WO2014040716A1

WO2014040716A1 - Flight-based wind power plant with multiple cables operating on the yoyo principle

Info

Publication number: WO2014040716A1
Application number: PCT/EP2013/002689
Authority: WO
Inventors: Peter KÖVESDI; Bernhard KÄMPF; Christian Gebhardt
Original assignee: Enerkite Gmbh
Priority date: 2012-09-13
Filing date: 2013-09-07
Publication date: 2014-03-20

Abstract

The invention relates to a flight-based wind power plant for generating electrical energy by means of a tethered flying apparatus, with at least one main cable and at least one control cable, which lead from the ground to the flying apparatus, wherein mechanical power is diverted from the drive strand of at least one main cable to at least one actuator strand, and this part of the power is combined with the mechanical power of the respective actuator by means of a summation gear mechanism and transferred to the respective control cable.

Description

Flying wind turbine with several ropes in YoYo mode

The invention relates to a flying wind turbine for generating electrical energy by means of a tethered aircraft, in particular a kite or a kite-like construction, with at least one main rope and a control cable leading from the ground to the aircraft, the cables operate in YoYo mode and mechanically generated power from Drive train at least one main rope to at least one

Is branched off actuator drive, this power unit with the mechanical power of the respective actuator by means of a summation, preferably one as

Summing gear working planetary gear, superimposed and transferred to the respective control cable, so that it succeeds to perform the control of the aircraft from the mechanical energy production by the up and dismounting of the aircraft in YoYo operation separated from each other.

Background of the Invention: For some time now, novel wind turbines have been developed which do not rely on soil-solid structures such as e.g. Towers and masts are bound, but convert the wind energy by means of tethered aircraft into mechanical and electrical energy. The advantages of such systems are mainly that the high energy supply and the high

Uniformity of wind at altitudes well above 300 m at lower cost is achievable. Wind energy plants, which have a rotor on a floor-solid structure, are carried out with current status not greater than 200 m total height for both technical and economic reasons. The cost of the tower structure form a significant part of the total cost and accounts for flying wind turbines. In addition, it is possible for flying wind turbines to lower relative costs to interpret the system to higher rated wind availability than in wind turbines with bottom strength, resulting in a further cost advantage.

There are several different concepts of such wind turbines. Known are those that convert the wind energy already in the aircraft into electrical energy and conduct through a current-carrying cable to the ground, for example from US20100295303. Furthermore, there are concepts in which a movable ground station is towed by the aircraft over a trajectory or a stretch on the ground, eg European Patent EP2075461 B1, as well as concepts in which a rotor located on the ground with a vertical axis by the pulling dragon by means of a rope fixed length is set in rotation. Another known possibility is to gain mechanical energy by means of the YoYo principle. One of the challenges of a system with YoYo operation is that the rope drives in the ground station have to convert their power over as high a rope speed range as the overall efficiency of the system depends strongly on the speed ratio between catch-up phase 2 and extension phase 1. The optimal speed ratio is different from the aerodynamic difference

Characteristics and trajectory of the aircraft between phases 2 and 1 and is 10: 1 or more in sophisticated aircraft. This high

Speed range is with speed-spread special drives or through

Oversizing the drives achievable.

All the main and control cables of the aircraft shall perform the YoYo operation at the same speed, apart from the relative control movements. The required power for the common skipping and retrieving of all ropes is high in each individual rope drive, the required accuracy and dynamics for this relatively low. For the

Actuating motion is the required power relatively low, while the required accuracy and dynamics is relatively high. It is therefore problematic if the drives of the control cables in addition to the adjusting movement should also cause their omission and retrieval, since these drives then have to deliver relatively high performance over a large speed range with high accuracy and dynamics. This leads to high costs and in the case of problem solving by oversizing also to high inertia in the respective drive trains.

