Bus time division multiplexing based electric energy synchronous sampling system

Abstract

The invention provides a bus time division multiplexing based electric energy synchronous sampling system. The bus time division multiplexing based electric energy synchronous sampling system comprises a main control unit, a plurality of electric energy acquisition units and a time division multiplexing unit, the time division multiplexing unit is respectively electrically connected with the maincontrol unit and the plurality of electric energy acquisition units, the main control unit transmits a synchronous acquisition instruction to the time division multiplexing unit, the time division multiplexing unit transmits the received synchronous acquisition instruction to the plurality of electric energy acquisition units, the plurality of electric energy acquisition units receive the synchronous acquisition instruction to start ADC conversion, and the acquired electric energy data are transmitted to the main control unit through the time division multiplexing unit. By adopting the time division multiplexing technique, an RS485 bus transmits data as a communication line and transmits a synchronous sampling pulse signal as a synchronous signal line at the same time, and the main controlunit achieves interaction of various complex data like remote signaling, telemetering, remote controlling and remote regulating of the electric energy acquisition units through the RS485 bus.

Description

technical field [0001] The invention relates to the technical field of power communication, in particular to a power energy synchronous sampling system based on bus time division multiplexing. Background technique [0002] At present, various measurement and protection devices in power systems generally require synchronous sampling of current and voltage data, which is of great significance to power system relay protection, fault identification, system stability analysis, and power measurement. Moreover, with the development of the power system, the requirements for system monitoring are getting higher and higher, and it is urgent to realize the remote synchronous sampling of the exchange data volume. A radio wave broadcast time synchronization method was used abroad earlier, but this method has its own weakness that is difficult to overcome: the synchronization accuracy is not high enough. At present, most of the power systems simply use communication commands for synchron...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiencies of the prior art, the object of the present invention is to provide a synchronous sampling system for electrical energy based on bus time division multiplexing, which solves the problems of poor synchronous sampling accuracy in different places and weak communication control capabilities in the power system

Images