CN110323998A - A kind of pretension solid flexible cable structure photovoltaic bracket module and system - Google Patents

Abstract

The invention discloses a pre-tensioned three-dimensional flexible cable structure photovoltaic support module and system, belonging to the technical field of photovoltaic power generation, including a first column group, a second column group, a main cable and a pre-tensioned sub-cable, and two column groups Each includes at least three main cable suspension points with different heights. The heights of the main cable suspension points on both sides correspond one by one. The main cables are respectively fixed between the suspension points on both sides. Connected to the photovoltaic module, the main cable is distributed around the photovoltaic module. Each photovoltaic module is kept stable under the action of at least three outward tensions exerted by the pre-tensioned sub-cables, and avoids swaying and rollover under strong wind conditions.

Description

A pre-tensioned three-dimensional flexible cable structure photovoltaic support module and system

technical field

The invention relates to the technical field of photovoltaic power generation, in particular to a pretensioned three-dimensional flexible cable structure photovoltaic support module and system.

Background technique

There are still obvious defects in the traditional photovoltaic support structure and structural system: First, it occupies a large area, and when encountering water or terrain that is not suitable for building ground photovoltaics, piling or floating structures are required, which is difficult and expensive to construct; The second is that the simple suspension-type photovoltaic support structure has poor wind resistance and low stability, and the span cannot be made very large, and the terrain adaptability is poor.

The pre-tensioned three-dimensional flexible cable structure photovoltaic support system proposed by the present invention forms a support system with a certain rigidity by forming prestressed tension between the load-bearing main cables, and is used for laying photovoltaic modules; pre-tensioning in three or more directions makes the support The system has good stability; through reasonable tension angle design, the flexible cable structure is prevented from covering the photovoltaic modules and affecting the power generation efficiency. It is suitable for places where conventional photovoltaic brackets cannot be installed, such as barren hills, fish ponds, waterworks, sewage treatment plants, etc.

Contents of the invention

The purpose of the present invention is to solve the problems in the above-mentioned background technology, so as to improve the stability of the photovoltaic support structure.

In order to achieve the above object, the present invention adopts a pre-tensioned three-dimensional flexible cable structure photovoltaic support module, including: the first column group, the second column group, the main cable and the pre-tensioned sub-cables arranged oppositely, and the two column groups include at least There are three main cable suspension points with different heights, and the heights on both sides correspond one by one. The main cable is fixed between the main cable suspension points with corresponding heights on both sides. One end of the pretensioned sub-cable is fixed on the main cable, and the other end is connected to the On the photovoltaic module, the main cables are distributed around the periphery of the photovoltaic module.

Further, at least one stay cable is arranged between the column body and the ground.

Further, the photovoltaic module and the pretensioned sub-cables are connected through connecting fittings. There are mounting holes reserved on the body of the photovoltaic module, and two positioning holes and a fixing hole are opened on the connecting fittings. The mounting holes on the components are connected through bolts, and a fixing hole is connected with the pretensioned sub-cables through bolts.

Further, the pretensioned sub-cables are arranged in parallel and equidistant between the main cables and the photovoltaic module, and the maximum sag of the main cables is Among them, L is the span, D is the distance between the pretensioned sub-cables, F1 is the pretensioned force, _F is the _lowest point horizontal tension of the main cable, and f is the sag of the main cable; the sag of the main cable and the corresponding pretensioned sub-cable The pretension planes are formed in the same plane, and the number of the pretension planes is the same as the number of the main cables.

Further, when there are three main cables, the angle between the pretension plane and the horizontal plane complies with the following relationship:

α<β ₁ ≤(90+α)

(90+α)＜β ₂ ≤(180+α)

(180+α)<β ₃ ≤(360+α)

Among them, α is the optimal inclination angle of the photovoltaic module, β ₁ , β ₂ , and β ₃ are the angles between the pretension plane and the horizontal plane where the main cable sags f ₁ , f ₂ , and f ₃ are respectively.

