Abstract: The present subject matter is directed to methods and systems for providing adaptive modeling of performance degradation in a system, particularly, a gas turbine system. A performance model is provided and operated as both a calibration model and a baseline model. Data produced during both operations is stored and differences there between is used in adaptive logic, which may correspond to a neural network, to predict performance degradation to control operation of a system baseline model. Data from operation of the system baseline model may also be stored and used with data from the calibration model and baseline model in the adaptive logic.

Abstract: Methods and systems for analyzing combustion dynamics of a combustor system in the time domain are provided. The combustor system includes an inlet pipe coupled in flow communication with a combustion chamber. The method includes determining a characteristic equation of a wave traveling in the inlet pipe, determining an acoustic pressure oscillation in the combustion chamber, and determining a pressure fluctuation in the inlet pipe using the characteristic equation and the determined acoustic pressure oscillation.

Abstract: A method of adjusting parameters for one or more heat soak models for a system in a transient performance model, comprising: simulating the system in a transient prediction module; generating a first prediction of the system from the transient prediction module; generating a transfer function in response to the first prediction and a set of field data utilizing a neural network module; applying the transfer function from the neural network module to the transient prediction module; adjusting parameters of a first heat soak model for the system in the transient prediction module in response to the application of the transfer function to match with the set of field data; and generating a calculated modifier in response to the adjustment of parameters of the first heat soak model, the calculated modifier is a calculated difference between the first prediction and a second prediction as defined by the transfer function.

Abstract: Methods and systems for analyzing combustion dynamics of a combustor system in the time domain are provided. The combustor system includes an inlet pipe coupled in flow communication with a combustion chamber. The method includes determining a characteristic equation of a wave traveling in the inlet pipe, determining an acoustic pressure oscillation in the combustion chamber, and determining a pressure fluctuation in the inlet pipe using the characteristic equation and the determined acoustic pressure oscillation.