Installation method of soft photovoltaic module

Abstract

The invention discloses an installation method of a soft photovoltaic module, relates to the technical field of photovoltaic module installation, and aims to solve the technical problems that various aspects of the prior art are not strict enough and the construction efficiency and quality are low. Roof cleaning; paying off and positioning; applying a structural adhesive; pasting the assembly; installing an assembly string and an inverter; and grid-connected construction is carried out. According to the installation method, the steps are clear, the process is standard, from equipment checking to grid-connected construction, each link has clear operation requirements, for example, a cleaning agent with a specific proportion is adopted for roof cleaning, impurities can be rapidly and effectively removed, and a good foundation is provided for subsequent installation; strict time and operation specifications during assembly pasting ensure the construction efficiency and reduce rework caused by misoperation. Compared with a traditional installation method, the construction period is greatly shortened, the overall installation efficiency is improved, and the labor cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic assembly installation, and more particularly to a method for installing a flexible photovoltaic assembly. Background Art

[0002] Vigorously expanding the application of distributed photovoltaics not only helps protect the ecological environment but also contributes to achieving green and low-carbon development. Compared to traditional glass modules, lightweight, flexible photovoltaic modules are 70% lighter, effectively reducing the bearing pressure on roof surfaces. The product boasts exceptional application advantages. Its "light," "thin," "flexible," "beautiful," and "flexible" properties have been widely recognized in the market, further expanding the application scenarios of distributed power stations.

[0003] However, when installing soft photovoltaic modules, the existing technology lacks systematic planning in the construction process, and the links are loosely connected. For example, if the equipment inventory is not detailed and not strictly checked according to the list and drawings, it is easy to cause discrepancies in the number and specifications of equipment, which are difficult to detect in time. In the roof cleaning process, there is no clear cleaning agent ratio and operating specifications, and the base layer is not cleaned thoroughly. Residual debris and oil stains affect the subsequent gluing and module pasting, resulting in weak bonding and increased rework. When pasting the components, the time control is arbitrary, and the installation is carried out only after the structural adhesive is cured, which seriously affects the bonding performance. In addition, the operating techniques are not standardized, and single-person handling can easily cause the components to deform. The installation position is arbitrary, and secondary pasting often occurs. These all seriously affect construction efficiency and quality, resulting in an extension of the construction period and a significant increase in labor costs. In view of this, we propose a method for installing soft photovoltaic modules. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings of the existing technology, adapt to actual needs, and provide a method for installing a flexible photovoltaic module to solve the technical problems that the current technology is not rigorous in all aspects and has low construction efficiency and quality.

[0005] To solve the above technical problems, the present invention provides the following technical solution: a method for installing a flexible photovoltaic module, comprising the following steps:

[0006] S1: Equipment inventory and inspection;

[0007] S2: Roof cleaning;

[0008] S3: line laying and positioning;

[0009] S4: Apply structural adhesive;

[0010] S5: Component pasting;

[0011] S6: Component string and inverter installation;

[0012] S7: Grid connection construction.

[0013] Preferably, the step S1 checks the quantity and specification on the delivery list, packing list and drawing, and checks whether the component equipment is damaged during the process of leaving factory and transportation.

[0014] Preferably, the step S2 cleans the roof base by cleaning agent, which is prepared by 1 / 4 cup of trisodium phosphate, 1 / 2 cup of liquid cleaning agent and 5 gallons of water, to remove sundries on the roof base, and the cleaned base surface is clean, dry, free of dust, oil and particles.

[0015] Preferably, the step S3 determines the position of each column of light and soft photovoltaic module on the roof according to the design drawing, and performs measurement and line laying.

[0016] Preferably, the step S4 uniformly applies structural adhesive on the wave peak plane of the color steel tile, with a width of 6-10 mm, a height of 3-5 mm and a length of 1040 mm, and the interval is not greater than 500 mm, i.e. one wave peak interval.

[0017] Preferably, the step S5 installs the light and soft photovoltaic module within 5 minutes after applying the structural adhesive to prevent the curing of the silicone from affecting the bonding performance, and the module is not allowed to be excessively twisted during installation, and two persons need to hold the white edge of the module and slowly put it into the glued area, and the module is pasted horizontally and vertically, and it is not allowed to be pasted twice, and the bonding part cannot be torn or peeled off within 24 hours after construction.

