Support frame for a freestanding solar system as well as freestanding solar system

Abstract

Support frame for supporting solar modules (22) of a freestanding solar power plant (10), wherein the support frame (18) is designed to be attached to a tracking device (20) of the solar power plant (10), which has a rotary drive (36, 38) having a rotor rotatable about an axis of rotation (V, H), wherein the support frame (18) has a first longitudinal beam (26) and a second longitudinal beam (28) which are spaced apart from each other perpendicular to their longitudinal axis and extend on both sides of the tracking device (20), characterized in that the support frame (18) has a tension cable arrangement (48) which has a first group of cable sections (50, 52, 66, 68; 54, 56, 70, 72), of which a first and a second cable section (50, 52; 54, 56) extend in a V-shape to one side of the rotor between the rotor of the rotary drive. (36, 38) and a respective first and second connection point (58, 60;62, 64) extend to the first and second longitudinal beams (26, 28) and are fixed to the rotor and to the respective first and second attachment points (58, 60; 62, 64), and wherein a third and a fourth cable section (66, 68; 70, 72) of the first group extend in a V-shape to the opposite side of the rotor between the rotor and a respective third and fourth attachment point (74, 76; 78, 80) on the first and second longitudinal beams (26, 28) and are fixed to the rotor and to the respective third and fourth attachment points (74, 76; 78, 80).

Description

[0001] The invention relates to a support frame for a freestanding solar power plant for supporting solar modules, wherein the support frame is designed to be attached to a tracking device of the solar power plant, which has a rotary drive having a rotor rotatable about an axis of rotation, wherein the support frame has a first longitudinal beam and a second longitudinal beam, which are arranged perpendicular to their longitudinal axis and extend on both sides of the tracking device.

[0002] The invention further relates to a freestanding solar power system with such a support frame.

[0003] In addition to building-integrated solar installations, particularly roof-mounted ones, solar installations mounted on a mast are also known. Freestanding solar installations have a support frame for the solar modules, which is mounted on the mast. Furthermore, freestanding solar installations can be equipped with a tracking device that allows the support frame and the solar modules mounted on it to follow the sun's position. The tracking device allows the solar modules to be moved around a vertical axis and / or a horizontal axis to adjust the orientation of the solar modules to the sun's position.

[0004] The supporting frame of a freestanding solar power system typically has an arrangement of longitudinal beams and crossbeams that are connected to each other.

[0005] In a freestanding solar power plant, the support frame is typically located several meters above the ground. The total area of ​​the solar modules in a freestanding solar power plant can be very large; for example, the total area can be up to 100 m². 2 or more. Due to the large distance between the solar module surface and the ground, wind can get underneath the solar module surface, and in high winds, the large overall surface area of ​​the solar modules can exert high forces on the support frame, which can lead to the frame tilting or even folding away, or in the worst case, even tearing off the support frame from the tracking device. Furthermore, even at lower wind speeds, forces can be transferred from the support frame to the tracking device, potentially damaging it.

[0006] The invention is based on the objective of providing a support frame for a freestanding solar power system that is more resistant to wind loads.

[0007] According to the invention, this problem is solved by a support frame of the type mentioned at the outset in that the support frame has a tension cable arrangement comprising a first group of cable sections, of which a first and a second cable section extend in a V-shape to one side of the rotor between the rotor of the rotary drive and a respective first and second attachment point on the first and second longitudinal beam and are fixed to the rotor and to the respective first and second attachment point, and wherein a third and a fourth cable section of the first group extend in a V-shape to the opposite side of the rotor between the rotor and a respective third and fourth attachment point on the first and second longitudinal beam and are fixed to the rotor and to the respective third and fourth attachment point.

