CN106301162B - Two across cant beam optimization placement method of fixed type photovoltaic stent - Google Patents
Two across cant beam optimization placement method of fixed type photovoltaic stent Download PDFInfo
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- CN106301162B CN106301162B CN201610801118.3A CN201610801118A CN106301162B CN 106301162 B CN106301162 B CN 106301162B CN 201610801118 A CN201610801118 A CN 201610801118A CN 106301162 B CN106301162 B CN 106301162B
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000005457 optimization Methods 0.000 title claims abstract description 10
- 238000013461 design Methods 0.000 abstract description 5
- 229910000831 Steel Inorganic materials 0.000 abstract description 3
- 239000010959 steel Substances 0.000 abstract description 3
- 239000004744 fabric Substances 0.000 description 15
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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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
-
- 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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- 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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- Roof Covering Using Slabs Or Stiff Sheets (AREA)
Abstract
The invention discloses a kind of two across cant beam optimization placement method of fixed type photovoltaic stent, step are as follows：Obtain the photovoltaic panel length (L) and width (B), and first purlin is to the distance l of corresponding photovoltaic panel outermost end3；Determine cant beam length Lb, Lb=2 (L l3), calculate l3/LbNumerical value；According to l3/LbNumerical value, tables look-up and obtains l1/LbAnd l2/LbNumerical value, wherein l1It is the forward and backward distance for being hinged to the corresponding one end end of the cant beam, the l below the cant beam2It is the distance of forward and backward second purlin for being hinged to corresponding side below the cant beam；According to the l checked in1/LbAnd l2/LbDetermine l1And l2.The present invention makes moment of flexure in cant beam minimum, so as to reach the optimized design in cant beam section, reduces steel using amount, reduce cost by adjusting cant beam support position and cant beam cantilever span.
Description
Technical field
The present invention relates to technical field of photovoltaic power generation, more particularly to a kind of two across cant beam preferred arrangement of fixed type photovoltaic stent
Method.
Background technology
Photovoltaic generation is the hot spot for carrying out generation of electricity by new energy this year, and by the end of the end of the year 2015, China adds up photovoltaic plant installation
Capacity 43GW, wherein newly-increased 15GW in 2015, growth rate is up to 40%.China's photovoltaic gross generation in 2015 for 3.92 ×
1010Kwh, accounts for the 0.7% of national gross generation, and in recent years, because the reason such as haze, China supports development energetically in policy
Therefore new energy, photovoltaic generation also get most of the attention, it is contemplated that photovoltaic generation total installation of generating capacity is reached up to 63GW to the year two thousand twenty within 2016
150GW。
As the supporting structure of photovoltaic electrification component, photovoltaic bracket generally can according to the inclination angle of photovoltaic panel whether daily with
Solar variability is divided into two kinds：Fixing bracket and tracking stent.Photovoltaic module on fixing bracket is not daily with the height of the sun
And it is changed；And track photovoltaic assembly angle on stent and adjusted daily with the height of the sun to obtain more sun
Energy.It is, in general, that tracking stent can obtain the generated energy of higher, but construction cost and maintenance cost higher；And fixed branch
Although the frame efficiency of light energy utilization is relatively lower, supporting structure is simple, and cost is low, and installation and maintenance are more convenient, are China's mesh
Preceding widely used rack form, wherein, its schematic diagram such as Fig. 1 institute the most extensive with optimum angle of incidence fixed type photovoltaic stent applications
Show.
Common optimum angle of incidence fixed bracket has single column support and double column supports, and Fig. 2 and Fig. 3 give both
The side view of photovoltaic bracket, cant beam all can be approximately two continuous across band overhanging with column and support for bearing in two kinds of stents
Beam, the bearing spacing and cantilever span of cant beam are very big to Moment Influence in cant beam, and moment of flexure is control cant beam section in cant beam
Main internal force factor.
But at present in the design, cant beam bearing (i.e. upright bar and support) position and cantilever span are determined with larger
Randomness, moment of flexure causes to waste, preferably passes through analysis and determine cant beam support position and overhanging length there are excessive situation in cant beam
Degree, makes moment of flexure in cant beam reach minimum, section is optimal.
