Research On Improving Security Of The Large Generator-transformer Unit Protector

With the large generator-transformer set redundant protection, in order to avoid misoperation, a scheme of protect CPU adding startup CPU is designed for security increase. This scheme uses MPC555 as its hardware platform's CPU and uses Nucleus PLUS as software platform's real time operation system, which huge facility software upgrade and maintenance. According to startup recorder function of startup CPU, its hardware resource is detailed designed, and each subprogram module of software is detailed explained, then program flowchart is introduced. After algorithm in startup process is presented, startup criterion of various protections is lucubrated. Lastly, scheme feasibility and set reliability are validated by dynamic simulation and static simulation.