Further, when there are three main cables, each column group includes three main cable suspension points with different heights, and the coordinate relationship is:

x _F =f ₂ ×cosβ ₂ ; y _F =h+f ₂ ×sinβ ₂

x _E ＝x _F +M×cosα; y _E ＝y _F +M×sinα

x _A =x _E +f ₁ ×cosβ ₁ ; y _A =y _E +f ₁ ×sinβ ₁

x _C ＝x _F +f ₃ ×cosβ ₃ +M×cosα÷2; y _C ＝y _F +f ₃ ×sinβ ₃ +M×sinα÷2

Among them, α is the optimal inclination angle of the photovoltaic module, M is the length of the photovoltaic module; the maximum sags of the three main cables are f ₁ , f ₂ , f ₃ respectively, and the angles between the three pretension planes and the horizontal plane are β ₁ and β ₂ respectively , β ₃ , A, B, and C represent the three main cable suspension points on each side column group, E, F are the upper and lower hanging points of the photovoltaic module, and the corresponding coordinates of A, B, C, E, and F are respectively ( x _A ,y _A ),(x _B ,y _B ),(x _C ,y _C ),(x _E ,y _E ),(x _F ,y _F ), let the coordinates of point B be (0, h).

Further, when there are four main cables, the angle between the pretension plane and the horizontal plane complies with the following relationship:

α<β ₁ ≤(90+α)

(90+α)＜β ₂ ≤(180+α)

(180+α)<β ₃ ≤(270+α)

(270+α)<β ₃ ≤(360+α)

Among them, α is the optimal inclination angle of photovoltaic modules, β ₁ , β ₂ , β ₃ , and β ₄ are the angles between the pretension plane and the horizontal plane where the main cable sags f ₁ , f ₂ , f ₃ , and f ₄ are respectively.

Further, when there are four main cables, each column group includes four main cable suspension points with different heights, and the coordinate relationship is:

Among them, α is the optimal inclination angle of the photovoltaic module, M is the length of the photovoltaic module; the maximum sags of the four main cables are f ₁ , f ₂ , f ₃ , f ₄ respectively, and the angles between the three pretension planes and the horizontal plane are β ₁ , β ₂ , β ₃ , β ₄ , A, B, C, D represent the four main cable suspension points on each side column group, E, F are the upper and lower hanging points of photovoltaic modules, A, B, C, The coordinates of D, E, and F are respectively (x _A ,y _A ),(x _B ,y _B ),(x _C ,y _C ),(x _D ,y _D ),(x _E ,y _E ),(x _F ,y _F ), let the coordinates of point B be (0, h).

Further, the planes where the main cables and the pretensioned sub-cables are located intersect with the light-facing surface of the photovoltaic module, and the light-facing surface of the photovoltaic module is low in the south and high in the north.

On the other hand, a pre-tensioned three-dimensional flexible cable structure photovoltaic support system is adopted, which includes a plurality of the above-mentioned pre-tensioned three-dimensional flexible cable structure photovoltaic support modules, and the minimum distance between adjacent modules is: (y _A1 -y _F1 )×tan (α+Δα)+M×cosα, where α is the optimal inclination angle of the photovoltaic module, Δα is the variation range of the illumination angle in different seasons, M is the length of the photovoltaic module, y _A1 is the height of A in module 1, and y _F1 is the height of module 1 The height of the hanging point F of the photovoltaic module.

Compared with the prior art, the present invention has the following technical effects: In this scheme, column groups are respectively arranged on opposite sides of the bottom surface, and there are at least three main cable suspension points with different heights on the column groups, and the heights of the suspension points on both sides correspond one by one. ; At least three main cables are used, correspondingly connected between the main cable suspension points with the same height on both sides; the photovoltaic module and the main cable are connected through pre-tensioned sub-cables, and the main cables are distributed around the photovoltaic module. Each photovoltaic module remains stable under the action of more than three outward tensions exerted by pre-tensioned cables; the height of each photovoltaic module is the same, and the horizontal inclination is the same, and together form a photovoltaic module with a fixed inclination angle to the horizontal plane, so that the photovoltaic module The light-facing surface is not blocked under any working conditions, and at the same time, each main cable forms a stable three-dimensional structure under the inward tension of the pre-tensioned sub-cables to avoid rollover.

Description of drawings

Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail:

Figure 1 is a structural schematic diagram of a pre-tensioned three-dimensional flexible cable structure photovoltaic support module in the case of three main cables;

Fig. 2 is a structural schematic diagram of a pre-tensioned three-dimensional flexible cable structure photovoltaic support module in the case of four main cables;

Figure 3 is a schematic diagram of the assembly of photovoltaic modules and connecting fittings;

Figure 4 is an overall schematic diagram of the connection between the photovoltaic module and the pretensioned sub-cable;

Fig. 5 is the assembly schematic diagram of column and main cable;

Figure 6 is a schematic diagram of the main cable sag, pretensioned sub-cables and their stress relationship in the pretension plane;

Fig. 7 is a schematic diagram of the angle relation of the pretension plane;

Fig. 8 is a schematic diagram of the orientation of the column and the hanging point of the main cable;

Fig. 9 is a schematic diagram of the force comparison between the photovoltaic support of this embodiment and the photovoltaic support of the prior art;

Fig. 10 is a simplified structural schematic diagram of a photovoltaic support;

Fig. 11 is a schematic diagram of the spacing between adjacent pre-tensioned three-dimensional flexible cable structure photovoltaic support modules.

