Abstract: A system and method are provided for operating a power generating asset. Accordingly, a controller detects a fault condition impacting the power generating asset. The controller then determines whether the fault condition is occurring in the power generating asset or is occurring in the power grid. When the fault condition is occurring in the power generating asset, a first response control scheme is implemented. However, when the fault condition is occurring in the power grid, a second response control scheme is implemented. The response control schemes include a first current threshold and a second current threshold respectively, with first current threshold being less than the second current threshold. Additionally, a control action is implemented in response to an approach of a current to the respective current threshold.

Abstract: A system and method are provided for controlling low-speed operations of a wind turbine electrically coupled to an electrical grid. The wind turbine includes a generator and a power converter. The generator includes a generator rotor and a generator stator. An operating parameter of the generator rotor is indicative of a low-speed operation of the generator. Accordingly, the crossing of a first threshold by the operating parameter is detected. In response, at least a portion of a required reactive power generation is developed via the generator rotor. The portion is then delivered to the electrical grid via the grid side of the power converter.

Abstract: A system and method are provided for controlling a wind turbine. Accordingly, a controller of the wind turbine detects a loss of traction of the slip coupling between a generator and a rotor of the drivetrain of the wind turbine. In response to detecting the loss of traction, the controller overrides a generator torque setpoint to alter a rotational speed of the generator. In response to the altered rotational speed of the generator, the traction of the slip coupling is increased. Increasing the traction of the slip coupling facilitates an application of generator torque to the drivetrain of the wind turbine.

Abstract: A system and method are provided for controlling a wind turbine to protect the wind turbine from anomalous operations. Accordingly, in response to receiving data indicative of an anomalous operational event of the wind turbine, the controller initiates an enhanced braking mode for the wind turbine. The enhanced braking mode is characterized by operating the generator at a torque setpoint that generates maximum available torque for a given set of operating conditions. Additionally, the torque setpoint is in excess of a nominal torque limit for the generator.

Abstract: A system and method are provided for controlling low-speed operations of a wind turbine electrically coupled to an electrical grid. The wind turbine includes a generator and a power converter. The generator includes a generator rotor and a generator stator. An operating parameter of the generator rotor is indicative of a low-speed operation of the generator. Accordingly, the crossing of a first threshold by the operating parameter is detected. In response, at least a portion of a required reactive power generation is developed via the generator rotor. The portion is then delivered to the electrical grid via the grid side of the power converter.

Abstract: A system and method are provided for operating a power generating asset. Accordingly, a controller detects a fault condition impacting the power generating asset. The controller then determines whether the fault condition is occurring in the power generating asset or is occurring in the power grid. When the fault condition is occurring in the power generating asset, a first response control scheme is implemented. However, when the fault condition is occurring in the power grid, a second response control scheme is implemented. The response control schemes include a first current threshold and a second current threshold respectively, with first current threshold being less than the second current threshold. Additionally, a control action is implemented in response to an approach of a current to the respective current threshold.

Abstract: A system and method are provided for controlling a wind turbine. Accordingly, a controller of the wind turbine detects a loss of traction of the slip coupling between a generator and a rotor of the drivetrain of the wind turbine. In response to detecting the loss of traction, the controller overrides a generator torque setpoint to alter a rotational speed of the generator. In response to the altered rotational speed of the generator, the traction of the slip coupling is increased. Increasing the traction of the slip coupling facilitates an application of generator torque to the drivetrain of the wind turbine.

Abstract: A method for operating a power generation system that supplies real and reactive power to a grid includes receiving a reactive power demand made on the power generation system at an operating state of the power generation system and a grid state. Further, the method includes decoupling reactive power control and voltage control between a generator and a reactive power compensation device so as to reduce an oscillatory response of a reactive power output from the reactive power compensation device and the generator. Moreover, the method includes operating, via a device controller, the reactive power compensation device in a reactive power control mode to generate at least a portion of the reactive power demand.