From document EP2091809B1 a solution is known in which strictly differential,

opposing tax movements between two ropes by means of its own

Actuator can be performed while common outlet / catching movements of the control cables are taken over by another drive. In this case, however, it is not possible to effect an adjustment movement of the control cables independently of one another or jointly in the same direction (for example relative to a third cable) by means of said actuator. In the embodiment proposed there, in which intervenes with linearly moving pulleys in the control cables, beyond large cable guide problems due to relatively long free Seiltrume be expected in conjunction with the high dynamic range of the linear movement to be achieved. Furthermore, the maximum possible path of the relative positioning movements due to the inevitable

Limited range of linear movement of the pulleys limited. The range of motion of the aircraft may not be limited unnecessarily in wind turbines. For reasons of operational management and safety, all maneuvers in the full half space above the ground station must be possible under any wind directions and strengths. In the document US8080889 a ground station is described in which the pulleys, which direct the cables to the wing, are rotatably mounted on springs. Furthermore, among others, from the sailing port deflection roller blocks are known in which the deflection roller is mounted pivotably about an axis transverse to its direction of rotation.

Both systems mentioned above allow automatic alignment of the pulley in the direction of the expiring rope. In a multi-roped system, however, problems with small vertical angles of the ropes to the ground and large horizontal angles of the ropes to the ground axis of the ground station are to be expected since at least one rope may collide with the rope outlet of at least one of the other ropes. On the other hand, both systems only work with a rope under a certain minimum force, since the force for aligning the deflection means in both systems must be applied by the rope itself. However, it can not be assumed in every operating situation of flying wind power plants that all ropes are under sufficient force for this purpose.

Flying wind turbines can have a high level of operational reliability and a large

Operating area with regard to environmental conditions. Nevertheless, a lasting economic operation is only possible if a fully automatic start and landing system is implemented. For this purpose, a system has already been described which includes an arm which is rotatably mounted about a substantially vertical axis of rotation, which is at an angle to the arm longitudinal axis, and from the sufficient

Distance from the axis of rotation exits at least one rope, the end of which is connected to the aircraft. By a sufficiently large radius of orbit of the exit point from the arm of the aircraft can be impressed on its own speed, by means of which it generates enough lift to be allowed to go up to greater heights by skipping the connecting cable and / or reducing the angle between arm longitudinal axis and the vertical. A reverse landing is possible: the aircraft is controlled on a cyclic path around the landing gear while the arm rotates at approximately the same average angular velocity. By pulling in the rope or ropes, the aircraft can be used on the landing gear. Realization of ground stations with such a start / charge system are facing major design challenges and are not yet known. The present invention is based on the object, an improved

To create a flight wind turbine, avoids the disadvantages of the prior art mentioned and further developed the latter in an advantageous manner. In particular, the inertia of the rotating parts, as well as the manufacturing costs and the dimensions of such a system with constant performance should be reduced. Furthermore, an optimal control of the aircraft and an independent efficient mechanical energy generation according to the YoYo principle should be ensured.

According to the invention this object is achieved by a power split and summation according to the features of the claims and the following description of the invention. Summary of the invention:

It is therefore proposed that the task of jointly unloading and retrieving all the ropes of the aircraft of the wind turbine drive technology of the task of

Separate adjustment of individual ropes to the one or the other. For this purpose, mechanical power is branched off from the drive train of a main cable and fed to the drive train of an actuating cable, and optionally to the drive trains of further control cables. Each of these power branches is superimposed on the mechanical power of the respective actuator by means of a summation gear.

The subject matter of the invention is thus a flying wind power installation comprising a ground station (1) and a controllable aircraft (2), tied up by cables or rope-like means (3, 4), driven by wind power, wherein the ground station has at least one main cable and one with a drive motor (16) with or without transmission gear (15) equipped main drive train (5) for generating energy by using the YoYo effect by removing and retracting the aircraft and at least one control cable and one with a

Drive motor (26) with or without transmission gear equipped actuator line (7) for actuating actuators of the aircraft, and devices for converting the mechanical energy into another form of energy and back, wherein at least one main drive train (5) and actuator train (7) over at least a summation gear (22), preferably a planetary gear acting as a summation gear, are connected to each other so that a part of the mechanical power obtained or applied with the aid of the respective main drive train (5) is branched off from it and superimposed with the mechanical power of the respective actuator train and so on the at least one control cable (4) is transferred via the planetary / summing gear (22), whereby the adjustment of the traction means (3, 4) in the main drive train (5) and in the Actuator line (7) can be separated from each other. Preferably, the summation gear (22) is arranged directly in front of the or the respective actuator train. However, it may also be arranged optionally in the region of the main drive train. Furthermore, additional devices for speed ratio can be provided. The invention also relates to a corresponding flight wind turbine, in which at least one main drive train (5) is installed in a cable drum (13). The associated main rope is wound on this winch drum one or more layers.

