Online abnormity monitor of high tension switchgear

Abstract

The invention relates to an online abnormity monitor of a high tension switchgear. The monitor comprises multiple temperature detection modules which are mounted in the switchgear body in one to one correspondence with cable termination joints, the signal output ends of the temperature detection modules are electrically connected to a single-chip microcomputer, the single-chip microcomputer is also electrically connected with an alarm bell module, an alarm lamp module, a GSM module and a display module, and the display module is mounted at the outer wall of the switchgear body. An alarm device comprises a smog detection module which is mounted in the switchgear body and electrically connected with the single-chip microcomputer as well as an image collection which is mounted in the switchgear body and electrically connected with the single-chip microcomputer. The monitor has the advantages of simple structure, convenient use and comprehensive and reliable monitoring.

Description

technical field [0001] The invention relates to an abnormal online monitoring device for a high-voltage switch cabinet. Background technique [0002] With the rapid development of social economy, the demand for electric power is increasing, and users have higher and higher requirements for power supply reliability. Correspondingly, higher requirements are put forward for the safety and stability of high-voltage switchgear in substations. Require. [0003] Key parts such as switch contacts, busbar transition points, and cable terminal joints in the high-voltage switchgear are prone to high temperature phenomena during long-term operation, which affects the safe operation of equipment. The study found that when the joints at the inlet and outlet cables of the high-voltage switchgear have poor contact, poor manufacturing technology, unqualified materials, and excessive loads, the cable terminal joints will experience high temperatures. If hidden dangers cannot be detected and...

AI Technical Summary

Problems solved by technology

The thermistor method measures temperature, the thermistor is easy to damage and requires a lot of maintenance; the temperature display wax film method can judge the approximate temperature of the temperature measurement point according to the melting of the wax film, but the temperature measurement accuracy of this method is low and reliable. Poor performance; the infrared temperature measurement method is a non-contact temperature measurement, which is not easy to damage the device, but most of the high-voltage switchgear is a closed structure, which cannot penetrate the metal cabinet door to measure the temperature inside

Due to the mechanical lock and electrical lock of the metal door of the switch cabinet, the metal cabinet door can only be opened for measurement when the equipment is powered off and the grounding switch is closed. This obviously increases the number of power outages and power outage time, and complicates the temperature measurement workflow.

In addition, the use of the above temperature measurement methods cannot guarantee that the operation and maintenance personnel will discover the high temperature phenomenon of the equipment in time.

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