CN110571845A - Photovoltaic grid-connected power generation system - Google Patents
Photovoltaic grid-connected power generation system Download PDFInfo
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- CN110571845A CN110571845A CN201910702583.5A CN201910702583A CN110571845A CN 110571845 A CN110571845 A CN 110571845A CN 201910702583 A CN201910702583 A CN 201910702583A CN 110571845 A CN110571845 A CN 110571845A
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- 238000010248 power generation Methods 0.000 title claims abstract description 25
- 238000006243 chemical reaction Methods 0.000 claims abstract description 10
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 4
- 238000009434 installation Methods 0.000 claims description 12
- 239000011521 glass Substances 0.000 claims description 8
- 230000017525 heat dissipation Effects 0.000 claims description 7
- 238000007739 conversion coating Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 230000001174 ascending effect Effects 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims 1
- 230000007547 defect Effects 0.000 abstract description 5
- 230000033228 biological regulation Effects 0.000 abstract description 2
- 230000010354 integration Effects 0.000 abstract description 2
- 238000005286 illumination Methods 0.000 description 6
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- WPPDFTBPZNZZRP-UHFFFAOYSA-N aluminum copper Chemical compound [Al].[Cu] WPPDFTBPZNZZRP-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
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- 238000001816 cooling Methods 0.000 description 1
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- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
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- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000010845 search algorithm Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S30/00—Arrangements for moving or orienting solar heat collector modules
- F24S30/40—Arrangements for moving or orienting solar heat collector modules for rotary movement
- F24S30/42—Arrangements for moving or orienting solar heat collector modules for rotary movement with only one rotation axis
- F24S30/425—Horizontal axis
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
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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
- H02S20/30—Supporting structures being movable or adjustable, e.g. for angle adjustment
- H02S20/32—Supporting structures being movable or adjustable, e.g. for angle adjustment specially adapted for solar tracking
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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
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/10—Cleaning arrangements
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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
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/20—Optical components
- H02S40/22—Light-reflecting or light-concentrating means
-
- 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
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/40—Thermal components
- H02S40/42—Cooling means
- H02S40/425—Cooling means using a gaseous or a liquid coolant, e.g. air flow ventilation, water circulation
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
-
- 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
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/47—Mountings or tracking
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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
- Y02E10/52—PV systems with concentrators
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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
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Thermal Sciences (AREA)
- Sustainable Energy (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Business, Economics & Management (AREA)
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- Physics & Mathematics (AREA)
- Photovoltaic Devices (AREA)
Abstract
the invention discloses a photovoltaic grid-connected power generation system which comprises a current processing system and a plurality of integrated photoelectric conversion components, wherein each integrated photoelectric conversion component comprises a photovoltaic assembly, a main controller and a storage battery which are integrated on a support, a maximum power tracker is connected between the photovoltaic assembly and the main controller, a charge-discharge controller is connected between the storage battery and the main controller, the current processing system comprises a direct current combiner box and an alternating current distribution box, the direct current combiner box is connected with the main controller, a centralized inverter is connected between the direct current combiner box and the alternating current distribution box, a bidirectional inverter is connected between the alternating current distribution box and the storage battery, and the alternating current distribution box is connected to a power grid. The invention overcomes the defects of two forms of a photovoltaic grid-connected power generation system with a storage battery and without the storage battery, can be used for a period of time during public power failure, greatly reduces the occupied area of equipment, and has high integration level and good regulation adaptability.
Description
Technical Field
The invention relates to the technical field of photovoltaic power generation, in particular to a photovoltaic grid-connected power generation system.
Background
At present, energy and environmental problems become main problems faced by sustainable development, and solar energy is taken as an important renewable energy source, so that the use amount of coal and petroleum is reduced to a certain extent, and the solar energy is a new energy source which meets the requirements of times development and environmental protection. In recent years, the application of a small-sized solar photovoltaic power generation system is rapidly developed, and the solar photovoltaic power generation system has a wide application prospect.
The photovoltaic grid-connected power generation system mainly comprises two forms of a storage battery and a non-storage battery, wherein the non-storage battery form is that direct current generated by a solar component is converted into alternating current meeting the requirements of a mains supply power grid through a grid-connected inverter and then is directly connected to a public power grid, although the cost is low, photovoltaic power generation cannot be operated when the public power is cut off, and certain defects exist in the use. On one hand, the form with the storage battery increases the production cost, and has the fatal defects of large occupied area and the like, particularly under the condition of short land in urban construction environment, the photovoltaic module occupies a certain terrain, and the storage battery pack occupies other indoor area. Two types of photovoltaic grid-connected power generation systems have certain defects respectively, so that a photovoltaic grid-connected power generation system integrating two types needs to be designed, the problem that the commercial power is cut off and cannot operate is solved, and the whole occupied area of equipment can be reduced.
