OVERSPEED PROTECTION CONTROL ARRANGEMENT FOR A STEAM TURBINE GENERATOR CONTROL SYSTEM

摘要

33 In a steam turbine control system three overspeed protection circuits (OPC) are provided, each one being identical to the others and each having a programmable digital computer in two-way data communication with a master controller, as well as with the other OPCs. Speed transducers adjacent the turbine shaft provide speed transducers to the respective OPCs which calculate extremely precise RPM values utilizing an adaptive filter in the derivation process.