[0018] Preferably, the step S5 prohibits pressing the battery piece with hands after pasting the module, and uses the edge roller to compact the non-battery piece area of the module, and uses the plastic roller to roll on the surface of the module to ensure that the module is well bonded with the roof, and the pasted surface needs to be flat without concave or convex, and the adjacent modules share the flat aluminum strip.

[0019] Preferably, the step S5 has a structural adhesive height of not less than 3 mm after pasting, and it is prohibited to use feet or other non-designated tools to compact the structural adhesive, and the junction box is placed on the side of the maintenance passage to facilitate the string wiring and maintenance inspection, and other modules are installed according to the above steps, and the horizontal distance between the modules is 350 mm.

[0020] Preferably, the step S6 installs the inverter according to the following main process: device unpacking inspection, inverter installation, inverter cable connection, secondary circuit wiring inspection, inverter test adjustment and power supply operation acceptance, and the electrical connection is not allowed to be performed until at least 4 hours after the module installation, and the electrical connection is performed at weak light in the morning and evening, and 16 flexible modules are selected as one string, and 4 mm 2 photovoltaic DC cable is used for DC cable, and each string of DC cable is connected to the inverter after being connected to the electrical groove box.

[0021] Preferably, the power generated by the photovoltaic unit in the step S7 is incorporated into the power grid, the roof photovoltaic assembly is output through an inverter, a 0.4kV / 10kV step-up transformer is used to output to 10kV, and then T is connected to a 10kV special line, and the original metering of the special line and the public network T is replaced with bidirectional metering.

[0022] Compared with the prior art, the present application has the following advantages:

[0023] 1、The installation method of the present application has clear steps and standardized processes, from equipment inspection to grid connection construction, each link has clear operation requirements, such as using a specific ratio of cleaning agent for roof cleaning to quickly and effectively remove debris and provide a good foundation for subsequent installation; strict time and operation specifications during component pasting ensure construction efficiency and reduce rework caused by improper operation. Compared with the traditional installation method, the present application greatly shortens the construction period, improves the overall installation efficiency, and reduces the labor cost.

[0024] 2、The present application is stable and reliable in operation: by strictly controlling the quality of each installation step, the stability and reliability of the photovoltaic module after installation are ensured, the precise gluing requirement of the structural adhesive ensures the close connection between the module and the roof; the detailed process of inverter installation and the strict requirement of electrical connection ensure the stability of power conversion and transmission, and the comprehensive quality acceptance requirement covers many aspects such as the base layer, the pasting surface and electrical connection. The present application can effectively avoid potential hazards, ensure long-term stable operation of the photovoltaic system, improve power generation efficiency and prolong service life. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 The present application is a flowchart. DETAILED DESCRIPTION

[0026] Example 1, as shown in the present application relates to a kind of soft photovoltaic module installation method, including the following steps: Figure 1

[0027] S1: equipment inspection.

[0028] The step S1 is checked according to the quantity, specification on the delivery list, packing list and drawing, and whether the component equipment is damaged during manufacturing and transportation is checked.

[0029] The delivery list records various information of the supplied equipment in detail, the packing list clearly shows the specific items contained in each packaging box, and the drawing accurately marks the specification parameters of each component.

[0030] ​The appearance inspection is mainly to check whether there are obvious scratches, dents, cracks and other damage marks on the shell of the component device. For components with connection parts, check whether the connection parts are loose or deformed. Functional testing requires the use of professional testing instruments such as multimeters, insulation resistance testers, etc. to detect whether the electrical performance of the component meets the standard requirements. For example, use a multimeter to measure the open-circuit voltage, short-circuit current and other parameters of the component, and compare them with the standard values in the product manual to determine whether they are normal.

[0031] S2: Roof cleaning.

[0032] In step S2, the roof base is cleaned with a cleaning agent composed of 1 / 4 cup of trisodium phosphate, 1 / 2 cup of liquid cleaner, and 5 gallons of water. This removes debris from the roof base, leaving the surface clean, dry, and free of dust, oil, and particles.

