Abstract: A method for operating a generator of a wind turbine includes generating, via a controller, a time series of a plurality of operating signals of the generator. The method also includes applying at least one algorithm to the time series of the plurality of operating signals of the generator to generate a processed time series of the of the plurality of operating signals of the generator. Moreover, the method includes identifying, via the controller, patterns in the processed time series of the plurality of operating signals of the generator to identify one or more of at least one slip event occurring in the slip coupling or a surface health of the slip coupling. Further, the method includes implementing, via the controller, a control action when the at least one slip event occurring in the slip coupling is identified or the surface health of the slip coupling is indicative of degradation in the slip coupling.

Abstract: Systems and methods are disclosed for improved fault diagnostics of electrical machines under dynamic load oscillations. The systems and methods may rely on one or more different algorithms for performing such fault diagnostics. One example, algorithm may involve determining a ratio of an instantaneous real power and a reactive power of the motor.

Abstract: A method for preventing damage in a bearing of a generator of an electrical power system includes monitoring one or more electrical signals of a power conversion assembly of the electrical power system. The method also includes estimating an impedance path of common mode current from a terminal to ground using the operating parameter(s) of the power conversion assembly. Further, the method includes determining a one or more magnitudes and/or a one or more phase angles of the impedance path at different frequencies, such a switching frequency and/or harmonics. Moreover, the method includes determining whether the impedance path is indicative of degradation in at least one of bearing insulation or a ground brush of the generator based on a change in the one or more magnitudes and/or the one or more phase angles. In addition, the method includes implementing a control action when the impedance path is indicative of degradation in the bearing insulation and/or the ground brush of the generator.

Abstract: A method for preventing damage in a bearing of a generator includes monitoring, via a controller, one or more electrical signals of the power conversion assembly. The method also includes converting the electricals signal(s) to a frequency domain. Further, the method includes extracting one or more spectral components in frequency bands of the frequency domain around one or more known characteristic frequencies of the bearing. Moreover, the method includes determining at least one characteristic of the spectral component(s) in the frequency bands. In addition, the method includes comparing the characteristic(s) of the spectral component(s) in the frequency bands to at least one baseline value. The method further includes generating a fault signal or a baseline signal for the bearing based on the comparison. In response to the fault signal being generated, the method includes implementing a control action.

Abstract: A system includes a generator coupled to an engine and configured to generate electricity from rotational movement of a shaft of the engine, a motor configured to be driven by the generator through one or more power conversion components, the motor configured to drive a load, a sensor configured to measure generator output, and a controller configured to detect engine imbalance based on a frequency content of a signal output from the sensor in response to a contribution to the frequency content from the one or more power conversion components and/or the load of the motor being less than a threshold value.

Abstract: A method for operating a generator of a wind turbine includes generating, via a controller, a time series of a plurality of operating signals of the generator. The method also includes applying at least one algorithm to the time series of the plurality of operating signals of the generator to generate a processed time series of the of the plurality of operating signals of the generator. Moreover, the method includes identifying, via the controller, patterns in the processed time series of the plurality of operating signals of the generator to identify one or more of at least one slip event occurring in the slip coupling or a surface health of the slip coupling. Further, the method includes implementing, via the controller, a control action when the at least one slip event occurring in the slip coupling is identified or the surface health of the slip coupling is indicative of degradation in the slip coupling.

Abstract: A method for preventing damage in a bearing of a generator includes monitoring, via a controller, one or more electrical signals of the power conversion assembly. The method also includes converting the electricals signal(s) to a frequency domain. Further, the method includes extracting one or more spectral components in frequency bands of the frequency domain around one or more known characteristic frequencies of the bearing. Moreover, the method includes determining at least one characteristic of the spectral component(s) in the frequency bands. In addition, the method includes comparing the characteristic(s) of the spectral component(s) in the frequency bands to at least one baseline value. The method further includes generating a fault signal or a baseline signal for the bearing based on the comparison. In response to the fault signal being generated, the method includes implementing a control action.

Abstract: A method for preventing damage in a bearing of a generator of an electrical power system includes monitoring one or more electrical signals of a power conversion assembly of the electrical power system. The method also includes estimating an impedance path of common mode current from a terminal to ground using the operating parameter(s) of the power conversion assembly. Further, the method includes determining a one or more magnitudes and/or a one or more phase angles of the impedance path at different frequencies, such a switching frequency and/or harmonics. Moreover, the method includes determining whether the impedance path is indicative of degradation in at least one of bearing insulation or a ground brush of the generator based on a change in the one or more magnitudes and/or the one or more phase angles. In addition, the method includes implementing a control action when the impedance path is indicative of degradation in the bearing insulation and/or the ground brush of the generator.