The invention also relates to a corresponding flight wind turbine, in which at least one actuator line (7) is installed in a cable drum (19). The associated control cable (4) is wound on this winch drum one or more layers.

The subject matter of the invention is also a corresponding flying wind power plant, in which the motor (16, 26) of at least one main or actuator train (5, 7) includes a rear mechanical connection possibility by means of which it is attached to the stationary structure outside the respective drum unit. For this purpose, a structural part or the engine itself lead through a drum pivot bearing.

The subject matter of the invention is also a corresponding flying wind power plant, in which at least one main or actuator train (5, 7) is inserted into a one- or multi-part motor tube (17, 27), which is marked at the front end by an end-face mechanical connection possibility of a drive motor or a motor-gearbox combination, and further characterized by a cavity which leaves enough space to accommodate the engine or the engine / transmission combination, and at the rear end is characterized by a part which passes through a drum pivot bearing and connected to the fixed structure outside the drum.

The subject of the invention is also a corresponding flying wind power plant with at least one integrated into the drum main or actuator train, in which the output serves in the radial direction as a support of the respective drive train or possibly the combination of the drive train and motor tube.

Preferably, the flying wind turbine according to the invention at least or exactly two control ropes or Stellseileinheiten, or Stellseiltrommeln (19) for controlling the

Aircraft on. In these cases, the two or more adjusting winches (7) in question are preferably installed coaxially in the system. The invention further relates to a corresponding flight wind turbine, wherein the at least one winch device or drum unit (19), which a

Actuator line (7), parallel and off-axis to at least one

Winding device or drum unit (13) having a main drive train (5) is arranged, and the respective winch or drum units via drive wheels (10A, 10B) and conventional traction means (11, 12) are interconnected (Fig. 4). Preferably, in this case, the connected winch device or drum unit (19), which a

Actuator line (7), connected to the side with the connected winch device or drum unit (13) which has the main drive train (5), on which the at least one planetary gear (22) is arranged.

The subject matter of the invention is also a corresponding flying wind power installation, in which the winch device or drum unit (19), which has an actuator drive train, is arranged coaxially with at least one winch device or drum unit, which has a main drive train. The invention also relates to corresponding flight wind turbines, which include a generator function in the form of a generator device. In the simplest case, this can be a drive motor that works as a generator.

The invention further relates to a corresponding flight wind turbine, in which (i) the summation gear (22) is arranged immediately in front of the actuator drive train (7); (ii) the plant has two or more actuator strands (7A, 7B) for differential control of the

Aircraft has; (iii) the two or more actuator strands (7A, 7B) are arranged one behind the other in the axial direction in a single or multi-piece winch device or drum unit (19); (iii) Main driveline and actuator train in said

Drum units or winch devices (13, 19) are interconnected via an off-axis gearbox (15), and (iv) winch device or drum unit (19) having the actuator strands (7A, 7B) coaxial with the winch device or drum unit (13). is arranged, which has the main drive train (5).

The invention further relates to corresponding flying wind turbines, in which the ground station (1), which accommodate said devices for generating mechanical and / or electrical energy, on a rotatable and / or movable, preferably round platform (9) is fixed, wherein in a particular embodiment the platform has a rotatable and / or movable mast (29), which guides the main drive cables and / or the control cables in the direction of the aircraft (Fig. 1, Fig. 7). The aircraft according to the invention preferably has one or more movable and adjustable by means of the control cables actuators. The aircraft may be a kite, as or a construction of moving textiles and / or films with or without

Frame construction. Corresponding aircraft are known in the art.

