There are many systems or devices that need to be synchronized with GPS Beidou clock in substation/power plant, such as DCS, PLC, NCS, SIS, MIS, RTU, fault recorder, microcomputer protection device, etc. It is a standard practice to unify the clocks of all systems in the whole plant or station with GPS Beidou standard synchronous clock.
The master clocks of distributed control system (DCS), auxiliary system programmable controller (PLC), plant-level monitoring information system (SIS) and power plant management information system (MIS) in substations and power plants can get the standard TOD (year, month, day, minute and second) time through the appropriate GPS Beidou clock signal interface, and then according to their respective clock synchronization mechanisms, the slave clock deviation in the system can be limited to a small enough range. I'm an engineer from Xi 'an Synchronous Electronic Technology Company in Ma Xiao. I specialize in time synchronization design, so I know a lot about the time realization of DCS system. I hope my answer is useful to you. You can also visit Xi 'an Synchronous Electronic Technology website directly to learn more about time synchronization solutions and time-frequency knowledge.
GPS Beidou synchronous clock signal output includes many types: including 1PPS/ 1PPM output, IRIG-B output, RS-232/RS-422/RS-485 output, NTP/SNTP network output, IEEE 1588 output, etc.
The following points should be paid attention to when determining the synchronization clock of GPS Beidou:
These systems belong to thermal control, electrical and system specialty. If it is decided that the GPS Beidou synchronous clock provided by DCS manufacturers will realize time synchronization (the usual practice at present), professional cooperation should be carried out before DCS contract negotiation to determine the requirements of clock signal interface. (General GPS Beidou synchronous clock can be configured with different numbers and types of output modules. If the relevant requirements cannot be determined in advance, the corresponding contract terms should be adjusted. )
In DCS design, we should not only pay attention to the absolute timing accuracy of master and slave clocks, but also pay attention to the relative error between clocks. Because if we want to design SOE points in a decentralized way without excessively reducing the event resolution, the key is to make the deviation of each clock as small as possible.
I hope my answer can help more people.