CN114915240A - Photovoltaic power generation support system and installation method thereof - Google Patents
Photovoltaic power generation support system and installation method thereof Download PDFInfo
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- CN114915240A CN114915240A CN202210322854.6A CN202210322854A CN114915240A CN 114915240 A CN114915240 A CN 114915240A CN 202210322854 A CN202210322854 A CN 202210322854A CN 114915240 A CN114915240 A CN 114915240A
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- 238000010248 power generation Methods 0.000 title claims abstract description 52
- 238000009434 installation Methods 0.000 title claims description 36
- 238000000034 method Methods 0.000 title claims description 12
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 57
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 238000004873 anchoring Methods 0.000 claims description 10
- 239000011150 reinforced concrete Substances 0.000 claims description 6
- 238000007493 shaping process Methods 0.000 claims description 5
- 238000004364 calculation method Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 5
- 239000003381 stabilizer Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S20/00—Supporting structures for PV modules
- H02S20/10—Supporting structures directly fixed to the ground
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S30/00—Structural details of PV modules other than those related to light conversion
- H02S30/10—Frame structures
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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Abstract
The invention discloses a photovoltaic power generation support system which comprises a photovoltaic panel assembly and a flexible photovoltaic support, wherein the flexible photovoltaic support is used for bearing the photovoltaic panel assembly. The flexible photovoltaic support comprises at least one span, and each span comprises a shape-adjusting cable and a stabilizing cable. The shape adjusting cable is used for providing a reverse resultant force in a second direction opposite to the first direction when receiving a first acting force in the first direction so as to offset the first acting force, and the stabilizing cable is used for providing a reverse resultant force in the first direction when receiving a second acting force in the second direction so as to offset the second acting force.
Description
Technical Field
The invention relates to the technical field of photovoltaic power generation, in particular to a photovoltaic power generation support system and an installation method thereof.
Background
In recent years, photovoltaic power generation technology has been rapidly developed, which enables high-quality project land resources to be rapidly consumed. In order to meet the increasingly vigorous market demand and save the investment cost, the main development trend in the field of photovoltaic power generation is to build a centralized photovoltaic power station by utilizing the areas used for non-high-quality projects such as deserts, mountains and hills, intertidal zones, over-head pools and the like.
To accommodate such complex terrain and installation environments, large-span flexible photovoltaic mounts have gained increasing attention and application. The large-span flexible support system can fully utilize the space under the large-span flexible support system on one hand, and on the other hand, the large-span flexible support system is low in steel consumption and investment cost, so that the large-span flexible support system is a rapidly developing technology.
The load that photovoltaic module supporting structure bore mainly includes material dead weight, all directions's wind load and snow load to and earthquake load. The load is transmitted downwards layer by layer through the photovoltaic panel and the support, and the direction of the load can be downwards, upwards or form a certain angle with the horizontal direction. In order to better bear the load, the existing flexible support mostly adopts a single-layer cable structure system and a rigid frame/truss combination, and part of the flexible support is provided with a two-layer cable structure system so as to better bear the downward load.
Although the vertical gravity load and the snow load of subassembly can be born better to current flexible support, nevertheless relatively poor to the bearing capacity of burden wind pressure, and burden wind pressure often can arouse flexible support overall structure's apparent vibration, and then makes flexible support and photovoltaic board subassembly receive destruction under the exogenic action.
Disclosure of Invention
In view of some or all of the problems of the prior art, the present invention provides, in one aspect, a photovoltaic power generation mounting system, including:
a photovoltaic panel assembly; and
the flexible photovoltaic bracket is used for bearing the photovoltaic panel assembly and comprises at least one span, wherein each span comprises:
each door-shaped structure comprises an upright post and a cross beam, and the photovoltaic panel assembly is arranged between the two door-shaped frames;
two ends of the shape adjusting cable are respectively connected to the top ends of the upright columns of the two door-shaped structures, and the shape adjusting cable deviates downwards to form an arc-shaped structure; and
two ends of the stabilizing cable are respectively connected to the middle sections of the upright columns of the two door-shaped structures,
and the stabilizing cables are deviated upwards to form an arc-shaped structure.
