user display and alarm module. It obtains high-frequency pulse signals through capacitive coupling sensor, combines with high-frequency filter circuit to filter out low-frequency interference, and uses FFT spectrum analysis and NO2 gas concentration verification to achieve dual-verification partial discharge fault judgment.

Benefits of technology

It improves the monitoring accuracy and stability of partial discharge of high-voltage switchgear, enhances the anti-interference ability, reduces the false alarm rate, reduces operation and maintenance costs, and improves the safety and reliability of the power system.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention discloses a partial discharge monitoring system, method, equipment and medium for a switch cabinet, and belongs to the technical field of insulation state monitoring of high-voltage electrical equipment, and the partial discharge monitoring system comprises an NO2 gas detection module, a pulse current signal acquisition module, a signal processing module, a data transmission module, a data analysis and diagnosis module and a user display and alarm module. According to the invention, by integrating dual monitoring technologies of NO2 gas detection and transient current signal acquisition and combining signal processing, data transmission, data analysis and diagnosis and a user display and alarm module, high-precision and high-reliability online monitoring of partial discharge of the high-voltage switch cabinet is realized; the defects that a traditional single method is prone to electromagnetic interference, low in sensitivity and not suitable for long-term online monitoring are overcome, and the anti-interference capacity, diagnosis accuracy and operation stability of a monitoring system are improved.
Need to check novelty before this filing date? Find Prior Art