NO344743B1 - Placement of turbines in a martry rig - Google Patents

Description

Placement of turbines in a matrix rig and transport of energy, as well as a method for mounting turbines with associated propeller sets.

The present invention relates to the placement and assembly of the wind turbines in a matrix rig for the production of wind energy and the construction of the rig. The invention thus relates to a wind power plant comprising a frame on a floating pontoon where the frame is constructed as a grid-shaped rig standing upright on the pontoon which forms a plurality of rectangular or square openings in the rig for receiving respective replaceable wind turbine generators with associated drive propellers driven by incoming wind, and where each wind turbine generator is designed to be led up along the rear of the rig and into the openings towards the rig's front side, as appears from claim 1's introduction.

A method is also defined for the installation of turbines with associated propeller sets in a wind power rig, as can be seen from the introduction in claim 15.

The invention also relates to a system for electrical energy transport from the matrix rig down to the underlying deck and a further system for electrical energy transport from several units to land and connection to existing grids. The patent application concerns new technology which is a further development of Norwegian Patent, patent number 341700.

More specifically, the invention aims to be able to use turbine structures with propeller blades that define a larger rotation plane than the square opening in/through the rig makes possible.

Background for the invention.

Offshore wind technology is undergoing rapid development. Most of the development has been about producing ever larger and larger turbines mounted to a mast that has stood on the seabed or floats in cylindrical floats such as the Hywind system.

Many professionals in the industry are nevertheless skeptical of this development and believe that so-called multi-rotor systems can be a better solution, as shown in the text and figures in the aforementioned Norwegian patent NO 341,700.

Wind Catching Systems, as described in the NO patent, is a so-called multi-rotor system where many turbines with associated propellers are placed in a matrix form in a rig (also called a sail). Each turbine in the rig is placed in approximately square or rectangular openings (light openings) in the rig and a funnel narrows the wind flow so that all wind must pass through the circular hole where the turbine with its turbine blades sits. In practice, this means that the funnel's largest opening is at least 30% larger than the opening where the turbine is mounted. The rig is designed to float on the sea mounted on top of one or more pontoons and, according to a favorable alternative, on three parallel pontoons that form a so-called trimaran according to NO341700. The rig is anchored using suitable anchor lines (chains) (not shown) to the seabed or land anchorage.

This is a system that will undoubtedly work, but there are nevertheless some challenges with the system that are not particularly desirable. It can be very demanding to design the rig and the inlet funnels correctly and regardless of the design, the system will cause unwanted high draft, i.e. wind load on the rig's structures, which will in turn propagate to the system's anchor systems. Unwanted high draft will also naturally result in less energy production from the turbines.

Purpose of the invention

A first purpose of the invention is to be able to increase the proportion of an incoming wind field towards the front surface of the rig that can be converted into electricity production via the turbine propellers (blades).

It is also an aim to be able to increase the turbine propellers' rotation plane at the same time that the opening area in the rig as the turbines with associated propellers remains the same. It is therefore a purpose of the invention to increase the blade length of the propeller.

Furthermore, it is an aim to produce a solution where each propeller blade is longer than what, according to the first solution, would normally be able to be introduced into and through the opening area in the rig.

New technology - present invention.

The present invention relates to a new technology related to and further developed in relation to the aforementioned patent NO341770, as can be seen from the characteristics in the subsequent patent claim 1. The device in the invention is characterized by the fact that each turbine generator comprises one or more pairs of propeller blades which form a propeller set with a blade diameter which defines the turbine's plane of rotation, each set of propellers being arranged at a distance from the front side of the rig, to be rotated by incoming wind towards the rig.

The preferred solutions of the construction can be read in the dependent patent claims 2-14.

With this invention, a much larger proportion of a wind field towards the front of the rig can be utilized for electricity production, since the turbines can be organized among themselves so that the blades' rotation plane, seen from the front, forms the tightest possible packing, analogous to a tightest ball packing.

