Method and apparatus for starting up a turboset
AssigneeSiemens Aktiengesellschaft
InventorJuergen Klaar
Life of this patent
Estimating the term…
Abstract
In order to achieve efficient utilization of components required for the generator operation, during the run-up of a turboset having a gas turbine, a generator and also a rectifier exciter, the latter is operated as an asynchronous generator, via which the rotor winding of the generator is supplied with direct current. As a result, neither slip rings nor a separate starting motor are required for the start-up of the turboset.
Claims8
A method of starting up a turbo including a gas turbine, a generator and an exciter, wherein the exciter has a exciter stator winding and a exciter rotor winding, comprising the steps of;
- supplying a three-phase current to the exciter stator winding, the three-phase current inducing a voltage in the exciter rotor winding as an asynchronous generator,
- generating a current in the exciter rotor winding by the induced voltage being rectified by a rectifier rotating with the exciter rotor winding and the current being supplied as direct current to a generator rotor winding of the generator, and
- passing a three-phase current through a generator stator winding of the generator which thereby acts as a converter-fed motor.
A method of starting up a power generation turboset including a turbine, a generator having a generator rotor winding and a generator stator winding and an exciter, having an a exciter stator winding, an exciter rotor winding, and an exciter rectifier comprising the steps of;
- generating a three phase current,
- supplying the three-phase current to the exciter stator winding,
- the three phase current in the exciter winging inducing a voltage in the exciter rotor winding as an asynchronous generator,
- rotating the exciter rotor,
- generating a current in the exciter rotor winding due to the induced voltage being rectified by the exciter rectifier rotating with the excite rotor winding,
- supplying the current from the exciter rotor being direct current to the generator rotor winding, and
- generating a second three phase current
- passing the second three-phase current through the generator stator winding, whereby the generator acts as a converter-fed motor that rotates the turbo set.
An apparatus for starting up and running a turboset having a gas turbine, a generator, and a rectifier exciter comprising,
- a stator winding of the rectifier exciter forming the excitation winding of an asynchronous generator, and
- the rectifier exciter having a rotatably arranged rectifier positioned therein which is electrically connected to a rotor winding of the generator, the stator winding of the generator being electrically connected to an indirect converter by means of a three-phase line.
Dependencies are inferred from the claim text.