Vacuum tube vacuum-degree on-line monitoring device of high-voltage power distribution device and method thereof

Abstract

The invention relates to a vacuum tube vacuum-degree on-line monitoring device of a high-voltage power distribution device and a method thereof; in the device, a capacity coupler carries out coupling to an alternating-current field signal, a coupling electric field signal is led out to a signal pick-up circuit by a capacitance potentiometer low-voltage arm, after carrying out rectification filtering processing, the pick-up signal is converted into a frequency signal through a voltage-to-frequency conversion circuit, and the frequency signal is transmitted to a microprocessor unit after being coupled and separated. Software processing and analysis are carried out to the acquired signal of the microprocessor, so as to realize the vacuum-degree on-line monitoring function with 10-2 of resolution ratio, an acousto-optic alarming unit realizes vacuum degree degradation pre-alarming function, and the monitoring system and other monitoring systems are synchronized and integrated by a communication unit, so as to be convenient for centralized processing, analysis and sharing of the data. In the device, by monitoring the change of the vacuum tube shielding case alternating-current potentiometer, the change of the vacuum degree is monitored; the structure is simple, the cost is low, the disadvantage that the temperature of a crystal element of a photoelectric probe such as pockels is overcome, the measurement is reliable, the installation is convenient, therefore, the invention is a real-time monitoring device with complete function.

Description

technical field [0001] The invention relates to an online monitoring device and a monitoring method for the vacuum degree of a vacuum tube, in particular to a monitoring device and a method for the vacuum degree of a vacuum tube in a high-voltage power distribution device. technical background [0002] For a long time, explosion accidents caused by vacuum tubes in high-voltage power distribution devices have occurred frequently due to the deterioration of vacuum degree. Therefore, the pulse magnetron discharge method is used to detect the vacuum degree of vacuum tubes in high-voltage power distribution devices. This method has good repeatability, but in The switch needs to be powered off during the detection, and the change of the vacuum degree cannot be continuously monitored; the AC withstand voltage method is also a common method in the power switch industry at present. This method can be used as a direct criterion for judging whether the vacuum switch can be put into powe...

AI Technical Summary

Problems solved by technology

[0005] The invention aims at that there are many heating elements in the high-voltage power distribution device, which itself is a relatively large heat source body, and the internal temperature of the power distribution device is much higher than the ambient temperature, while the existing vacuum tube vacuum degree in the high-voltage power distribution device can be satisfied. The monitoring device required for online monitoring has problems such as poor temperature stability and inaccurate measurement

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