Further, the photovoltaic panel assembly is arranged between the two door-shaped frames through mounting cables, and two ends of each mounting cable are connected to the cross beams of the two door-shaped frames respectively.
Further, the mounting cables comprise an upper mounting cable and a lower mounting cable, the mounting cables are arranged horizontally, and a height difference exists between the upper mounting cable and the lower mounting cable, so that an included angle gamma is formed between the photovoltaic panel assembly and the horizontal plane.
Furthermore, at least one first stress node is arranged on the shape adjusting cable, when the shape adjusting cable is installed, an included angle alpha of the shape adjusting cable at the first stress node is smaller than 180 degrees, and when external force is applied, two side cables of the included angle provide counter force;
the stabilizing cable is provided with at least one second stress node, an included angle beta of the stabilizing cable at the second stress node is smaller than 180 degrees during installation, and the second stress node is in one-to-one correspondence connection with the first stress node through a supporting truss; and
the upper mounting cable comprises at least one third stress node, the lower mounting cable comprises at least one fourth stress node, and the third stress node and the fourth stress node are connected with the first stress node in a one-to-one correspondence mode through a supporting truss.
Furthermore, at least one second stress node arranged in the middle section of the stabilizing cable is overlapped with the corresponding first stress node.
Furthermore, the main structure further comprises anchoring points which are arranged at two ends of the flexible photovoltaic support and connected with the portal frames at the two ends through anchoring diagonal draw bars.
Furthermore, the stabilizing cable of the flexible photovoltaic support is a whole, the direction of the stabilizing cable is adjusted through the cable guide device on the stand column to form an arc-shaped structure in one span, two ends of the stabilizing cable are connected to the top ends of the anchoring points, and an included angle theta is formed between two ends of the stabilizing cable and the horizontal plane.
Further, the included angle theta is determined by the total area Av of the photovoltaic panel assembly between two adjacent portal frames, the included angle gamma, the allowable stress [ sigma ] of the stabilizer cables, and the cross-sectional area As of the stabilizer cables.
Furthermore, the upright post is made of a precast tubular pile, or an I-shaped steel, or a square steel, or a round steel, or a cast-in-place reinforced concrete pile; and/or
The cross beam is made of reinforced concrete beams or I-shaped steel square bars.
Further, the total span of the photovoltaic power generation support system ranges from 10m to 500m, and the distance per span is from 5 m to 50 m.
In another aspect, the present invention provides a method for installing the photovoltaic power generation support system, comprising:
installing an upper installation cable and a lower installation cable according to the installation position obtained by calculation, and applying an initial pull force with a specified magnitude to enable the upper installation cable and the lower installation cable to be in a horizontal state;
installing a shape adjusting cable and a supporting truss;
mounting the photovoltaic panel assembly on the upper mounting cable and the lower mounting cable;
adjusting the tension of the shape adjusting cable until the upper deflection of the photovoltaic panel assembly reaches the preset deflection; and
and installing a stabilizing cable, and adjusting the tension of the stabilizing cable until the photovoltaic panel assembly is in a horizontal state.
According to the photovoltaic power generation support system and the installation method thereof, the shape adjusting cable for providing upward counter force and the stabilizing cable for providing downward counter force are arranged below the photovoltaic panel component to keep the stability of the structure under different incoming wind actions. Make photovoltaic power generation mounting system can resist vertical load such as dead weight and snow pressure, can resist positive wind pressure and negative-going wind pressure again, makes it can keep the horizontality in daily operation, can keep less deformation again when suffering too big wind load, has improved the horizontal stability of structure greatly, has reduced the component fatigue that too big vibration leads to.