Also suitable in principle are more or less rigid flight / slidable constructions, as they are also often used.

The invention is also the use of a flying wind turbine according to the claims and the description for the production of electrical energy from

Wind energy. Finally, the subject matter of the invention is a method for extracting and withdrawing an energy source by means of wind power, which is tied to a ground station via ropes. The taking in and taking off of one or more setting ropes for controlling and aligning the aircraft takes place independently of the one or multiple engagement and withdrawal of the aircraft by one or more Hauptzugseile, which provide for the mechanical energy according to the YoYo effect, wherein the directly generated by means of at least one main drive train or applied mechanical power from this or this using at least one as

Diverging gear planetary gear branched off and this power unit with the mechanical performance of at least one actuator train with the help of

Superimposed and the summation and superimposed on the respective actuating cable, wherein the further or the summation between at least one main drive train (5) and at least one actuator line (7) are arranged, and the main drive trains and the at least one actuator line as part of a winch or drum winch in the ground station (1) are mounted. Description of the invention:

The following references are used at the top and bottom of the claims and figures:

01 ground station

02 aircraft

03 main rope

04 Stellseil

05 main drive train

06 supporting structure

07A actuator train 1

07B actuator train 2

08 spouts ropes 09 platform

10A traction drive main driveline

10B Traction drive impeller

11 traction means

12 tension roller traction drive

13 main rope drum

14 Drum Bearings - Main Drive Train

15 Transmission - main drive train

16 Drive motor - main drive train

17 Motor Pipe - Main Drive Train

18 fluid cooling connections - main drive train

19 Stellseiltrommel

20 supporting structure - actuator train

21 Drum Bearings - Actuator Harness

22 Totaling gear - actuator train

23 Transmission output planet carrier

24 Transmission output ring gear

25 gear drive sun

26 Drive motor - actuator train

27 Motor tube - actuator train

28 Liquid cooling connections - actuator line

29 Transmission - actuator train

30 Rotating arm / rotating mast

31 supports for rotary arm / rotating mast

32 pivot bearings for platform (9)

33 guiding the ropes to the aircraft (2)

The figures further illustrate the invention. In detail they represent the following:

Fig. 1 shows schematically a Flugwindkraftanlage with a ground station (1) and a bound aircraft (2) with 2 ropes (3, 4). Fig. 2 shows schematically in perspective the rotating part of a ground station (1) according to an advantageous embodiment with a rotatable table (9), 3 winches and non-pivoting Seilausläufen (8). The arrangement shows two coaxially arranged Stellseilwindentrommeln (19) in the foreground, which in the interior according to the invention, two actuator strands (7), each in turn a drive motor (26) include, and optionally or at least one summation (22). The said cable drum unit (19) is fastened to a support structure (6) mounted with the platform (9), as well as the main cable drum (13) arranged parallel behind it, which internally houses the main drive train (5) which drives the main drive motor (16). includes, and optionally another transmission (15). On the winch drums, the respective ropes (3, 4) are guided, which are connected by corresponding outlet guides (8) with the aircraft (2). Fig. 2 shows a preferred embodiment with a main cable and two control cables and thus a system which has a main drive train (5) and two actuator strands (7). Fig. 3 shows schematically the rotating part (9) of the ground station (1) of Figure 1 in plan view.

Fig. 4 shows the section shown in Fig. 2. Here, the Zugmitteltriebräder (10A, 10B) can be seen, which via a traction means (11), usually a chain or a

Gear belt, and possibly a chain tension (12) are interconnected. The left drum / winch (13) represents the derailleur strand, the right drum / winch (19) the actuator strands (7A) and (7B).

Fig. 5 shows the marked in Fig. 3 section through the main winch (13). According to this embodiment, the drum is divided into several compartments. Center of the

Supporting structure (6) stored (14) is the drive motor (16) via a transmission (15)

Connection to the drive wheel (10A) which is connected via said traction means (11) with the corresponding drive wheel (10B) of the second drum. Since the

Main drive (16) during operation of the main cable (3) can be hot due to the necessary high speed, are in the illustrated embodiment

Connections for a liquid cooling provided.

