A method for detecting leaks in a fuel circuit of a gas turbines fuel supply system

摘要

This is a method for detecting a leak in a fluid connection for a fuel supply system (22) of a gas turbine (10) discloses. The method comprises the closing of a flow control valve (40) to a current upwardly properties of the end of the fuel supply system (22) and the pressurizing of the fuel supply system (22) with a compressed medium (64) via a supply (50) for the compressed medium to a setpoint pressure. The nominal pressure is less than a pressure threshold value of a shut-off valve (58), the downstream of the supply (50) for compressed medium and upstream of a corresponding combustion chamber (24) of the gas turbine legs (10) is arranged. The method comprises, in addition, the directing a receiver section (68) of an ultrasound detection of a direction (66) in the vicinity of at least one line connector (60) of the fuel supply system (22), which is present between the shut-off valve (58) and a combustion chamber (24) is arranged, the fluid communication with the fuel supply system (22) is connected. The detection of an increase in a noise level and / or the space noise at the line connection pieces (60) is indicative of a leakage along the line connector.