Drawings
To further clarify the above and other advantages and features of embodiments of the present invention, a more particular description of embodiments of the present invention will be rendered by reference to the appended drawings. It is appreciated that these drawings depict only typical embodiments of the invention and are therefore not to be considered limiting of its scope. In the drawings, the same or corresponding parts will be denoted by the same or similar reference numerals for clarity.
Fig. 1 shows a schematic structural view of a prior art large span photovoltaic support;
FIG. 2 shows a schematic structural view of a photovoltaic power generation mounting system according to an embodiment of the present invention;
fig. 3 is a schematic diagram illustrating the force adjustment and transmission of a photovoltaic power generation support system under the action of downward load and positive wind according to an embodiment of the invention;
FIG. 4 is a schematic diagram illustrating the adjustment and transmission force of a photovoltaic power generation rack system under the action of negative wind according to an embodiment of the invention;
FIG. 5 illustrates a structural schematic of a support truss of a photovoltaic power generation racking system according to one embodiment of the present invention;
FIG. 6 is a schematic structural view of a cable guide of a photovoltaic power generation rack system according to an embodiment of the invention;
FIG. 7 is a schematic view of the mounting position of the mounting cables of a photovoltaic power generation mounting system according to one embodiment of the present invention; and
fig. 8 shows a flow chart of a method of installing a photovoltaic power generation rack system according to an embodiment of the invention.
Detailed Description
In the following description, the present invention is described with reference to examples. One skilled in the relevant art will recognize, however, that the embodiments may be practiced without one or more of the specific details, or with other alternative and/or additional methods, materials, or components. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of the invention. Similarly, for purposes of explanation, specific numbers, materials and configurations are set forth in order to provide a thorough understanding of the embodiments of the invention. However, the invention is not limited to these specific details. Further, it should be understood that the embodiments shown in the figures are illustrative representations and are not necessarily drawn to scale.
Reference in the specification to "one embodiment" or "the embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment.
It should be noted that the embodiment of the present invention describes the process steps in a specific order, however, this is only for the purpose of illustrating the specific embodiment, and does not limit the sequence of the steps. Rather, in various embodiments of the present invention, the order of the steps may be adjusted according to process adjustments.
In this application, the term "negative wind pressure" means that wind acts on the underside of the component to form an upward lifting force. In an embodiment of the present invention, the photovoltaic panel assembly extends in the east-west direction and faces south, and therefore, in the present application, the term "positive wind pressure" refers to a south-going wind, and the term "negative wind pressure" refers to a north-going wind.
Fig. 1 shows a schematic structural diagram of a large-span photovoltaic support in the prior art. As shown in fig. 1, the existing large-span photovoltaic support mainly includes a rigid frame 001, a mounting cable 002, a shaping cable 003, and an inter-cable support truss 004. The photovoltaic panel assembly is mounted on the mounting cable 002. Under the effect of accent shape cable 003, the large-span photovoltaic support can bear better photovoltaic board subassembly's vertical gravity load and snow load, nevertheless accent shape cable 003 can only bear the effect of pulling, and the ability of bearing the burden wind pressure can only rely on the pretension of installation cable 002 self, but, when great prestressing force has been applyed to the installation cable, can produce too big upwards amount of deflection, and then increase the pulling force of cable itself. In order to solve the problem, the resistance of the photovoltaic support to wind direction and wind pressure is enhanced, so that the obvious vibration of a cable structure system caused by wind load and wind pressure is avoided, and further the support, a photovoltaic plate assembly and other structures are prevented from being damaged under the action of external force. Specifically, the shape adjusting cable is used for providing a reverse resultant force in a second direction opposite to the first direction when receiving a first acting force in the first direction so as to counteract the first acting force; and the stabilizing cable is used for providing a resultant force in the opposite direction in the first direction when receiving a second acting force in the second direction so as to counteract the second acting force. In an embodiment of the invention, the first direction is a forward wind direction, which is also to be understood as a direction perpendicular to the downward direction of the photovoltaic panel assembly, and the second direction is a reverse wind direction, which is also to be understood as a direction perpendicular to the upward direction of the photovoltaic panel assembly.