[0008] According to the invention, the support frame for a freestanding solar power system has a tension cable arrangement that tensions the support frame to the rotor of the tracking device's rotary drive at at least four connection points or attachment points. This increases the rigidity of the support frame and allows wind forces acting on the support frame to be absorbed by the tension cable arrangement, thus making the support frame more resistant to wind forces and, in particular, reducing the risk of the support frame tipping over. The cable arrangement does not impede the tracking of the support frame to the sun's position, since the cable arrangement is attached to the rotor of the rotary drive and therefore rotates with the rotor. The at least four connection points or attachment points of the cable sections are located on the opposite side of the tracking device when viewed from the tracking device.It is understood that the tension cable arrangement can have not only four, but also more cable sections, as is provided in preferred embodiments. If the supporting frame has more than two longitudinal beams, e.g., 3, 4, or more, the connection points are preferably located on the two outermost longitudinal beams, i.e., the longitudinal beams that form the two outer longitudinal sides of the supporting frame. The longitudinal beams preferably run in a horizontal direction.

[0009] The first, second, third and / or fourth connection point can be positioned at the respective longitudinal end sections of the first and second longitudinal beams and / or at the respective longitudinal middle sections of the first and second longitudinal beams.

[0010] Preferably, the first and second attachment points are positioned at the same height with respect to the longitudinal direction of the first and second longitudinal beams, and / or the third and fourth attachment points are positioned at the same height with respect to the longitudinal direction of the first and second longitudinal beams.

[0011] In this design, wind forces can advantageously be absorbed symmetrically by the tension cable arrangement.

[0012] A particularly preferred embodiment is one in which the tension cable arrangement comprises a second group of cable sections, of which a first and a second cable section extend in a V-shape to one side of the rotor between the rotor of the rotary drive and a respective fifth and sixth attachment point on the first and second longitudinal beam and are fixed to the rotor and at the respective fifth and sixth attachment point, and wherein a third and a fourth cable section of the second group extend in a V-shape to the opposite side of the rotor between the rotor and a respective seventh and eighth attachment point on the first and second longitudinal beam and are fixed to the rotor and at the respective seventh and eighth attachment point.

[0013] This design is particularly advantageous because the at least eight cable sections of the cable arrangement result in optimized tensioning of the support frame on the tracking device and optimized stiffening of the support frame against wind forces.

[0014] It is preferred that the fifth and sixth connection points are spaced apart from the first and second connection points in the longitudinal direction of the first and second longitudinal beams, and that the seventh and eighth connection points are spaced apart from the third and fourth connection points in the longitudinal direction of the first and second longitudinal beams.

[0015] In this embodiment, the tension cable arrangement has two V-shaped cable section arrangements with different opening angles of the V-shape on both sides of the tracking device, whereby the tensile directions of the cable sections and the force introduction into the cable sections are distributed over several directional components, thereby securing the support frame on the tracking device even better against tilting moments caused by wind force.

[0016] Preferably, the first and second rope sections of the first group are sections of a single first tensioning rope, and / or the third and fourth rope sections of the first group are sections of a single connected second tensioning rope.

[0017] Compared to designing the cable sections as individual cables, this design offers the advantage of a reduced number of components and less assembly effort when mounting the tensioning cable assembly. Furthermore, in this design, only one cable needs to be tensioned instead of two.

[0018] It is still preferred if the first tensioning cable and / or the second tensioning cable is fixed to the rotor via a first and / or second cable deflection pulley attached to the rotor.

[0019] Attaching the tensioning cable(s) to the rotor by means of a pulley has the advantage that only one tensioning device is required to tension the respective tensioning cable, since the cable pulley distributes the tension evenly across both cable sections of the respective tensioning cable.

[0020] Preferably, the first and second rope sections of the second group are also sections of a single connected third tensioning rope and / or the third and fourth rope sections of the second group are sections of a single connected fourth tensioning rope.

[0021] It is also preferred if the third tensioning cable and / or the fourth tensioning cable is fixed to the rotor via a third and / or fourth cable deflection pulley attached to the rotor.

[0022] It is particularly preferred if the first and third rope deflection pulley and / or the second and fourth rope deflection pulley is a single rope deflection pulley with two rope sheaves arranged in a common deflection pulley housing, wherein the first tensioning rope is fixed to the disc via a first rope deflection pulley fixed to the disc.

