System and method for operating exhaust gas recirculation in gas turbines

A system comprising:

• a gas turbine system comprising:
• a compressor;
• a combustor;
• a turbine;
• an exhaust gas recirculation (EGR) system configured to recirculate at least a portion of exhaust gas along an exhaust recirculation path from the turbine to an inlet of the compressor, wherein the exhaust recirculation path comprises an outlet in fluid communication with the inlet of the compressor;
• and
• an inlet sensor configured to detect one or more characteristics at the inlet;
• a control system comprising:
• one or more dampers disposed along the exhaust recirculation path and actuatable between open and closed positions, wherein the one or more dampers comprises an EGR outlet damper disposed at the outlet of the exhaust recirculation path to control injection of exhaust gas to the inlet of the compressor;
• an EGR sensor disposed along the exhaust recirculation path, wherein the EGR sensor is configured to detect a characteristic of the exhaust gas, wherein the EGR sensor is disposed between an exhaust gas compressor and the outlet damper;
• and
• a controller in communication with the inlet sensor, wherein the EGR sensor is configured to transmit sensor data to the controller, and wherein the controller is configured to:
• receive sensor data from the inlet sensor, the sensor data associated with a characteristic detected at the inlet;
• determine an EGR injection capacity based at least in part on the sensor data;
• and
• modulate a position of at least one of the one or more dampers based on the received sensor data in view of the determined EGR injection capacity to control an amount of exhaust gas injected into the compressor.