The solution of the invention is further described below with reference to the accompanying drawings of embodiments.
Fig. 2 shows a schematic structural view of a photovoltaic power generation rack system according to an embodiment of the present invention. As shown in fig. 2, a photovoltaic power generation racking system includes a plurality of rows of photovoltaic panel assemblies 100 and a flexible photovoltaic rack. Wherein the photovoltaic panel assembly 100 is mounted on the flexible photovoltaic support and bears downward and upward loads through the shape-adjusting rope 300 and the stabilizing rope 400, respectively.
The flexible photovoltaic support extends east-west and is marked as a row. The flexible photovoltaic supports between different rows may be connected by trusses, as shown in fig. 5. The flexible photovoltaic support comprises at least two portal frames 201, and the photovoltaic panel assembly 100 is installed between two adjacent portal frames 201. In an embodiment of the present invention, the portal frame 201 is composed of two vertical columns and a cross beam, and can bear the loads of two adjacent span cable bodies, and the combined loads mainly form a vertical load and a horizontal load under the action of horizontal wind power. In one embodiment of the present invention, the vertical columns may be made of precast tubular piles, or i-shaped steel, or square steel, or round steel, or cast-in-place reinforced concrete pile columns, and the cross beams may be made of reinforced concrete beams or i-shaped steel square bars.
In one embodiment of the present invention, the photovoltaic panel assembly 100 is disposed between the two portal frames 201 through a mounting cable 500, and both ends of the mounting cable 500 are respectively connected to the cross beams of the two portal frames 201. To ensure that the photovoltaic panel assembly 100 can sufficiently receive sunlight, an included angle γ is usually formed between the photovoltaic panel assembly 100 and the horizontal plane, and for this reason, in one embodiment of the present invention, the mounting cables include an upper mounting cable and a lower mounting cable, the upper mounting cable and the lower mounting cable are both horizontally arranged, and a height difference exists between the upper mounting cable and the lower mounting cable. Specifically, for example, both ends of the lower mounting cable may be directly connected to the cross member, both ends of the upper mounting cable may be connected to a fixing structure protruding from the cross member, or the like.
Two adjacent door-shaped frames form a span, and the flexible photovoltaic support 200 comprises at least one span. In one embodiment of the present invention, the span of the photovoltaic power generation rack system is determined by the photovoltaic panel assembly string, and can adapt to the span from 10m to 1000m, and the length of each span included in the photovoltaic power generation rack system can be the same or different, wherein the length of each span, namely the distance between two adjacent portal frames, can be different from 5 m to 50m, and specifically can be determined according to the latitude and the topographic condition of the place where the photovoltaic power generation rack system is located. Furthermore, in a further embodiment of the invention, the distance between the photovoltaic panel assemblies of different rows, i.e. north and south, is also determined according to the latitude and the topographic conditions of the location of the photovoltaic power generation rack system.
The shape-adjusting cable 300 is used for providing upward return force, and under the action of the self weight of the photovoltaic power generation support system and forward wind, pulling force is generated on two sides of the shape-adjusting cable 300 so as to provide upward reverse resultant force at a node. As shown in FIG. 2, two ends of the shaping cable 300 are connected to the top ends of the pillars of two adjacent portal-shaped structures 201, respectively, and the shaping cable 300 is deviated downwards to form an arc-shaped structure. In an embodiment of the present invention, an anchor is further disposed at two ends of the shape-adjusting cable 300, so that the tension of the shape-adjusting cable can be adjusted by the expansion and contraction adjusting function of the anchor. In another embodiment of the present invention, at least one first force-bearing node 301 is disposed on the cable 300, and the distances between the first force-bearing nodes 301 may be equal or different.