Fig. 6 shows the section marked in Fig. 3 through a part of the here two-part

Control cable winch (19) of the ground station of Fig. 2. In detail, shown here is the drive motor (26) for the control cables and the planetary gear (22, 23, 24, 25). Both parts are mounted (20, 21) and connected via the drive wheel (10B) with the main drive train (5).

Fig. 7 shows schematically a possible implementation of a take-off and landing system by means of co-rotating mast (29) (30) which is mounted on a rotatable platform (9) (31). The mast or arm has guides (32) for the main rope and the control ropes.

Fig. 8: Schematic diagram of cyclic energy conversion with towing kites. Fig. 9: Schematic diagram of the energy system

Fig.10: shows as a schematic diagram the winches of a ground station (1) for more advantageous

Version with 3 winches in plan view. The arrangement shows two coaxially arranged Stellseiltrommeln (19), which in the interior according to the invention two

Actuator strands (7), each in turn having a drive motor (26) and a summation gear (22) included. Said Stellseiltrommel unit (19) is rotatably mounted on a platform-mounted support structure (6), as well as the parallel behind it arranged main rope drum (13), which inside the main drive train (5), which comprises the main drive motor (16) and a transmission gear (15). Fig. 10 shows a preferred embodiment with a main cable and two control cables and thus a system which has a main drive train (5) and two actuator strands (7). Fig.11: shows a schematic diagram of the winches of a ground station (1) for more advantageous

Version with 3 winches in front view. The arrangement shows two coaxially arranged Stellseiltrommeln (19), which in the interior according to the invention, two actuator strands (7), each in turn having a drive motor (26), and a summing gear (22) included. The said cable drum unit (19) is rotatably mounted on a support structure mounted to the platform (6), as well as the coaxially arranged between the Stellseiltrommeln main cable drum (13), which in the interior

Main drive train (5) comprising the main drive motor (16) and a transmission gear (15). Fig. 11 shows a preferred embodiment with a main cable and two control cables and thus a system which has a main drive train (5) and two

Actuator strands (7).

All descriptions call ropes as traction means, but it should be emphasized that the invention is expressly not limited to this type of traction means. Also conceivable in these places are chains, straps, straps and other non-mentioned traction means, as well as compounds or hybrid forms thereof, from a variety of materials suitable for this purpose.

The present invention relates to systems operating in so-called YoYo operation.

This consists essentially of 2 phases. Phase 1 is characterized in that the aircraft pulls ropes under power from the ground station, which converts this mechanical energy into usable form. Phase 2 is characterized in that the aircraft is operated so that the rope forces are lower than in Phase 1 and the aircraft is recovered at a higher speed than in Phase 1 with less energy use. In this yo-yo cycle, a positive total energy balance is created at the

Soil station, usable energy can thus, if appropriate after a homogenization by a buffer memory, are delivered. The aircraft of a flying wind turbine must by actuators, for example

Devices, the flap rash, wing twist, center of gravity or

Change angle of the aircraft, be controllable, and can also other adjusting devices, such as Reffvorrichtungen, brake or emergency umbrellas, inter alia Mechanisms include. The drives which operate the control devices of the aircraft may be located either in the aircraft or on the ground. The advantages of a control from the ground are on the one hand in the weight savings in the aircraft and on the other hand in the cost savings due to the fact that non-accompanying drives are cheaper to implement and maintain. In particular, the invention relates to the ground stations of such systems in which at least one actuator on the wing is actuated from the ground by means of an actuating cable.

The actuating movements are transmitted in the case of a drive from the ground via control cables to the aircraft. The invention relates to flying wind turbines, which consist of at least one main cable drive (5) and at least one Stellseiltrieb (7). Here, the drivetrain of a main rope is characterized by the ability to provide over the full required speed range of YoYo cycle 'the required power to jointly omit and retrieve all ropes and the drive train of an actuating rope characterized by the ability, the power, dynamics and

Position accuracy, which is required when adjusting the respective cable relative to a main cable, over the required speed range of the corresponding

To provide adjusting movement.