Detailed ways

In order to further illustrate the features of the present invention, please refer to the following detailed description and accompanying drawings of the present invention. The accompanying drawings are for reference and description only, and are not intended to limit the protection scope of the present invention.

It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may be present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for purposes of illustration only and are not intended to represent exclusive embodiments. The terminology used herein in the description of the invention is for the purpose of describing specific embodiments only, and is not intended to limit the present invention.

As shown in Figures 1-2, this embodiment discloses a pre-tensioned three-dimensional flexible cable structure photovoltaic support, including: the main cable and the pre-tensioned sub-cable 5 and the first column group 7, the second Column group 7, and two column groups all comprise at least three main cable suspension points of height, and the height of the suspension points on both sides corresponds one by one, and the main cable is respectively fixed between the suspension points of the corresponding heights on both sides, and one end of the pretensioned sub-cable 5 It is fixed on the main cable, and the other end is connected to the photovoltaic module 6 , and the main cable is distributed on the periphery of the photovoltaic module 6 .

Among them, the columns in the column group are provided with main cable suspension points at least three heights, and the main cables are distributed around the photovoltaic module. Similarly, the photovoltaic module is connected between the pretensioned sub-cables and the main cable. The photovoltaic module is subjected to at least three outward tensions applied by the pre-tensioned sub-cables, and each main cable is subjected to the inward tension applied by the pre-tensioned sub-cables to form a stable The three-dimensional structure can maintain excellent stability under the action of external force in any direction. And under the effect of tension, the heights of the photovoltaic modules are the same, and the horizontal inclination angles are the same, and they together form a photovoltaic module with a fixed inclination angle to the horizontal plane facing the light.

It should be noted that the number of pretensioned sub-cables 5 is determined by the span of the support system and the spacing of the pre-tensioned sub-cables. The spacing of the pre-tensioned sub-cables can be the width of the photovoltaic module. , each main cable and its supporting set of pretensioned sub-cables are in the same plane, and this plane is taken as the pretensioned plane. Under tension, each pretension plane intersects with the light-facing surface of the photovoltaic module, and the line formed by the intersection of any two pre-tension planes passes along the line on the light-facing surface of the photovoltaic module, or passes along the line below the light-facing surface of the photovoltaic module, or Parallel to the line/bottom line on the light-facing surface of the photovoltaic module.

Further, at least one stay cable 8 is arranged between the column body of the column 7 and the ground, and the tension is balanced through the stay cable 8 to maintain the stability of the whole support.

Further, as shown in Figure 3-4, the photovoltaic module 6 and the pretensioned sub-cable 5 are connected through the connecting fitting 9, the frame of the photovoltaic module 6 is reserved with mounting holes, and the connecting fitting is provided with two positioning holes and a fixing Two positioning holes are connected with the installation holes on two adjacent photovoltaic modules through bolts, and a fixing hole is connected with the pretensioned sub-cables through bolts. Among them, the photovoltaic modules are connected through connecting fittings, and the pretensioned sub-cables are connected to the fixed holes reserved on the connecting fittings.

Further, as shown in FIG. 5 , the uprights are provided with corresponding connecting pieces, and the main cables are connected with the uprights through the connecting pieces.

Preferably, as shown in Figure 3, the lengths of the pretensioned sub-cables in this embodiment are different, and the pre-tensioned sub-cables are arranged at equal intervals on the main cable, and must be suitable for the sag of the main cable in the horizontal plane, such as As shown in Figure 6, the maximum sag f of the main cable is:

Among them, L is the span, D is the distance between the pretensioned sub-cables, F1 is the pretension, and _F is the _lowest horizontal tension of the main cable.

Specifically, the main cable sag and the corresponding pretensioned sub-cables are in the same plane, referred to as "pretensioned plane", and the number of pretensioned planes is consistent with the number of main cables.