[0023] The advantage here is a more compact design of the tension cable arrangement as well as a simplified assembly of the tension cable arrangement, since only a single cable deflection pulley needs to be attached to the rotor of the tracking device.

[0024] It is also preferred that one or more of the aforementioned rope sections are fixed at the respective connection point by means of a turnbuckle.

[0025] To further increase the stiffness of the support frame, a preferred embodiment provides that the support frame has at least one cross member that connects the first longitudinal member and the second longitudinal member transversely to the longitudinal direction of the longitudinal members.

[0026] Individual cable sections of the tension cable arrangement can be fixed at the connection points of the crossbeam with the longitudinal beams, so that the crossbeam can absorb the shear forces exerted by the respective cable section and thus the longitudinal beams cannot be bent towards each other due to the tensile force of the respective cable section.

[0027] In a further preferred embodiment, the rotor to which the tension cable arrangement is fixed is rotatable about a vertical axis of rotation, wherein the tracking device preferably has a further rotary drive with a rotor rotatable about a horizontal axis of rotation, and wherein the tension cable arrangement is spaced away from the horizontal axis of rotation in the area of ​​the tracking device.

[0028] Preferably, in this embodiment, the support frame can be fixed to the rotary drive with a horizontal axis of rotation by means of an additional longitudinal beam, such that the center of mass of the solar module area coincides with the intersection of the horizontal and vertical axes of rotation. The rotor with a horizontal axis of rotation rotates together with the support frame about the vertical axis of rotation when the rotary drive rotates the support frame about the vertical axis. The rotor with a vertical axis of rotation, to which the cable assembly is attached, is located below the intersection of the horizontal and vertical axes of rotation.In this context, the above-mentioned design of connecting the rope sections to the rotor of the tracking device via a deflection pulley is particularly advantageous, since the deflection pulley allows a slight movement of the rope sections when the support frame is pivoted around the horizontal axis of rotation in order to allow for length compensation between the rope sections guided around the deflection pulley, which is necessary due to the offset between the connection of the rope sections to the rotor with a vertical axis of rotation and the horizontal axis of rotation.

[0029] Preferably, the rope arrangement is mirror-symmetrical with respect to the vertical axis of rotation.

[0030] Preferably, the aforementioned rope sections are made of steel. While the rope sections can also be formed using tension straps, wire ropes have the advantage of being able to withstand particularly high tensile loads.

[0031] According to the invention, a freestanding solar power system is also provided, comprising a mast, a tracking device and a support frame according to one or more of the aforementioned embodiments, wherein the tracking device is attached to the mast and the support frame is attached to the tracking device.

[0032] The freestanding solar power system has the same advantages as described above in connection with the support frame according to the invention and its preferred embodiments.

[0033] Further advantages and features will become apparent from the following description and the attached drawing.

[0034] It is understood that the features mentioned above and those to be explained below can be used not only in the combinations specified, but also in other combinations or on their own, without leaving the scope of the present invention.

[0035] An embodiment of the invention is shown in the drawing and is described in more detail below with reference to it. The drawing shows: Fig. 1 a freestanding solar power plant with a side view of a mast of the solar power plant and a view of the underside of a support frame fitted with solar modules; Fig. 2 A view of the underside of the support frame of the solar system in Fig. 1, wherein an upper section of the mast with a tracking device is shown in side view; Fig. 3 a detail of the tracking device in the area of ​​a rotary drive for tracking about a vertical axis of rotation; Fig. 4. Partial illustration of a design for connecting a cable arrangement of the support frame to the tracking device; Fig. 5. Partially shown, the support frame with an embodiment of the attachment of the tension cable arrangement to a central section of a longitudinal beam of the support frame; Fig. 6. Partially shown, the support frame with an embodiment of the attachment of the tension cable arrangement to an end section of a longitudinal beam of the support frame; and Fig. 7 a turnbuckle for tensioning a tensioning cable of the tensioning cable arrangement.

