Method and apparatus for controlling moisture separator reheater
AssigneeGeneral Electric Company
InventorsSteven Craig Kluge, Michael James Molitor
Life of this patent
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Abstract
A system and a method are provided that may be used to control the temperature of steam being reheated by a moisture separator reheater (MSR). One embodiment provides a system including a steam turbine, a moisture separator reheater coupled to the steam turbine, and a controller programmed to control a temperature of steam leaving the moisture separator reheater based at least in part on sensor feedback. The controller is programmed to facilitate substantially smooth linear temperature ramping.
Claims20
A method for operating a turbine system, comprising:
- supplying first main steam from a main steam source to a high pressure steam turbine to enable the high pressure steam turbine to rotate a shaft in the turbine system using the main steam;
- supplying exhaust steam from the high pressure steam turbine to a moisture separator reheater to enable the moisture separator reheater to produce thermally enhanced steam by reheating the exhaust steam using second main steam received from the main steam source;
- supplying the thermally enhanced steam from the moisture separator reheater to a low pressure steam turbine to enable the low pressure steam turbine to rotate the shaft using the thermally enhanced steam;
- determining, using one or more sensors, a measured temperature of the thermally enhanced steam output from the moisture separator reheater;
- and
- controlling supply of the second main steam from the main steam source to the moisture separator reheater based at least in part on the measured temperature to facilitate substantially linearly ramping temperature of the thermally enhanced steam.
A tangible, non-transitory, computer-readable medium that stores instructions executable by one or more processors of a control system to control operation of a turbine system, wherein the instructions comprise instructions to:
- instruct, using the one or more processors, a first valve fluidly coupled between a high pressure steam turbine and a main steam source to enable supply of main steam from the main steam source to the high pressure steam turbine to facilitate rotating a shaft in the turbine system using the main steam;
- instruct, using the one or more processors, a second valve fluidly coupled between the moisture separator reheater and a low pressure turbine to enable supply of thermally enhanced steam from the moisture separator reheater to the low pressure steam turbine to facilitate rotating the shaft using the thermally enhanced steam;
- determine, using the one or more processors, measured temperature of the thermally enhanced steam based at least in part on sensor data received from one or more sensors;
- and
- instruct, using the one or more processors, a third valve fluidly coupled between the main steam source and the moisture separator reheater to adjust a first valve position to facilitate substantially linearly ramping temperature of the thermally enhanced steam by controlling amount of the main steam available to heat the exhaust steam in the moisture separator reheater.
A turbine system comprising:
- a moisture separator reheater comprising a first heat exchanger, wherein:
- the first heat exchanger is configured to receive first main steam from a main steam source;
- the moisture separator reheater is configured to receive exhaust steam output from a first steam turbine after second main steam received from the main steam source is used to actuate a shaft in the turbine system;
- and
- the moisture separator reheater is configured to output thermally enhance steam to be used by a second steam turbine to actuate the shaft by flowing the exhaust gas around the first heat exchanger;
- a temperature sensor coupled to an output of the moisture separator reheater, wherein the temperature sensor is configured to determine a measured temperature of the thermally enhanced steam;
- and
- a first valve fluidly coupled to the first heat exchanger, wherein the first valve is configured to adjust supply of the first main steam to the first heat exchanger based at least in part on the measured temperature to facilitate substantially linearly ramping temperature of the thermally enhanced steam.
Dependencies are inferred from the claim text.