SYSTEMS AND METHODS FOR CONTROLLING FLOW OF EXHAUST GAS IN GAS TURBINE SYSTEMS WITH RECIRCULATION OF EXHAUST GAS Russian patent published in 2018 - IPC F02C3/34 

FIELD: engines and pumps.

SUBSTANCE: method of controlling a gas turbine system with exhaust gas recirculation (EGR) in which the angle of plurality of inlet guide blades of the exhaust gas compressor of the gas turbine system with EGR is adjusted. The plurality of inlet guide blades has a first range of motion limited by a minimum angle and a maximum angle, at that, the angle is adjusted based on one or more monitored or modelled parameters of the gas turbine system with EGR. The pitch of plurality of blades of the supercharger of the recirculation blower arranged upstream of the exhaust gas compressor is adjusted. The plurality of supercharger blades has a second range of motion limited by a minimum pitch and a maximum pitch, and the pitch of the plurality of supercharger blades is adjusted based on at least the angle of the plurality of inlet guide blades. The gas turbine system comprises an exhaust gas compressor disposed along the EGR path and configured to compress recirculated exhaust gas. A recirculation supercharger comprising a plurality of supercharger blades and an electric motor and located along the EGR path and upstream of the exhaust gas compressor. The controller is connected to the flow control element and the recirculation supercharger. The controller is arranged to control the position of the flow control element based on the measured or modulated parameter of the gas turbine system with EGR, and is configured to control one or more operational parameters of the recirculation blower for controlling the flow of recirculated exhaust gas to the inlet section based on the position of the flow control element. Said one or more operation parameter includes a rotational speed of a supercharger controlled by said electric motor, a pitch of a plurality of supercharger blades, or any combination thereof.

EFFECT: improved responsiveness for controlling gas turbine systems with exhaust gas recirculation.

25 cl, 10 dwg, 2 tbl