A method and apparatus for starting a gas turbine using a polyphase electric power generator

摘要

A method to start a combined unit gas turbine (28) and electrical unit (10) having a static start drive (22) including the steps of: applying a variable frequency voltage from the static start drive (22) to a winding (16) of the generator to accelerate the combined unit to a turbine self-sustaining speed; accelerating the combined unit beyond the self-sustaining speed by applying torque generated by the turbine (28), and as the combined unit accelerates to a synchronous speed, applying a braking torque from the static start drive (22) to steady the combined unit at the synchronous speed.