Real-time on-line monitoring device for monitoring abnormal operation of switch cabinet

Abstract

The invention relates to a real-time on-line monitoring device for monitoring the abnormal operation of a switch cabinet. The device comprises a partial discharge monitor, a load current device and a temperature sensor, wherein the partial discharge monitor is arranged on the surface of a shell of the switch cabinet and is used for acquiring transient state earth electrical signals in the switch cabinet; after being converted by photoelectricity, the electrical signals are transmitted into an industrial personal computer; the load current device is arranged in the switch cabinet, is connected with a current transformer arranged in the switch cabinet, and is used for carrying out photovoltaic conversion on the numerical value of the acquired real-time load current, transmitting optical signals into the industrial personal computer and monitoring the calculated real-time current-carrying capacity of a cable; the temperature sensor is arranged at a movable contact of a circuit breaker in the switch cabinet, and is used for monitoring the contact temperature in an on-line way and sending the acquired temperature signals into the industrial personal computer. The real-time on-line monitoring device can be used for carrying out real-time comprehensive on-line monitoring on the partial discharge, the temperature change and the current-carrying capacity of the cable in the switch cabinet, and can eliminate or find failure and hidden danger in time by monitoring the safe running condition of the switch cabinet in an on-line way.

Description

technical field [0001] The present invention relates to a monitoring device, in particular to a monitoring device for on-line monitoring of partial discharge, temperature and ampacity at the same time, and transmitting the monitoring data to an industrial computer in a wired manner, so as to comprehensively monitor the safe operation of the switchgear Real-time online monitoring device for abnormal operation of switchgear. Background technique [0002] The power system undertakes the power supply task of the daily production and life of the whole society. Once a fault occurs, there will be a large-scale power outage and production stop, causing huge economic losses. The power system covers the four key links of power generation, power transmission, power distribution, and power consumption. The coordination and dispatch of each link is an important guarantee for the stability and reliability of electric energy. [0003] At present, the basic characteristics of my country's ...

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Problems solved by technology

[0009] At present, the overhaul and maintenance of switchgear equipment belongs to the method of "after-event maintenance" and "regular prevention", which may easily cause failures that cannot be solved in time, excessive maintenance or insufficient maintenance, and cause waste or untimely repair of switchgear equipment. Phenomenon

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