CH717416B1 - Supporting structure for vertically arranged photovoltaic modules. - Google Patents

Abstract

A support structure for holding at least one row of vertically arranged PV modules (29) comprises vertical posts (3) arranged spaced apart in the row direction (2), which are attached to support feet (4), with which the support structure can be mounted on a substructure. At least the posts (3) lying between other posts (3) of the at least one row each have a first and a second partial post (3a, 3b), which have relative mobility parallel to the row direction (2).

Description

The invention relates to a support structure for holding at least one row of vertically arranged PV modules, comprising vertical posts spaced apart in the row direction, which are attached to support feet, with which the support structure can be mounted on a substructure, between successive ones Posts in a row each have a PV module that can be mounted directly on the posts and/or on at least one horizontal bar running between the posts.

Conventionally, photovoltaic (PV) modules are mounted in an inclined position, usually facing south. Such PV modules are unifacial, meaning they only have an active surface on the top.

In the case of bifacial PV modules, which have an active surface on both sides, the installation takes place vertically, often in a north-south orientation, so that the power peaks are achieved in the morning and evening. Even in snowy areas, a vertical arrangement of, preferably bifacial, PV modules can be advantageously provided.

[0004] A supporting structure of the type mentioned at the beginning for the vertical assembly of PV modules is shown in WO 2018/115120 A2. The vertical posts are anchored here in particular in the ground, with C-profiles, which form support feet for the vertical posts, being inserted into the ground.

If vertically arranged PV modules are to be installed on flat roofs, the roof skin should not be penetrated. Plastic corrugated panels, onto which a fill is applied, can be provided as a substructure to which the support feet of the supporting structure are attached. Parallel rails attached to the plastic corrugated plates can be provided between the support feet and the corrugated plastic plates. Such a type of substructure leads to construction tolerances in the position of the mounting points for the support feet, among other things due to the fact that flat roofs are usually not completely flat and also have a certain inclination.

Such support structures must be able to withstand large wind loads due to the flat design of the upright PV modules.

Due to the thermal expansion to which the support structure is exposed, such support structures for vertically aligned PV modules generally have separation points arranged after a few modules in order to minimize the effects of thermal expansion in the row direction, or consist of separate units which contain only one module or just a few modules (usually 1-6). Especially with vertically arranged PV modules, individual modules pulling out of an essentially straight row due to constraint forces would be particularly noticeable.

The object of the invention is to provide a support structure of the type mentioned at the outset, with which vertically arranged PV modules can be mounted in an advantageous manner, enabling thermal dilations to be recorded in the horizontal direction. According to the invention, this is achieved by a supporting structure with the features of claim 1.

In the supporting structure according to the invention, at least the posts located between other posts of the at least one row, i.e. the posts not located at the two ends of the at least one row, each have a first and a second partial post, the first and second Partial posts have mobility relative to each other in the direction of the row. The PV module located on one side of this post can be attached to the first sub-post and/or the at least one horizontal bar located on one side of the post can be attached. The PV module located on the other side of this post can be attached to the second sub-post and/or the at least one horizontal bar located on the other side of this post can be attached.

The design according to the invention allows thermal dilations to be recorded on a respective post. This can advantageously form a continuous row with a plurality of PV modules, preferably more than five, particularly preferably ten or more PV modules.

A supporting structure according to the invention is particularly suitable for arrangement on a flat roof.

A possible embodiment of the invention provides that the two partial posts are each mounted movably relative to the support foot assigned to this post, so that the two partial posts are independently movable relative to the support foot in the row direction (within a certain range). In principle, it would also be conceivable and possible for such a movable mounting relative to the support foot to be carried out for only one of the two partial posts, while the other partial post is rigidly connected to the support foot.

Another possibility is that the support feet are designed to be elastically deformable, so that at least one of the two partial posts can move in the row direction through elastic deformation of the support foot. Preferably, both partial posts are movable independently of one another in the row direction by a respective deformation of a different part of the support foot. The partial posts can be rigidly connected to the respective support foot. A particularly advantageous embodiment provides that the support feet are also formed by two separate components, with the first support foot part being rigidly connected to the first part of the post and the second support foot part being rigidly connected to the second part of the post. When assembling the supporting structure to the substructure, the relative position of the two support foot parts can be adapted to the existing construction tolerances, for example by means of elongated holes in the support foot parts, which are penetrated by screws. This makes it possible to achieve a particularly high degree of adaptability to construction tolerances.