[0033] Take 1 / 4 cup of trisodium phosphate and 1 / 2 cup of liquid cleaner, and slowly pour them into 5 gallons of water while stirring thoroughly with a stirring tool such as a stirring rod to ensure uniform mixing of all ingredients.

[0034] Use a soft-bristled brush or sponge mop to dip into the prepared cleaning agent and evenly apply it to the roof base. Wipe from top to bottom and left to right to ensure that every part of the base surface is cleaned. For stubborn stains, you can increase the number of wipes or soaking time, but be careful not to over-wipe and damage the roof base.

[0035] After cleaning, rinse the roof base with clean water to remove any remaining cleaning agent and debris. After rinsing, allow the base to air dry or use a clean towel to dry it, ensuring that the surface is dry, free of dust, oil, and particles.

[0036] S3: Positioning with a line.

[0037] In step S3, according to the design drawings, determine the position of each column of light and soft photovoltaic components on the roof and measure the line.

[0038] Prepare high-precision measuring tools such as laser range finders, theodolites, and ink pots. Laser range finders are used to accurately measure distances, theodolites are used to determine angles, and ink pots are used to mark lines.

[0039] According to the design drawings, first determine the reference line of the roof, generally select the edge of the roof or the existing building structure line as the reference. Then, use the laser range finder and the theodolite to determine the installation position of each column of light and soft photovoltaic modules on the roof according to the required spacing and position. Use the ink bucket to pop out clear positioning lines, and the width of the positioning lines should be moderate to facilitate accurate alignment of the modules during subsequent construction.

[0040] S4: structure glue is hit.

[0041] In step S4, the structure glue is evenly hit on the wave peak plane of the color steel tile, the structure glue is 6-10mm wide, 3-5mm high, and 1040mm long, and the spacing is not greater than 500mm, that is, one wave peak is spaced.

[0042] A high-quality structure glue that meets relevant standards and engineering requirements is selected to ensure that it has good bonding performance, weather resistance, and corrosion resistance. The brand and model of the structure glue should be strictly screened and confirmed before construction.

[0043] Glue hitting tool: a professional glue gun is used to ensure that the structure glue can be evenly and stably extruded. The glue nozzle of the glue gun should be selected according to the width requirement of the structure glue, generally 6-10mm.

[0044] After hitting the glue, use a scraper or other tools to properly trim the glue strip to ensure that the surface of the glue strip is flat and smooth.

[0045] S5: module pasting.

[0046] In step S5, the light and soft photovoltaic module needs to be installed within 5 minutes after the structure glue is hit to prevent the curing of the silicone from affecting the bonding performance. When installing the module, do not twist the module excessively, hold the white edge of the module with both hands to keep it level, and avoid twisting and deforming the module. When installing, slowly place the module in the glued area, paste the module horizontally and vertically, do not paste it again, and the bonding area cannot be torn or peeled off within 24 hours after construction.

[0047] In step S5, after the module is pasted flat, do not press the battery piece with your hand to stabilize it, use the edge pressing roller to compact the non-battery piece area of the module, and the pressure of the edge pressing roller should be moderate to ensure that the module is in full contact with the structure glue. Use a plastic roller to roll on the surface of the module, the rolling direction should be from one end of the module to the other end, and roll back and forth 2-3 times to ensure that the module is well bonded to the roof, the pasting surface needs to be flat without pits or protrusions, and adjacent modules share a flat aluminum strip, the thickness and width of the flat aluminum strip should meet the design requirements.

[0048] The height of the structural adhesive after pasting in step S5 is not less than 3mm. If the height of the structural adhesive is found to be insufficient, the adhesive should be supplemented in time. It is prohibited to use feet or other non-designated tools to compact the structural adhesive, so as not to damage the performance of the structural adhesive. The junction box is placed on the side of the maintenance channel, which facilitates the string wiring and maintenance inspection. Other components are installed according to the above steps, and the horizontal spacing of the components is 350mm.

[0049] S6: Component string and inverter installation.