Disclosure of Invention
the invention aims to overcome the problems in the background art and provide a photovoltaic grid-connected power generation system.
The purpose of the invention is realized by the following technical scheme: a photovoltaic grid-connected power generation system comprises a current processing system and a plurality of integrated photoelectric conversion components, wherein each integrated photoelectric conversion component comprises a photovoltaic assembly, a main controller and a storage battery which are integrated on a support, a maximum power tracker is connected between the photovoltaic assembly and the main controller, a charge-discharge controller is connected between the storage battery and the main controller, a cooling fan for the photovoltaic assembly is connected onto the main controller, the current processing system comprises a direct current combiner box, an alternating current distribution box and an alternating current breaker, the direct current combiner box is connected with the current signal output end of the main controller and combines direct currents generated by a plurality of photovoltaic assemblies into a direct current unit, a centralized inverter is connected between the direct current combiner box and the alternating current distribution box and is used for converting the combined direct current unit into an alternating current unit, and a bidirectional inverter for converting current signals is connected between the alternating current distribution box and the storage battery, the alternating current distribution box is connected to a power grid through an alternating current breaker, a direct current load is connected to the direct current combiner box, and an alternating current load is connected to the alternating current distribution box.
Furthermore, the support comprises a bottom plate, pillars vertically supported on two sides of the bottom plate and photovoltaic panel support frames hinged on the pillars on two sides, each photovoltaic panel support frame comprises a main rotating shaft, a frame-shaped frame obliquely arranged and side plates integrally formed on two sides of the frame-shaped frame, two end parts of the main rotating shaft respectively penetrate through the pillars on two sides and are fixedly connected with the side plates on the corresponding sides, a photovoltaic panel connected with a main controller is placed on the frame-shaped frame, a mounting shell is fixed on the bottom plate, the maximum power tracker, the main controller, the charge and discharge controller and the storage battery are all arranged in the mounting shell, the middle part of the main rotating shaft is positioned right above the mounting shell, a plurality of vertically downward stress plates are fixed at the middle part of the main rotating shaft, at least one pair of limiting columns are fixed on the upper surface of the mounting shell, and the pair of limiting columns are respectively positioned on the front side and the rear side of one stress plate and are used for limiting the rotation angle, the mounting shell upper surface is provided with a plurality of thermal drive devices that are used for preceding top atress board, the bottom plate bottom is provided with a plurality of universal gyro wheels.
Further, hot drive arrangement includes rectangular shape and head end opening, terminal sealed shell and place the sealed urceolus in the shell, the terminal sealed department of shell is provided with the glass protection shield, sealed urceolus is close to the shell end and is located the inside surface of glass protection shield and scribbles the light and heat conversion coating, be provided with the piston in the sealed urceolus, it has the gas that can be heated the thermal expansion to annotate between the inner chamber of piston one side and sealed urceolus, and the piston opposite side is fixed with the piston rod that is used for pushing away the atress board.
Further, a flat push plate is fixed at the end of the piston rod.
Further, the mounting shell is provided with heat dissipation holes, and the heat dissipation fan is arranged in the heat dissipation holes and connected with the main controller.
Furthermore, a transparent condensing lens is further arranged on the frame, and the condensing lens is positioned above the photovoltaic panel.
Further, be provided with the spout of notch cuttype on the frame type frame, the photovoltaic board is placed in the spout of lower floor's ladder, condensing lens places in the spout of upper ladder, frame type frame slope one side down is sealed, and the ascending side opening of slope.
Furthermore, frame open-ended one side is provided with adjustable rain-proof mechanism, and rain-proof mechanism includes weather shield and two adjusting bolt, the both sides of weather shield all have the bar hole, and two adjusting bolt pass two bar holes respectively and will weather shield and fix opening one side at the frame.