Mutual mobility of the two sub-posts in the row direction can also be made possible in that the first sub-post is rigidly connected to a first support foot part and the second sub-post is rigidly connected to a second support foot part, with at least one of the two support foot parts being separate components represent, preferably both support foot parts are mounted movably relative to the substructure.

In an advantageous embodiment of the invention, the two sub-posts of a respective post each have a base web and, at both ends of the base web, side legs projecting from this in the direction of the other sub-post. The side legs of the two partial posts overlap each other via sections adjoining their free ends. This means that the two partial posts can be pushed more or less far into each other. The space completely surrounded by the two partial posts can be used, for example, to guide cables. In particular, the two partial posts are U-profiles that can be inserted into one another at right angles to the direction of their longitudinal extent.

In an expedient embodiment of the invention, the support feet to which the posts lying between other posts of the at least one row are attached, preferably all support feet, can have at least one floor web that can be fastened to a substructure and first and second fastening webs projecting upwards from this , between which a lower end section of the post protrudes. The fastening webs are conveniently located at right angles to the direction of the row. In a possible embodiment of the invention, the at least one floor web can have elongated holes which extend parallel to the row direction and through which screws can be passed for fastening to a substructure.

An advantageous embodiment of the invention provides that the first partial post is rigidly connected to the first fastening web and the second partial post is rigidly connected to the second fastening web and the fastening webs in the connection area with the partial posts have an elastic flexibility parallel to the row direction. Here, the at least one floor web can be removed in a central region of the respective support foot in relation to the direction perpendicular to the row direction, this region extending in both directions at right angles to the row direction beyond the extents of the partial posts in this direction.

If the support feet are designed in two parts in an advantageous embodiment of the invention, a first support foot part can have the first fastening web, which is rigidly connected to the first sub-post, and a second support foot part can have the second fastening web, which is rigidly connected to the second sub-post is, whereby the two support foot parts can be fastened to the substructure in different mutual positions based on the direction perpendicular to the row direction. Each of the support foot parts can advantageously have at least one floor web, from which the respective fastening web protrudes upwards, the floor webs being able to be fastened to the substructure in a more or less mutual overlap.

The free positioning of the two support foot parts in relation to the row direction over a certain area in conjunction with the mutual mobility of the two partial posts makes it possible to adapt to construction tolerances, which can advantageously be relatively large.

A respective post is advantageously designed overall in the form of a hollow profile. This is preferably formed by the two partial posts together.

The invention further relates to a PV system with at least one row of vertically arranged PV modules which are attached to such a support structure. The supporting structure is in particular attached to a substructure which has panels, preferably plastic corrugated panels, which are covered by a fill.

Further advantages and details of the invention are explained below with reference to the accompanying drawing. This shows: FIG. 1 an oblique view of three rows of PV modules mounted vertically in a supporting structure, according to an exemplary embodiment of the invention; Fig. 2 shows an enlarged detail in the area of a support foot; Fig. 3 an enlarged detail in the upper edge area of a post (from a different viewing direction); Fig. 4 is a top view; Fig. 5 shows an enlarged detail of Fig. 4 in the area of a vertical post; Fig. 6 one of the rows in view; Fig. 7 shows an enlarged detail of Fig. 6 in the area of a support foot; Fig. 8, 9 oblique views of the support foot parts from different viewing directions; Fig. 10 is an oblique view of the supporting structure mounted on a modified substructure; Fig. 11 is an oblique view of a further exemplary embodiment of the invention; 12 shows an enlarged detail of FIG. 11 in the area of a support foot; 13 shows an enlarged detail of a view of one of the rows in the area of a support foot; Fig. 14 is an oblique view of a further exemplary embodiment of the invention; Fig. 15 is an enlarged detail of Fig. 14.

