Steam turbine plant
View Patent ↗A single shaft steam turbine plant is disclosed with a first and a second low pressure steam turbine located at either end of the shaft. A generator and at least one high-pressure steam turbine are located on the shaft between low pressure steam turbines.
1. A steam turbine plant comprising:
a shaft with first and second ends;
a first low pressure steam turbine and a second low pressure steam turbine at the first and second ends of the shaft respectively;
a generator on the shaft between the first low pressure steam turbine and the second low pressure steam turbine; and
a steam turbine train, on the shaft between the first and second low pressure steam turbines, the steam turbine train including at least one high-pressure steam turbine.
2. The steam turbine plant of claim 1 , comprising:
a first feed line, connecting the steam turbine train to the first low pressure steam turbine; and
a first off-take, in the first feed line, for supplying steam to a high demand steam consumer.
3. The steam turbine plant of claim 2 , comprising:
a second feed line joining the steam turbine train to the second low pressure steam turbine; and
a second off-take, in the second feed line, for supplying steam to a high demand steam consumer.
4. The steam turbine plant of claim 1 , comprising:
a first clutch, on the shaft, between the first low pressure steam turbine and the generator; and
a second clutch, on the shaft, between the second low pressure steam turbine and the steam turbine train.
5. The steam turbine plant of claim 1 , wherein the shaft does not include a clutch.
6. The steam turbine plant of claim 3 , comprising:
a first throttle valve, in the first feed line, downstream of the first off-take; and
a second throttle valve, in the second feed line, downstream of the first off-take.
7. The steam turbine plant of claim 2 , comprising:
a first clutch, on the shaft, between the first low pressure steam turbine and the generator; and
a second clutch, on the shaft, between the second low pressure steam turbine and the steam turbine train.
8. The steam turbine plant of any one of claim 3 , comprising:
a first clutch, on the shaft, between the first low pressure steam turbine and the generator; and
a second clutch, on the shaft, between the second low pressure steam turbine and the steam turbine train.
9. The steam turbine plant of claim 2 , wherein the shaft does not include a clutch.
10. The steam turbine plant of claim 3 , wherein the shaft does not include a clutch.
11. The steam turbine plant of claim 8 , comprising:
a first throttle valve, in the first feed line, downstream of the first off-take; and
a second throttle valve, in the second feed line, downstream of the second off-take.
12. The steam turbine plant of claim 10 , comprising:
a first throttle valve, in the first feed line, downstream of the first off-take; and
a second throttle valve, in the second feed line, downstream of the second off-take.
13. A method of operating a steam turbine power plant which includes:
a shaft with first and second ends;
a first low pressure steam turbine and a second low pressure steam turbine at the first and second ends of the shaft respectively;
a generator on the shaft between the first low pressure steam turbine and second low pressure steam turbines;
a steam turbine train, on the shaft between the first and second low pressure steam turbines, the steam turbine train including at least one high-pressure steam turbine;
a first feed line, connecting the steam turbine train to the first low pressure steam turbine; and
a first off-take, in the first feed line, for supplying steam to a high demand steam consumer; wherein the method comprises:
identifying peak and non-peak electricity price periods; and
selectively operating and closing the first off-take valve to supply steam to a high-demand customer during a non-peak period and not supply steam to the high demand customer during a peak period.
14. A method of operating a steam turbine power plant which includes:
a shaft with first and second ends;
a first low pressure steam turbine and a second low pressure steam turbine at the first and second ends of the shaft respectively;
a generator on the shaft between the first low pressure steam turbine and second low pressure steam turbines;
a steam turbine train, on the shaft between the first and second low pressure steam turbines, the steam turbine train including at least one high-pressure steam turbine;
a first feed line, connecting the steam turbine train to the first low pressure steam turbine,
a first off-take, in the first feed line, for supplying steam to a high demand steam consumer, wherein the method comprises:
identifying peak and high and low grid demand periods; and
selectively operating and closing the first off-take valve to supply steam to a high-demand customer during a high and low grid demand periods and not supply steam to the high demand customer during a peak period.