The invention has the beneficial effects that:
1. By integrating the photovoltaic module, the main controller and the storage battery on the bracket, the available space of the traditional photovoltaic panel bracket is greatly utilized, the photovoltaic grid-connected power generation mode with the storage battery is realized, the power is supplied to a load when the public power is cut off, the floor area of equipment is greatly reduced, and the condition of shortage of urban construction land is relieved;
2. By arranging the rotatable photovoltaic panel support frame and the thermal driving device capable of driving the photovoltaic panel support frame to rotate, when the solar irradiation intensity is high or the radiant heat energy is concentrated, the thermal driving device is driven by heat and pushes the photovoltaic panel support frame to rotate, so that the angle of the photovoltaic panel is adjusted spontaneously to be convenient for fully receiving the solar radiation energy, and when the solar irradiation intensity is low, the angle of the photovoltaic panel support frame rotates normally;
3. Through being provided with condensing lens on the photovoltaic board, condensing lens not only can gather illumination, can also reduce rainy weather raindrop and drip to the photovoltaic board and cause the possibility of equipment trouble, and the adjustable mechanism that keeps off the rain is disposed simultaneously, can carry out omnidirectional protection to the photovoltaic board in rainy weather.
Drawings
FIG. 1 is a schematic diagram of the system connection of the present invention;
fig. 2 is a schematic structural view of an integrated photoelectric conversion device according to the present invention;
Fig. 3 is an enlarged schematic view of a portion a of fig. 2.
The labels in the figure are: 1-a bottom plate; 2-a pillar; 3-mounting the shell; 4-photovoltaic panel support frame; 5-main rotating shaft; 6-stress plate; 7-universal rollers; 8-a thermal drive; 9-a condenser lens; 10-a photovoltaic panel; 11-a rain shield; 12-a strip-shaped hole; 13-adjusting the bolt; 14-a heat dissipation fan; 15-a limiting column; 41-a frame; 42-edge plate; 81-a housing; 82-glass protection plate; 83-sealing the outer cylinder; 84-a piston rod; 85-flat push plate.
Detailed Description
As shown in fig. 1 to 3, the photovoltaic grid-connected power generation system provided in this embodiment includes a current processing system and a plurality of integrated photoelectric conversion components, each integrated photoelectric conversion component includes a photovoltaic module integrated on a support, a main controller and a storage battery, a maximum power tracker is connected between the photovoltaic module and the main controller, the maximum power tracker employs a Boost converter, the maximum power point tracking in the entire system is completed mainly by using a conventional search algorithm, the main controller employs an STC12C5408AD single chip microcomputer, a charge-discharge controller is connected between the storage battery and the main controller, when a direct current is generated by the photovoltaic module, an SPWM signal is generated by the STC12C54 5408AD single chip microcomputer, the tracking function of a current frequency phase is realized, and the position of the maximum power point is calculated and judged by the Boost converter, so as to determine a control signal of the next. The direct current part that will produce stores in the battery, not only can control the storage electric quantity in the battery through setting up charge-discharge controller, can also prevent battery overcharge or overdischarge, can also prevent battery reverse discharge at night simultaneously, has improved the security that the battery used greatly. When the storage battery finishes the electric quantity storage, the generated redundant direct current is converged into the current processing system.
The current processing system comprises a direct current convergence box, an alternating current distribution box and an alternating current breaker, wherein the direct current convergence box is connected with a current signal output end of a main controller and integrates direct current generated by a plurality of photovoltaic assemblies into a direct current unit, a centralized inverter is connected between a signal transmission end of the direct current convergence box and a signal transmission end of the alternating current distribution box and used for converting the integrated direct current unit into an alternating current unit, a bidirectional inverter for converting current signals is connected between the alternating current distribution box and a storage battery and arranged in the alternating current distribution box, the alternating current distribution box is connected into a mains supply power grid through the alternating current breaker, the use safety performance of the alternating current distribution box is improved, a direct current load is connected to an output end of the direct current convergence box, and an alternating current load is connected to an output end of the alternating current distribution box. One part of the direct current unit integrated in the direct current confluence box can be used by direct current loads such as a motor and a desk lamp, the other part of the direct current unit can be converged into an alternating current distribution box for being used by the alternating current loads after being converted by DC/AC, when a public mains supply power grid is powered off, the electricity stored in the storage battery continues to supply power for the direct current loads and the alternating current loads, when continuous rainy weather occurs, the current in the mains supply power grid can be controlled to be stored in the storage battery for standby, of course, a power meter is required to be designed to purchase corresponding power grid electric quantity for use, and the part is the existing mature technology, so the repeated description is avoided.