Further, as shown in Figures 7-8, the photovoltaic module in this embodiment presents a layout with a low south and a high north. Four main cables are used, namely, the main cable 1, the main cable 2, the main cable 3 and the main cable. The main cable 4, from the side view in Fig. 1, the angles of the pretension planes conform to the following relationship:

α<β ₁ ≤(90+α)

(90+α)＜β ₂ ≤(180+α)

(180+α)<β ₃ ≤(270+α)

(270+α)<β ₃ ≤(360+α)

Among them, α is the optimal inclination angle of photovoltaic modules, β ₁ , β ₂ , β ₃ , and β ₄ are the angles between the pretension plane and the horizontal plane where the main cable sags f ₁ , f ₂ , f ₃ , and f ₄ are respectively, and β ₁ , β ₂ , β ₃ , and β ₄ are preferably close to (45+α), (135+α), (225+α), (315+α).

When three main cables are used, the angles of each pretension plane viewed from the side view in Figure 2 conform to the following relationship:

α<β ₁ ≤(90+α)

(90+α)＜β ₂ ≤(180+α)

(180+α)<β ₃ ≤(360+α)

Among them, α is the optimal inclination angle of photovoltaic modules, β ₁ , β ₂ , β ₃ are the angles between the pretension plane and the horizontal plane where the main cable sags f ₁ , f ₂ , and f ₃ are respectively, and β ₁ , β ₂ , β ₃ , preferably close to (45+α), (135+α), (270+α).

Furthermore, given the angle between the pretension plane and the reference direction and the sag of the main cable, assuming the height of a certain suspension point, the relative positions of other suspension points can be determined:

(1) When there are 3 main cables, each column group includes 3 suspension points with different heights, and the coordinate relationship is:

x _F =f ₂ ×cosβ ₂ ; y _F =h+f ₂ ×sinβ ₂

x _E ＝x _F +M×cosα; y _E ＝y _F +M×sinα

x _A =x _E +f ₁ ×cosβ ₁ ; y _A =y _E +f ₁ ×sinβ ₁

x _C ＝x _F +f ₃ ×cosβ ₃ +M×cosα÷2; y _C ＝y _F +f ₃ ×sinβ ₃ +M×sinα÷2

Among them, α is the optimal inclination angle of the photovoltaic module, M is the length of the photovoltaic module; the maximum sags of the three main cables are f ₁ , f ₂ , f ₃ respectively, and the angles between the three pretension planes and the horizontal plane are β ₁ and β ₂ respectively , β ₃ , A, B, and C represent the three main cable suspension points on each side column group, E, F are the upper and lower hanging points of the photovoltaic module, and the corresponding coordinates of A, B, C, E, and F are respectively ( x _A ,y _A ),(x _B ,y _B ),(x _C ,y _C ),(x _E ,y _E ),(x _F ,y _F ), let the coordinates of point B be (0, h).

(2) When there are 4 main cables, each column group includes 4 suspension points with different heights, and the coordinate relationship is:

Among them, α is the optimal inclination angle of the photovoltaic module, M is the length of the photovoltaic module; the maximum sags of the four main cables are f ₁ , f ₂ , f ₃ , f ₄ respectively, and the angles between the three pretension planes and the horizontal plane are β ₁ , β ₂ , β ₃ , β ₄ , A, B, C, D represent the four main cable suspension points on each side column group, E, F are the upper and lower hanging points of photovoltaic modules, A, B, C, The coordinates of D, E, and F are respectively (x _A ,y _A ),(x _B ,y _B ),(x _C ,y _C ),(x _D ,y _D ),(x _E ,y _E ),(x _F ,y _F ), let the coordinates of point B be (0, h).

As shown in Figure 9, the stress situation of the photovoltaic module in this scheme is analyzed below to compare the stability of this photovoltaic support with that of the prior art photovoltaic support:

(1) When four main cables are used, the photovoltaic module is subjected to the outward tension F ₁ , F ₂ , F ₃ , and F ₄ of the four pretensioned sub-cables, and at the same time is subjected to the vertical gravity F ₅ and the horizontal wind force F ₆ function; assume that the horizontal inclination angle of the photovoltaic module is α. The mechanical relationship is as follows (to simplify the analysis, it is assumed that the F ₁ and F ₃ forces are in the vertical direction, and the F ₂ and F ₄ forces are in the horizontal direction).