By having the turbines placed in relation to each other so that the propeller blades will alternately rotate in different planes in front of the rig's front side, the propellers can collectively absorb the entire maximum energy from an incoming wind field. The rotation planes of the propellers can thus overlap.

According to a preferred solution, the blade length of the propeller can be made longer than the opening space in the rig allows by the blades being hinged, whereby each blade can be swung forward during insertion through the opening space. When the turbine and blades have come sufficiently through the opening and out the front, the blades are swung back and can start rotation.

The method according to the invention is characterized by the fact that turbines with two or four pairs of propeller blades are used and the pairs of propeller blades are set so that they lie along the diagonal or hypotenuse of the aforementioned openings, and in which position the turbines with propellers are pushed forward through the opening, until the propellers have reached in position in a position at a distance in front of the front plane of the rig.

The preferred embodiments can be read from claims 16-23.

Figure set.

Figures 1 – 11 show as follows:

Figure 1 shows a rig 10 for the wind power plant according to the invention, and seen obliquely from the front.

Figure 2 shows a first preferred installation of a number of turbines with propellers in a matrix rig, where the propellers are arranged in a dense ball packing form, where the propeller tips are almost right next to each other, without touching each other.

Figure 3 shows a side view from the rig where a four-bladed propeller is in the process of being introduced forward to its working position with rotation in a plane in front of the front side of the rig.

Figure 4 shows the corresponding side view as Figure 1, where the turbine/propeller has now fully reached its working position. The figure shows the opening in the rig as the "crossing" propeller blades 14a, 14b align with the diagonal in the opening space so that the turbine unit can be pushed forward to the position of use.

Figure 5 shows a two-bladed propeller seen from the front, also to illustrate the term - a plane of rotation 30, as well as the diagonal setting of the propeller blades to advance it through the opening.

Figure 6 shows two mutually parallel and horizontal turbine rows A,B which form a tightest spherical packing.

Figure 7 shows a rig with turbine blades/propellers seen from the front, and illustrates a construction where the propellers' rotation plane 30 overlaps each other.

Figure 8 shows a section of a pan view of the rig with the propellers placed alternately in front of/behind each other in relation to the front of the rig.

Figure 9 shows a side view section of a corresponding displacement of adjacent propellers as in Figure 8.

Figure 10 shows how propellers can be hinged, with the blades tilted forward to be guided through the opening in the rig.

Figure 11 shows the corresponding propeller, which has now been brought out on the front of the rig and the blades have been tilted back to their operational turning position.

The figures will now be explained in more detail.

Figure 1 shows a wind turbine rig 10 according to the invention which floats on the sea 13 by means of pontoons 1,2,3. The three parallel pontoons thus form a so-called trimaran, analogous to the floating solution according to NO341700 and are anchored by means of suitable anchor lines (chains) (not shown) to the seabed or land anchorage. The bottom chain is preferably fixed in a rotatable turret on the underside of the central pontoon 2, so that the entire construction can turn upwind. The rig is upright on the pontoons, and is set with its front surface 11 facing the wind direction 40 for operation of the turbines. Each wind turbine 12 with its associated propeller 14 is mounted inside each respective light opening 20 in the rig 10. The propeller 14 is mounted to a shaft 15 which turns and thus generates electricity inside the turbine housing 12 generator.

The rig 10 is made up of vertical towers 16 (struts) and horizontal braces 18, both of which are aerodynamically designed so as to create the least possible drag / resistance in relation to the wind passing through the rig across the front surface 11. In practice, each " tower" built up of two round parallel pipes 16 which are interconnected with a truss system of struts 27 (see fig.3) for bracing. Two adjacent towers 16 are connected by horizontal struts 18 of tubular shapes to avoid lateral forces on the rig when the wind enters from the side from the front. These forces can become very large and completely unmanageable, if the towers are not designed in this way as outlined here. The openings (light openings) 20 between the towers 16 and the braces 18 and cross braces 27 are preferably rectangular, and particularly square. According to the invention, either two (see figure 5) or four propeller blades/rotor wings 14 are used as shown in figures 1, 2, 3 and 4.