Abstract: A system and method are provided for controlling a wind turbine to protect the wind turbine from anomalous operations. Accordingly, in response to receiving data indicative of an anomalous operational event of the wind turbine, the controller initiates an enhanced braking mode for the wind turbine. The enhanced braking mode is characterized by operating the generator at a torque setpoint that generates maximum available torque for a given set of operating conditions. Additionally, the torque setpoint is in excess of a nominal torque limit for the generator.

Abstract: A method for operating a power generation system that supplies real and reactive power to a grid includes receiving a reactive power demand made on the power generation system at an operating state of the power generation system and a grid state. Further, the method includes decoupling reactive power control and voltage control between a generator and a reactive power compensation device so as to reduce an oscillatory response of a reactive power output from the reactive power compensation device and the generator. Moreover, the method includes operating, via a device controller, the reactive power compensation device in a reactive power control mode to generate at least a portion of the reactive power demand.

Abstract: A method for operating a renewable energy power system connected to a power grid includes operating the renewable energy power system at one or more first operational settings. The method also includes monitoring the renewable energy power system for electrical oscillations caused by a grid or system disturbance. In response to detecting the electrical oscillations being above a predetermined threshold indicative of the one or more first operational settings no longer being suitable for grid conditions, the method includes changing the one or more first operational settings to one or more different, second operational settings so as to reduce the electrical oscillations in the renewable energy power system.

Abstract: Systems and methods for protecting switching devices in a power converter in doubly fed induction generator power systems are provided. A DFIG system can include a DFIG generator and a power converter comprising a line side converter and a rotor side converter connected by a DC bus. Each of the line side converter and rotor side converter can include a plurality of bridge circuits. Each bridge circuit can include a plurality of switching devices. A method can include monitoring, by a control device, a voltage of the DC bus of the power converter. The method can further include implementing, by the control device, a switching device protection measure based at least in part on the voltage of the DC bus of the power converter. The switching device protection measure can be operable to protect the switching devices by operating the switching devices within a safe operating area.

Abstract: Systems and methods for protecting switching devices in a power converter in doubly fed induction generator power systems are provided. A DFIG system can include a DFIG generator and a power converter comprising a line side converter and a rotor side converter connected by a DC bus. Each of the line side converter and rotor side converter can include a plurality of bridge circuits. Each bridge circuit can include a plurality of switching devices. A method can include monitoring, by a control device, a voltage of the DC bus of the power converter. The method can further include implementing, by the control device, a switching device protection measure based at least in part on the voltage of the DC bus of the power converter. The switching device protection measure can be operable to protect the switching devices by operating the switching devices within a safe operating area.

Abstract: The present disclosure is directed to an electrical cabinet for an electrical assembly for a wind turbine. The electrical cabinet has one or more walls that define an internal volume having one or more electrical components configured therein. One or more of the walls includes an inner panel and an outer panel mounted to the inner panel. The inner panel includes an inner vent and the outer panel includes an outer vent. Further, the panels are arranged together so as to define a flow path between the inner and outer vents. Thus, during normal operation, air is directed from outside of the electrical cabinet to the internal volume of the electrical cabinet via the flow path so as to cool the one or more electrical components. Further, during a fault event, gas is permitted to exit the internal volume of the electrical cabinet via the flow path.

Abstract: The present disclosure is directed to an electrical cabinet for an electrical assembly for a wind turbine. The electrical cabinet has one or more walls that define an internal volume having one or more electrical components configured therein. One or more of the walls includes an inner panel and an outer panel mounted to the inner panel. The inner panel includes an inner vent and the outer panel includes an outer vent. Further, the panels are arranged together so as to define a flow path between the inner and outer vents. Thus, during normal operation, air is directed from outside of the electrical cabinet to the internal volume of the electrical cabinet via the flow path so as to cool the one or more electrical components. Further, during a fault event, gas is permitted to exit the internal volume of the electrical cabinet via the flow path.