[0050] The inverter installation in step S6 follows the following main process: equipment unpacking inspection, inverter installation, inverter cable connection, secondary circuit wiring inspection, inverter test adjustment and power transmission operation acceptance,

[0051] Equipment unpacking inspection: Before unpacking the inverter, check whether the packaging box is intact. After unpacking, check whether the parts of the inverter are complete and the appearance is damaged according to the equipment list. At the same time, check whether the random data of the inverter, such as instruction manual, certificate of quality, warranty card, etc. are complete.

[0052] Inverter installation: According to the design drawing and the installation requirements of the inverter, determine the installation position of the inverter. The installation position should be selected in a place with good ventilation, dryness and no direct sunlight. Use expansion bolts or other fixing parts to firmly install the inverter on the support, and ensure that the inverter is installed horizontally and stably.

[0053] Inverter cable connection: According to the wiring diagram of the inverter, select the appropriate specification of cable for connection. When connecting, first strip the appropriate length of the insulating sheath of one end of the cable, then insert the core into the wiring terminal of the inverter, and use screwdriver or wrench to tighten the wiring terminal to ensure firm connection and good contact. The cable should be reasonably arranged to avoid crossing and winding, and fixed with cable bridge or wire slot.

[0054] Check the secondary circuit wiring: The secondary circuit wiring of the inverter is checked comprehensively, including control cable, signal cable, etc. Check whether the wiring is correct and firm, whether the wiring terminal is loose, and whether the insulation is good. Use multimeter to test the electrical performance of the secondary circuit to ensure that the secondary circuit works normally.

[0055] Inverter test adjustment: After completing the cable connection and secondary circuit wiring inspection, the inverter is tested and adjusted. According to the operation manual of the inverter, the parameters are set and debugged. Use professional test instruments such as power analyzer, oscilloscope, etc. to test the output performance of the inverter, to ensure that the output voltage, current, frequency and other parameters of the inverter meet the design requirements.

[0056] Power transmission operation acceptance: after the completion of the test adjustment of the inverter, the power transmission operation acceptance is carried out. Before power transmission, check whether the wiring, parameter setting, etc. of the inverter are correct again. When power transmission, gradually close the power switch according to the operation procedure, and observe the running state of the inverter. After the inverter runs stably, detect its various performance indicators such as output power, efficiency, harmonic content, etc. to ensure that the inverter runs normally and meets the acceptance standard.

[0057] The electrical connection can be carried out only after the component installation for at least 4 hours, so as to ensure that the structural adhesive is fully cured and the installation firmness of the component is ensured. When the electrical connection is carried out, the weak light at dawn and dusk is selected, 16 flexible components are selected as a string, 4mm 2 Photovoltaic direct current cable, after the convergence of each string direct current cable channel electrical slot box, the convergence is connected to the inverter.

[0058] S7: grid-connected construction.

[0059] In the step S7, the power generated by the photovoltaic unit is connected to the power grid. The roof photovoltaic component is output through the inverter, and then connected to the 10kV special line through the 0.4kV / 10kV step-up transformer and the 10kV step-up transformer. The original metering of the special line and the public network T connection is replaced by bidirectional metering.

[0060] After the soft photovoltaic component construction process, quality acceptance must be carried out, and the following requirements must be met:

[0061] (1) The surface of the base layer must be cleaned or wiped clean, dry, no dust, oil stains, etc.

[0062] (2) The bonding part cannot be torn or peeled off within 24 hours after construction;

[0063] (3) The bonding surface needs to be flat, without concave or convex;

[0064] (4) The height of the structural adhesive after bonding is not less than 3mm, and the structural adhesive should not be pressed with feet or other non-designated tools;

[0065] (5) It is allowed to connect the components in series to increase the voltage or connect them in parallel to increase the current. When connected in series, the positive electrode of the component is connected to the negative electrode of the next component. When connected in parallel, the positive electrode of the component is connected to the positive electrode of the next component;

[0066] (6) The bonding method, the component and the bracket part have no metal conductor, and no grounding system needs to be set;

[0067] (7) It is strictly forbidden to paint, apply adhesive, and paste labels on the surface of the component;

[0068] (8) The electrical wiring can be carried out only after the component installation for at least 4 hours, and the weak light at dawn and dusk is selected as much as possible;

[0069] (9) Photovoltaic acceptance should meet the "Photovoltaic Power Generation Project Acceptance Specification" GB / T50796-2012, "Photovoltaic Power Station Construction Specification" GB / 50794-2012 and other specification requirements.