[0036] In Fig. Figure 1 shows a freestanding solar power plant designated with the general reference numeral 10. The solar power plant 10 has a mast 12 which is fixed in a foundation 14, for example a concrete foundation. The solar power plant 10 also has a support frame 18, which will be referred to later in relation to Fig. 2 is described in more detail. The solar array 10 is equipped with a tracking device 20 to which the support frame 18 is attached. The tracking device 20 enables the support frame 18 to be adjusted to changes in the sun's position about a vertical axis of rotation V and about a horizontal axis of rotation H. The support frame 18 is fitted with a plurality of solar modules 22, wherein Fig. Figure 1 shows a view of the respective underside of the solar modules 22. The solar modules 22 are attached to the support frame 18 by means of a plurality of strips 24, which are fixed to the support frame 18 and which are, for example, in the form of aluminum profiles.

[0037] In Fig. Figure 2 shows the support frame 18 without the solar modules 22 and without the strips 24.

[0038] The support frame 18 according to Fig. 2 has a first longitudinal beam 26 and a second longitudinal beam 28. The longitudinal beams 26 and 28 extend horizontally, i.e., parallel to the horizontal axis of rotation H, when the solar array 10 is erected. The support frame 18 according to Fig. The assembly 2 further comprises two crossbeams 30 and 32, which connect the longitudinal beams 26 and 28 transversely to their longitudinal direction and are rigidly connected to them. The longitudinal beams 26 and 28 extend on both sides of the tracking device 20, and the crossbeams 30 and 32 are arranged on both sides of the tracking device 20. The crossbeams 30 and 32 extend parallel to the vertical axis of rotation V of the tracking device 20. The support frame 18 is attached to the tracking device 20 via a further longitudinal beam 34.

[0039] It is understood that, depending on its size, i.e., depending on the size of the area of ​​solar modules 22 that the support frame 18 is to support, it may have more than the two longitudinal beams 26 and 28, for example, 4 or 6 longitudinal beams, where the longitudinal beams 26 and 28 are, for the following description, the outer longitudinal beams viewed in the direction of the vertical axis of rotation. The support frame 18 may have more than two crossbeams 30, 32.

[0040] The tracking device 20 has a first rotary drive 36 for tracking the support frame 18 about the vertical axis of rotation V and a second rotary drive 38 for tracking the support frame 18 about the horizontal axis H. The rotary drive 38 rotates with the support frame 18 about the vertical axis of rotation V when the rotary drive 36 for tracking the support frame 18 about the vertical axis of rotation V is in operation. The further longitudinal beam 34 is connected to the rotary drive 38 for tracking about the horizontal axis of rotation H, i.e., the support frame 18 as a whole is attached to the rotary drive 38 by means of the longitudinal beam 34. The longitudinal beam 34 may pass through the rotor of the rotary drive 38. The longitudinal beam 34 is rigidly connected at its ends to the crossbeams 30 and 32.

[0041] The center of mass of the support frame 18 or of the total area of ​​the solar modules 22 is located at the intersection between the vertical axis of rotation V and the horizontal axis of rotation H, with this intersection being approximately in the middle of the rotor of the rotary drive 38 of the tracking device 20.

[0042] Furthermore, the longitudinal beams 26 and 28 are connected to each other by means of tie rods 40 and 42 running perpendicular to the longitudinal beams 26, 28, and also by means of diagonally running tie rods 44 and 46, which connect the longitudinal beams 26 and 28 to each other in the area of ​​the attachment of the crossbeams 30 and 32 to the longitudinal beams 26, 28.

[0043] The support frame 18 has a tension cable arrangement 48, which is described below with reference to Fig. 2 is described, with details of the rope tensioning arrangement 48 referring to Fig. 3, Fig. 4, Fig. 5, Fig. 6 to Fig. 7 will be described.

