A floating electrical power generator having a three-dimensional (3D) flow passageway configured for increasing the water flow on the paddle wheel to increase the power output.

A system and method for controlling voltage of a DC link of a power converter of a wind turbine power system connected to a power grid includes operating the DC link to an optimum voltage set point that achieves steady state operation of the power converter. The method also includes monitoring a speed of the wind turbine power system. Upon detection of one or more speed conditions occurring in the wind turbine power system, the method includes selecting a first maximum voltage set point for the DC link or a second maximum voltage set point for the DC link. Moreover, the method includes increasing the optimum voltage set point to the selected first or second maximum voltage set point of the DC link. In addition, the method includes operating the DC link at the selected first or second maximum voltage set point until the one or more speed conditions passes so as to optimize voltage control of the DC link.

A floating electrical power generator having a three-dimensional (3D) flow passageway configured for increasing the water flow on the paddle wheel to increase the power output.

A method for operating a wind turbine includes: determining a value of a wind speed of an incident air mass at the wind turbine; if the determined value of the wind speed is greater than a first threshold value for the wind speed: reducing a rotational speed of a rotor of the wind turbine, and maintaining or increasing a generator torque acting upon the rotor; if the determined value of the wind speed is greater than a second threshold value for the wind speed, the second threshold value being greater than the first threshold value: reducing the rotational speed of the rotor, and reducing the generator torque acting upon the rotor.

A floating power generator having a water wheel and electrical generator. The floating power generator can comprise a variable speed drive.

The present subject matter is directed to a system and method for operating a wind turbine so as to increase power production by utilizing variable tip-speed-ratio control. In one embodiment, the method includes defining a first operating region associated with an unsaturated torque range and a second operating region associated with a saturated torque range. Further, the method includes monitoring a torque output of the wind turbine. The method also includes continuously adjusting a tip-speed-ratio set point of the wind turbine so as to operate the wind turbine along a torque constraint boundary of the first and second operating regions.

A method for operating a wind turbine, includes: determining a value of a wind speed of an incident air mass at the wind turbine; if the determined value of the wind speed is greater than a first threshold value for the wind speed: reducing a rotational speed of a rotor of the wind turbine, and maintaining or increasing a generator torque acting upon the rotor; if the determined value of the wind speed is greater than a second threshold value for the wind speed, the second threshold value being greater than the first threshold value: reducing the rotational speed of the rotor, and reducing the generator torque acting upon the rotor.

A wind turbine and operating method include a double-fed induction generator with a generator rotor and a generator stator, a power conversion assembly having respective rotor-side and line-side power converters, and a load. The generator rotor is coupled to the rotor-side power converter. The line-side power converter and the load are coupled to a grid via a low voltage winding of a transformer. A first sum of a rated current of the generator rotor and a rated current of the load is more than an upper current limit of the low voltage winding. When operating the generator at a sub-synchronous speed, a first current is provided to the generator rotor that is less than a normal generator rotor current, and a second current is provide to the load, wherein a second sum of the first current and the second current is equal to or less than the upper current limit of the low voltage winding.

Embodiments herein describe optimizations for hybrid power plants that include wind turbine generators and photovoltaic generators by determining solar tracking setpoints for a field of photovoltaic generators co-located with a wind turbine generator, wherein the solar tracking setpoints orient a collector face for each photovoltaic generator sunward; in response to determining based on data received from the wind turbine generator that an airborne impactor event is occurring, adjusting the solar tracking setpoints to reposition the collector face out of a trajectory for airborne impactors; and transmitting the setpoints to tracking motors for the photovoltaic generators of the field.

Systems for increasing the power productivity of two bladed teetering hinge, yaw controlled wind turbines by varying rotor shaft restraining torque and yaw angle.