Abstract: Embodiments of the disclosure are directed at determining rotor deterioration in a dynamoelectric machine. Various current and voltage measurements are carried out upon an exciter assembly when the dynamoelectric machine is operated at various speeds and at various occasions over an extended period of time. More particularly, a set of current and voltage measurements that are carried out when the dynamoelectric machine is in a slow-roll mode of operation can be used for determining a resistance of a current path through which the exciter assembly provides electrical power to a rotor assembly. A time-domain-to-frequency-domain conversion can be carried out upon this set of resistance measurements in order to generate a spectral signature. The spectral signature can then be evaluated to detect an altered rotor resistance condition and/or a rotor resistance alteration trend.

Abstract: A method using an inverse three-way valve model with feed-forward fuel flow control is provided for controlling liquid fuel flow in a turbine power generation system to achieve a bump-less driven watts (dwatt) power output during fuel mode transitions between passive mode and active mode operations of a three-way check valve that delivers liquid fuel to the turbine combustor nozzles. The method utilizes an inverse fluid flow model for a three-way check valve which is based upon a valve position surrogate for the three-way check valve to develop a calculated estimate of a fuel spike/dwatt oscillation likely to occur during mode transitions of the three-way check valve and to produce a feed-forward control used to modulate a fuel path bypass valve within the turbine fuel supply circulation system that provides the liquid fuel to the three-way valve during transfers of valve operation between passive and active mode operations.

Abstract: According to examples, heat recovery steam generator (HRSG) adaptive control may include accessing information including HRSG design operation data for an HRSG, and plant operation data for a plant including the HRSG, and accessing simulation results of an HRSG transient dynamic model. A tuning parameter for the HRSG transient dynamic model may be determined based on an analysis of the information and the simulation results. The HRSG transient dynamic model may be updated based on an application of the tuning parameter. Simulation results may be generated based on execution of the updated HRSG transient dynamic model. A determination may be made as to whether a convergence criterion is met based on an analysis of the information and the further simulation results. In response to a determination that the convergence criterion is met, operation of the MSG may be controlled using the updated HRSG transient dynamic model.

Abstract: In an embodiment, a control system includes a processor. The processor is configured to receive signals from one or more sensors disposed in a gas turbine system, wherein the gas turbine system comprises a shaft mechanically coupled to an electric generator. The processor is further configured to predict a derived mechanical power for the shaft based on the signals. The processor is additionally configured to derive a power adjustment by executing at least one model. The processor is also configured to derive a corrected mechanical power by applying the power adjustment to the derived mechanical power; and to control the gas turbine system based on the corrected mechanical power.

Abstract: In an embodiment, a control system includes a processor. The processor is configured to receive signals from one or more sensors disposed in a gas turbine system, wherein the gas turbine system comprises a shaft mechanically coupled to an electric generator. The processor is further configured to predict a derived mechanical power for the shaft based on the signals. The processor is additionally configured to derive a power adjustment by executing at least one model. The processor is also configured to derive a corrected mechanical power by applying the power adjustment to the derived mechanical power; and to control the gas turbine system based on the corrected mechanical power.

Abstract: A device may receive operating information obtained by one or more sensors associated with plant equipment. The operating information may identify one or more operating parameters associated with operation of the plant equipment. The device may identify one or more portions of the operating information to be provided for parallel processing, and may prioritize the one or more portions for parallel processing based on a criticality of the plant equipment or a state of the plant equipment. The device may provide the one or more portions of the operating information for parallel processing based on the prioritization, and may determine one or more results associated with parallel processing of the one or more portions of the operation information. The device may provide the one or more results for display or to control operation of the plant equipment concurrently with operation of the plant equipment.

Abstract: A method using an inverse three-way valve model with feed-forward fuel flow control is provided for controlling liquid fuel flow in a turbine power generation system to achieve a bump-less driven watts (dwatt) power output during fuel mode transitions between passive mode and active mode operations of a three-way check valve that delivers liquid fuel to the turbine combustor nozzles. The method utilizes an inverse fluid flow model for a three-way check valve which is based upon a valve position surrogate for the three-way check valve to develop a calculated estimate of a fuel spike/dwatt oscillation likely to occur during mode transitions of the three-way check valve and to produce a feed-forward control used to modulate a fuel path bypass valve within the turbine fuel supply circulation system that provides the liquid fuel to the three-way valve during transfers of valve operation between passive and active mode operations.

Abstract: Embodiments of the disclosure are directed at determining rotor deterioration in a dynamoelectric machine. Various current and voltage measurements are carried out upon an exciter assembly when the dynamoelectric machine is operated at various speeds and at various occasions over an extended period of time. More particularly, a set of current and voltage measurements that are carried out when the dynamoelectric machine is in a slow-roll mode of operation can be used for determining a resistance of a current path through which the exciter assembly provides electrical power to a rotor assembly. A time-domain-to-frequency-domain conversion can be carried out upon this set of resistance measurements in order to generate a spectral signature. The spectral signature can then be evaluated to detect an altered rotor resistance condition and/or a rotor resistance alteration trend.

Abstract: An example method for analyzing big data in a network environment is provided and includes extracting a data set from big data stored in a network environment, detecting a pattern in the data set, and enabling labels based on the pattern, where each label indicates a specific condition associated with the big data, and the labels are searched to answer a query regarding the big data. In specific embodiments, detecting the pattern includes capturing gradients between each consecutive adjacent data points in the data set, aggregating the gradients into a gradient data set, dividing the gradient data set into windows, calculating a statistical parameter of interest for each window, aggregating the statistical parameters into a derived data set, and repeating the dividing, the calculating and the aggregating on derived data sets over windows of successively larger sizes until a pattern is detected.