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The IEEE1588 network time synchronization, matched with
smart substation information network transmission, is becoming
the next generation advanced data synchronization of the smart substation. It
is known that the inherent asymmetry error of the network synchronization
approach in the smart substation is highlighted, which is concerned particularly.
This paper models the synchronization process of the IEEE1588 based on the
communication simulation software of OPNET Modeler. Firstly, it builds the
models of master-slave clock, IEEE1588 protocol and network synchroniza- tion
model, and analyzes the composition and influencing factors of the asymmetry
error. Secondly, it quantitatively analyzes the influence of the synchronous
asymmetric error of the IEEE1588 affected by the network status differences and
the clock synchronization signal transmission path differences. Then its
correction method is analyzed, in order to improve the IEEE1588 synchronization
reliability and gives the solutions to its application in smart substation.