The wind generators 12 including propellers 14 are mounted to a frame under each generator 12 and this frame can be attached to respective horizontal braces 18 between each tube 16 or the vertical towers.

The turbines 12 with propellers 14 are set in the associated openings 20 in the matrix between vertical tubes 16 and transverse struts 18. Each turbine 12 with propellers 14 is fixed in a frame 70 which forms a base, which comprises laterally directed struts 72 whose oppositely directed ends extend into mutual vertical grooves 72 in two adjacent vertical pipes 16 as shown in Figures 3 and 4. When the turbine 12 in the frame is lifted (from the rear) to the correct height in the rig 12, it is pushed forward. The end pieces of the struts 72 can then be guided forward in the horizontal grooves 74 which are formed on the inside of each pipe 16 in the tower. When the frame is pushed forward, the propellers 14 will be located in front of the front surface of the rig. In order to achieve an overlap as mentioned, the turbines are pushed forward to respective different positions in front of the rig, and still attached to the towers 16 and the side struts 18. When the frame with the turbines is pushed into position, it is locked with suitable locking devices.

According to the invention and as illustrated in Figure 5 with a two-bladed propeller, the propeller blade length is adapted to the diagonal in the associated opening in the rig. When the propeller 14 is displaced through the opening and out in front of the front of the rig, it can be made to rotate by the wind as in figure 4. It can be seen from figures 2, 3 and 4 that the blades form a rotation plane 30 with a length (diameter) corresponding to the diagonal d or the hypotenuse of the square, which is therefore greater than the square's catheter k and thus constitutes a limitation inside the rigging opening.

Figure 2 shows a preferred stacking of turbines in the rig. The rig 10 is adapted so that the turbines/propellers 12/14 are arranged vertically, one above the other. In the next vertical turbine row on each side, the individual turbine sets are offset vertically by half a propeller diameter 1/2D = d (radius), so that the propeller blades can rotate (plane of rotation 30) into the star-shaped space 22 defined by three adjacent propeller shapes. This stacking of turbines is analogous to a tightest packing of spheres. During assembly, the propeller blades are set along the diagonal of the opening space as explained above. An equivalent solution is shown in figure 6, where the turbines are stacked in line horizontally with each individual turbine set shifted horizontally by half a propeller diameter in relation to an underlying or overlying layer of turbines in the rig.

Figure 3 shows an initial assembly of the turbine, i.e. lifted up and ready to be pushed forward to the position in Figure 4, which is the propeller's working position for power generation. The propeller blades are set flush with the diagonal in the opening space so that the turbine unit can be pushed forward into the space. Figure 4 shows that the "crossing" propeller blades align with the two diagonals in the square opening space so that the turbine unit can be pushed forward to the position of use.

Figure 5 shows a variant with a two-bladed propeller. The opening space 22 is defined by the pipe columns 16 and the cross members 18. The flush propeller blades 14a, 14b are set along the diagonal d in the square and can be pushed forward to the position of use,

As shown in figure 8 - a plan view, and figure 9 - a side view, turbines 12 are mounted offset and positioned alternately in front of and behind each other in relation to the front side 11 of the rig 10.