In order to improve the integrated level of whole integrated form photoelectric conversion component, reduce its area, the support includes bottom plate 1, vertical support at the pillar 2 of bottom plate 1 both sides and articulates photovoltaic board support frame 4 on pillar 2 of both sides, bottom plate 1 bottom is provided with the motion convenience of a plurality of universal gyro wheels 7 in order to improve the device, photovoltaic board support frame 4 includes main pivot 5, the frame 42 and the sideboard 41 of integrated into one piece in frame 42 both sides that slope 40 set up, and main pivot 5's two tip pass the pillar 2 of both sides and with the sideboard 41 fixed connection that corresponds the side through the bearing respectively for whole photovoltaic board support frame 4 is pillar 2 rotates relatively. The photovoltaic panel 10 connected with the main controller is placed on the frame 42, and the photovoltaic panel 10 is a main component of the photovoltaic module. In order to prevent that it soaks to the inside circuit structure of photovoltaic board 10 in continuous overcast and rainy weather rainwater, transparent condensing lens 9 has still been placed on frame 42, and it specifically, be provided with the spout of notch cuttype on frame 42, photovoltaic board 10 is placed in the spout of lower floor's ladder, condensing lens places 9 in the spout of upper ladder for condensing lens 9 is located the top of photovoltaic board 10, can not only play the effect of gathering illumination, can also prevent that the rainwater from soaking photovoltaic board 10. In order to facilitate the installation of the photovoltaic panel 10 and the condenser lens 9, the frame 42 is sealed at the side facing downwards in an inclined manner, and is opened at the side facing upwards in an inclined manner, and the photovoltaic panel 10 and the condenser lens 9 slide into the corresponding sliding grooves from the side facing the frame 42. Because frame 42 upside opening has reduced its leakproofness, frame 42 open-ended one side is provided with adjustable rain blocking mechanism, and rain blocking mechanism includes weather shield 11 and two adjusting bolt 13, weather shield 11's both sides all have the bar hole 12, and two adjusting bolt 13 pass two bar holes 12 respectively and fix weather shield 11 in frame 42's opening one side, and the opening side of weather shield 11 messenger's sealed frame 42 of upwards sliding rain shield 11, then screws up adjusting bolt 13 and fixes weather shield 11.
in order to avoid components and parts such as battery, main control unit to receive the sunlight direct irradiation, be fixed with installation shell 3 on bottom plate 1, installation shell 3 is located photovoltaic board support frame 4 under, maximum power tracker, main control unit, charge and discharge controller and battery all integrated the setting in installation shell 3, be provided with a plurality of louvres on the lateral wall of installation shell 3, be provided with radiator fan 14 of being connected with main control unit in at least one of them louvre for dispel the heat in the 3 inner chambers of installation shell. In this embodiment, the middle part of main pivot 5 is located installation shell 3 directly over, and the middle part of main pivot 5 is fixed with three vertical decurrent atress boards 6, be fixed with a pair of spacing post 15 on the upper surface of installation shell 3, a pair of spacing post 15 is located the front side and the rear side of middle atress board 6 respectively and is used for restricting the turned angle of atress board 6, limits the inclination angle scope of whole photovoltaic board support frame 4 at 30 ~ 40 within ranges. With 4 things trends of photovoltaic board support frame setting, at the noon of sunshine direct projection, radiant energy intensity is the highest, is 30 the inclination adjustment of photovoltaic board 10 can be convenient for receive solar energy illumination more fully. In this embodiment, the photo-thermal driving mechanism is adopted to realize the rotation of the photovoltaic panel support frame 4, so as to greatly reduce the energy consumption, the upper surface of the mounting shell 3 is provided with two thermal driving devices 8 for pushing the other two stress plates 6 in front, each thermal driving device 8 comprises a strip-shaped and head-end opening, a shell 81 with a sealed tail end and a sealed outer cylinder 83 placed in the shell 81, a glass protection plate 82 is arranged at the tail end sealing position of the shell 81, the sealed outer cylinder 83 is made of aluminum-copper alloy, the surface of the sealed outer cylinder, which is close to the tail end of the shell 81 and is positioned in the inner part of the glass protection plate 82, is coated with a photo-thermal conversion coating, a piston (not shown in the figure) is arranged in the sealed outer cylinder 83, gas or liquid capable of expanding under heat is injected between one side of the piston and the inner cavity of the sealed outer cylinder 83, piston rod 84 end fixing has the flat push pedal 85 that increases the lifting surface area, when noon illumination is stronger, light and heat coating conversion efficiency improves, through sealed urceolus 83 heat conduction, make its inner seal's air continuously expand, thereby promote the piston, make piston rod 84 promote atress board 6 slowly forward, reach the purpose of 4 angular adjustment of photovoltaic board support frame, need not set up extra power unit, spontaneous drive and the inclination of adjusting photovoltaic board 10 under the abundant condition of illumination, thereby more fully receive solar illumination, change along with the change of light intensity completely, but have higher adaptability.
