Electrified on-line monitoring and protecting device for intelligent high-voltage vacuum circuit breaker

Abstract

The invention discloses an electrified on-line monitoring and protecting device for an intelligent high-voltage vacuum circuit breaker. The electrified on-line monitoring and protecting device for the intelligent high-voltage vacuum circuit breaker comprises a hall current sensor, a differential transformer displacement transducer, a pressure sensor and a wireless temperature sensor, wherein a signal output end of the hall current sensor is connected with an A/D (Analog to Digital) converter I; a signal output end of the differential transformer displacement transducer is connected with an A/D converter II; a contact switch port is connected with an optoelectronic isolation module; a signal output end of the pressure sensor is connected with a vacuum degree monitor; and the A/D converter I, the A/D converter II, the optoelectronic isolation module and the vacuum degree monitor are respectively connected with a central processing unit; the central processing unit is connected with an RS485 communication module and a displayer; and the wireless temperature sensor is in wireless communication connection with a temperature collector in the central processing unit. The electrified on-line monitoring and protecting device for the intelligent high-voltage vacuum circuit breaker has strong antijamming capability, high monitoring accuracy, strong stability, and reliable safeguard procedures.

Description

technical field [0001] The invention mainly relates to the field of high-voltage power systems, in particular to a live online monitoring and protection device for an intelligent high-voltage vacuum circuit breaker. Background technique [0002] In the high-voltage power system, especially the high-voltage vacuum circuit breaker is a primary device used to close, carry and break the power load, its failure rate is high, and it will cause grid accidents and cause huge economic losses. The reliability of the operation of the device puts forward higher requirements. At present, the regular maintenance and troubleshooting of high-voltage vacuum circuit breakers lack certain pertinence, and a lot of manpower and material resources are required, and problems are often not found in time. [0003] As the requirements of the control system in the power system are getting higher and higher, the frequent operation of the high-voltage vacuum circuit breaker is required, which accel...

AI Technical Summary

Problems solved by technology

[0009] 5. The existing online monitoring device can only display the operating status of the circuit breaker;

[0010] 6. At present, only buttons can be used to control the display device, and some devices do not have a communication module

[0012] 1. The grating method to measure the displacement is complex, the response speed is slow and the stability is not ideal; the mechanical performance of the measuring device using the angle method is not ideal;

[0013] 2. Ordinary current transformers measure the current of closing and opening coils. The monitoring system is simple, the accuracy is not high, and the stability is poor;

[0014] 3. These methods cannot be effectively promoted and applied as a preventive measure due to defects such as poor insulation performance, large measurement deviation, incapable of remote transmission or direct observation of hot spots;

[0015] 4. Using the electro-optical conversion method to monitor the vacuum degree online, the anti-interference ability is poor, the monitoring is unstable and reliable, and the accuracy is not high;

[0016] 5. It cannot effectively control the closing, opening and operation of the circuit breaker, and cannot control the electric rocking mechanism of the chassis;

[0017] 6. Button control is not smart enough, and the operation is complicated and the response speed is slow; the communication module is unreliable, and the communication with the control center does not match or the communication is unstable

Images