(1-1) When F ₅ and F ₆ are not included, that is, F ₅ =F ₆ =0; the pretension in 4 directions conforms to the following formula:

F _1pre =F _3pre , F _2pre =F _4pre , F _1pre /F _2pre =tanα

(1-2) When F ₅ and F ₆ are applied, or external forces in other directions are decomposed into F ₅ and F ₆ :

F ₁ = F ₁ + F ₅ /2; F ₂ = F ₂ - F ₆ /2; F ₃ = F ₃ - F ₅ /2; F ₄ = F ₄ + F ₆ /2

(1-3) Check that F ₁ , F ₂ , F ₃ , and F ₄ are all greater than 0 under various working conditions, and a certain margin is left to ensure the stability of the pretensioned structure.

(2) When three main cables are used, the photovoltaic module is subjected to the outward tension F ₁ , F ₂ , and F ₃ of the three pre-tensioned sub-cables, and at the same time is subjected to the vertical gravity F ₅ and the horizontal wind F ₆ ; Assume that the horizontal inclination angle of the photovoltaic module is α. In order to simplify the analysis, assuming that the F ₃ direction is perpendicular to the light-facing surface of the photovoltaic module and has a mutual difference of 120 degrees with F ₁ and F ₂ , the mechanical relationship is as follows:

(2-1) When F ₅ and F ₆ are not included, that is, F ₅ =F ₆ =0, the pretension in three directions conforms to the following formula:

F _{1 pre} = F _{2 pre} = F _{3 pre}

(2-2) After being subjected to external forces such as F ₅ and F ₆ , decompose them along the direction of F ₃ and its vertical direction into component forces in two directions of F _method and F _cut .

F ₃ =F _{3 pre-} F _method /2

(2-3) Check that F ₁ , F ₂ , and F ₃ are all greater than 0 under various working conditions, and leave a certain margin to ensure the stability of the pretension structure.

Analysis shows that the photovoltaic module of this solution in Figure 9 forms a stable three-dimensional structure under the outward tension of the pre-tensioned cables, and can maintain excellent stability under the action of external force in any direction to avoid rollover. The two comparison structures in Figure 9 are more sensitive to lateral external force and have poor stability.

As shown in Figure 10, in some application scenarios, the structure of 3 main cables can also be simplified into a structure of 2 main cables. The basic principle is to rely on the gravity of the photovoltaic module itself to replace the pretension of the main cable 3. However, this structure is less stable under the action of lateral wind, and has a greater loss of stability compared with the structures in Figure 1 and Figure 2. Therefore, it is not recommended as a structure, but only as one of the structures that can be used in special scenarios.

As shown in Figure 11, this embodiment discloses a pre-tensioned three-dimensional flexible cable structure photovoltaic support system, which includes a plurality of support modules disclosed in the above embodiments, and the minimum distance between adjacent modules is: (y _A1 -y _F1 ) ×tan(α+Δα)+M×cosα, where α is the optimal inclination angle of the photovoltaic module, Δα is the variation range of the illumination angle in different seasons, M is the length of the photovoltaic module, y _A1 is the height of A in module 1, and y _F1 is the module The height of the lower hanging point F of a middle photovoltaic module.

It should be noted that, in this embodiment, considering the influence of the range of illumination angle variation in different seasons on photovoltaic modules, the range of illumination angle variation is set to Δα; in order to avoid mutual shading between modules and affect the power generation effect, the distance between adjacent photovoltaic support components is controlled below the above minimum distance.

It should be noted that the minimum distance between adjacent photovoltaic supports may be smaller than x _D , which means that the second module column B2 and the first module column D1 may cross and overlap.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within range.

Claims (9)

1. a kind of pretension solid flexible cable structure photovoltaic bracket module characterized by comprising the first column being oppositely arranged Group, the second column group, main rope and the sub- rope of pretension, and two column groups include the different main rope hitch point of at least three height, Two sides main rope hangs point height and corresponds, and is respectively fixed with main rope, one end of the sub- rope of pretension between the main rope hitch point of two sides Be fixed on main rope, the other end is connected on photovoltaic module, main rope be distributed in photovoltaic module periphery.

2. pretension solid flexible cable structure photovoltaic bracket module as described in claim 1, which is characterized in that the column cylinder At least one suspension cable is set between ground.

