An assembly according to an embodiment of the present disclosure includes, among other things, a synchronous machine including a rotating portion and a stationary portion, the rotating portion including at least one rotating diode coupled to a field winding, and the stationary portion including a stator winding and an exciter winding. A control unit includes a first gate and a second gate. The exciter winding is connected in series to the first gate and the second gate during a first operating mode to energize the exciter winding. The exciter winding is electrically connected in series to a first gate but is electrically disconnected from the second gate in a second, different operating mode to electrically disconnect the exciter winding from an exciter energy source. A method of operating a synchronous machine is also disclosed.

Systems and methods for dual voltage power generation are provided. Aspects include a generator having an input connected to an engine to receive rotational energy proportional to a rotation speed of a fan and having an output through which electrical energy is output, a rectifier circuit having an input coupled to the output of the generator and a rectifier output that outputs rectified power, a bypass switch connected to the output of rectifier and operates in a plurality of states including a normal operation state where the rectified power is provided a power converter and a bypass state where the rectified power is provided directly to a load, and a controller configured to determine an occurrence of an event associated with the engine, and operate the bypass switch in the bypass state based on the occurrence of the event associated with the engine.

The present disclosure is directed to turbine engines and systems for active stability control of rotating compression systems utilizing an electric machine operatively coupled thereto. In one exemplary aspect, an electric machine operatively coupled with a compression system, e.g., via a shaft system, is controlled to provide shaft damping for instability fluctuations of the pressurized fluid stream within the compression system. Based on control data indicative of a system state of the compression system, a control parameter of the electric machine is adjusted to control or change an output of the shaft system. Adjusting the shaft system output by adjusting one or more control parameters of the electric machine allows the compression system to dampen instability fluctuations of the fluid stream within the compression system. A method for active stability control of a compression system operatively coupled with an electric machine via a shaft system is also provided.

The present disclosure relates to methods (300) to determine a duration of a period for warming up of a power converter (20) of a wind turbine (1). The method (300) comprises determining (301) a first indicator that is indicative of a time that the power converter (20) has been inactive. Further, the method (300) comprises determining (302) the period for warming up at least partially based on the first indicator. A power converter assembly is also disclosed.

A method for controlling an inverter-based resource having a power converter connected to an electrical grid includes receiving, via a regulator of a controller of the inverter-based resource, a plurality of power signals. The method also includes determining, via the regulator, a power error signal as a function of the plurality of power signals. Further, the method includes receiving, via the regulator, a dynamic multiplier factor from a supervisory controller. Moreover, the method includes applying, via the regulator, the dynamic multiplier factor to one or more gains of the regulator to determine one or more modified gains. In addition, the method includes applying the one or more modified gains to the power error signal to obtain an intermediate power signal. Thus, the method includes generating, via the regulator, one or more control commands for the power converter as a function of the intermediate power signal.

A direct-current (DC) power generation system for a vehicle, a boosting shunt regulator, and a method of regulating the output of an AC generator with the boosting shunt regulator are provided. The boosting shunt regulator includes gated power switches electrically coupled between AC generator contacts and output contacts. A shunt operates the power switches at duty cycles selected to boost the AC voltages output by the AC generator.

The present application relates to a method for controlling a power system connected to a power grid, including: receiving a reactive power instruction and a measured reactive power from a generator; generating a reactive power error signal based on the difference between the reactive power instruction and the measured reactive power; receiving the reactive power error signal; generating a voltage instruction based on reactive power error signal; generating a voltage droop signal based on a reference reactance and a voltage at a point of common coupling; generating a voltage error signal according to at least one of the voltage instruction or the measured terminal voltage of the generator and the voltage droop signal; and producing a reactive current instruction for the converter power path based on the voltage error signal. The present application also discloses a control system for a power system connected to a power grid and a wind farm.

The system and method described herein provide control for a power generating asset having a double-fed generator connected to an electrical grid. Accordingly, a non-deliverable component and a deliverable component of a total power output of a generator of the power generating asset is determined via a controller. A compensation module of the controller then determines a first control signal based, at least in part, on the non-deliverable component. The first control signal is configured to establish a modified rotor current setpoint. Additionally, a buffer module of the controller then determines a buffer control signal for a DC energy buffer based, at least in part, on the non-deliverable component. The DC energy buffer is operably coupled between a line-side converter and a rotor-side converter of a power converter of the power generating asset. In response to the first control signal and the buffer control signal the non-deliverable component is delivered to the DC energy buffer via the line-side converter, thereby precluding the delivery of the non-deliverable component to or from the electrical grid. The deliverable component of the total power output of the generator is delivered to the electrical grid.

A generator system for connection to a vehicle axle. The generator system includes: an electrically-actuated clutch having an engaged position and a disengaged position; a generator and a processor. The generator includes: a rotor configured to be selectively connected, via the clutch, to the vehicle axle; and a stator. In the engaged position, the rotor is connected to the vehicle axle via the clutch such that torque from the vehicle axle is transmitted to the rotor. In the disengaged position, torque from the vehicle axle is not transmitted to the rotor. The processor is configured to control the clutch to actuate between the engaged and disengaged positions, and the processor is configured to monitor an electrical output of the generator, wherein the processor is configured to command the clutch to move to the disengaged position if the electrical output moves outside a predetermined range.

The system and method described herein provide grid-forming control of a power generating asset having a double-fed generator connected to a power grid. Accordingly, a stator-frequency error is determined for the generator. The components of the stator frequency error are identified as a torsional component corresponding to a drivetrain torsional vibration frequency and a stator component. Based on the stator component, a power output requirement for the generator is determined. This power output requirement is combined with the damping power command to develop a consolidated power requirement for the generator. Based on the consolidated power requirement, at least one control command for the generator is determined and an operating state of the generator is altered.