SYSTEM AND METHOD FOR CONTROLLING THE COMBUSTION PROCESS IN A GAS TURBINE OPERATING WITH EXHAUST GAS RECIRCULATION

摘要

A gas turbine system (14) includes a fuel control system (264) configured to control a fuel flow to one or more combustors (160) and an oxidant control system (262) configured to control an oxidant flow to each combustor of the one or more combustors, wherein the oxidant flow is configured to at least partially react with the fuel flow within the one or more combustors to form an exhaust gas flow. The system also includes an exhaust gas system configured to direct a recirculation flow (276) of the exhaust gas flow to each combustor of the one or more combustors; and a controller (118) coupled to the fuel control system, the oxidant control system, and the exhaust gas system. The controller is configured to independently control a fuel-to-oxidant ratio (FOR) and an exhaust gas-to-oxidant ratio (EGOR). The FOR is the fuel flow divided by the oxidant flow, and the EGOR is the recirculation flow divided by the oxidant flow.