Abstract: A power system including at least one electrical machine, plurality of doubly fed induction machines (DFIMs), a plurality of first power converters, and a speed regulation unit is presented. The electrical machine includes a mechanical input end and at least one of a first stator winding terminal and a first rotor winding terminal. Each DFIM includes a second stator winding terminal, a second rotor winding terminal, and a mechanical output end. At least one of the first stator winding terminal and the first rotor winding terminal is coupled to one of first power converters and the second rotor winding terminal of each DFIM is coupled to one of the first power converters. The speed regulation unit is coupled to at least one of the mechanical input end and the mechanical output end.

Abstract: A power system including at least one electrical machine, plurality of doubly fed induction machines (DFIMs), a plurality of first power converters, and a speed regulation unit is presented. The electrical machine includes a mechanical input end and at least one of a first stator winding terminal and a first rotor winding terminal. Each DFIM includes a second stator winding terminal, a second rotor winding terminal, and a mechanical output end. At least one of the first stator winding terminal and the first rotor winding terminal is coupled to one of first power converters and the second rotor winding terminal of each DFIM is coupled to one of the first power converters. The speed regulation unit is coupled to at least one of the mechanical input end and the mechanical output end.

Abstract: Methods and systems are provided for an engine. A condition of the engine may be diagnosed based on information provided by signals from a generator operationally connected to the engine and/or other signals associated with the engine. Different types of degradation may be distinguished based on discerning characteristics within the information. Thus, a degraded engine component may be identified in a manner that reduces service induced delay.

Abstract: A system includes a generator coupled to an engine and configured to generate electricity from rotational movement of a shaft of the engine, a motor configured to be driven by the generator through one or more power conversion components, the motor configured to drive a load, a sensor configured to measure generator output, and a controller configured to detect engine imbalance based on a frequency content of a signal output from the sensor in response to a contribution to the frequency content from the one or more power conversion components and/or the load of the motor being less than a threshold value.

Abstract: A system includes a generator coupled to an engine and configured to generate electricity from rotational movement of a shaft of the engine, a sensor configured to measure one or more of a parameter of generator output, engine speed, or engine shaft torque, and a controller configured to detect engine imbalance based on a frequency content of a signal output from the sensor in response to a contribution to the frequency content from another component of the system being less than a threshold value.

Abstract: A locomotive control system measures actuating parameters of a locomotive propulsion system and monitors the actuating parameters according to a forcing function of operation of the propulsion system. A degraded component of the locomotive is identified by comparing actuating parameters generated according to the forcing function with actuating parameters expressed as a function of speed of another locomotive propulsion system, examining changes in the generated actuating parameters over time, examining oscillations in movement of the locomotive during gear shifting, comparing wheel speed decreases during another forcing function, and/or comparing a magnitude of a spectrum of the actuating parameters of with one or more designated magnitudes.

Abstract: Methods and systems are provided for an engine. A condition of the engine may be diagnosed based on information provided by signals from a generator operationally connected to the engine and/or other signals associated with the engine. Different types of degradation may be distinguished based on discerning characteristics within the information. Thus, a degraded engine component may be identified in a manner that reduces service induced delay.

Abstract: Methods and systems are provided for an engine. A condition of the engine may be diagnosed based on information provided by signals from a generator operationally connected to the engine and/or other signals associated with the engine. Different types of degradation may be distinguished based on discerning characteristics within the information. Thus, a degraded engine component may be identified in a manner that reduces service induced delay.

Abstract: A system includes a generator coupled to an engine and configured to generate electricity from rotational movement of a shaft of the engine, a sensor configured to measure one or more of a parameter of generator output, engine speed, or engine shaft torque, and a controller configured to detect engine imbalance based on a frequency content of a signal output from the sensor in response to a contribution to the frequency content from another component of the system being less than a threshold value.

Abstract: Diagnosing equipment coupled to a generator. A condition of the equipment is diagnosed based on information provided by signals from a generator operationally connected to the equipment or other signals associated with an engine. Different types of degradation are distinguished based on discerning characteristics within the information. Thus, a degraded equipment component can be identified in a manner that reduces service induced delay.

Abstract: Diagnosing equipment coupled to a generator. A condition of the equipment is diagnosed based on information provided by signals from a generator operationally connected to the equipment or other signals associated with an engine. Different types of degradation are distinguished based on discerning characteristics within the information. Thus, a degraded equipment component can be identified in a manner that reduces service induced delay.

Abstract: A method of monitoring health of a mechanical drive train is provided. The method includes obtaining voltage and current signals from at least one phase of an electrical machine coupled with the mechanical drive train. The method also includes representing the electrical machine having a non-sinusoidal flux distribution as a combination of a plurality of harmonic order sinusoidally distributed virtual electrical machines based on the obtained voltage and current signals. The method further includes determining a torque profile associated with one or more combinations of the sinusoidally distributed virtual electrical machines. Finally, the method includes detecting the presence of an anomaly in the mechanical drive train based on the torque profile or spectrum.