The content of the invention
In view of the drawbacks described above of the prior art, the present invention provides a kind of two across cant beam preferred arrangement of fixed type photovoltaic stent
Method, the first purpose of realization is by adjusting cant beam support position and cant beam cantilever span, makes moment of flexure in cant beam minimum, so that
Reach the purpose of the optimized design in cant beam section.
To achieve the above object, the present invention provides a kind of two across cant beam optimization placement method of fixed type photovoltaic stent, institute
State and 2 pieces of photovoltaic panels are equipped with above cant beam, the photovoltaic panel length direction is parallel with the cant beam length direction, from the cant beam two
End is inwardly symmetrical arranged the first purlin and the second purlin successively, the cant beam nationality by first purlin and second purlin with
The photovoltaic panel connection, is connected to first purlin and the second purlin below every piece of photovoltaic panel on the photovoltaic panel
Center is mutually symmetrical with, and the cant beam middle position below is hinged equipped with middle part, the hinged both sides difference of the cant beam lower middle part
Be symmetrical arranged it is forward and backward hinged, it is described forward and backward hinged between first purlin and second purlin of corresponding side.
Common photovoltaic panel is generally rectangular slab, and length and width are respectively L and B, are known quantity.Photovoltaic panel fabric swatch on stent
Mode has two kinds, and wherein photovoltaic panel long side (L) is arranged and (is commonly called as " vertical setting of types fabric swatch ") along cant beam, generally arranges 2 pieces of photovoltaic panels, by
Corresponding photovoltaic panel is symmetrically connected in first purlin and second purlin in the following, photovoltaic panel long side is from described first
Purlin and second purlin are chosen, and it is l to choose length3, l3Generally between 0.1m~0.5m.
For vertical setting of types fabric swatch, the method for arranging step is as follows：
A, the photovoltaic panel length L is obtained, and first purlin is to the distance l of corresponding photovoltaic panel outermost end3；
B, cant beam length L is determinedb, Lb=2 (L-l3), calculate l3/LbNumerical value；
C, according to l3/LbNumerical value, tables look-up and obtains l1/LbAnd l2/LbNumerical value,
Wherein l1It is the forward and backward distance for being hinged to the corresponding one end end of the cant beam below the cant beam,
The l2It is the distance of forward and backward second purlin for being hinged to corresponding side below the cant beam；
D, according to the l checked in1/LbAnd l2/Lb, l is calculated with following equation1And l2Value,
For vertical setting of types fabric swatch, different l can be determined by calculating3/LbOptimal l under numerical value1/LbAnd l2/LbValue, its
The results are shown in table.In application, work as l3/LbAfter given, l can be determined by tabling look-up1/Lb、l2/LbAnd at this time in cant beam
Moment M (M=Fl1, F is that purlin transmits concentrated force), which is l3/LbMinimum moment in cant beam after given.
A kind of two across cant beam optimization placement method of fixed type photovoltaic stent, is equipped with 4 pieces of photovoltaic panels above the cant beam, described
Photovoltaic panel width is parallel with the cant beam length direction, and the length of the cant beam is equal to the sum of 4 pieces of photovoltaic panel width, institute
Cant beam is stated equipped with 5 width of the distance between the uniformly distributed purlin, every two blocks of purlins with the photovoltaic panel along its length
Spend identical, the first purlin and the second purlin are symmetrical arranged successively from the cant beam inward at both ends in the purlin, in the cant beam
Meta installs Intermediate purlin, and the cant beam nationality is by first purlin, second purlin, the Intermediate purlin and the light
Plate connection is lied prostrate, the cant beam middle position below is hinged equipped with middle part, and the hinged both sides of the cant beam lower middle part are respectively symmetrically
Set it is forward and backward hinged, it is described forward and backward hinged between first purlin and second purlin of corresponding side.
Common photovoltaic panel is generally rectangular slab, and length and width are respectively L and B, are known quantity.Photovoltaic panel fabric swatch on stent
Mode has two kinds, and wherein photovoltaic panel short side (B) is arranged and (is commonly called as " horizontally-arranged fabric swatch ") along cant beam, purlin arrangement align with edges of boards so as to
Connected in photovoltaic panel with purlin, photovoltaic panel is without overhanging at this time.
