METHOD AND SYSTEM FOR COMBUSTION CONTROL FOR GAS TURBINE SYSTEM WITH EXHAUST GAS RECIRCULATION

摘要

In a gas turbine system (52) having an exhaust gas recirculation system (54) receiving exhaust from the gas turbine system and recycling the exhaust gas back to the gas turbine system, a blower (580) with variable guide vanes (586) is positioned in the recirculation system. A system includes at least one sensor (600) configured to communicate a signal representative of the blower vane position. The system further includes a controller (118) communicatively coupled to the at least one sensor, wherein the controller is configured to execute a control logic to derive a reference value (618) for the blower vane position, and wherein the controller is configured to apply a direct limit, an model-based limit, or a combination thereof, to the reference value to derive a limit-based value (638), and wherein the controller is configured to position the blower vane based on the limit-based value.