The stabilizing cable 400 is used for providing a downward returning force, and when negative wind pressure is applied, tension is generated on two sides of the stabilizing cable 400 so as to provide a downward reverse resultant force at a node. As shown in FIG. 2, both ends of the stabilizer cable 400 are connected to the middle sections of the pillars of the adjacent two gate-shaped structures 201, respectively, and the stabilizer cable 400 is deviated upward to form an arc-shaped structure. In one embodiment of the present invention, both ends of the stabilizing cable 400 are connected to the cable guide on the upright, so that the stabilizing cable 400 is integrated in the whole photovoltaic power generation support system. Fig. 6 shows a schematic structural diagram of a cable guide device of a photovoltaic power generation support system according to an embodiment of the invention. As shown in fig. 6, the cable guide may shift the extending direction of the stabilizing cable 400. In an embodiment of the present invention, anchors are further provided at both ends of the stabilizing wire 400, so that the tension of the stabilizing wire can be adjusted by the telescopic adjustment function of the anchors. In another embodiment of the present invention, at least one second force-bearing node 401 is disposed on the stabilizer cable 400, and the second force-bearing nodes 401 correspond to the first force-bearing nodes 301 in a one-to-one vertical direction.
In one embodiment of the present invention, the stabilizing cable 400, the shaping cable 300 and the installation cable 500 are connected to each other by a support truss 304 and transmit load. Fig. 5 shows a schematic structural view of a support truss of a photovoltaic power generation rack system according to an embodiment of the invention. As shown in fig. 5, the support truss 304 is "Y" shaped. Two ends of the "|" part are connected to the second stressed node 401 and the corresponding first stressed node 301, respectively, so as to realize load transfer. Specifically, the included angle α of the shape-adjusting cable 300 at any first stress node 301 is smaller than 180 degrees, the dead weight of the photovoltaic power generation support system and the forward wind form a downward acting force, the downward acting force is transmitted downward through the supporting truss 304, at this time, the two sides of the shape-adjusting cable 300 generate pulling forces so as to provide an upward reverse resultant force at the first stress node 301, the included angle β of the stabilizing cable 400 at any second stress node 401 is smaller than 180 degrees, and when upward acting forces such as a negative wind pressure are received, the two sides of the stabilizing cable 400 generate pulling forces so as to provide a downward reverse resultant force at the second stress node 401. Fig. 3 and 4 show a force adjusting and transferring schematic diagram of a photovoltaic power generation support system according to an embodiment of the present invention when the photovoltaic power generation support system is under downward load and positive wind and when the photovoltaic power generation support system is under negative wind.
The "V" portion of the support truss 304 is connected to the upper and lower mounting cables, respectively. Specifically, a third force-receiving node 511 is further provided at a position of the upper mounting cable corresponding to the first force-receiving node, a fourth force-receiving node 521 is further provided at a position of the lower mounting cable corresponding to the first force-receiving node, and the top ends of the "V" portions of the support truss 304 are connected to the third force-receiving node 511 and the fourth force-receiving node 521, respectively. In order to prevent the photovoltaic panel assembly from generating horizontal displacement under the condition of self-weight flexible support, the horizontal force components of the support truss 304 at the third force-bearing node 511 and the fourth force-bearing point 521 need to be the same, that is, the installation positions of the upper installation cables and the lower installation cables need to satisfy certain conditions. Fig. 7 is a schematic view showing the installation position of the installation cable of the photovoltaic power generation support system according to one embodiment of the present invention. As shown in FIG. 7, when the "V" portion of the support truss 304 is symmetrical with respect to the "I" portion thereof, i.e., the "V" portion is symmetrical with respect to the "I" portion
The above conditions are satisfied, and at this time:
wherein ,
x 1 is the horizontal distance between the fourth force-bearing node and the corresponding first force-bearing node;
x 2 is the horizontal distance between the third force-bearing node and the corresponding first force-bearing node;
h is the vertical distance between the fourth stress node and the corresponding first stress node;
l is the distance between the fourth stress node and the corresponding third stress node; and
gamma is the included angle between the photovoltaic panel assembly and the horizontal plane.