They are therefore to be placed just in front of the front surface of the rig in different distances from each other, i.e. alternately at a distance 50 or a distance 52 from the front surface 11. Thereby the turbines overlap each other, and almost the entire wind field 40 towards the rig 10 is utilized for power generation. Figure 7 shows how large an area a propeller with a diameter = 32 meters will cover in a matrix rig with openings = 20 x 20 meters

Figure 10 shows an embodiment as a solution for the situation where the propeller diameter is larger/longer than the diagonal in the opening space, and it cannot be pushed through the opening in the matrix as in the previous examples. In this case, the solution is that each individual propeller blade is hinged inside the propeller housing, shown at number 17. In such a way that each propeller blade can be tilted forward while being passed through the die opening. When it has been brought to the front side 11, the propeller blades are folded out again and locked in this position, as shown in figure 11, whereby it can rotate and produce power as intended. The propellers can then overlap and cover the entire wind field (wind trap) 40 that comes in towards the rig. This solution is relevant when the propeller blades are longer than the aforementioned opening diagonal.

This mechanism can be used when the turbine/propeller is folded forward to be pushed through the opening 20, or retracted at the back, for example for maintenance of the turbine/propeller etc.. When a turbine with the associated propeller is to be removed from the rig, the blades are folded together along the axis and the whole unit can be pulled back and out of the opening.

If we imagine a rig - a matrix rig - where the distance between the vertical towers 16 is 20 meters and the distance between the vertical tube braces 18 is 20 meters, the diagonal (hypotenuse) from corner to corner in the matrix opening will be about 28 meters. This means that a turbine's propeller set can have a maximum diameter (approx. 2 x radius = 28 meters) if the turbine with its rigidly mounted propeller blades is to be pushed through the light opening from behind in the rig, so that the propellers come out on the rig's 10 front side 11 to rotate and act in front of this front 11. This is one of the details according to the invention which is discussed in the application.

Mention of a preferred embodiment 1

Rotor blades are used which have a length from the center of the generator of, for example, 13 metres, that is to say the diameter of the propeller is 26 meters from the propeller tip to the oppositely directed propeller tip. When the generator with propeller is to be hoisted into place, the propeller, which in this case has four blades (it can also have two blades), is set in a position so that the propeller tips point towards the corners of the matrix opening in the rig. When a generator with propeller tips set in position as described above is hoisted into place by the elevator located behind the matrix rig - the rig - (as in patent no.341700), the generator with the propellers is pushed into the matrix opening and it is pushed as far in that the propeller set goes through the entire matrix opening and is left standing out at a distance from the front face of the rig 11. This means that the propeller can now rotate freely at a distance from the front surface of the rig/rig, without it touching the vertical towers 16 or the horizontal braces 18 Two mutually adjacent sets of propellers are thus positioned at mutually - i.e. alternately - different distances from the towers 16 on the front side 11 both in the vertical plane and the horizontal plane so as not to collide with each other.

It is obvious that the propellers cannot rotate when the turbine is inside this opening, nor is it intended. The purpose of the invention is to use propellers that provide the greatest possible rotation plane in use, in that they must act in front of the front of the rig front. In a rig with matrix openings of 20 x 20 metres, it is then possible to use propeller blades which each have a length of, for example, 16 metres, i.e. a diameter of the propeller of 32 meters from one propeller tip to the oppositely directed propeller tip. If we imagine a rig / a matrix rig with 100 matrix openings, then this rig will typically have a gross windbreak of 221 x 233 metres, that is 51493 m<2>. Each turbine will have a wind catch of 16 x 16 x 3.14 = 803 m2. 100 turbines will then have a windbreak of 80000 m<2>, but the turbine blades will overlap each other so the net windbreak will be 51493 m2 2800 m2 (this is the area where the propellers go outside the towers on the sides and on the top and bottom of the rig. Total windbreak in this example will then be 54293 m2.

If the propeller blades are made shorter so that they do not overlap during rotation, there will be a relatively large wind field between the propellers that will not be used for energy production. This unproductive wind field will in many cases make up more than 25% of the total productive wind field that is available for electrical energy production. With the solutions according to the invention, this unproductive field of action is eliminated in its entirety by the solution with overlapping circular propeller planes 30 in figure 4 and propellers/turbines 12/14 placed "next to" each other analogously to and similar balls in a tightest ball packing.

According to the invention, this problem is solved in the following way so that the productive wind field can be increased:

Option 2: shown in Figure 2.