A first exemplary embodiment of the invention is explained below with reference to FIGS. 1 to 9. Vertically arranged PV (photovoltaic) modules 1 are mounted on a supporting structure according to the invention. 1 shows three rows of vertically arranged PV modules 1, each row containing three PV modules 1. In practice, significantly more PV modules can be arranged in a row, for example ten or more.

The supporting structure has vertical posts 3 spaced apart in the row direction (= in the longitudinal direction of the row of PV modules 1). The posts 3 are attached to support feet 4, which in turn are mounted on a substructure. The substructure comprises plates arranged at a distance on the subsurface, in particular a flat roof, which are formed, for example, by corrugated plastic plates 5, and rails 6 mounted on these plates, which run parallel to one another and at right angles to the row direction 2. A filling is preferably applied over the plastic corrugated panels 5 (not shown in the figures). The support feet 4 of the different rows are arranged above the rails 6 and are rigidly connected to them, preferably by screw connections.

Horizontal bars 7, 8 run between the posts 3. The PV modules 1 are each held between a lower bar 7, on which they rest, and an upper bar 8.

Those posts 3 that are not at one end of the respective row (= middle posts) each have a first and a second partial post 3a, 3b, which are separate components.

The two partial posts 3a, 3b extend over the same height in the exemplary embodiment.

The two sub-posts 3a, 3b can be designed as shown in the form of U-profiles and each have a base web 9, 10 and, at both ends of the base web 9, 10, side legs 11, 12 projecting from this in the direction of the other sub-post on. The distance between the side legs 11 of the first partial post 3a is greater than the distance between the side legs 12 of the second partial post 3b. The two partial posts 3a, 3b can thus be inserted more or less far into one another in the direction at right angles to their longitudinal extent with side legs 11, 12 directed towards one another, the side legs 11, 12 of the two partial posts 3a, 3b overlapping over sections adjoining their free ends . A channel-like gap 13 is thus formed, surrounded on all sides by the partial posts 3a, 3b, through which, for example, cables for electrical contacting of the PV modules 1 can be guided (not shown in the figures). The partial posts 3a, 3b together form a hollow profile.

The posts 3' arranged on the two edges of a respective row can be formed by only one of the two partial posts 3a, 3b, which have the middle posts 3.

In this exemplary embodiment, those support feet 4 that are not located at one end of the respective row (=middle support feet) each have a first and a second support foot part 4a, 4b, which are separate components. Each of the two support foot parts 4a, 4b has a base web 14, 15, which is removed in a central region of the support foot part 4a, 4b with respect to the direction perpendicular to the row direction 2, i.e. one could also say that for each support foot part 4a, 4b there are two floor webs lying in one plane and spaced apart from one another in the direction perpendicular to the row direction 2.

If there are construction tolerances, for example if the rails 6 have slightly larger or slightly smaller distances from one another than intended, the partial posts 3a, 3b can be pushed into one another at different distances during assembly of the supporting structure, so that the floor webs 14, 15 of the Support foot parts 4a, 4b overlap to different extents, whereby the support foot parts 4a, 4b can be screwed to the rails 6 in the appropriate position.

The lower horizontal bars 7 running below the PV modules 1 each have an elongated base body (which extends at least substantially over the entire length of the bar 7) and fastening tabs projecting upwards and downwards at the two ends of the base body 7a, 7b. In the exemplary embodiment, the base body is designed overall as a hollow body (which can consist of several partial profiles), as is preferred. This enables cable routing through a respective lower bar.

The fastening tabs 7a, 7b each rest on a fastening web 16, 17 of a respective support foot part 4a, 4b. In the exemplary embodiment, the fastening tabs 7a, 7b are riveted to the relevant partial post 3a, 3b together with the fastening web 16, 17 lying between them (only the holes 19, 20 for the rivets are shown in the figures, but the rivets themselves are shown for the sake of simplicity not). Other types of rigid connection of the fastening webs 16, 17 and the bars 7 to the partial posts 3a, 3b are also conceivable and possible, for example by means of screw connections or welds. In the area of their lower ends, the partial posts 3a, 3b are additionally connected to the fastening webs 16, 17, for example by riveting (for the sake of simplicity, only the holes 21 are shown in the figures, but not the rivets).