3. pretension solid flexible cable structure photovoltaic bracket module as described in claim 1, which is characterized in that the photovoltaic module It is connected with the sub- rope of the pretension through connection gold utensil, mounting hole is reserved on photovoltaic module ontology, offers two in connection gold utensil Location hole and a fixation hole, two location holes are cooperatively connected with the mounting hole on adjacent two photovoltaic module through bolt, a fixation hole with The sub- rope of pretension is through being bolted.

4. pretension solid flexible cable structure photovoltaic bracket module as described in claim 1, which is characterized in that pretension It Suo Pinghang and is equally spaced between main rope and photovoltaic module, the arc sag of the main rope isWherein L is Span, D are the sub- rope spacing of pretension, F₁For pretension, F_{It is low}For main rope minimum point Horizontal Tension, f is main rope arc sag；The main rope Arc sag is in same plane with the sub- rope of corresponding pretension and constitutes pretension plane, pretension plane quantity and the main rope number It measures identical.

5. pretension solid flexible cable structure photovoltaic bracket module as claimed in claim 4, which is characterized in that be in the main rope At 3, the angle of the pretension plane and horizontal plane meets following relationship:

α < β₁≤(90+α)

(90+ α) < β₂≤(180+α)

(180+ α) < β₃≤(360+α)

Wherein, α is photovoltaic module optimum angle of incidence, β₁, β₂, β₃Respectively main rope arc sag f₁、f₂、f₃Place pretension plane and level The angle in face.

6. pretension solid flexible cable structure photovoltaic bracket module as claimed in claim 4, which is characterized in that be in the main rope At 3, each column group includes the different main rope hitch point of 3 height, coordinate relationship are as follows:

x_F=f₂×cosβ₂；y_F=h+f₂×sinβ₂

x_E=x_F+M×cosα；y_E=y_F+M×sinα

x_A=x_E+f₁×cosβ₁；y_A=y_E+f₁×sinβ₁

x_C=x_F+f₃×cosβ₃+M×cosα÷2；y_C=y_F+f₃×sinβ₃+M×sinα÷2

Wherein, α is photovoltaic module optimum angle of incidence, and M is photovoltaic module length, and 3 main rope maximum arc sags are respectively f₁、f₂、f₃, 3 Pretension plane angle with horizontal plane is respectively β₁、β₂、β₃, A, B, C indicate 3 main rope hitch points in every heel post group, and E, F are Hanging point and lower hanging point on photovoltaic module, A, B, C, E, F respective coordinates are respectively (x_A,y_A),(x_B,y_B),(x_C,y_C),(x_E,y_E), (x_F,y_F), enabling B point coordinate is (0, h).

7. pretension solid flexible cable structure photovoltaic bracket module as claimed in claim 4, which is characterized in that be in the main rope At 4, the angle of the pretension plane and horizontal plane meets following relationship:

α < β₁≤(90+α)

(90+ α) < β₂≤(180+α)

(180+ α) < β₃≤(270+α)

(270+ α) < β₃≤(360+α)

Wherein, α is photovoltaic module optimum angle of incidence, β₁, β₂, β₃, β₄Respectively main rope arc sag f₁、f₂、f₃、f₄Place pretension plane With the angle of horizontal plane.

8. pretension solid flexible cable structure photovoltaic bracket module as claimed in claim 4, feature is in being 4 in the main rope When, each column group includes the different main rope hitch point of 4 height, coordinate relationship are as follows:

Wherein, α is photovoltaic module optimum angle of incidence, and M is photovoltaic module length；4 main rope maximum arc sags are respectively f₁、f₂、f₃、f₄, 3 A pretension plane angle with horizontal plane is respectively β₁、β₂、β₃、β₄, A, B, C, D indicate 4 main rope suspensions in every heel post group Point, E, F are hanging point and lower hanging point on photovoltaic module, and A, B, C, D, E, F coordinate are respectively (x_A,y_A),(x_B,y_B),(x_C,y_C), (x_D,y_D),(x_E,y_E),(x_F,y_F), enabling B point coordinate is (0, h).

9. a kind of pretension solid flexible cable structure photovoltaic bracket system, which is characterized in that including multiple as claim 1-8 is any Pretension solid flexible cable structure photovoltaic bracket module described in, the minimum range between adjacent block are as follows: (y_A1-y_F1)×tan(α + Δ α)+M × cos α, wherein α is photovoltaic module optimum angle of incidence, and Δ α is Various Seasonal lighting angle variation range, and M is photovoltaic group Part length, y_A1For the height of A in module one, y_F1For the height of hanging point F under photovoltaic module in module one.