In another embodiment of the present invention, the stabilizing cable and the shape-adjusting cable may share one cable at the midspan horizontal segment, that is, at least one second force-bearing node 401 disposed at the midspan of the stabilizing cable 400 coincides with the corresponding first force-bearing node 301.
In order to better withstand the load, in one embodiment of the invention, an anchor point 202 is also provided. The anchoring points 202 are arranged at two ends of the flexible photovoltaic support and are connected with the portal frames 201 at the two ends through the anchoring diagonal draw bars 221, so that the anchoring diagonal draw bars 221 can bear oblique loads, vertical loads such as dead weight and horizontal loads such as wind load. The anchor points may be, for example, posts, anchor piles, or the like that are completely or partially buried in the ground. In one embodiment of the invention, the stabilizing cable of the flexible photovoltaic bracket is a whole, the direction of the stabilizing cable is adjusted by a cable guide device on the upright post to form an arc-shaped structure in each span, two ends of the stabilizing cable are connected to the top ends of the anchoring points, and the included angle theta between the two ends of the stabilizing cable and the horizontal plane can be adjusted by the cable guide device. In one embodiment of the invention, the allowable stress [ sigma ] of the stabilizing rope can be determined according to the total area Av of the photovoltaic panel assembly between two adjacent door-shaped frames, the included angle gamma of the photovoltaic panel assembly and the horizontal plane]Cross-sectional area As of the stabilizing wire, air density ρ and statistical probability upper dictionaryType wind speed v 0 Determining the included angle theta:
fig. 8 shows a flow chart of a method of installing a photovoltaic power generation rack system according to an embodiment of the invention. As shown in fig. 8, a method for installing a photovoltaic power generation rack system includes:
first, at step 801, a stud is installed. Installing a door-shaped frame and a side span strut according to a preset span;
next, at step 802, the mounting cord is installed. According to the calculation method, the installation positions of the upper installation cable and the lower installation cable are determined and installed, then the initial tension with the specified magnitude is applied to enable the upper installation cable and the lower installation cable to be in a horizontal state, and the initial tension is 20-50KN generally;
next, at step 803, the profile ropes and the support truss are installed. Connecting the shape adjusting cable to the portal frame, and installing a support truss between the installation cable and a stress node of the shape adjusting cable;
next, at step 804, the photovoltaic panel assembly is installed. Mounting the photovoltaic panel assembly on the mounting cable, specifically, mounting the photovoltaic panel assembly on the upper mounting cable and the lower mounting cable, wherein a certain downwarping is generated;
next, at step 805, the profile cable is adjusted. Adjusting the tension of the shape adjusting cable until the upper deflection of the photovoltaic panel assembly reaches a preset deflection through the telescopic adjusting function of the anchorage devices at the two ends of the shape adjusting cable, so that the photovoltaic panel assembly is in a certain reverse arch upward deflection, wherein the value range of the preset deflection is 1/300-1/150; and
finally, at step 806, a stabilizing cable is installed. And installing a stabilizing cable, and adjusting the tension of the stabilizing cable through the telescopic adjustment function of the anchorage devices at the two ends of the stabilizing cable to enable the stabilizing cable to generate a certain downward tension until the photovoltaic panel assembly is in a horizontal state.
And finishing the installation of the photovoltaic power generation support system, wherein the installation cable, the shape-adjusting cable and the stabilizing cable all have pretension force. The cable is horizontal when no wind load acts, the shape-adjusting cable tension increases to resist the downward external force transmitted from the supporting truss when positive wind load acts, and the stable cable tension increases to resist the upward external force transmitted from the supporting truss when negative wind load acts.
The shape-adjusting cable and the stabilizing cable can be shared in a section of horizontal inhaul cable in the midspan, the shape-adjusting cable is in a high stress state when the inhaul cable has a positive wind pressure effect, and the stabilizing cable is in an initial tension state. When the action of the backward wind exists, the stable rope is in a high stress state, and the rest of the shape adjusting rope except the common section of the middle section is in a loose state. The middle section shares the inhaul cable system, namely the shape adjusting cable and the stabilizing cable can be reduced, the space under the plate is occupied, and more operation space can be provided under the plate for planting, breeding and other operations.
