Concentrated inspection method for timing error of wide-area time synchronization system

Abstract

Provided is a concentrated inspection method for timing error of a wide-area time synchronization system. In the first step, a master clock sends an inspection order message to a remote slave clock, and measures and temporarily stores a master clock message sending timestamp A, and the slave clock measures and records a slave clock message receiving timestamp B after receiving the inspection order message. In the second step, the slave clock prepares a response message in advance, immediately sends the response message out after receiving the inspection order message, and measures and records a slave clock message sending timestamp C, and the master clock measures and records a master clock message receiving timestamp D after receiving the response message. In the third step, the slave clock organizes a follow-up message including the slave clock message receiving timestamp B and the slave clock message sending timestamp C and sends the follow-up message to the master clock after sending the response message out, the master clock obtains the master clock message sending timestamp A, the slave clock message receiving timestamp B, the slave clock message sending timestamp C and the master clock message receiving timestamp D after receiving the follow-up message, the master clock calculates the timing error of the slave clock according to the four values, and the master clock outputs the timing error of each slave clock to a server for storage, counting and analysis so as to complete concentrated inspection.

Description

technical field [0001] The present invention is aimed at the time synchronization of communication systems in the fields of electric power, telecommunications, and the military. The monitoring method can monitor the synchronization effect of the time synchronization system in real time. Background technique [0002] In many fields involving wide-area communication networks such as electric power, telecommunications, and the military, the time synchronization of equipment at all levels on the communication network is the basic guarantee for ensuring the normal and reliable operation of the communication network. The related technical background of time synchronization is briefly described below by taking the power system as an example. [0003] The power time synchronization system is the basis for the safe and reliable operation of the smart grid. It is one of the core equipment of the power system. The time synchronization of the whole power network is to ensure the unifor...

AI Technical Summary

Problems solved by technology

During the transmission process of the time signal, it needs to pass through a large number of fiber channels and multi-level SDH node equipment for multiplex conversion. Among them, transmission link switching, SDH pointer adjustment, transmission link delay, etc. will affect the time accuracy of the slave clock. Algorithms can eliminate part of the impact, but no two clocks will be absolutely consistent. If the magnitude of time is subdivided, there will still be errors in the time accuracy of the slave clock.

Images