For horizontally-arranged fabric swatch, the method for arranging step is as follows：
A, the photovoltaic panel width B is obtained, obtains the second purlin to the distance l of the Intermediate purlin3=B；
B, cant beam length L is determinedb, Lb=4B, obtains l3/Lb=0.25；
C, analysis, l are passed through1/LbAnd l2/LbNumerical value be preferably taken as respectively：l1/Lb=0.0976, l2/Lb=0.1524.
Wherein l1It is the forward and backward distance for being hinged to the corresponding one end end of the cant beam below the cant beam,
The l2It is the distance of forward and backward second purlin for being hinged to corresponding side below the cant beam；
D, the l provided according to previous step1/LbAnd l2/Lb, l is calculated with following equation1And l2Value,
For horizontally-arranged fabric swatch, l3/Lb=0.25, at this time corresponding optimal placement be：l1/Lb=0.0976 and l2/Lb=
0.1524, i.e. l1=0.3904B, l2=0.6096B, l3=B.
The present invention is exactly to apply said structure, by adjusting cant beam support position and overhanging segment length, is made curved in cant beam
Square reaches minimum, so as to reduce cant beam sectional dimension, reduces steel using amount, reduces cost.
Preferably, it is described it is forward and backward it is hinged connect column support respectively, the distance between two described column supports d=
2cosα(l2+l3), wherein α is the angle of inclination of the cant beam.
Preferably, first purlin to corresponding photovoltaic panel outermost end distance l3No more than 0.5m.
Preferably, in the step C, when in table without corresponding l3/LbDuring value, linear interpolation is used using adjacent values
Method determines l1/LbAnd l2/Lb。
Beneficial effects of the present invention：
The present invention makes moment of flexure in cant beam minimum, so as to reach oblique by adjusting cant beam support position and cant beam cantilever span
The optimized design of beam section, reduces steel using amount, reduces cost.
It is described further below with reference to the technique effect of design of the attached drawing to the present invention, concrete structure and generation, with
It is fully understood from the purpose of the present invention, feature and effect.
Brief description of the drawings
Fig. 1 is illustrated that the overall structure diagram of the present invention.
Fig. 2 is illustrated that view of the preferred arrangement cant beam of the present invention in single column support structure.
Fig. 3 is illustrated that view of the preferred arrangement cant beam of the present invention in double column support structures.
Fig. 4 is illustrated that a kind of structure diagram of vertical setting of types fabric swatch embodiment of the present invention.
Fig. 5 is illustrated that a kind of structure diagram of horizontally-arranged fabric swatch embodiment of the present invention.
Embodiment
In embodiment specific implementation is provided exemplified by cant beam bearing arrangement when vertical setting of types fabric swatch and horizontally-arranged fabric swatch respectively
Method：For stent using double column supports, photovoltaic panel length and width are respectively 2m × 1m, photovoltaic panel cantilever span l3=0.27m, photovoltaic panel
Inclination alpha=30 °.
Embodiment 1：
As shown in Figures 2 to 4, the present invention is directed to vertical setting of types fabric swatch, and the cant beam 3 is equipped with two pieces of photovoltaic panels 1, the light above
It is parallel with 3 length direction of cant beam to lie prostrate 1 length direction of plate, the first purlin 2 is symmetrical arranged successively from 3 inward at both ends of cant beam
With the second purlin 2 ', 3 nationality of cant beam is connected by first purlin 2 and second purlin 2 ' with the photovoltaic panel 1, connection
First purlin, 2 and second purlin 2 ' below every piece of photovoltaic panel 1 is mutually symmetrical with 1 center of photovoltaic panel,
3 middle position below of cant beam is equipped with middle part hinged 4, and the both sides of 3 lower middle part of cant beam hinged 4 are symmetrically arranged
Forward and backward hinged 5,5 ', described forward and backward hinged 5,5 ' positioned at first purlins 2 of corresponding side and second purlin 2 ' it
Between.