The vertical matrix openings can be shifted 50% in height in relation to each other. Here, the propellers are placed significantly closer than according to the aforementioned NO patent, and the unproductive wind field has become significantly smaller. Figures 2 and 6 show that the outer parts of each propeller blade will move - rotate - into a triangular space 22 (figure 2) between two adjacent rotating propeller blades and without touching each other. Each propeller set with its blades is positioned with its plane of rotation analogous to a tightest packing of balls.

Option 3 shown in Figure 6.

In this option 3, all the matrix openings are placed next to each other horizontally without any mutual height displacement. The propeller sets 14 in the rig are positioned so that the blades are just not in contact with each other, while Figures 2 and 6 show that the associated rotation circles 30 do not tangent or touch each other.

Instead, the generators with attached propellers are mounted in every other row next to one of the vertical towers. We will then get a very tight packing of the turbines and the unproductive wind field will be reduced in the same way as in alternative 2. The advantage of alternative 3 compared to alternative 2 is that with proper planning you can get almost half the propeller on each side of the rig's (rig's) front plane or surface to sweep beyond the rig's vertical side tower. This will provide a significant additional wind catch outside the outer edges of the rig and lead to a significant increase in energy production without the cost of the power plant increasing to any particular extent. In many ways a free additional windbreak for energy production.

Although the solution according to alternative 1 may be the simplest in terms of construction and thus economically, the other two solutions in alt.2 and alt.3 will also work as intended.

Internal energy transport in the matrix rig

It can be challenging and primarily very expensive to establish a conventional system for the transport of electrical energy from the turbines in the matrix rig down to the deck of the power plant for further transport to land.

The challenge can of course be solved with traditional copper cables from each individual turbine. But because the turbines produce a lot of electricity with relatively low voltage, large voltage losses will easily occur in the cables and it will be very expensive to dimension conventional cables so that voltage losses and the subsequent energy losses do not occur.

In the matrix rig according to the invention, the transport of electrical energy from the turbines in the rig down to the deck of the power plant and on to conversion equipment and/or transformers is therefore solved in the following way:

Insulating pipes are first installed, preferably inside the towers. The insulating tubes run from each turbine or perhaps from each matrix opening down to the deck and on to the converter equipment or transformers. Aluminum rails, preferably shaped like circular cylinders, are then mounted inside the pipes. These aluminum profiles now become current conductors and because it is easy and reasonable to dimension these up, they will easily be able to get a dimension that completely prevents voltage drop and energy loss from the turbines down to the conversion equipment.

Of course, you will also be able to use only current-carrying rails, preferably in aluminium, preferably with a cylindrical profile, where the rails are only isolated, for example, at points inside the towers and further down to the conversion equipment/transformers.

When power rails are to be used with such lengths as will be applicable in relation to this patent application, splicing the rails could be challenging if voltage and power losses in the joints are to be avoided. You can of course use ordinary clamps, but this is not a perfect solution.

The preferred solution according to the invention involves the use of cylindrical profiles, preferably in aluminum (but other metals can also be used). The ice profiles can, for example, have a length of 20 metres. Each rod has external threads at one end and internal threads at the other end. We could then saw the profiles together and get a very good electrical connection between the profiles. You can also imagine that you have profiles with only internal threads and profiles with only external threads and that these then become shot together. To further improve the electrical contact between the profiles, you can also have an extra nut in the joints that enclose two profiles.

Choice of turbine solution

In most wind power plants today, alternating current generators are used. This is a solid and well-tested solution that works very well in stomach cases. But we see that as it becomes more and more common to move the power-producing wind turbines further and further from land, it becomes necessary to convert the alternating current (AC) that is produced out in the sea to direct current (DC), in order to avoid large energy loss in connection with the transfer of the current to land. This is done on separate platforms and is a very expensive process.