While various embodiments of the present invention have been described above, it should be understood that they have been presented by way of example only, and not limitation. It will be apparent to persons skilled in the relevant art that various combinations, modifications, and changes can be made thereto without departing from the spirit and scope of the invention. Thus, the breadth and scope of the present invention disclosed herein should not be limited by any of the above-described exemplary embodiments, but should be defined only in accordance with the following claims and their equivalents.
Claims (14)
1. A photovoltaic power generation mounting system, comprising:
a photovoltaic panel assembly; and
a flexible photovoltaic mount configured to carry the photovoltaic panel assembly, the flexible photovoltaic mount comprising at least one span, wherein each span comprises:
a cable configured to provide a resultant opposing force in a second direction opposite the first direction to counteract the first force when subjected to the first force in the first direction; and
and the stabilizing cable is configured to provide a resultant force in the opposite direction in the first direction when receiving a second acting force in the second direction so as to counteract the second acting force.
2. The photovoltaic power generation mounting system of claim 1, wherein each bay further comprises:
the photovoltaic panel assembly comprises two door-shaped frames, wherein each door-shaped frame comprises an upright post and a cross beam, and the photovoltaic panel assembly is arranged between the two door-shaped frames.
3. The photovoltaic power generation mounting system of claim 2, wherein:
two ends of the shape adjusting cable are respectively connected to the top ends of the upright columns of the two portal frames, and the shape adjusting cable deviates downwards to form an arc-shaped structure; and
and two ends of the stabilizing cable are respectively connected to the middle sections of the upright columns of the two portal frames, and the stabilizing cable is deviated upwards to form an arc-shaped structure.
4. The photovoltaic power generation mounting system of claim 1, wherein the photovoltaic panel assembly is disposed between the two portal frames by a mounting cable, both ends of the mounting cable being connected to the cross beams of the two portal frames, respectively.
5. The photovoltaic power generation mounting system of claim 1, wherein the mounting cables comprise an upper mounting cable and a lower mounting cable, the mounting cables are arranged horizontally, and a height difference exists between the upper mounting cable and the lower mounting cable, so that an included angle γ is formed between the photovoltaic panel assembly and the horizontal plane.
6. The photovoltaic power generation support system of claim 5, wherein the shape-adjusting cable is provided with at least one first stress node, an included angle of the shape-adjusting cable at the first stress node is less than 180 degrees during installation, and two cables of the included angle provide counter force when external force is applied;
the stabilizing cable is provided with at least one second stress node, the included angle of the stabilizing cable at the second stress node is less than 180 degrees during installation, and the second stress node is in one-to-one correspondence connection with the first stress node through a supporting truss; and
the upper mounting cable comprises at least one third stress node, the lower mounting cable comprises at least one fourth stress node, and the third stress node and the fourth stress node are connected with the first stress node in a one-to-one correspondence mode through a supporting truss.
7. The photovoltaic power generation mounting system of claim 6, wherein at least one second force-bearing node disposed at the midsection of the stabilizing cable coincides with a corresponding first force-bearing node.
8. The photovoltaic power generation mounting system of claim 6, wherein the mounting positions of the shaping cables and the upper and lower mounting cables are as follows:
wherein ,
x 1 is the horizontal distance between the fourth force-bearing node and the corresponding first force-bearing node;
x 2 the horizontal distance between the third stress node and the corresponding first stress node;
h is the vertical distance between the fourth stress node and the corresponding first stress node;
l is the distance between the fourth stress node and the corresponding third stress node; and
gamma is the included angle between the photovoltaic panel assembly and the horizontal plane.
9. The photovoltaic power generation mounting system of claim 1, wherein the flexible photovoltaic support further comprises side span anchoring points disposed at both ends of the flexible photovoltaic support and connected to the gate frames at both ends through anchoring diagonal draw bars.
