Systems, program products, and methods for adjusting operating limit (ol) threshold for compressors of gas turbine systems based on mass flow loss

A computer program product comprising program code, which when executed by at least one computing device, causes the at least one computing device to adjust operational parameters of a gas turbine system including a compressor having an inlet guide vane, by performing processes including:

• adjusting an operational characteristic measured by at least one sensor positioned within or adjacent the gas turbine system and adjusting an ambient fluid pressure measured by a pressure sensor positioned adjacent the gas turbine system, the measured operational characteristic and the measured ambient fluid pressure adjusted based on predetermined measurement uncertainties for the at least one sensor and the pressure sensor, respectively;
• estimating an first mass flow rate for the compressor of the gas turbine system based on the adjusted, measured operational characteristic, and the adjusted, measured ambient fluid pressure surrounding the gas turbine system;
• calculating a second mass flow rate for the compressor of the gas turbine system based on the adjusted, measured operational characteristic, and the adjusted, measured ambient fluid pressure surrounding the gas turbine system;
• determining a mass flow loss between the estimated, first mass flow rate and the calculated, second mass flow rate for the compressor of the gas turbine system;
• and
• adjusting an operating limit (OL) threshold for the compressor of the gas turbine system based on the mass flow loss, the OL threshold for the compressor being below a predetermined surge threshold for the compressor.

A method for adjust operational parameters of a gas turbine system including a compressor having an inlet guide vane, the method comprising:

• adjusting an operational characteristic measured by at least one sensor positioned within or adjacent the gas turbine system and adjusting an ambient fluid pressure measured by a pressure sensor positioned adjacent the gas turbine system, the measured operational characteristic and the measured ambient fluid pressure adjusted based on predetermined measurement uncertainties for the at least one sensor and the pressure sensor, respectively;
• estimating an first mass flow rate for the compressor of the gas turbine system based on the adjusted, measured operational characteristic, and the adjusted, measured ambient fluid pressure surrounding the gas turbine system;
• calculating a second mass flow rate for the compressor of the gas turbine system based on the adjusted, measured operational characteristic, and the adjusted, measured ambient fluid pressure surrounding the gas turbine system;
• determining a mass flow loss between the estimated, first mass flow rate and the calculated, second mass flow rate for the compressor of the gas turbine system;
• and
• adjusting an operating limit (OL) threshold for the compressor of the gas turbine system based on the mass flow loss, the OL threshold for the compressor being below a predetermined surge threshold for the compressor.