The invention overcomes the defects of two forms of a photovoltaic grid-connected power generation system with a storage battery and without the storage battery, can be used for a period of time during public power failure, greatly reduces the occupied area of equipment, and has high integration level and good regulation adaptability.
The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any modification and replacement based on the technical solution and inventive concept provided by the present invention should be covered within the scope of the present invention.
Claims (8)
1. A grid-connected photovoltaic power generation system is characterized in that: the photovoltaic conversion system comprises a direct current combiner box, an alternating current distribution box and an alternating current circuit breaker, wherein the direct current combiner box is connected with the current signal output end of the main controller and used for combining direct currents generated by a plurality of photovoltaic components into a direct current unit, a centralized inverter is connected between the direct current combiner box and the alternating current distribution box and used for converting the combined direct current unit into an alternating current unit, and a bidirectional inverter for converting current signals is connected between the alternating current distribution box and the storage battery, the alternating current distribution box is connected to a power grid through an alternating current breaker, a direct current load is connected to the direct current combiner box, and an alternating current load is connected to the alternating current distribution box.
2. The grid-connected photovoltaic power generation system according to claim 1, characterized in that: the support comprises a bottom plate, pillars vertically supported on two sides of the bottom plate and photovoltaic panel support frames hinged on the pillars on two sides, each photovoltaic panel support frame comprises a main rotating shaft, a frame-shaped frame obliquely arranged and side panels integrally formed on two sides of the frame-shaped frame, two end parts of the main rotating shaft respectively penetrate through the pillars on two sides and are fixedly connected with the side panels on the corresponding sides, the photovoltaic panel connected with a main controller is placed on the frame-shaped frame, an installation shell is fixed on the bottom plate, the maximum power tracker, the main controller, the charge and discharge controller and the storage battery are all arranged in the installation shell, the middle part of the main rotating shaft is positioned right above the installation shell, a plurality of vertically downward stress plates are fixed at the middle part of the main rotating shaft, at least one pair of limiting columns is fixed on the upper surface of the installation shell, and the pair of limiting columns are respectively positioned on the front side and the rear side of one stress plate and are used for limiting the, the mounting shell upper surface is provided with a plurality of thermal drive devices that are used for preceding top atress board, the bottom plate bottom is provided with a plurality of universal gyro wheels.
3. The grid-connected photovoltaic power generation system according to claim 2, characterized in that: the thermal driving device comprises a long strip-shaped opening and a head end opening, a tail end sealed shell and a sealed outer barrel arranged in the shell, wherein a glass protection plate is arranged at the tail end sealing position of the shell, the sealed outer barrel is close to the tail end of the shell and is positioned in the glass protection plate, a photo-thermal conversion coating is coated on the surface of the inner part of the glass protection plate, a piston is arranged in the sealed outer barrel, gas capable of expanding by heating is injected between one side of the piston and the inner cavity of the sealed outer barrel, and a piston rod used for pushing a stress plate.
4. The grid-connected photovoltaic power generation system according to claim 3, characterized in that: and a flat push plate is fixed at the end part of the piston rod.
5. The grid-connected photovoltaic power generation system according to claim 4, characterized in that: the mounting shell is provided with heat dissipation holes, and the heat dissipation fan is arranged in the heat dissipation holes and connected with the main controller.
6. The grid-connected photovoltaic power generation system according to claim 2 or 3, characterized in that: and a transparent condensing lens is also arranged on the frame, and the condensing lens is positioned above the photovoltaic panel.
7. The grid-connected photovoltaic power generation system according to claim 6, characterized in that: be provided with the spout of notch cuttype on the frame, the photovoltaic board is placed in the spout of lower floor's ladder, condensing lens places in the spout of upper ladder, frame slope one side down is sealed, the ascending side opening of slope.
8. The grid-connected photovoltaic power generation system according to claim 7, characterized in that: the adjustable rain-shielding mechanism is arranged on one side of the opening of the frame, the rain-shielding mechanism comprises a rain-shielding plate and two adjusting bolts, strip-shaped holes are formed in two sides of the rain-shielding plate, and the two adjusting bolts penetrate through the two strip-shaped holes respectively and fix the rain-shielding plate on one side of the opening of the frame.
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