METHOD FOR TESTING AN OVERSPEED PROTECTION DEVICE OF A SINGLE-SHAFT SYSTEM

• Main Authors: PAHL, ANDREAS, VELTMANN, DAVID, HAAS, SUSANNE, OPHEY, MARTIN, ENGLER, THORSTEN, STAPPER, MARTIN, PIECZYK, MARIAN-PETER
• Format: Patent
• Language: English; Polish
• Published: 30.04.2018
• Subjects: BLASTING; ENGINE PLANTS IN GENERAL; HEATING; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES; STEAM ENGINES; WEAPONS

The invention relates to a method for testing an overspeed protection device of a single-shaft system (1) having a gas turbine (2) and a steam turbine (3), said method having the steps of: a) providing a first speed-measuring device for measuring the speed of the steam turbine (3), the first speed-measuring device having at least one marking on the shaft (6) of the single-shaft system (1) and having a stationary scanning device by means of which the at least one marking can be detected when the marking is moved past the scanning device; b) increasing the number of markings of the first speed-measuring device, whereby the speed measured by means of the first speed-measuring device is higher than the actual speed; c) increasing the mass flow of the steam introduced into the steam turbine (3) and/or of the fuel introduced into the gas turbine (2) in such a way that the measured speed of the steam turbine (3) reaches a steam turbine threshold value speed, the overspeed protection device being designed in such a way that a first overspeed protection is triggered as soon as the measured speed of the steam turbine (3) reaches the steam turbine threshold value speed; d) checking whether the first overspeed protection has been triggered.