[0044] The tension cable arrangement 48 has a plurality of cable sections. A first group of cable sections comprises cable sections 50, 52, 66 and 68. Cable sections 50 and 52 extend in a V-shape between the tracking device 20 and attachment points 58, 60 at the end sections of the longitudinal beams 26, 28 and are fixed at one end to the attachment points 58, 60, and at the other end to the rotary drive 36 of the tracking device 20, as will be described in more detail below. The cable sections 66 and 68 extend to the opposite side of the tracking device 20 between the tracking device 20 and attachment points 74 and 76 on the end sections of the longitudinal beams 26, 28 and are fixed at the attachment points 74, 76 on the longitudinal beams 26, 28 and at the other end on the rotary drive 36 of the tracking device 20. The cable sections 50 and 52 are sections of a single continuous tension cable 51, in particular a wire rope.Similarly, rope sections 66 and 68 are sections of a continuous tensioning rope 67, in particular a wire rope. The aforementioned connection points are located in . Fig. 2 highlighted by a respective circle.

[0045] As from Fig. As can be seen from Figure 2, the rope sections 50, 52 and 66, 68 are located in the area of ​​the rotary drive 36 below the horizontal axis of rotation H, and are thus offset relative to it in the direction of the vertical axis of rotation V.

[0046] The cable arrangement 48 further comprises a second group of cable sections 54, 56, 70, 72. The cable sections 54 and 56 extend in a V-shape between the tracking device 20 and attachment points 62, 64 on longitudinal center sections of the longitudinal beams 26, 28 and are fixed on one side at the attachment points 62, 64 on the longitudinal center sections, and on the other side at the rotary drive 36 of the tracking device 20, as will be described in more detail below. The cable sections 70 and 72 extend to the opposite side of the tracking device 20 between the tracking device 20 and attachment points 78, 80 on longitudinal center sections of the longitudinal beams 26, 28 and are fixed at the attachment points 78, 80 on the longitudinal beams 26, 28 and at the other end to the rotary drive 36 of the tracking device 20. The cable sections 54 and 56 are sections of a single continuous tension cable 55, in particular a wire rope.Similarly, rope sections 70 and 72 are sections of a continuous tension rope 71, in particular a wire rope. The aforementioned connection points are located in . Fig. 2 highlighted by a respective circle.

[0047] The longitudinal center sections are located approximately halfway along the length of the longitudinal beams 26, 28, from the tracking device to the end sections of the longitudinal beams 26, 28. The crossbeams 30, 32 are attached to the longitudinal center sections 62, 64 and 78, 80, respectively. The connection points on the longitudinal beams 26, 28 are located in pairs opposite each other at the same height along the longitudinal direction of the longitudinal beams 26, 28.

[0048] Cable sections 54 and 56 are shorter than cable sections 50 and 52. Similarly, cable sections 70 and 72 are shorter than cable sections 66 and 68. Consequently, the opening angle of the V-shape in cable sections 50 and 52, and 66 and 68, is smaller than the opening angle of the V-shape in cable sections 54 and 56, and 70 and 72, respectively. In other words, the direction of pull of tension cables 52 and 55 is different, as is the direction of pull of tension cables 67 and 71.

[0049] With reference to Fig. 3 and Fig. Section 4 describes in detail an embodiment of the connection of the rope sections 66, 68, 70, 72 to the tracking device 20. The same description applies analogously to the connection of the rope sections 54, 56, 50 and 52 to the tracking device 20.

[0050] Fig. Figure 3 shows a section of the tracking device 20 in the area of ​​the rotary drive 36 for tracking the support frame 18 about the vertical axis of rotation V. The drive 36 has a rotor 82 which is rotatable about the vertical axis of rotation V. The rotor has the shape of a disc. The two tension cables 67 and 71, which have the cable sections 70, 72 and 66, 68 respectively, are guided on the rotor 82 over a deflection pulley 88, the deflection pulley 88 having a pulley for each tension cable 67, 71. Fig. In figure 4, only a pulley 90 for the tensioning cable 71 is visible. The deflection pulley 88 can be connected to a fitting 94 via a shackle 92. The fitting 94 can be attached to the rotor 82 in Fig. 3 are fastened by means of screws 96, the screws 96 passing through openings 98 of the fitting 94.

