Online monitoring device and method for insulation characteristic of cable head

Abstract

The invention discloses an online monitoring device and method for the insulation characteristic of a cable head. The device comprises a receiving terminal and a temperature measuring module communicatively connected with the receiving terminal. The receiving terminal includes a microprocessor connected with an ambient temperature detecting module. The microprocessor collects the temperature of the outer surface of the cable head in real time through the temperature measuring module, calculates a temperature rise of the cable head, and carries out insulation characteristic determination of thecable head by combining the ambient temperature outputted by the ambient temperature detecting module and a predetermined insulating characteristic. According to the invention, the surface temperature of the cable joint is collected in real time and the insulation property of the cable head is evaluated according to the temperature rise of the cable head surface, the ambient temperature and the predetermined insulation characteristic, so that the potential safety hazard can be discovered timely and accurately and thus the fault losses are reduced.

Description

Technical field [0001] The invention relates to an online monitoring device and method for the insulation characteristics of a cable head, and belongs to the technical field of power monitoring. Background technique [0002] According to the authoritative data analysis of the power industry, 90% of the failures of the fully inflated and fully insulated switchgear are caused by poor contact at the cable connections of the incoming and outgoing cables. The main reason is that the on-site personnel did not strictly follow the cable specifications for installation. The cable cannot detect the reliability of the installation, so the contact at the installation site is unreliable, and the temperature rise of the contact part during operation exceeds the allowable range of the national regulations, which makes the cable terminal insulation aging, and discharges and causes single-phase ground faults or inter-phase short circuits. Summary of the invention [0003] The purpose of the presen...

AI Technical Summary

Problems solved by technology

[0002] According to the authoritative data analysis of the power industry, 90% of the failures of the fully inflated and fully insulated switchgear are caused by poor contact at the connection of the incoming and outgoing cables. The cable cannot detect the reliability of the installation, so the contact at the installation is unreliable, and the temperature rise of the contact part exceeds the allowable range stipulated by the state during operation, which makes the insulation of the cable terminal aging and discharges, resulting in accidents such as single-phase grounding faults or phase-to-phase short circuits.

Images