10. The photovoltaic power generation support system according to claim 9, wherein the stabilizing cable of the flexible photovoltaic support is a whole body, the direction of the stabilizing cable is adjusted by a cable guide device on the upright post to form an arc-shaped structure in each span, two ends of the stabilizing cable are connected to the top ends of the anchoring points, and an included angle θ is formed between the two ends of the stabilizing cable and the horizontal plane.
11. The photovoltaic power generation mounting system of claim 10, wherein the angle θ is determined by the total area of the photovoltaic panel assembly Av between two adjacent portal frames, the angle γ of the photovoltaic panel assembly to the horizontal, the allowable stress [ σ ] of the stabilizing cord, the cross-sectional area As of the stabilizing cord:
where ρ is the air density and v is 0 Is a statistically probable typical wind speed.
12. The photovoltaic power generation support system of claim 1, wherein the vertical columns are made of precast tubular piles, or i-shaped steel, or square steel, or round steel, or cast-in-place reinforced concrete pile columns; and/or
The cross beam is made of reinforced concrete beams or I-shaped steel square bars.
13. The photovoltaic power generation mounting system of claim 1, wherein the total span of the photovoltaic power generation mounting system ranges from 10m to 1000m, and the distance per span varies from 5 to 50 m.
14. A method of installing a photovoltaic power generation mounting system, comprising:
installing an upper installation cable and a lower installation cable according to the installation position obtained by calculation, and applying an initial pull force with a specified magnitude to enable the upper installation cable and the lower installation cable to be in a horizontal state;
installing a shape adjusting cable and a supporting truss;
installing a photovoltaic panel assembly on the upper installation cable and the lower installation cable, and adjusting the tension of the shape adjusting cable until the upper deflection of the photovoltaic panel assembly reaches a preset value; and
and installing a stabilizing cable, and adjusting the tension of the stabilizing cable until the photovoltaic panel assembly is in a horizontal state.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311266679.4A CN117277927A (en) | 2022-03-30 | 2022-03-30 | Photovoltaic power generation support system and installation method thereof |
| CN202210322854.6A CN114915240B (en) | 2022-03-30 | 2022-03-30 | Photovoltaic power generation support system and installation method thereof |
| PCT/CN2023/081568 WO2023185470A1 (en) | 2022-03-30 | 2023-03-15 | Photovoltaic power generation support system and installation method thereof |
Applications Claiming Priority (1)
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| CN202210322854.6A CN114915240B (en) | 2022-03-30 | 2022-03-30 | Photovoltaic power generation support system and installation method thereof |
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| CN202311266679.4A Division CN117277927A (en) | 2022-03-30 | 2022-03-30 | Photovoltaic power generation support system and installation method thereof |
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| CN114915240A true CN114915240A (en) | 2022-08-16 |
| CN114915240B CN114915240B (en) | 2023-08-08 |
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| CN202311266679.4A Pending CN117277927A (en) | 2022-03-30 | 2022-03-30 | Photovoltaic power generation support system and installation method thereof |
| CN202210322854.6A Active CN114915240B (en) | 2022-03-30 | 2022-03-30 | Photovoltaic power generation support system and installation method thereof |
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| CN202311266679.4A Pending CN117277927A (en) | 2022-03-30 | 2022-03-30 | Photovoltaic power generation support system and installation method thereof |
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| WO (1) | WO2023185470A1 (en) |
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| CN116780986A (en) * | 2023-05-06 | 2023-09-19 | 中国水电顾问集团贵阳勘测设计研究院岩土工程有限公司 | Large-span prestress double-layer cable net structure photovoltaic bracket and mounting method thereof |
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| CN117439542B (en) * | 2023-10-23 | 2024-04-16 | 珠海华成电力设计院股份有限公司 | High-bearing large-span photovoltaic flexible support structure |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2023185470A1 (en) | 2023-10-05 |
| CN114915240B (en) | 2023-08-08 |
| CN117277927A (en) | 2023-12-22 |
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