The present disclosure is directed to an ultracapacitor module comprising a housing and terminals, the terminals exposed through the housing, the housing containing one or more internal capacitor cells and one or more integrated, internal bypass diodes arranged together such that the ultracapacitor module additionally comprises an integrated, internal bypass circuit connected in parallel with the terminals. The present disclosure also is directed to an ultracapacitor module comprising a housing and terminals, the terminals exposed through the housing, the housing containing one or more internal capacitor cells and at least one set of one or more integrated, internal bypass diodes connected in parallel to the at least one or more internal capacitor cells, such that the ultracapacitor module additionally comprises an integrated, internal bypass circuit.

A method of operating a wind energy installation wherein a rotor has a first rotor blade which can be angularly adjusted, a first adjustment drive for adjusting the rotor blade, and a safety control system. In a normal mode of operation, the first adjustment drive is supplied with energy from a source and is controlled by a first pitch control system. In a failure mode of operation, the supply of energy to the first adjustment drive is switched from the source to an energy storage device and the safety control system monitors a position and/or movement of the first rotor blade. The first rotor blade is adjusted by the first adjustment drive in a direction of a predetermined stopping position, while the safety control system, as a function of the monitored position and/or movement, enables or effects a deactivation of a first power supply shut-off device. In the failure mode of operation, the safety control system, as a function of the monitored position and/or movement, closes a first pitch brake and activates a first blocking mode in which the supply of energy to the first adjustment drive from the energy storage device and/or an opening of the first pitch brake is prevented.

An ocean power plant for converting slow water flow energy with a turbine comprising at least one endless rotation chain (4) with a plurality of plate holders (2) along the rotation chain where the plate holder comprises at least one plate (1) attached in each plate holder, further, the rotation chain running in an extended lane around and engaging at least one drive wheel (5) in the one end arch of the web tiltably attached to the plate holder to alternate between open position with the primary flow direction of the water flow, and closed position towards the flow direction, and the drive wheel has a turbine shaft (7) coupled to a generator device (G), an electrical generator or a converter of the rotational energy to hydraulics or other type of mechanical or potential energy, for the utilization of the rotational energy, furthermore the path of the rotary chain (4) is tilted relative to the main flow direction of the water flow, all arranged in a fully or partially submersible support structure (100).

A hydraulic circuit for a wind turbine is provided. The hydraulic circuit includes: a fixed displacement pump including a suction input and a delivery output, a pump motor for driving the fixed displacement pump, a pressure line hydraulically connected to the delivery output of the fixed displacement pump for delivering an output flow and/or an output pressure generated by the fixed displacement pump towards at least a consumer circuit, a bypass valve including a valve input hydraulically connected to the delivery output of the fixed displacement pump, wherein the bypass valve includes a variable opening for controlling the output flow or the output pressure delivered by the fixed displacement pump towards the consumer circuit(s).

In a vertical rotor apparatus that rotates in response to a moving fluid, a shaft defines an axis of rotor rotation. Rotor blades are longitudinally aligned in parallel with the shaft and each rotor blade defines an axis of blade rotation. A sensor generates a signal when any of the rotor blades are within rotor azimuthal angles of blade stall regions. A controller generates blade pitch information for the blade stall regions and an actuator, which is mechanically coupled to each of the rotor blades, alters blade pitch about the axis of blade rotation in accordance with the blade pitch information.

In a vertical rotor apparatus that rotates in response to a moving fluid, a shaft defines an axis of rotor rotation. Rotor blades are longitudinally aligned in parallel with the shaft and each rotor blade defines an axis of blade rotation. A sensor generates a signal when any of the rotor blades are within rotor azimuthal angles of blade stall regions. A controller generates blade pitch information for the blade stall regions and an actuator, which is mechanically coupled to each of the rotor blades, alters blade pitch about the axis of blade rotation in accordance with the blade pitch information.

A method of operating a wind energy installation wherein a rotor has a first rotor blade which can be angularly adjusted, a first adjustment drive for adjusting the rotor blade, and a safety control system. In a normal mode of operation, the first adjustment drive is supplied with energy from a source and is controlled by a first pitch control system. In a failure mode of operation, the supply of energy to the first adjustment drive is switched from the source to an energy storage device and the safety control system monitors a position and/or movement of the first rotor blade. The first rotor blade is adjusted by the first adjustment drive in a direction of a predetermined stopping position, while the safety control system, as a function of the monitored position and/or movement, enables or effects a deactivation of a first power supply shut-off device. In the failure mode of operation, the safety control system, as a function of the monitored position and/or movement, closes a first pitch brake and activates a first blocking mode in which the supply of energy to the first adjustment drive from the energy storage device and/or an opening of the first pitch brake is prevented.

A system and method are provided for applying a pitch motor braking torque to a rotor blade. Accordingly, of the pitch control system from a 1.sup.st operational mode to an emergency operational mode is initiated. The pitch motor of the pitch control system having an absence of supply current during the transition. A short-circuit is established across the Armature of the pitch motor so as to establish a current flow. The current is generated by the pitch motor in response to rotation of the rotor blade about the pitch axis when the pitch motor has the absence of supply current. In response to the current flow being generated, generating a braking torque in a single direction with the pitch motor so as to allow the rotor blade to move freely to a lesser loaded orientation relative to an original orientation to protect the wind turbine from damage.

A power management module and method for controlling power consumption of consumers in a wind turbine system. Each power management module in the wind turbine system is configured to determine a voltage level of a power supply bus of the wind turbine system and then control a level of power consumption of one or more consumers coupled to the power supply bus based at least in part on the determined voltage level of the power supply bus. Power consumption may thereby be managed throughout the wind turbine system, without requiring a dedicated centralised controller and communications infrastructure.

This method is for orientating the blades (40) of a turbine (4) past a non-reachable range of positions (α1, α2) in a power plant (2), said blades (40) being rotatable around orientation axes (X40) distinct from a rotation axis (X) of the turbine (4), the turbine (4) comprising means (42, 44, 46) for orientating the blades (40), said means being adapted to exert an adjustable torque on the blades (40). The method comprises steps consisting in a) stopping the energy production of the turbine (4), b) setting a water flow which runs the turbine (4) to a value inferior to a normal energy production value, c) rotating the turbine (4) in a motor mode using energy from a grid, d) adjusting the torque delivered by the means for orientating the blades (40) to a reduced value while the turbine (4) is still rotating, so that the blades (40) are free to rotate around their orientation axes (X40), under action of a hydraulic torque exerted by the water, past the non-reachable range of positions, e) once the blades (40) have overcome the non-reachable range of positions, adjusting the torque delivered by the means for orientating the blades (40) to a normal value superior to the reduced value, so that the rotation of the blades (40) around their orientation axis (X40) is stopped in a determined position.