When you have many turbines next to each other, as in a matrix rig, you will be able to use another technology that is very simple and very cost-saving.

All the turbines are connected in series. If you use high-voltage DC turbines, where, for example, each turbine has a voltage of 6,000 Volts and you connect 100 such turbines in series in a matrix rig, you will have a direct current with a voltage of 600,000 Volts which you will be able to send directly to land over long distances with minimal energy loss. As previously stated, we want to avoid the expensive process of transforming alternating current and then converting it to direct current before it is sent to shore.

But you will also achieve a very significant cost saving in connection with the electricity production in the matrix rig.

Logistics solution for exporting energy from several floating wind turbines gathered in a park and to land. Transport of electrical energy from conventional wind farms to land for connection to existing electricity grids is often an expensive and complicated technology, if the wind farm is located a certain distance from land and existing electricity grids.

You have to transform the voltage to high voltage with a voltage of at least 132 kilovolts. This solution is virtually impossible to achieve technologically with conventional wind turbines, whether they are fixed to the bottom or mounted on floats such as Hywind. The solution then is to build own platforms for transforming and possibly rectifying the current from AC to DC. This is a very expensive solution.

The floating wind power plant described in this patent application and the previous patent, patent no. 341700 makes it possible to find other and simpler and less expensive solutions for bringing electrical energy ashore.

On the deck of the power plant and in the hulls, there is plenty of space for transformers, conversion equipment and possibly rectifiers of the current from AC to DC, if you wish to bring the current ashore as DC current.

It is therefore possible to prepare the current from each individual at the power plant and bring it ashore in a separate cable via a swivel and a turret. In many cases, this will be an expensive solution, as high-voltage cables of this dimension buried on the seabed are a very expensive method. It would therefore be a cheaper and simpler solution to collect the power from several flying power plants in a cable and then bring it ashore and connect it to an existing electricity grid.

This is solved according to the invention in the following way. You first place a floating power plant in the center of a field. This power plant then becomes the central power plant. Around this power plant you place several power plants, in this patent application called satellites, for example 4. You will then have a total of 5 power plants in this field that produce electrical energy.

The electrical energy produced by the satellites is connected to the central power plant via the turret and swivel. Inside the central power plant, the energy from all the satellites and the energy produced by the central power plant are connected together. You can now possibly transform all the current from all the power plants to the desired voltage and you can also optionally run the current through a rectifier if you wish to bring the current ashore as direct current/DC. The power (electrical energy) from all the power plants is now driven out through the same swivel and turret as the power from the satellites entered the central power plant and before ashore and connected to a central grid in a high-voltage cable.

With this technology, you can therefore collect and process electrical energy from many floating wind turbines and bring the electrical energy ashore in a high-voltage cable without having to build your own expensive platforms for connection and transformation and possibly rectification to DC of the current. You will also be able to use similar technology if you connect direct current turbines in series as described above and collect the energy from several floating wind turbines in one power plant and send the dc current together to land.

Stiffening of the matrix rig.

It can be challenging to stiffen the matrix rig laterally. This could be solved by using two large truss girders on top of the rig/rigging, one truss girder for each row of towers.

Claims (1)

