Intelligentized switch cabinet monitoring system and method

Abstract

The invention provides an intelligentized switch cabinet monitoring system. The intelligentized switch cabinet monitoring system comprises a linear displacement sensor, a magnetic balance type hall current voltage sensor, an infrared video monitoring device, an acoustic surface wave temperature measuring device, an insulation monitoring device and a control system; the linear displacement sensor is connected with a movable contact insulating pull rod of a circuit breaker, the magnetic balance type hall current voltage sensor is connected with an opening and closing coil circuit of the circuit breaker, the infrared video monitoring device, the acoustic surface wave temperature measuring device and the insulation monitoring device are all arranged in the switch cabinet, the linear displacement sensor, the magnetic balance type hall current voltage sensor, the infrared video monitoring device, the acoustic surface wave temperature measuring device and the insulation monitoring device are all connected with the control system. The invention further provides an intelligentized switch cabinet monitoring method. According to the system and the method, the mechanical characteristic parameter of the circuit breaker in the switch cabinet, data of real-time image, temperature, insulation and the like of main devices in the switch cabinet can be accurately acquired in an online manner, and the control system can give an alarm in time when abnormal conditions are discovered.

Description

technical field [0001] The invention relates to an intelligent switch cabinet monitoring system and an intelligent switch cabinet monitoring method. Background technique [0002] At present, the traditional medium-voltage switchgear used in the power grid is not highly intelligent. Even if a small part of the switchgear is equipped with a measurement and control device, it can only realize the position status of the switchgear, current and voltage measurement, but not the mechanical characteristics of the switch. Insulation monitoring, temperature monitoring, video monitoring and other functions, for the hidden dangers and new faults of the switchgear such as insulation reduction, only regular human detection methods can be used. This method can neither predict the status of the equipment in real time, but also waste a lot of labor. There are certain limitations to the development of smart grid. [0003] Traditional sensors for measuring the travel of circuit breakers are m...

AI Technical Summary

Problems solved by technology

[0002] At present, the traditional medium-voltage switchgear used in the power grid is not highly intelligent. Even if a small part of the switchgear is equipped with a measurement and control device, it can only realize the position status of the switchgear, current and voltage measurement, but not the mechanical characteristics of the switch. Insulation monitoring, temperature monitoring, video monitoring and other functions, for the hidden dangers and new faults of the switchgear such as insulation reduction, only regular human detection methods can be used. This method can neither predict the status of the equipment in real time, but also waste a lot of labor. There are certain limitations to the development of smart grid

[0003] Traditional sensors for measuring the travel of circuit breakers are mostly realized by angle sensing technology. Angle sensors are used to detect mechanical rotation angles, which convert mechanical rotation or angular displacement into electrical signal output, and have no contact, no noise, high sensitivity, high Repeatability, nearly infinite rotation life, good high-frequency response characteristics, and strong environmental applicability; but when the angle sensor is applied to the displacement measurement of the circuit breaker, it can only measure the angle of the main drive shaft, and cannot reflect the three-phase contact of the circuit breaker in real time. Movement, unable to perceive the asynchrony of the three-phase contacts, and the stroke monitoring of the circuit breaker is not comprehensive enough

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