[0051] It is advantageous if the shorter tensioning cable 71 lies above the longer tensioning cable 67 in the deflection pulley 88, as shown in Fig. 4 is shown.

[0052] With reference to Fig. 5, Fig. 6 to Fig. Section 7 describes an embodiment for connecting the cable sections 66 and 70 to the longitudinal beam 26. The same description applies analogously to connecting the cable sections 50, 52, 54, 56, 68, 72 to the longitudinal beams 26, 28.

[0053] Fig. Figure 5 shows an example of the connection of the cable section 70 to the longitudinal center section 78 of the longitudinal beam 26. The connection is made indirectly via a mounting plate 100, to which the crossbeam 32 is attached to the longitudinal beam 26. The connection of the cable section 70 to the longitudinal center section 78 is made via a turnbuckle 102, as shown in Fig. Figure 7 shows the turnbuckle 102 being fastened to the central section 78 of the longitudinal beam 26 by means of a shackle 104, the shackle 104 engaging an eyelet 106 of the turnbuckle 102. The cable section 70 is guided through the opposite eyelet 108 of the turnbuckle 102 and can then be secured to itself with a cable clamp (not shown). Only one turnbuckle is required for the tensioning cable 71 due to the deflection at the pulley, while the other end of the tensioning cable 71 can be fastened to the longitudinal beam 28 without a turnbuckle. However, turnbuckles can be provided at both ends of the tensioning cable 71.

[0054] Fig. Figure 6 shows, by way of example, the connection of the cable section 66 to the end section 74 of the longitudinal beam 26 by means of a turnbuckle 102', which can be designed in the same way as the turnbuckle 102 in Fig. 7.

[0055] Since cable sections 50 and 52 are sections of a single, continuous wire rope, as are cable sections 54 and 56, 70 and 72, and 66 and 68, only one turnbuckle 102 is required for each, i.e., a total of four turnbuckles, to tension the wire ropes. The wire ropes are tensioned in such a way that, on the one hand, they are tensioned with sufficient tensile stress, but on the other hand, the longitudinal beams 26 and 28 are not bent.