Furthermore, the invention primarily, but not exclusively relates to flying wind turbines, in which the conversion of the translatory kinetic energy of the rope is effected in another form of energy by at least one winch, which consists of at least one cable drum, which the translational energy of the rope in rotatory Energy converts, and a drive member with or without gear, the energy transformations of mechanical, rotational energy in another form of energy, for example. Electric energy, allows in both directions. The present invention expressly relates to all flying wind turbines with at least one main rope and one adjusting cable each, but is illustrated by means of an embodiment of three-rail vehicle systems. Dreileinerdrachen have a main rope, and two control cables. By adjusting a control cable relative to the other, the kite is deformed asymmetrically, which causes a path change by the asymmetry of the flow. By adjusting both control cables by the same path relative to the main rope, the angle of attack of the entire aircraft can be changed.

In a preferred embodiment, the speed ratio in the power branch between the main cable drum and the adjusting cable drum is in each case selected so that, when the actuator is stationary, the cable coupled in this way moves as quickly as possible as the main cable. However, any deviations can be compensated by the relevant actuator.

An advantageous development consists in the attachment of all cable drives and the respective associated possible Seilumlenkmittel on a freely or driven rotatable platform (9). This can accordingly follow automatically by the train of ropes or motor driven the aircraft so that the intended cable outlet direction (8) always has sufficiently accurate in the direction of the aircraft. Therefore, when using such a rotatable platform (9, 31) can be dispensed with pivotable Seilumlenkmittel on the cable outlet. Furthermore there are problems due to collision of flat leaking ropes with

Parts of the system, such as the outlets of other ropes, are prevented even if the ropes leading to the aircraft do not leave the system at its highest point. A driven rotatable platform can also be used very economically as a pivot bearing and drive (31) for a possible rotation arm (29) as a take-off / landing.

An embodiment of the invention may be to operate and control an aircraft from the ground by means of a main winch and at least one winch, each comprising a cable drum and a motor / generator operating engine. At each of the Stellseiltrommeln as a summation (22) acting planetary gear is installed such that the ring gear (24) fixed to the rotatable

Stellseiltrommel (19) is connected, the sun gear (25) fixed to the actuator (22) is connected, and the planet carrier (23) with the main cable drum (13) is connected such that mechanical power can be transmitted. Between ring gear (24) and planet carrier (23) there is always a speed ratio in the amount of i = 1-1 / i _0> where i _{0 represents} the state ratio of the planetary gear. In order to prevent a speed difference between the main and Stellseil with stationary actuator, between the planet carrier of the summation and the main drive train a

Speed ratio be provided near the reciprocal 1 / i. Alternatively or additionally, the respective Stellseiltrommel with a different diameter than the

Main rope drum are running.

In a further embodiment, the main drive train and the actuator drive train are connected according to the above description with an off-axis gearbox (5), such as a spur or traction gearbox. Thus, any winch can be arranged off-axis to the main winch. Advantageously, the latter are arranged coaxially to each other when using a main rope and several Stellseilwinden and in such a way that their outer ends axially not or not substantially over the ends of Protruding main rope drum. In this way it is possible to have a square

Footprint, resulting in best surface utilization on a rotating platform. By this arrangement, the total required installation space of the system is reduced and the masses of the components are better concentrated around a possible axis of rotation of the entire system, resulting in a lower moment of inertia when mounting the

Winches on a rotating platform leads.

In another embodiment of the invention, one or more hoist winches can be arranged coaxially to the main winch. This can be dispensed with an off-axis gearbox in the power branch between the main and control drum. To the

Speed difference between main and Stellseiltrommel with stationary

To compensate actuator, it is possible to use a coaxial transmission and / or execute the Stellseiltrommel with a different diameter than the main cable drum.

In order to reduce the dimensions of the winches including their drive trains, it is advantageous to the respective transmission and / or the prime mover in their associated

Wind drum to integrate.