[0070] The embodiments of the present application are disclosed, but not limited to the preferred embodiments, and the ordinary skilled in the art can easily understand the spirit of the present application and make different inferences and changes according to the above embodiments, as long as they do not deviate from the spirit of the present application, which are within the protection scope of the present application.

Claims

1. A method of installing a lightweight photovoltaic module, characterized by, The method comprises the following steps: S1: equipment inventory, inspection; S2: roof cleaning; S3: positioning; S4: structure glue; S5: component paste; S6: component group string and inverter installation; S7: grid construction.

2. A method of installing a light, flexible photovoltaic assembly according to claim 1, wherein, In the step S1, the quantity and specification on the delivery list, packing list and drawing are checked, and whether the component equipment is damaged in the process of factory and transportation is checked.

3. A method of installing a light, flexible photovoltaic assembly according to claim 2, wherein, In the step S2, the roof base is cleaned by cleaning agent, the cleaning agent is matched by 1 / 4 cup of sodium phosphate, 1 / 2 cup of liquid cleaning agent and 5 gallons of water, the sundries on the roof base is removed, the surface of the base is cleaned after cleaning, and is kept dry, without dust, oil stain and particle.

4. A method of installing a light, flexible photovoltaic assembly according to claim 3, wherein, In the step S3, the position of each column of light and soft photovoltaic components on the roof is determined according to the design drawing, and the positioning is measured.

5. A method of installing a light, flexible photovoltaic assembly according to claim 4, wherein, In the step S4, the structure glue is evenly applied on the wave peak plane of the color steel tile, the structure glue is 6-10mm wide, 3-5mm high, 1040mm long, and the interval is not greater than 500mm, that is, the interval is one wave peak.

6. A method of installing a light, flexible photovoltaic assembly according to claim 5, wherein, In the step S5, the light and soft photovoltaic components are installed within 5 minutes after the structure glue is applied, so as to prevent the curing of the silicone glue from affecting the bonding performance, the components are not excessively twisted during installation, two people hold the white edge of the components, and the components are slowly placed in the glue area, the components are horizontally flat and vertically straight, the components are not pasted twice, and the bonding part cannot be torn or peeled off within 24 hours after construction.

7. A method of installing a light, flexible photovoltaic assembly according to claim 6, wherein, In the step S5, after the components are pasted, the battery pieces are not pressed by hand to stabilize, the edge roller is used to compact the non-battery piece area of the components, the plastic roller is used to roll on the surface of the components, so as to ensure that the components and the roof are well bonded, the pasting surface needs to be flat, without concave or convex, and the adjacent components share the flat aluminum strip.

8. A method of installing a light, flexible photovoltaic assembly according to claim 7, wherein, In the step S5, the height of the structure glue after pasting is not less than 3mm, the foot or other non-specified tools are not used to compact the structure glue, the junction box is placed on the maintenance access side, so as to facilitate the string wiring and maintenance inspection, other components are installed according to the above steps, and the horizontal distance between the components is 350mm.

9. A method of installing a light, flexible photovoltaic assembly according to claim 8, wherein, The inverter installation in step S6 follows the following main process: equipment unpacking inspection, inverter installation, inverter cable connection, secondary circuit wiring inspection, inverter test adjustment and power transmission operation acceptance. The electrical connection can be performed only after the component installation for at least 4 hours, and the weak light of morning and evening is selected. According to 16 flexible components as a string, the direct current cable adopts 4mm 2 Photovoltaic direct current cable, each string of direct current cable channel is connected to the inverter after the convergence of the electrical slot box.

10. A method of installing a light, flexible photovoltaic assembly according to claim 9, wherein, In the step S7, the power generated by the photovoltaic unit is connected to the power grid, the roof photovoltaic components are output by the inverter, the 0.4kV / 10kV step-up transformer is used to output 10kV, the T is connected to the 10kV special line, and the original metering transformation of the special line and the public network T is replaced by bidirectional metering.

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