Gas turbine model and a method for the modeling of a gas turbine

1. A numerical modeling system of a gas turbine for transient and steady state simulation, producing at least one process parameter, the system comprising:

a computer or controller, and a memory device accessible by the computer or controller; and

a numerical model stored in the memory device comprising at least one dynamic sub model which simulates a dynamic influence of volumes, actuators, and/or measurement systems, and/or rotor dynamics, and at least one static sub model which simulates the gas turbine disregarding said volumes, dynamics of actuators, measurements, and rotor dynamics of the gas turbine simulated by said at least one dynamic sub model,

wherein the at least one dynamic sub model includes at least one dynamic input sub model which models the dynamic influence of volumes and/or measurement systems, and generates an input variable for the at least one static sub model from a control variable of the gas turbine.

2. A modeling system according claim 1 , wherein the at least one dynamic sub model includes at least one dynamic output sub model which models the dynamic influence of volumes and/or measurement systems, and/or rotor dynamics, and generates through simulation real or measured output variables based on output variables of the static sub model.

3. A modeling system according to claim 1 , wherein the numerical model is configured and arranged to neglect the dynamic influence of metal masses on a heat balance of the gas turbine.

4. A modeling system according to claim 1 , wherein:

the at least one dynamic sub model comprises linear differential equations which are solved by Laplace Transformation; and the numerical model comprises a single input, single output equation in the Laplace transformed form.

5. A modeling system as claimed in claim 1 , further comprising:

two input sub models of which one generates a first input variable, said first input variable corresponding to a fuel mass flow, and the other of said two input sub models generates a second input variable, said second input variable corresponding to an angle of a variable inlet guide vane controller.

6. A modeling system as claimed in claim 5 , wherein the static gas turbine model is configured and arranged to generate a first output variable which corresponds to a pressure at a compressor outlet using the first and second input variables.

7. A modeling system as claimed in claim 6 , wherein the static gas turbine model is configured and arranged to generate a second output variable which corresponds to a power output of the gas turbine using the first and second input variables obtained from the input sub models and the first output variable of the static gas turbine model.

8. A modeling system as claimed in claim 6 , wherein the static gas turbine model is configured and arranged to generate a third output variable which corresponds to a turbine outlet temperature using the first and second input variables obtained from the input sub models and the first output variable of the static gas turbine model.

9. A method for real time simulation of a real gas turbine, the method comprising:

using a gas turbine modeling system according to claim 1 ; and

inputting results from the modeling as control settings of the real gas turbine.

10. A method according to claim 9 , further comprising:

adjusting the control settings to increase cycle efficiency, increase component life, reduce emissions, or combinations thereof.

11. A method according to claim 9 , further comprising:

adjusting the control settings to realize fast transients, improve control accuracy, or both.

12. A method according to claim 9 , further comprising:

monitoring the gas turbine based at least on deviations between model results and real gas turbine data.

13. A method of creating a model for simulating operation of a gas turbine, the method comprising:

splitting the process of the gas turbine into at least one dynamic and at least one static sub process parts,

wherein the at least one dynamic process part serves two functions:

wherein a first of the two functions comprises transferring data in real time to a virtual, quasi steady state input comprising a steady state model input plus input for simulating the time dependency of heat transfer into and out of metal masses of the gas turbine for the at least one static sub process; and

wherein a second of the two functions comprises transferring virtual quasi steady state output data back into real time; and

wherein the at least one static sub process part models the gas turbine under virtual steady state conditions.

14. A numerical modeling system of a gas turbine for transient and steady state simulation, producing at least one process parameter, the system comprising:

a computer or controller, and a memory device accessible by the computer or controller; and

a numerical model stored in the memory device comprising at least one dynamic sub model which simulates a dynamic influence of volumes, actuators, and/or measurement systems, and/or rotor dynamics, and at least one static sub model which simulates the gas turbine disregarding said volumes, dynamics of actuators, measurements, and rotor dynamics of the gas turbine simulated by said at least one dynamic sub model,

wherein the at least one dynamic sub model includes at least one dynamic output sub model, which models the dynamic influence of volumes and/or measurement systems, and/or rotor dynamics, and generates through simulation real or measured output variables based on output variables of the static sub model.