Optimizing time synchronizing device for multi-channel clock sources

Abstract

The invention relates to an optimizing time synchronizing device for multi-channel clock sources. The optimizing time synchronizing device comprises at least two units identical in structure. In every unit, a global positioning system ground receiver (8) is connected with a counter (7), the counter (7) is further connected with a comparator (6) in the unit, a high-stability crystal oscillator (1) is directly connected with the counter (7) in every unit or connected with the counter (7) in every unit through a phase-locking frequency multiplier (2), and the comparator (6) in every unit is respectively connected with one input end of a multiplexer (4). The counter (7), the comparator (6) and a register (5) in every unit are respectively connected with a single chip microcomputer (3), and the output end of the single chip microcomputer (3) is further connected with the multiplexer (4). The optimizing time synchronizing device has the advantages that the comprehensive cost is low, algorithm adaptability is high, optimization of the multi-channel clock sources is supported, various time difference compensation strategies are supported, high-precision punctuality can be achieved, and time signal output is stable and reliable, and the like.

Description

[0001] technical field [0002] The invention relates to a time synchronization device, in particular to a multi-time source optimization time synchronization device mainly used in the field of electric power system and automation technology. Background technique [0003] During the operation of the power system, the operating state of the power grid changes rapidly. In order to ensure the safety and economic operation of the power grid, various automation devices based on computer technology and communication technology are widely used, such as dispatching automation systems, fault recording devices, microcomputer relays, etc. Electrical protection devices, event sequence recording devices, substation computer monitoring systems, electric energy billing systems, thermal power plant unit automatic control systems, lightning location systems, etc., the normal operation of these systems requires unified time reference support. [0004] Global Positioning System (GPS), as the m...

AI Technical Summary

Problems solved by technology

Such a system puts forward new and higher technical requirements for the time synchronization system: since the sampling pulse of the merging unit is synchronized with the second pulse of the time synchronization system, the fluctuation of the second pulse interval will have an impact on the generation of the sampling pulse of the merging unit, especially When the time synchronization system changes from the punctual state to the synchronous state, the traditional time synchronization system completes the one-time compensation for the error caused by punctuality, resulting in fluctuations in the second pulse interval, which adversely affects the stable operation of the merging unit

[0007] The current mainstream power time synchronization system generally adopts the structure with single-chip microcomputer + FPGA as the core. Through the analysis and calculation of the time source signal, the local clock is reconstructed and the time synchronization signal is output. This process has a strong dependence on the single-chip microcomputer. When the single-chip microcomputer is reset Or when the dog bites, it will temporarily stop the output of the time signal, which will affect the stability of the time synchronization system

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