Claims

[1] Support frame for supporting solar modules (22) of a freestanding solar power plant (10), wherein the support frame (18) is designed to be attached to a tracking device (20) of the solar power plant (10) which has a rotary drive (36, 38) having a rotor rotatable about an axis of rotation (V, H), wherein the support frame (18) has a first longitudinal beam (26) and a second longitudinal beam (28) which are spaced apart from each other perpendicular to their longitudinal axis and extend on both sides of the tracking device (20), characterized by, that the support frame (18) has a tension cable arrangement (48) comprising a first group of cable sections (50, 52, 66, 68; 54, 56, 70, 72), of which a first and a second cable section (50, 52; 54, 56) extend in a V-shape to one side of the rotor between the rotor of the rotary drive (36, 38) and a respective first and second attachment point (58, 60; 62, 64) on the first and second longitudinal beam (26, 28) and are fixed to the rotor and to the respective first and second attachment point (58, 60; 62, 64), and wherein a third and a fourth cable section (66, 68; 70, 72) of the first group extend in a V-shape to the opposite side of the rotor between the rotor and a respective third and fourth attachment point (74, 76; 78, 80) extend to the first and second longitudinal beams (26, 28) and are fixed to the rotor and to the respective third and fourth attachment points (74, 76; 78, 80). [2] Support frame according to claim 1, wherein the first, second, third and / or fourth attachment point (58, 60, 74, 76) are positioned on respective longitudinal end sections of the first and second longitudinal beam (26, 26). [3] Support frame according to claim 1, wherein the first, second, third and / or fourth attachment point (74, 76, 78, 80) are positioned on respective longitudinal center sections of the first and second longitudinal beams (26, 28). [4] Support frame according to one of claims 1 to 3, wherein the first and second attachment point (58, 60; 62, 64) are positioned at the same height with respect to the longitudinal direction of the first and second longitudinal beam (26, 28). [5] Support frame according to one of claims 1 to 4, wherein the third and fourth attachment points (74, 76; 78, 80) are positioned at the same height with respect to the longitudinal direction of the first and second longitudinal beams (26, 28). [6] Support frame according to any one of claims 1 to 5, wherein the tension cable arrangement (48) comprises a second group of cable sections (50, 52, 66, 68; 54, 56, 70, 72), of which a first and a second cable section (50, 52; 54, 56) extend in a V-shape to one side of the rotor between the rotor of the rotary drive and a respective fifth and sixth attachment point (58, 60; 62, 64) on the first and second longitudinal beams (26, 28) and are fixed to the rotor and to the respective fifth and sixth attachment point (58, 60; 62, 64), and wherein a third and a fourth cable section (66, 68; 70, 72) of the second group extend in a V-shape to the opposite side of the rotor between the rotor and a respective seventh and eighth attachment point (74, 76; 78, 80) extend to the first and second longitudinal beams (26, 28) and are fixed to the rotor and to the respective seventh and eighth attachment points (74, 76; 78, 80). [7] Support frame according to claim 6, wherein the fifth and sixth attachment point (62, 64) are spaced apart from the first and second attachment point (58, 60) in the longitudinal direction of the first and second longitudinal beam (26, 28), and wherein the seventh and eighth attachment point (78, 80) are spaced apart from the third and fourth attachment point (74, 76) in the longitudinal direction of the first and second longitudinal beam (26, 28). [8] Support frame according to any one of claims 1 to 7, wherein the first and second rope sections (50, 52) of the first group are sections of a single connected first tensioning rope (51) and / or the third and fourth rope sections (66, 68) of the first group are sections of a single connected second tensioning rope (67). [9] Support frame according to claim 8, wherein the first tension cable (51) and / or the second tension cable (67) is fixed to the rotor via a first and / or second cable deflection pulley attached to the rotor. [10] Support frame according to claim 6 and one of claims 7 to 9, insofar as it relates back to claim 6, wherein the first and second rope sections (54, 56) of the second group are sections of a single connected third tension rope (55) and / or the third and fourth rope sections (70, 72) of the second group are sections of a single connected fourth tension rope (71). [11] Support frame according to claim 10, wherein the third tension cable (55) and / or the fourth tension cable (71) is fixed to the rotor via a third and / or fourth cable deflection pulley attached to the rotor. [12] Support frame according to claims 9 and 11, wherein the first and third cable deflection pulley and / or the second and fourth cable deflection pulley is a single cable deflection pulley with two cable sheaves arranged in a common deflection pulley housing. [13] Support frame according to one of claims 1 to 12, wherein the respective first and / or second and / or third and / or fourth rope section of the first and / or second group is fixed at the respective attachment point by means of a turnbuckle (102). [14] Support frame according to any one of claims 1 to 13, wherein the support frame (18) has at least one cross member (30, 32) which connects the first longitudinal member (26) and the second longitudinal member (28) transversely to the longitudinal direction of the longitudinal members (26, 28). [15] Support frame according to one of claims 1 to 14, wherein the rotor (82) to which the tension cable arrangement (48) is fixed is rotatable about a vertical axis of rotation (V). [16] Support frame according to claim 15, wherein the tracking device (20) has a further rotary drive with a rotor rotatable about a horizontal axis of rotation (H), and wherein the tension cable arrangement (48) is spaced apart from the horizontal axis of rotation (H) in the area of ​​the tracking device (20). [17] Support frame according to one of claims 1 to 16, wherein the tension cable arrangement (48) is mirror-symmetric with respect to the vertical axis of rotation (V). [18] Support frame according to any one of claims 1 to 17, wherein the rope sections of the first group and / or the rope sections of the second group are made of steel. [19] Freestanding solar power system comprising a mast (12), a tracking device (20) and a support frame (18) according to any one of claims 1 to 18, wherein the tracking device (20) is attached to the mast (12) and the support frame (18) is attached to the tracking device (20).

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