The first step：Vertical setting of types fabric swatch, the distance of the first purlin to corresponding photovoltaic panel outermost end：Cantilever span l3=0.27m, light
Lie prostrate the long L=2m of plate；
Second step：Determine cant beam length Lb
Cant beam length is Lb=2 (L-l3)=3.46
3rd step：According to l3/LbDetermine l1/LbAnd l2/Lb
l3/Lb=0.078, table look-up, no respective value, given value is respectively l in table3/Lb=0.07143 and l3/Lb=
0.08824, l is determined using linear interpolation method respectively1/LbAnd l2/Lb：
l1/Lb=0.03717+ (0.04288-0.03717) (0.078-0.07143)/(0.08824-0.07143)=
0.0394
l2/Lb=0.5-l1/Lb-l3/Lb=0.3826
That is l1=0.0394Lb=136mm, l2=0.38264Lb=1.324mm
4th step：Determine front and rear column spacing
Column spacing d=2cos α (l before and after double column supports2+l3)=2cos30 (1.324+0.27)=2.76m, it is front and rear
Column midpoint is located on same vertical curve with cant beam midpoint.
Table
| l1/Lb | l2/Lb | l3/Lb | M |
| 0.00821 | 0.47897 | 0.01282 | Fl1 |
| 0.01613 | 0.45755 | 0.02632 | Fl1 |
| 0.02368 | 0.43578 | 0.04054 | Fl1 |
| 0.03072 | 0.41372 | 0.05556 | Fl1 |
| 0.03717 | 0.39140 | 0.07143 | Fl1 |
| 0.04288 | 0.36888 | 0.08824 | Fl1 |
| 0.04778 | 0.34616 | 0.10606 | Fl1 |
| 0.05172 | 0.32328 | 0.125 | Fl1 |
| 0.05461 | 0.30023 | 0.14516 | Fl1 |
| 0.05633 | 0.27700 | 0.16667 | Fl1 |
| 0.05685 | 0.25350 | 0.18966 | Fl1 |
| 0.05606 | 0.22966 | 0.21429 | Fl1 |
| 0.05292 | 0.19708 | 0.25 | Fl1 |
Embodiment 2：
As shown in Fig. 2, Fig. 3, Fig. 5, the present invention is directed to horizontally-arranged fabric swatch, and the cant beam 3 is equipped with four pieces of photovoltaic panels 1, institute above
It is parallel with 3 length direction of cant beam to state 1 width of photovoltaic panel, and the length of the cant beam 3 is equal to 4 pieces of 1 width of photovoltaic panel
The sum of, the cant beam 3 of stating is equipped with 5 blocks of the distance between uniformly distributed purlin, every two blocks of purlins and light along its length
Being of same size for volt plate 1, the first purlin 2 and the second purlin are symmetrical arranged in the purlin successively from 3 inward at both ends of cant beam
2 ', 3 centre position of cant beam sets Intermediate purlin 2 ", 3 nationality of cant beam by first purlin 2, second purlin 2 ',
The Intermediate purlin 2 " is connected with the photovoltaic panel 1, and 3 middle position below of cant beam is equipped with middle part hinged 4, the cant beam 3
The both sides of lower middle part hinged 4 are symmetrically arranged forward and backward hinged 5,5 ', described forward and backward hinged 5,5 ' positioned at corresponding side
Between first purlin 2 and second purlin 2 '.
4 pieces of photovoltaic panels are arranged for vertical setting of types, are optimized cant beam support position and are determined relatively simple, photovoltaic panel width B=1m, this
When Fig. 4 in optimum size be respectively：
l1=0.3904B=0.39m, l2=0.6096B=0.61m, l3=B=1m
Front and rear column spacing d=2cos α (l2+l3)=2cos30 ° (0.61+1)=2.79m
Preferred embodiment of the invention described in detail above.It should be appreciated that those of ordinary skill in the art without
Need creative work to conceive according to the present invention and make many modifications and variations.Therefore, all technologies in the art
Personnel are available by logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Technical solution, all should be in the protection domain being defined in the patent claims.
