Gas turbine model and a method for the modeling of a gas turbine
AssigneeALSTOM Technology Ltd
InventorsXiao-Yi Zhang, Anton Nemet
Life of this patent
Estimating the term…
Abstract
Numerical gas turbine models permit transient modeling with high precision and at the same time numerically efficient processes for modeling a gas turbine. A gas turbine model includes a plurality of sub models. These sub models are either purely dynamic or static, which allows significant simplifications in the numerical solution of the overall model. System parts, which simulate the effects of volumes, metal masses, of actuators, and of measuring systems are regarded as dynamic. The remaining system parts are regarded as static over a time characteristic.
Claims14
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.
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.
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.
Dependencies are inferred from the claim text.