[0034] As shown in the exemplary embodiment, at least one fastening point of the respective fastening web 16, 17, with which it is fastened to the respective partial post 3a, 3b, can be provided, which lies above the base body of the respective lower horizontal bar 7, which is also on This partial post 3a, 3b is attached, for example via fastening tabs 7a, 7b or in another way.

A fastening web 16, 17 projects upwards from the bottom web 14, 15 of the respective support foot part 4a, 4b.

The fastening webs 16, 17 are aligned at right angles to the row direction 2 and taper upwards.

The fastening web 16 of the first support foot part 4a is rigidly connected to the first partial post 3a and the fastening web 17 of the second support foot part 4b is rigidly connected to the second partial post 3b. The floor webs 14, 15, which lie on top of each other and overlap one another, have overlapping elongated holes 14a, 15a which extend in the row direction 2 and are penetrated by screws 18 with which the support feet 4 are attached to the substructure, in the exemplary embodiment on the rails 6 are attached.

The support feet 4' arranged on the two edges of a respective row can be formed by only one of the two support foot parts 4a, 4b, which have the middle support feet 4.

The PV modules 1 are connected to the lower bars 7 by means of holders 22. The holders 22 can be, for example, U-profiles which are connected to the top of the lower bar 7 in the area of their base web, for example by riveting, screwing or welding. In these U-profiles, which are preferably made of metal, rubber-elastic holding parts with a U-shaped cross section can be inserted, on which the PV modules 1 rest with their lower edges (not visible in the figures).

The upper bars 8 running above the PV modules 1 between the posts 3 hold the PV modules 1 in the area of their upper edges. For this purpose, the upper bars 8 in the exemplary embodiment are designed in the form of U-profiles that are open at the bottom. Rubber-elastic holding parts with a U-shaped cross section are inserted into these, into which the PV modules protrude in the area of their upper edges (not visible in the figures). The two ends of the upper bars 8 are connected to the respective partial posts 3a, 3b, between which they run. In the exemplary embodiment, the partial posts 3a, 3b have openings 23 into which the ends of the upper bars 8 are inserted, with a groove being formed on the underside of the upper bars 8, in which the upper end of the base web 9, 10 of the respective partial post 3a, 3b is included. In order to prevent the grooves from being pulled out upwards, split pins can, for example, be inserted into the openings 23 of the partial posts 3a, 3b above the ends of the upper bars 8 (not shown in the figures). Other ways of attaching the upper bars 8 to the post 3 are conceivable and possible.

The fastening webs 16, 17 of the support feet 4 have elastic bendability in the row direction in the areas in which they are connected to the partial posts 3a, 3b. In the exemplary embodiment, this is achieved in particular in that the bottom webs 14, 15 of the support foot parts 4a, 4b are removed in a central region of the respective support foot 4 in relation to the direction perpendicular to the row direction, this region extending in both directions at right angles to the row direction over the in This direction extends the respective partial post 3a, 3b. This enables movements of the partial posts 3a, 3b parallel to the row direction and independently of one another with elastic deformation of the fastening webs 16, 17.

Starting from middle positions in which the fastening webs 16, 17 have no elastic deformations, each partial post 3a, 3b is advantageously at least 2 mm, preferably by at least 4 mm in and against the row direction 2 with elastic deformation of the respective fastening web 16. 17 movable.

If changes in length occur due to different thermal expansions at different temperatures, here in particular of the lower bar 7, such changes in length can thus be absorbed by the supporting structure. Nevertheless, the construction is very stable against wind loads that act at right angles to the direction of the row.

The support foot parts can have recesses 31 for the passage of cables, which can also be omitted.