PATENT CLAIMS Requirements 1 Wind turbine comprising a frame (10) on a floating pontoon (1,2,3) where the frame is constructed as a grid-shaped rig (10) standing upright on the pontoon (1,2,3) forming a plurality of rectangular or square openings in the rig ( 10) for receiving respective exchangeable wind turbine generators (12) with associated drive propellers (14) which are driven by incoming wind (40), and where each wind turbine generator (12) is arranged to be guided up along the back of the rig (10) and into through the openings towards the front side of the rig (11), CHARACTERIZED BY AT each turbine generator (12,14) comprises one or more pairs of propeller blades (14a,b) which form a propeller set (14) with a blade diameter which defines the turbine's rotation plane (30), each propeller set (14) is arranged at a distance from the front side (11) of the rig (10), to be rotated by incoming wind (40) towards the rig (10). Requirement 2. Wind power plant in accordance with claim 1, CHARACTERIZED IN THAT the length of said propeller diameter (14a+14b) is approximately equal to the diagonal (d) of the rectangular or square openings (20). Requirement 3. Wind turbine in accordance with claim 1, CHARACTERIZED IN THAT the length of said propeller diameter (14a+14b) is longer than the diagonal (d) of the rectangular or square openings (20). Requirement 4. Wind power plant in accordance with claim 3, CHARACTERIZED IN THAT each propeller blade (14a, 14b) is hinged at (17) adjacent to the propeller housing (19), to be adjusted between a position where they are tilted forwards or backwards (fig.10) and a unfolded use position (fig.11). Requirement 5 Wind turbine according to claim 4, CHARACTERIZED IN THAT for the case where each pair of propeller blades (14a, 14b) is longer than the corresponding length of the diagonal (d) in the matrix opening, the blades are hinged (17) to be able to pass the matrix opening during insertion into the matrix opening. Requirement 6. Wind turbine in accordance with claim 1, CHARACTERIZED IN THAT each turbine comprises two or four pairs of propeller blades (14a, 14b). Claim 7 Wind power plant according to claim 1, CHARACTERIZED IN THAT said smaller frames define a square light opening (20) and turbines (12) with two or four propellers (14) are used, the distance, i.e. the diameter of the rotation circle d, from the end tip to a propeller blade to the end tip of the oppositely directed propeller blade, corresponds to the diagonal or hypotenuse of said square light opening, so that the propeller can be passed through the rig frame and up to the front face (11) of the rig (10) and made to rotate with its circle of rotation (30) with a diameter greater than the distance between adjacent columns/tubes (16,18) that define the rig (10). Claim 8 Wind power plant according to one of the previous claims, CHARACTERIZED IN THAT the turbine units are mounted in vertical and horizontal rows in the rig, and the turbines in the vertical columns (figure 2) are alternately analogous to a densely packed spherical shape in that it is arranged at different heights in relation to to adjacent rows of turbine units in the nearest row, to achieve a tighter packing of the turbines, so that each propeller blade (14) can move - rotate - into a triangular space 22 (figure 2) between two adjacent rotating propeller blades and without touching each other. Claim 9 Wind power plant according to one of claims 1 to 8, CHARACTERIZED IN THAT the turbine units, seen in a vertical view of the rig, are mounted in mutually parallel rows (A and B respectively) where the plane of rotation (30) of a turbine propeller is approximately tangent to the plane (30) of an adjacent propeller ( 30), as the next turbine row (A) is shifted laterally corresponding to 1⁄2 propeller diameter so that each propeller blade (14) can move - rotate - into a triangular space 22 (figure 3) between two adjacent rotating propeller blades and without to touch each other. Claim 10. Wind power plant according to previous claim 1, CHARACTERIZED IN THAT the turbine units (12) are alternately arranged at different distances from the rig's (10) front surface, so that the circular rotation planes (30) that the propellers (14) form parallel to the rig's front surface (11) overlap each other (figure 7). Claim 11 Wind turbine according to previous claim 7, CHARACTERIZED IN THAT every other turbine unit in a row (horizontal or vertical) is arranged with a first distance (50) from the front surface (11), while each adjacent turbine unit (12) in the rows is arranged with a second distance ( 52) from the front surface (11). Claim 12 Wind power plant according to one of the previous claims, CHARACTERIZED IN THAT the energy produced in the turbines in the matrix rig is transported down to transformers and conversion equipment by means of metal busbars, preferably aluminium, placed