Abstract: A system for time synchronization between multiple operating systems is provided, the system includes a Field Programmable Gate Array (FPGA) configured to obtain and maintain absolute time; and multiple operating systems (OS) that obtain the absolute time from the FPGA and perform time synchronization based on the obtained absolute time. According to the embodiments of the present disclosure, the system can solve the high accuracy time synchronization problem in a protection relay device with multiple operating systems.

Abstract: The present disclosure discloses an embedded system and a message processing method. The embedded system includes a field programmable gate array (FPGA) configured to determine at least one first generic object-oriented substation event (GOOSE) message to which the embedded system subscribes from a plurality of externally received GOOSE messages, wherein each first GOOSE message triggers an execution of one first task, and the first task is preconfigured as a plurality of subtasks; a first processing core configured to execute at least one first subtask of the plurality of subtasks; and a second processing core configured to execute at least one second subtask of the plurality of subtasks; wherein an execution of a 1st first subtask of the at least one first subtask is triggered by the first GOOSE message, and the at least one second subtask is executed after an execution of the at least one first subtask is completed.