To assemble the PV system, modular units can advantageously first be formed, which can then be assembled as a whole. Such a modular unit can be formed by a lower bar 8 together with a support foot part 4a or 4b and partial posts 3a or 3b attached to a respective end. These modular units can then be continuously connected to each other and to the substructure using the screws 18 to form the respective row. As a result, the PV modules 1 can be used. For this purpose, a respective PV module 1 is inserted with its lower edge into the holder 22. As a result, the upper latch 8 is inserted into the opening 23 of one of the partial posts 3a, 3b delimiting this assembly location, the upper latch 8 being initially tilted and then folded down so that the upper edge of the PV module is received. Furthermore, the upper bar 7 is inserted into the opening 23 of the opposite partial post 3a, 3b and the upper bar 8 is fixed in the openings 23, for example by inserting split pins.

The assembly described above could also be modified in such a way that the assembly of the PV modules 1 takes place during the formation of the modular units and the modular units comprising the already assembled PV modules 1 are subsequently added to the respective rows be assembled and connected to the substructure.

Various modifications of this exemplary embodiment are conceivable and possible without departing from the scope of the invention as defined in the claims.

[0048] For example, it would be conceivable and possible to design the support feet 4 in one piece. There could then be a common floor bar that is removed in the middle area (relative to the direction perpendicular to the row direction). It would also then be possible to absorb thermal expansion through elastic bending of the fastening webs 16, 17. Elongated holes in the floor web could make it possible to adapt to building tolerances, albeit to a lesser extent.

The PV modules 1 could also be fastened in a different way than described.

To enable the mobility of the partial posts 3a, 3b in the row direction 2, instead of elastic bending of parts of the support feet 4 or in addition to this, it would also be conceivable and possible for the two support foot parts 4a, 4b or at least one of the support foot parts 4a, 4b in Row direction 2 is movably connected to the substructure. This could be achieved, for example, by the fact that the elongated holes in the floor webs 14, 15 are not clamped relative to the screws 18 but rather allow mobility relative to the screws 18. This could also be the case for only one of the support foot parts 4a, 4b.

[0051] Support feet, which have separate support foot parts, one of which is rigidly connected to the first part post 3a and the other to the second part post 3b and of which at least one is movable in the row direction, could also be designed differently than shown. For example, one of the support foot parts could be rigidly connected to the substructure and the other support foot part could be movably mounted on one support foot part in the row direction 2.

The attachment of the lower bars 7 to the fastening webs 16, 17 could also be done in a different way and the attachment of the fastening webs 16, 17 to the partial posts 3a, 3b could also be done in a different way.

The lower bars 7 could also be attached directly to the partial posts 3a, 3b above the fastening webs 16, 17.

[0054] The lower bars 7 could also be attached to the respective partial post in a way other than by means of fastening tabs 7a, 7b, so that the fastening tabs 7a, 7b could also be omitted.

The posts, support feet and bars (if present) can each consist entirely or partially of metal, preferably folded sheet metal, composite materials, processed extruded profiles, plastic or wood or combinations thereof.

The support structure shown in FIG. 10 is designed in the same way as the support structure shown in FIGS. 1 to 8. The only difference is in the substructure. Here this is only formed by plates, for example corrugated plastic plates 5, to which the support feet 4 are attached directly. For example, a separate plate can be provided for each support foot 4. The plates are again covered by a fill, not shown.

A second exemplary embodiment of the invention is shown in FIGS. 11 to 13. Apart from the differences described below, the design corresponds to that of the first exemplary embodiment and the description of the first exemplary embodiment and the modifications to it can be used analogously.

In contrast to the previously described exemplary embodiment, the mobility of the partial posts 3a, 3b parallel to the row direction 2 is made possible here by a connection with the respective support foot 24 that is movable parallel to this direction. The support feet 24 are preferably formed in one piece. They have a bottom web 25 and fastening webs 26, 27 projecting upwards from this. The fastening webs 26, 27 are aligned at right angles to the row direction 2 and taper towards the top. The lower ends of the partial posts 3a, 3b protrude into the space between the fastening webs 26, 27. Connecting bolts 28 run between the fastening webs 26, 27 and pass through holes in the partial posts 3a, 3b. The connecting bolts 28 are parallel to the row direction 2 and the partial posts 3a, 3b can be moved independently of one another relative to the connecting bolts 28 parallel to the row direction 2.

