Abstract: Systems and methods for NOx prediction in a power plant are disclosed. According to one embodiment of the disclosure, a method for NOx prediction in a power plant can be provided. The method may include receiving parameters associated with operation of a combined gas turbine and steam turbine in a power plant, wherein the parameters comprise a combined power output value; determining a steam turbine power output value; based at least in part on the steam turbine power output value, estimating a gas turbine power output value. The method may further include: based at least in part on an input matrix, determining a set of modeled gas turbine parameters.

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.

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.