Abstract: Aimed at the puzzles of being poor in interoperability and difficult in implementing information interaction among intelligent electronic devices (IED) for substations,the paper explored the implementation of message transmission of IEC61850standard based on embedded real time operating system of VxWorks．By means of multitasking environment and function of communication and synchronization among proceedings offered by Wind micro-core of VxWorks,it discussed the task scheduling strategy,communication synchronization and mutual exclusion mechanism,researched the communication map of information model and transmission service of high-speed packets,constructed the solid information model implemented by IEC61850standard,analyzed the implementation of high-speed packets in the VxWorks,and also the optimal recommended scheme was given．The result of preliminary experiment in the spare powerautomatic switching of economic operation of transformer shows that date international standard of IEC61850substation automation is propitious to implementing the monitoring of power parameter by adopting date communication technology,and it obligates wide space for system prolongation．

Key words: IEC61850standard,Communication map,Message transmission,Embedded real time operating system