Multi-slave clock sampling value multi-interface synchronizing system based on IEEE1588

Abstract

The invention discloses a sampling value multi-interface synchronizing system based on IEEE1588, which is characterized by comprising a universal IEEE1588 clock interface and a universal multi-sampling value synchronizing interface, wherein the universal IEEE1588 clock interface is a communication receiving module provided with a plurality of IEEE1588 slave clock interfaces, and the number of theslave clocks can be automatically expanded according to the number of master clocks; and the universal multi-sampling value synchronizing interface is a communication interface which can form internetworking connection with merging units and comprises an Ethernet data receiving module, a software sampling and interpolating module, a phase-locked loop (PLL) module, a frequency tracking module and a multi-interface sampling value synchronizing module. The system of the invention can be used for electronic equipment requiring sampling synchronization, such as a digital protective relay device, an electric energy meter, an electric energy quality monitoring device and the like, thereby providing a convenient solution for the problem that the sampling value internetworking transmission in the prior art depends on the global sampling synchronous source.

Description

technical field [0001] Aiming at the problem that the sampling value transmission of the digital secondary equipment in the digital substation of the power system relies on a single global sampling synchronization source, the invention invents a multi-interface, independent of global sampling synchronization source and universally applicable sampling data receiving synchronization technology. The invention belongs to the technical field of electric power system digital substation. Background technique [0002] In the substation automation system, equipment such as protection and measurement and control devices need to realize synchronous acquisition and processing of the voltage and current of each phase in the same interval or across intervals of the access device, such as line protection, main transformer protection, and busbar protection. Sampling data synchronization, and the synchronization of sampling data is also particularly important for the identification and proce...

AI Technical Summary

Problems solved by technology

[0005] The synchronization of IEEE 1588 sampled values ​​is affected by the reliability of the IEEE 1588 main clock. When the main clock loses satellite time synchronization, the main clock can use its high-stable crystal oscillator to work for a period of time, but the accumulated error also affects the sampling accuracy of the sampled value.

In addition, when the connection between the main clock and the switch is disconnected for some reason, the entire time synchronization system will not work normally, which will affect the safe and stable operation of the entire integrated system.

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