Fuel supply apparatus, fuel-flow-rate-control unit, and gas-turbine power generating plant

摘要

A fuel supply apparatus is provided with a plurality of flow-rate regulating valves that regulate the flow rate of fuel flowing in a fuel supply line; a calculating section that calculates a required flow-rate coefficient on the basis of at least a fuel pressure in the fuel flow upstream of the flow-rate regulating valves, a pressure determined in advance as a fuel pressure downstream of the flow-rate regulating valves, and the flow rate of fuel to be supplied to one fuel nozzle among different kinds of fuel nozzles, the required flow-rate coefficient being the coefficient of the flow-rate regulating valve corresponding to the one fuel nozzle; and a valve control section that controls the degree-of-opening of the flow-rate regulating valve corresponding to the one fuel nozzle on the basis of the required flow-rate coefficient.

主权项

1. A fuel supply apparatus configured to control the flow rates of fuel to be supplied to fuel nozzles provided in a combustor of a gas turbine, the apparatus comprising:
a plurality of flow-rate regulating valves which are provided in fuel supply lines that supply fuel to the fuel nozzles and which regulate the flow rates of fuel flowing through the fuel supply lines; a calculating section that calculates required flow-rate coefficients of the flow-rate regulating valves corresponding to the fuel nozzles on the basis of at least an upstream-side fuel pressure in the fuel flow upstream of the flow-rate regulating valves, a downstream-side fuel pressure obtained using a predetermined relational expression on a basis of at least an operating parameter of a gas-turbine power generating plant including an atmosphere air temperature of the gas turbine, and the flow rates of fuel to be supplied to the fuel nozzles; and a valve control section that controls the degrees-of-opening of the flow-rate regulating valves on the basis of the required flow-rate coefficients.