Claims (5)
1. a kind of two across cant beam optimization placement method of fixed type photovoltaic stent, it is characterised in that two pieces are equipped with above the cant beam
Photovoltaic panel, the photovoltaic panel length direction is parallel with the cant beam length direction, is symmetrically set successively from the cant beam inward at both ends
The first purlin and the second purlin are put, the cant beam nationality is connected by first purlin and second purlin with the photovoltaic panel,
First purlin and the second purlin being connected to below every piece of photovoltaic panel are mutually symmetrical with the photovoltaic panel center, institute
State cant beam middle position below to be hinged equipped with middle part, the hinged both sides of the cant beam lower middle part are symmetrically arranged forward and backward hinge
Connect, described forward and backward hinged between first purlin and second purlin of corresponding side, the method for arranging step
It is as follows：
A, the photovoltaic panel length L is obtained, and first purlin is to the distance of corresponding photovoltaic panel outermost end, cantilever span l3；
B, cant beam length L is determinedb, Lb=2 (L-l3), calculate l3/LbNumerical value；
C, according to l3/LbNumerical value, tables look-up and obtains l1/LbAnd l2/LbNumerical value,
Wherein l1It is the forward and backward distance for being hinged to the corresponding one end end of the cant beam, the l below the cant beam2It is described
The distance of forward and backward second purlin for being hinged to corresponding side below cant beam；
D, according to the l checked in1/LbAnd l2/Lb, l is calculated with following equation1And l2Value,
A kind of 2. two across cant beam optimization placement method of fixed type photovoltaic stent according to claim 1, it is characterised in that institute
The first purlin is stated to the distance l of corresponding photovoltaic panel outermost end3No more than 0.5m.
A kind of 3. two across cant beam optimization placement method of fixed type photovoltaic stent according to claim 1, it is characterised in that institute
State in step C, when in table without corresponding l3/LbDuring value, l is determined using linear interpolation method using adjacent values1/LbAnd l2/
Lb。
4. a kind of two across cant beam optimization placement method of fixed type photovoltaic stent, it is characterised in that four pieces are equipped with above the cant beam
Photovoltaic panel, the photovoltaic panel width is parallel with the cant beam length direction, and the length of the cant beam is equal to 4 pieces of photovoltaic panels
The sum of width, the cant beam are equipped with the distance between 5 uniformly distributed purlins along its length, every two blocks of purlins and the light
Being of same size for volt plate, the first purlin and the second purlin, institute are symmetrical arranged in the purlin successively from the cant beam inward at both ends
State cant beam centre position and Intermediate purlin is set, the cant beam nationality is by first purlin, second purlin, the Intermediate purlin
It is connected with the photovoltaic panel, the cant beam middle position below is hinged equipped with middle part, the hinged both sides of the cant beam lower middle part
Be symmetrically arranged it is forward and backward hinged, it is described it is forward and backward it is hinged positioned at first purlin of corresponding side and second purlin it
Between, the method for arranging step is as follows：
A, the photovoltaic panel width B, the distance l of second purlin to the Intermediate purlin are obtained3=B；
B, cant beam length L is determinedb, Lb=4B, that is, have：l3/Lb=0.25；
C, analysis, l are passed through1/LbAnd l2/LbNumerical value be preferably taken as respectively：l1/Lb=0.0976, l2/Lb=0.1524；
Wherein l1It is the forward and backward distance for being hinged to the corresponding one end end of the cant beam, the l below the cant beam2It is described
The distance of forward and backward second purlin for being hinged to corresponding side below cant beam；
D, the l provided according to upper step1/LbAnd l2/Lb, l is calculated with following equation1And l2Value,
5. two across the cant beam optimization placement method of a kind of fixed type photovoltaic stent according to claim 1 or 4, its feature exist
In, it is described it is forward and backward it is hinged connect column support respectively, the distance between two described column supports d=2cos α (l2+l3), its
Middle α is the angle of inclination of the cant beam.
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| CN112713847A (en) * | 2020-12-28 | 2021-04-27 | 苏州腾晖光伏技术有限公司 | High-reliability large-size double-sided component support system |
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| US20130098427A1 (en) * | 2011-10-25 | 2013-04-25 | Frank Bretl | Paraboloid reflectors |
| CN202948944U (en) * | 2012-11-22 | 2013-05-22 | 杭州帷盛太阳能科技有限公司 | Large span photovoltaic truss structure |
| CN203055930U (en) * | 2012-12-22 | 2013-07-10 | 合肥聚能新能源科技有限公司 | Photovoltaic support system used in assemblies with multiple specifications and satisfying requirements for optimum inclination angles |
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