Combined cycle electric power plant and a gas turbine having an improved startup control especially useful in a backup control system
Patent
·
OSTI ID:7356021
A combined cycle electric power plant is described which contains at least one gas turbine and a means for generating steam in response to heat energy from the gas turbine. The plant also contains a steam turbine driven by steam supplied to it from the steam generator means for generating electric power under the driving power of the turbines, means for controlling the operation of the turbines and steam generator. The controlling means includes a gas turbine control system having an automatic control and a backup control, the gas turbine control system including means for transferring between the automatic and backup controls under predetermined conditions, the backup control including means for manually raising and lowering a fuel demand signal applied to the fuel control means at least to control gas turbine load during the load mode of operation, means for limiting the operation of the fuel flow controlling means to limit the turbine outlet gas temperature, and circuit means for generating a feed-forward startup signal which increases as a function of time and which is applied to the fuel flow controlling means to provide for turbine acceleration normally without operation of the temperature limiting means to a speed at which synchronization control is is to occur.
- Assignee:
- Westinghouse Electric Corp.
- Patent Number(s):
- US 3943372
- OSTI ID:
- 7356021
- Country of Publication:
- United States
- Language:
- English
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