The integration of the drive trains in the respective cable drums can be carried out such that the motors receive a rear-side mechanical connection possibility, by means of which they pass through a drum bearing to the stationary structure outside the rotating

Drum can be attached. However, in smaller quantities are cheaper

Drive motors from mass production available, which usually have no back

have mechanical connection option. These are according to the invention in a single or multi-part motor tube (17, 27) inserted, which is characterized at the front end by an end-side mechanical connection possibility of a drive motor (16, 26) or a motor / gear combination, further characterized by a cavity round or polygonal, constant or non-constant cross-section which leaves enough space to accommodate the engine or engine / gearbox combination and is characterized at the rear end by a part passing through the drum bearing and connected to the fixed structure outside the drum , The driveline torque must be dissipated into the outer structure through the rear end of the engine tube. Alternatively, in the presence of a transmission in the

Driveline the front end of the engine tube also near the junction between the engine and transmission or other appropriate locations of the engine / transmission combination are attached, so that only the underlying part of the engine / transmission combination is located in the motor tube.

In an advantageous embodiment of the drum bearing (14, 21) leading part of this motor tube can be made tapered, which allows a smaller size of the drum bearing. In order to reduce the bending moments in this part of the motor tube, according to the invention serve as a further support of the drive train whose rotating output. This is naturally substantially non-rotatably and radially immovably connected to the cable drum, which in turn is mounted to the fixed structure substantially rotatable and radially immovable. This results in no further action in the

Essentially rotatable, radially non-displaceable mounting of the drive train to the solid structure near the end of the shaft. If the drive train is driven on the output side in such a way that the occurring radial forces are endured over the desired service life, and the deflection of the drive train and motor tube combination is sufficiently counteracted by sufficiently powerful shaping of the motor tube and possibly the parts of the drive train not located therein In turn, this reduces the bending moments on the rear of the motor tube. The static overdetermination occurring here can be achieved with sufficiently soft or sufficiently precisely manufactured structural parts

be accepted. Alternatively, the bending moments at the back of the

Motor tube can be prevented by a hinged or flexurally elastic storage. Because the rope drums because of the high speed when putting on and taking off the

Drive cables and control cables as well as the cables can become very hot even during operation, cooling devices can be provided according to the invention in a further embodiment. Thus, in order to ensure better cooling, integrated in the cable drums drive members via corresponding connections (18) with a

Liquid cooling to be equipped.

The energy conversion of the towing kite system according to the invention is shown schematically and in principle in FIG. The processes that occur during the operation of the plant can be described in more detail as follows:

Level 1: Power stroke with power generation, missile flies across the wind and builds up high rope forces. The rope is speed-controlled and torque-limited extended.

Energy conversion via cable drums and generator. Several rope drums for main and Stellseil are thereby extended at the same speed. Example version with synchronous generator, controller and inverter to the grid. Variable speed operation. Level 2: Retrieve cycle with power requirement, missile flies with minimized forces (straight or on the windward side) Engine drives drums and all ropes are retracted at the same but higher speed than in level 1. The required energy comes from the grid via regenerative inverters. Level 3: Control plane missile can be adjusted by one or two control cables. For this purpose, separate control drums are mutually adjusted or jointly relative to the tether drum. The required energy is minimal and is also drawn from the DC link.

Level 4: A braking resistor and optionally a buffer draw excess energy from the DC link and store energy or convert it into heat. While the braking resistor is an essential safety feature, the battery buffer is an optional component.

Claims

claims:

1. flying wind turbine comprising a ground station (1) and a by ropes or

cable-like means to this tethered wind-powered controllable aircraft (2), said ground station having at least one main cable and one equipped with a drive motor (16) with or without a transmission gear

Main drive train (5) for obtaining mechanical energy by using the yo-yo effect by means of extracting and retracting the aircraft and at least one control cable and a drive train (7) equipped with a drive motor (26) with or without transmission gear for actuating actuators of the

Aircraft and devices for converting the mechanical energy into another form of energy and back,

characterized in that at least one main drive train (5) and actuator train (7) via at least one summation (22) are interconnected, so that a part of the obtained or applied with the help of the main drive train mechanical power diverted from this and with the mechanical power of superimposed on each actuator strand and is passed to the at least one control cable (4) via the summing, whereby the adjustment of the traction means (3, 4) in the main drive train and in the actuator drive train can be done separately.