For example, the connecting bolts 28 can be designed as fitting shoulder screws as shown, i.e. a shaft of such a fitting shoulder screw is connected on one side by a bolt head and on the other side by a thread with a thinner diameter onto which a nut is screwed.

The mobility of the partial posts 3a, 3b parallel to the row direction is limited in one direction by the maximum telescoping ability of the partial posts 3a, 3b, and in the other direction when pulled further apart by abutment against the fastening webs 26, 27.

To additionally enable adaptation to assembly tolerances, the screws 18, with which the support feet 24 are connected to the substructure, can pass through elongated holes in the base web 25 that are aligned parallel to the row direction 2, whereby these elongated holes are similar in position and shape to the elongated holes 14a, 15a the floor webs 14, 15 of the first exemplary embodiment can correspond. Instead, round holes can also be provided.

Openings for the connecting bolts 28 arranged at different heights can be present in the fastening webs 26, 27 and/or in the partial posts 3a, 3b, which enables the posts 3 to be adjusted in height.

There are at least two connecting bolts 28 spaced apart in height.

The lower bars 7 lie above the fastening webs 26, 27 and are rigidly connected directly to the respective partial posts 3a, 3b. For fastening, the lower bars can in turn have protruding fastening tabs which are riveted to the respective partial post 3a, 3b. The attachment can also be done in another way, for example by screw connections.

The mobility of the partial posts 3a, 3b in the row direction 2 relative to the fastening webs 26, 27 could also be designed in a different way. For example, support feet could be provided with opposite fastening webs aligned parallel to the row direction, between which the lower ends of the respective partial posts 3a, 3b protrude, the partial posts 3a, 3b being guided by means of guide bolts in elongated holes extending parallel to the row direction 2.

The fastening webs could then be connected on opposite sides of the post 3 by connecting webs extending at right angles to the row direction in order to provide sufficient stability in this direction.

A further exemplary embodiment of the invention is shown in FIGS. 14 and 15. The differences from the first exemplary embodiment are explained below. Otherwise, the description of the first exemplary embodiment and the modifications described can be used in an analogous manner.

In this exemplary embodiment, the PV modules 29 have frames 30. The PV modules can be attached to the partial posts 3a, 3b directly to the vertical frame legs 30a, 30b, for example via rivets or screw connections. This means that the lower and upper bars 7, 8 can be omitted. The partial posts 3a, 3b then do not have to extend over the entire height of the PV modules.

The support feet 4 are shown in FIG. 15 to be designed in the same way as in the first exemplary embodiment (but without recesses 31). The support feet thus have first and second support foot parts 4a, 4b, the fastening webs 16, 17 of which are rigidly connected to the respective partial post 3a, 3b, for example by riveting, in a manner analogous to the first exemplary embodiment (the fastening tabs 7a, 7b of the lower bars 7 omitted).

[0070] A lower and/or upper horizontal bar could also be provided, to which the lower and/or upper horizontal frame leg 30c, 30d could possibly be additionally fastened.

[0071] The support feet 4 could also be designed in a different way, for example in a manner analogous to that shown in the second exemplary embodiment.

Legend

About the reference numbers

[0072] 1 PV module 2 row direction 3 post 3' post 3a first partial post 3b second partial post 4 support foot 4' support foot 4a support foot part 4b support foot part 5 corrugated plastic plate 6 rail 7 lower bar 7a fastening tab 7b fastening tab 8 upper bar 9 base web 10 base web 11 side legs 12 Side leg 13 space 14 bottom bar 14a long hole 15 bottom bar 15a long hole 16 first fastening bar 17 second fastening bar 18 screw 19 hole 20 hole 21 hole 22 holder 23 opening 24 support foot 25 floor bar 26 fastening bar 27 fastening bar 28 connecting bolt 29 PV module 30 frame 30a vertical Frame leg 30b vertical frame leg 30c horizontal frame leg 30d horizontal frame leg 31 recess

Claims (15)

