A system is provided comprising a tunnel for immersion in a moving mass. Energy from the mass passing through said tunnel converts to rotational force. An energy collector is provided having open and collapsed states, the open state resisting the mass. Bidirectional converter systems convert said rotational force to constant singular direction. A mechanical converter comprises an input shaft turned bidirectionally by said rotational force and two gears driven by the input shaft in opposite rotational directions, the gears separately attached to idler gears causing output gears attached to the idler gears to engage an output shaft in a same rotational direction. A hydraulic converter comprises a hydraulic pump turned bidirectionally by said rotational force. Check valves positioned between the pump and a hydraulic motor enable control of pressure and volume in one direction at the pump.

A winch for a power generating system using a tethered airborne device, the winch comprising a drum rotatable about its main axis a guiding apparatus arranged to guide an airborne device tether to wind and unwind around the drum; wherein the drum is rotatable relative to a pivot point to move in a first plane and the guiding apparatus is disposed relative to the drum to move along part of an orbital path around the drum in a second plane substantially perpendicular to the main axis of the drum, thereby allowing alignment of the winch with respect to an unwound length of the tether.

The present invention relates a wind power generation system using an airship, which can generate wind power using strong wind of a jet stream by using the airship, convert the wind power into a laser beam and transmit the laser beam to the ground so that power can be produced on the ground by converting the laser beam into electricity. The present invention provides efficiency and convenience in collecting power of the airship on the ground by implementing a wind power generation system using an airship to include: an airship for producing power through wind power generation while floating in the air and transmitting the produced power as a laser beam; and a ground receiving unit for receiving the laser beam transmitted. from the airship and converting the laser beam into electricity.

Disclosed herein is a wind power generation system using a dynamic lift generation disk structure unlike a horizontal-axis wind turbine(HAWT) or vertical-axis wind turbine(VAWT) which uses blades. The wind power generation system includes a column and an oscillating unit. The oscillating unit includes a donut shape wing(disk) surrounding the column, which can convert kinetic energy into electric energy when the unit is moving up or down by dynamic lift.

A piezoelectric power generator using wind power is provided. To elaborate, the piezoelectric power generator has a central axis unit with a charger, a piezoelectric film supporting frame engaged onto an outer circumference surface of the central axis unit, and a piezoelectric film having a pre-set area and at least one side engaged to at least one of one side part of the piezoelectric supporting frame and the central axis unit. In addition, the piezoelectric film supporting frame has a shape corresponding to a shape of an edge of the piezoelectric film to surround the edge of the piezoelectric film.

A kite for a system for extracting energy from the wind, the kite comprising: a body having a wing for providing lift; means for connecting the wing to a tether; and means for controlling the flight of the kite in the wind, wherein the wing is constructed with an asymmetry in a spanwise direction from a first end of the wing to a second end of the wing to provide the wing with a naturally asymmetric shape at least when in flight. The asymmetry may be provided to optimise the shape of the wing for a flight pattern in which one end of the wing has a higher speed than the other end of the wing. For example, the asymmetry may be optimised to allow the kite to follow a flight pattern resembling a circle or spiral, from the point of view of a base unit of the system.

An aerial vehicle including a fuselage, a main wing attached to the fuselage, a support structure extending upwardly from the fuselage and having a front surface facing the main wing, an overhang positioned on a top of the support structure and extending towards the main wing, one or more rotating actuators positioned on the overhang, a rear elevator attached to the one or more rotating actuators that are configured to move the rear elevator from a flying mode position where a leading edge of the rear elevator faces the main wing to a hover mode position where the major surfaces of the rear elevator faces the main wing, and wherein the major surfaces of the rear elevator remain in front of the front surface of the support structure when the rear elevator is moved from the flying mode position to the hover mode position.

Methods and systems described herein relate to power generation control for an aerial vehicle. An example method may involve determining an asynchronous flight pattern for two or more aerial vehicles, where the asynchronous flight pattern includes a respective flight path for each of the two or more aerial vehicles; and operating each of the aerial vehicles in a crosswind flight substantially along its respective flight path, where each aerial vehicle generates electrical power over time in a periodic profile, and where the power profile of each aerial vehicle is out of phase with respect to the power profile generated by each of the other aerial vehicles.

A power generation apparatus and method comprises at least one gyroglider rotary wing flying at an altitude above the nap of the earth. A strong and flexible tether, connected to the gyroglider frame is pulled with a force generated by the rotary wing. The force is transmitted to a ground station that converts the comparatively linear motion of the tether being pulled upward with a lifting force. The linear motion is transferred to a rotary motion at the ground station to rotate an electrical generator. The tether is retrieved and re-coiled about a drum by controlling the gyroglider to fly down at a speed and lift force that permit recovery of the gyroglider at a substantially reduced amount of retrieval force compared to the lifting force during payout of the tether. Thus, the net difference in force results in a net gain of energy.

The present invention relates to a method for controlling airborne wind energy systems (AWES), e.g. with kites, in a wind energy park connected to an electrical grid. By appropriately controlling these AWES to produce electrical power to the electrical grid by alternating between a power production phase and a recovery phase by cable control or changing kite aerodynamics, it is possible to better balance the supply of the net power production to the electrical grid. In this way, the invention may stabilize the electrical grid and can have a grid forming capability. Furthermore, the wind energy park may stabilize the grid during a fault ride-through (FRT) event.