2. flying wind turbine according to claim, characterized in that the

Summing gear (22) is a planetary gear.

3. flying wind turbine according to claim 2, characterized in that between the planet carrier of the summation (22) and the coupled

Main drive train means are provided for speed translation.

4. flying wind turbine according to one of claims 1 - 3, characterized in that a main drive train (5) within a winch device or drum unit (13) is arranged to receive a main cable (3) and up and unwind is capable of.

5. flying wind turbine according to one of claims 1 - 4, characterized in that an actuator line (7) within a winch device or drum unit (19) is arranged to receive at least one control cable (4) and up and unwind is capable of.

6. flying wind turbine according to claim 4 or 5, characterized in that the motor (16, 26) at least one main or actuator line (5, 7) on the rear side, so the output shaft side facing away, mechanical

Connection possibility includes, by means of which it is attached to the stationary structure outside the respective drum unit.

7. Flugwindkraftanlage according to claim 4 or 5, characterized in that

at least one main or actuator line (5, 7) is inserted in a single or multi-part motor tube (17, 27), which is characterized at the front end by a front-side mechanical connection option of a drive motor or a motor-gearbox combination, and further characterized by a cavity which leaves enough space to accommodate the engine or engine / gearbox combination and is characterized at the rear end by a part passing through a drum pivot bearing and connected to the fixed structure outside the drum.

8. flying wind turbine according to one of claims 6 or 7, characterized in that the output of at least one main or actuator line (5, 7) in the radial direction serves as a support of the respective drive train or possibly the combination of the drive train and motor tube.

9. Flugwindkraftanlage according to any one of claims 1-8, characterized in that two or more Stellseiltrommeln (19) are arranged coaxially with each other.

10. Flugwindkraftanlage according to any one of claims 1-8, characterized in that the one or more winch devices or drum units (19) having a

Actuator (7), is arranged parallel to the one or more wind devices or drum units (13) having a main drive train (5).

11. flying wind turbine according to claim 10, characterized in that the said winch devices or drum units (13, 19) at least on the

connected side without axis offset, so are arranged coaxially.

12. flying wind power plant according to claim 10, characterized in that said drum units or winch devices (13, 19) are arranged on the connected side off-axis, wherein the respective winch or

Drum units via drive wheels (10A, 10b) and traction means (1 1, 12) are interconnected.

13. flying wind turbine according to one of claims 1-12, characterized in that at least one of the drive trains (13) (19) comprises a generator or has a generator function.

14. flying wind power plant according to one of claims 1-13, characterized in that the ground station (1) on a rotatable or movable platform (9, 31) is attached.

15. flying wind power plant according to claim 14, characterized in that the platform (9) has a rotatable and / or movable mast (30) having guides (33) for the main drive cables and control cables.

16. flying wind turbine according to one of claims 1-15, characterized in that the aircraft (2) is a kite construction.

17. Use of a flying wind turbine according to one of claims 1 - 16 for

Extraction of electrical energy from wind energy.

18. Method for energy-efficient fast removal and retraction of a

Energy generation by means of wind power provided to a ground station (1) via ropes (3, 4) bound aircraft (2), wherein the insertion and removal of one or more control cables for controlling and aligning the aircraft is independent of the single or multiple input and taking off the

Aircraft by a Hauptzugseil, which provides for the mechanical energy production according to the yo-yo effect, characterized in that with the help of at least one main drive train (5) directly generated or applied mechanical power diverted from this with the help of at least one as a summation gear (22) acting planetary gear and this power unit with the mechanical power of the respective actuator train (7) by means of

Superimposed and transferred to the respective control cable (4), wherein the summation between at least one main drive train and at least one actuator line is arranged, and the at least one main drive train and the at least one actuator train as part of winches or drum winches (13, 19) in the Ground station (1) are mounted.