1. Support structure for holding at least one row of vertically arranged PV modules (1, 29), comprising vertical posts (3, 3 ') spaced apart in the row direction (2), which are attached to support feet (4, 4'; 24). are, with which the support structure can be mounted on a substructure (5, 6), with a PV module (1, 29) directly attached to the post (3, 3 ') and / or between successive posts (3) in a row at least one horizontal bar (7, 8) running between the posts (3, 3 '), characterized in that at least the posts (3) lying between other posts (3) of the at least one row each have a first and a second partial post (3a, 3b), which have a mobility relative to one another parallel to the row direction (2), the PV module (29) lying on one side of this post (3) being fastenable to the first partial post (3a) and/or the at least a horizontal bar (7, 8) lying on one side of this post (3) is fastened and the PV module (29) lying on the other side of this post (3) can be fastened to the second partial post (3b) and/or the at least one horizontal bar (7, 8) lying on the other side of this post (3) is attached. 2. Supporting structure according to claim 1, characterized in that the two partial posts (3a, 3b) of a respective post (3) each have a base web (9, 10) and at the two ends of the base web (9, 10) from these in the direction of other partial posts (3a, 3b) have side legs (11, 12) protruding, the side legs (11, 12) of the two partial posts (3a, 3b) overlapping over sections adjoining the free ends of the side legs (11, 12). 3. Supporting structure according to claim 1 or 2, characterized in that at least those support feet (4, 24) to which the posts (3) lying between other posts (3) of the at least one row are attached are supported by at least one floor web (14, 15; 25) have upwardly projecting first and second fastening webs (16, 17; 26, 27), between which a lower end section of the respective post (3) projects. 4. Support structure according to claim 3, characterized in that the at least one floor web (14, 15; 25) has elongated holes (14a, 15a) which extend parallel to the row direction (2) and through which screws (18) for fastening to a Substructure (5, 6) can be carried out. 5. Supporting structure according to claim 3 or 4, characterized in that the fastening webs (16, 17; 26, 27) lie in planes perpendicular to the row direction (2). 6. Supporting structure according to one of claims 1 to 5, characterized in that the partial posts (3a, 3b) are movably connected to the support feet (24) to which they are attached, parallel to the row direction (2). 7. Supporting structure according to claim 5 and 6, characterized in that connecting bolts (28) run between the fastening webs (26, 27) and pass through holes in the partial posts (3a, 3b). 8. Supporting structure according to claim 3, characterized in that the first partial post (3a) is rigidly connected to the first fastening web (16) and the second partial post (3b) is rigidly connected to the second fastening web (17) and the fastening webs (16, 17) in the connection area with the partial posts (3a, 3b) have an elastic flexibility parallel to the row direction (2). 9. Supporting structure according to claim 8, characterized in that the at least one floor web (14, 15) is removed in a central region of the respective support foot (4) with respect to the direction perpendicular to the row direction (2), this region extending in both directions extends at right angles to the row direction (2) beyond the extents of the partial posts (3a, 3b) in this direction. 10. Supporting structure according to claim 8 or 9, characterized in that a respective support foot (4) has a first support foot part (4a) rigidly connected to the first partial post (3a) and a second support foot part (4b) rigidly connected to the second partial post (3b). has, wherein the support foot parts (4a, 4b) can be fastened to the substructure (6, 7) in different positions relative to the row direction (2). 11. Supporting structure according to one of claims 3 to 10, characterized in that at least one fastening point of the respective fastening web (16, 17), with which it is fastened to the respective partial post (3a, 3b), is provided, which is above a longitudinally extended base body of that lower horizontal bar (7), which is also attached to this partial post (3a, 3b). 12. Supporting structure according to one of claims 3 to 11, characterized in that the horizontal bars (7) running below the PV modules (1) have fastening tabs (7a, 7b) projecting upwards and downwards at their ends, each of which rest on the side of the respective fastening web (16, 17) facing away from the respective post (3) and are rigidly fixed relative to it. 13. PV system with at least one row of vertically arranged PV modules (1, 29) which are attached to a support structure according to one of claims 1 to 11. 14. PV system according to claim 13, characterized in that the supporting structure is attached to a substructure (5, 6). 15. PV system according to claim 14, characterized in that the substructure has plates, preferably corrugated plastic plates (5), which are covered by a fill.