Medium- and high-voltage switch cabinet temperature on-line monitoring device

Abstract

The invention relates to the field of switch cabinet monitoring. The invention discloses a medium- and high-voltage switch cabinet temperature on-line monitoring device, including a temperature measurement host, a remote monitoring end, an alarm module and sensor nodes. The sensor nodes monitor temperature of points to be measured in a switch cabinet and wirelessly transmit sensing signals to the temperature measurement host, the temperature measurement host processes the sensing signals to convert into a temperature value, the temperature value is compared with a preset value, when overtemperature occurs, an alarm signal is output to the alarm module to give an alarm, and at the same time, the temperature value and fault information are transmitted to the remote monitoring end through wired communication, so that remote monitoring is performed. The medium- and high-voltage switch cabinet temperature on-line monitoring device can realize on-line monitoring of medium- and high-voltage switch cabinet temperature, so as to perform real-time monitoring of the medium- and high-voltage switch cabinet temperature, prevent a power supply accident from being caused by overtemperature, and reduce loss caused by accidents, and is low in power consumption, convenient to install, good in expansibility and low in cost, and in addition, can greatly reduce the workload of inspection personnel, thereby reducing potential personal danger.

Description

technical field [0001] The invention belongs to the field of switch cabinet monitoring, and in particular relates to an on-line temperature monitoring device for medium and high voltage switch cabinets. Background technique [0002] In order to ensure the safe production of power equipment and improve the reliability of equipment operation, it is necessary to monitor the temperature of the overheated part of the switchgear on-line to achieve an alarm when the temperature exceeds the limit. At present, many domestic power generation companies and power companies have experienced abnormal temperature changes in substation switchgears, closed busbars, disconnectors, cable heads and other equipment due to insulation aging or poor contact to varying degrees, thereby causing power supply accidents. Since these devices are high-voltage live devices and the hot spots of some devices are inconvenient to detect, in order to solve this problem, traditionally, thermal imaging cameras or...

AI Technical Summary

Problems solved by technology

At present, many domestic power generation companies and electric power companies have experienced abnormal temperature changes in substation switch cabinets, closed busbars, disconnectors, cable heads and other equipment due to insulation aging or poor contact, which in turn lead to power supply accidents.

Since these devices are high-voltage live devices and the hot spots of some devices are inconvenient to detect, in order to solve this problem, traditionally, thermal imaging cameras or spot thermometers are mainly used to conduct regular inspections on the equipment, while thermal imaging cameras can only detect the current situation , it is impossible to realize online monitoring, and it is impossible to preview the future situation and report to the police in time; in addition, the sense of responsibility of the inspectors and the time interval of inspection during the inspection process are also prominent problems

As a result, many equipment defects cannot be discovered in time, and are often not discovered until the defects expand and cause equipment damage. In addition, because the switchgear has high voltage and most of them are placed in remote places in the field, inspection personnel may encounter problems during the inspection process. personal danger

[0003] Now there are also some online monitoring devices, such as the open patent: CN105092083A, although online monitoring can be realized, but because it uses a wired method for data transmission, the installation and wiring are troublesome, the scalability is poor, the power consumption is large, and the lines may affect the electrical equipment of the switch cabinet. Influence, low security

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