in insulated pipes. Claim 13 Wind turbine according to one of the previous claims, CHARACTERIZED IN THAT the power rails are designed as cylindrical aluminum profiles, where the sections are screwed together by means of "male and female" connections and preferably with a nut that encloses each joint Claim 14 Wind power plant according to one of the previous requirements, CHARACTERIZED IN THAT several floating wind power plants (10) are located in a wind park consisting of a central power plant and several satellites around the central power plant, where power from the satellites is carried on board the central power plant via separate cables through a swivel placed on the central power plant's turret and further connected together, possibly converted, transformed to the desired standard and so on sent to lan through the same swivel and turret that the power from the satellites came through when it was transferred to the central power plant Claim 15. Method for mounting turbines with propeller sets in a wind power plant, where the used wind power plant comprises a frame (10) on a floating pontoon (1,2,3) where the frame is constructed as a grid-shaped rig (10) standing upright on the pontoon (1,2 ,3) which form a plurality of rectangular or square openings in the rig (10) for receiving respective replaceable wind turbine generators (12) with associated drive propellers (14) which are driven by incoming wind (40), and where each wind turbine generator (12) is arranged to to be led up along the back of the rig (10) and into the openings towards the front side of the rig (11), CHARACTERIZED BY turbines with two or four pairs of propeller blades (14a, 14b) are used and the pairs of propeller blades are set so that they lie along the diagonal or hypotenuse of the aforementioned openings (20), and in which position the turbines with propellers are pushed forward through the opening, until the propellers have come into position in a position for rotational action at a distance in front of the front plane (11) of the rig (10). Claim 16. Method in accordance with claim 15, CHARACTERIZED IN THAT propeller blades are used where the length of said propeller diameter (14a+14b) is longer than the diagonal (d) of the rectangular or square openings (20). Claim 17. A method in accordance with claim 15, CHARACTERIZED IN THAT each propeller blade (14a, 14b) is pivoted about a hinge at (17) adjacent to the propeller housing (19) to be guided forward or backward through the opening, and to assume a deployed position of use after the turbine /propeller is moved to its position in front of the rig front (11). Claim 18. Method in accordance with claims 16-17, CHARACTERIZED IN THAT, the hinge (17) according to claim 17 is used for the case where each pair of propeller blades (14a, 14b) is longer than the corresponding length of the diagonal (d) in the matrix opening. Claim 19. Method in accordance with claims 16-17, CHARACTERIZED IN THAT turbines are used each with two or four pairs of propeller blades (14a, 14b). Claim 20. Method in accordance with one of claims 15-19, CHARACTERIZED IN THAT the turbine units are mounted in vertical and horizontal rows in the rig, and the turbines in the vertical columns (figure 2) are alternately arranged analogously to a densely packed spherical shape by being arranged at different heights in relative to adjacent rows of turbine units in the nearest row, to achieve a tighter packing of the turbines, so that each propeller blade (14) can move - rotate - into a triangular space 22 (Figure 2) between two adjacent rotating propeller blades and without to touch each other. Claim 21. Method in accordance with one of claims 15-20, CHARACTERIZED IN THAT the turbine units, seen in a vertical view of the rig, are mounted in mutually parallel rows (A and B respectively) where the plane of rotation (30) of a turbine propeller is approximately tangent to the plane (30) of an adjacent propeller (30), the next turbine row (A) being shifted laterally corresponding to 1⁄2 propeller diameter so that each propeller blade (14) can move - rotate - into a triangular space 22 (figure 3) between two adjacent rotating propeller blades and without touching each other. Claim 22. Method in accordance with claims 16-17, CHARACTERIZED IN THAT the turbine units (12) are arranged alternately at different distances (50/52) from the front surface (11) of the rig (10), so that the circular rotation planes (30) such as the propellers ( 14) form parallel to the rig's front surface (11), overlap each other (figure 7). Claim 23 Wind turbine according to previous claim 7, CHARACTERIZED IN THAT every other turbine unit in a row (horizontal or vertical) is arranged with a first distance (50) from the front surface (11), while each adjacent turbine unit (12) in the rows is arranged with a second distance (52 ) from the front surface (11).