gis circuit breaker on-line monitoring system realizing clock synchronization in rs485 communication

Abstract

The invention provides a GIS circuit breaker on-line monitoring system for realizing clock synchronization in RS485 communication. The system comprises a host and a slave, the host monitors the switching semaphore of the GIS circuit breaker; the slave monitors a current signal of the GIS circuit breaker; the master machine and the slave machine are connected through an RS485 interface. The connecting line of the RS485 interface is not only used as a communication connecting line between the host computer and the slave computer. Meanwhile, as a clock synchronization signal line between the hostcomputer and the slave computer, the connecting line of the RS485 interface is used for clock synchronization command control over the slave by the host, and the communication baud rate configurationwhen the communication baud rate configuration is used as an RS485 communication connecting line does not influence the synchronization control when the communication baud rate configuration is usedas the RS485 clock synchronization signal line. According to the system disclosed by the invention, the communication function and the clock synchronization signal function are realized only through one path of RS485, so that the clock synchronization effect of the system can meet the set requirement.

Description

technical field [0001] The invention relates to the technical field of communication, and more specifically, relates to an online monitoring system for GIS circuit breaker mechanical characteristics based on RS485 communication to realize clock synchronization. Background technique [0002] The GIS circuit breaker switch mechanical characteristic online monitoring system consists of a host computer and 3 monitors. The host monitors the signal quantity of the switch, including the opening and closing time of the signal, and the three monitors respectively detect the current signals of the A, B, and C three-phase switches, and the current signals include the closing current and the opening current. The monitored parameters include the magnitude of the current and the time for which the current is turned on. The switching signal and the current signal occur at different times, and the time correlation of these two signals is very close. The time of the current signal and the ...

AI Technical Summary

Problems solved by technology

[0004] Such two-way RS485 signal lines, in addition to the increase in the cost of the cable, also increase the amount of construction, and the instability of the extra-way signal will increase, and the corresponding maintenance will increase.

Images