Systems and methods for unchoked control of gas turbine fuel gas control valves
AssigneeGeneral Electric Company
InventorsScott William Szepek, Michael John Mariani, Robert Loeven
Life of this patent
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Abstract
Certain embodiments of the invention may include systems and methods for providing unchoked control of gas turbine fuel control valves. According to an exemplary embodiment of the invention, a method is provided for active control of a gas flow control valve. The method may include receiving a desired fuel command and an inlet pressure parameter, and determining a gas flow gain based at least in part on the inlet pressure parameter. The method may also include determining a valve flow coefficient based at least in part on the desired fuel command and the gas flow gain, and controlling the gas flow control valve based at least in part on the valve flow coefficient.
Claims20
A method, comprising executing computer executable instructions by one or more processors for control of a gas flow control valve, the method further comprising:
- receiving a desired fuel command and an inlet pressure parameter;
- determining a choked valve flow factor and an unchoked valve flow factor, both the choked valve flow factor and the unchoked valve flow factor based at least in part on the inlet pressure parameter;
- determining a gas flow gain based at least in part on either the choked valve flow factor and the unchoked valve flow factor, wherein determining the gas flow gain further comprises inverting the product of the choked valve flow factor and an unchoked multiplier;
- determining a valve flow coefficient based at least in part on the desired fuel command and the gas flow gain;
- and
- controlling the gas flow control valve based at least in part on the valve flow coefficient.
A system comprising:
- a gas turbine combustor;
- one or more gas flow control valves coupled with the combustor;
- and
- a controller comprising one or more processors operable to:
- receive a desired fuel command and an inlet pressure parameter;
- determine a choked valve flow factor and an unchoked valve flow factor, both the choked valve flow factor and the unchoked valve flow factor based at least in part on the inlet pressure parameter;
- determine a gas flow gain based at least in part on either the choked valve flow factor and the unchoked valve flow factor, wherein determining the gas flow gain further comprises inverting the product of the choked valve flow factor and an unchoked multiplier;
- determine a valve flow coefficient based at least in part on the desired fuel command and the gas flow gain;
- and
- control the gas flow control valve based at least in part on the valve flow coefficient.
A controller comprising one or more processors operable to:
- receive a desired fuel command and an inlet pressure parameter;
- determine a choked valve flow factor and an unchoked valve flow factor, both the choked valve flow factor and the unchoked valve flow factor based at least in part on the inlet pressure parameter;
- determine a gas flow gain based at least in part on either the choked valve flow factor and the unchoked valve flow factor, wherein the gas flow gain comprises inverting the product of the choked valve flow factor and an unchoked multiplier;
- determine a valve flow coefficient based at least in part on the desired fuel command and the gas flow gain;
- and
- control the gas flow control valve based at least in part on the valve flow coefficient.
Dependencies are inferred from the claim text.