Partial discharge detection and analytic diagnosis system for GIS cable terminal

Abstract

The invention discloses a partial discharge detection and analytic diagnosis system for a GIS cable terminal. The system comprises an ultrasonic sensor, an ultrahigh-frequency sensor, a high-frequencypulse current sensor, a data acquisition unit, a data storage server and an analytic diagnosis platform, wherein the ultrasonic sensor and the ultrahigh-frequency sensor are installed on a tail tubeof the GIS cable terminal, the high-frequency pulse current sensor is installed on a grounding wire of the GIS cable terminal, the ultrasonic sensor, the ultrahigh-frequency sensor and the high-frequency pulse current sensor are connected with the data acquisition unit separately, the data acquisition unit is connected with the data storage server, and the data storage server is connected with theanalytic diagnosis platform. By adopting three different detection methods to perform long-term partial discharge online monitoring on the GIS cable terminal, the problem of large on-site interference can be effectively solved, and the accuracy of analytic diagnosis of partial discharge signals can be improved.

Description

technical field [0001] The invention relates to the technical field of partial discharge detection of electric power equipment, in particular to a GIS cable terminal partial discharge detection and analysis diagnosis system. Background technique [0002] Partial discharge is the main manifestation of insulation defects in GIS, switch cabinets, cables and other high-voltage electrical equipment, and the further development of partial discharge is the main cause of insulation failure of power equipment. Statistics show that nearly 85% of power equipment accidents are caused by partial discharge. Partial discharge detection is an effective method to quantitatively analyze the insulation degradation process, so it is of great significance to carry out partial discharge detection on GIS cable terminals. [0003] Due to the weak partial discharge signal of high-voltage cables, under the influence of field noise and external electromagnetic interference, it is difficult to detect ...

AI Technical Summary

Problems solved by technology

A single detection method cannot effectively and comprehensively discover the partial discharge signal inside the GIS cable terminal, and the analysis and diagnosis of the partial discharge signal requires extremely high on-site testing experience of the inspectors. Sometimes even if the signal is found on the spot, the partial discharge signal cannot be accurately judged. severity

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