Self-inspection circuit and self-inspection method of signal acquisition loop of vacuum degree monitoring device

A monitoring device and signal acquisition technology, applied in circuits, high-voltage air circuit breakers, electric switches, etc., can solve the problem that the effectiveness of the vacuum degree online monitoring system cannot be guaranteed, the vacuum degree of the vacuum circuit breaker cannot be effectively reflected, and the vacuum degree monitoring system is not effective. With self-check function and other issues, to achieve the effect of easy promotion, high reliability, and verification effectiveness
CN111584299BActive Publication Date: 2022-03-01国网河南省电力公司邓州市供电公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
国网河南省电力公司邓州市供电公司
Publication Date
2022-03-01

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Abstract

The invention discloses a self-inspection circuit and a self-inspection method of a signal acquisition loop of a vacuum degree monitoring device, which belongs to the technical field of online monitoring of electrical equipment, and includes a vacuum degree monitoring device and a self-inspection device connected to a core processing unit circuit of the vacuum degree monitoring device unit; the self-test unit includes a self-test button, a reset button, a self-test control relay, an alarm control relay, an optocoupler, a high-pass filter circuit, and a sensitivity adjustment circuit. Both the self-test button and the reset button are connected to the self-test control relay, and the self-test control The relay, the alarm control relay, the optocoupler and the alarm control module are connected in sequence, the self-check control relay controls the pulse generation module to send a pulse signal, the pulse signal enters the pulse counting module through the high-pass filter circuit and the sensitivity adjustment circuit, and the signal of the pulse counting module and the alarm control module connect. The invention can verify the effectiveness of the vacuum degree online monitoring system of the vacuum circuit breaker, avoid false alarms and missed guarantees, and ensure the reliability of power supply.
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Description

technical field

[0001] The invention relates to the technical field of on-line monitoring of electrical equipment, in particular to a self-inspection circuit and a self-inspection method of a signal acquisition loop of a vacuum degree monitoring device. Background technique

[0002] The modern production process of vacuum circuit breakers can guarantee the service life of the vacuum interrupter to about 15 years. Temperature drop is one of the common electrical failures of vacuum circuit breakers, which has long threatened the safety of the power grid operation. The problem of real-time monitoring of the vacuum degree of the vacuum interrupter of the medium voltage vacuum degree circuit breaker has always been a hot topic of research by scholars at home and abroad.

[0003] The on-line monitoring system for vacuum degree of vacuum circuit breaker designed based on the principle of high-frequency discharge pulse detection uses the metal plate antenna sensor installed next to...

Claims

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