Verfahren und Anordnung zum Anfahren einer Gasturbine

摘要

A method of starting a gas turbine of high output of P > 100 MW el in a combined-cycle power station (50) having a gas turbine (60) and a steam turbine (54) with allocated generators (56, 58), characterized by the following steps: a) generation of starting steam for starting the steam turbine (54), b) admission of the starting steam to the steam turbine (54) and run-up of the steam turbine (54), which likewise accelerates a generator (58) coupled thereto, c) generation of electric energy at a voltage and frequency varying as a function of the rotational speed, d) feeding the electric energy at variable voltage and frequency into the generator (56) allocated to the gas turbine (60) and working in motor operation, e) run-up of the gas turbine (60) by the allocated generator (56) working in motor operation to at least 60% of the rated speed, and f) switching over to generator operation and synchronizing the generators (56, 58).