CN116545277B - Grid-connected photovoltaic energy storage inverter and control method thereof - Google Patents
Grid-connected photovoltaic energy storage inverter and control method thereof Download PDFInfo
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- CN116545277B CN116545277B CN202310811186.8A CN202310811186A CN116545277B CN 116545277 B CN116545277 B CN 116545277B CN 202310811186 A CN202310811186 A CN 202310811186A CN 116545277 B CN116545277 B CN 116545277B
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- 238000004146 energy storage Methods 0.000 title claims abstract description 82
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000009434 installation Methods 0.000 claims abstract description 74
- 230000017525 heat dissipation Effects 0.000 claims abstract description 68
- 230000007246 mechanism Effects 0.000 claims abstract description 47
- 239000000843 powder Substances 0.000 claims abstract description 17
- 239000000779 smoke Substances 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims abstract description 10
- 239000007921 spray Substances 0.000 claims abstract description 10
- 239000000428 dust Substances 0.000 claims description 16
- 238000009423 ventilation Methods 0.000 claims description 16
- 230000005540 biological transmission Effects 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 6
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 230000005484 gravity Effects 0.000 abstract description 5
- 230000009471 action Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 3
- 238000010009 beating Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/02—Nozzles specially adapted for fire-extinguishing
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
- A62C37/36—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device
- A62C37/38—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device by both sensor and actuator, e.g. valve, being in the danger zone
- A62C37/40—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device by both sensor and actuator, e.g. valve, being in the danger zone with electric connection between sensor and actuator
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/28—Casings; Parts thereof or accessories therefor dustproof, splashproof, drip-proof, waterproof or flameproof
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/46—Boxes; Parts thereof or accessories therefor
- H02B1/48—Mounting of devices therein
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/56—Cooling; Ventilation
- H02B1/565—Cooling; Ventilation for cabinets
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/14—Mounting supporting structure in casing or on frame or rack
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
- H05K7/20909—Forced ventilation, e.g. on heat dissipaters coupled to components
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Inverter Devices (AREA)
Abstract
The invention relates to the technical field of photovoltaic energy storage inverters, in particular to an off-grid photovoltaic energy storage inverter and a control method thereof. The device comprises a box body, wherein an installation chamber is arranged in the box body; an inverter body, a relay and a voltage detector are arranged on the inner wall of one side of the installation chamber; an energy storage mechanism is arranged in the mounting chamber; and a smoke sensor is arranged on the inner wall of the top of the installation chamber. According to the invention, smoke generated in the installation chamber is monitored by utilizing the smoke sensor, and the two groups of electric push rods are controlled by transmitting signals to drive the sealing plate to rise and penetrate into the first heat dissipation through groove, when the air pressure in the installation chamber rises to be always equal to the outside, the plurality of groups of dust-proof plates rotate to the lowest position under the action of gravity, so that the installation chamber is closed, then the electromagnetic valve is controlled to be opened, so that dry powder in the dry powder fire extinguisher is sprayed out through the plurality of groups of fire extinguishing spray heads, fire is extinguished in the installation chamber, and the fireproof performance of the energy storage inverter is improved.
Description
Technical Field
The invention belongs to the technical field of photovoltaic energy storage inverters, and particularly relates to an off-grid photovoltaic energy storage inverter and a control method thereof.
Background
The off-grid photovoltaic energy storage inverter can convert variable direct current voltage generated by a photovoltaic solar panel into alternating current with mains frequency, can be connected with a power supply network in a grid-connected mode, can work off-grid mode, and is switched into a battery energy storage or energy supply mode.
To be searched, in the prior art, chinese patent bulletin number: CN115207964a, publication date: 2022-10-18 discloses a high-efficient photovoltaic is from grid-connected energy storage dc-to-ac converter, including the protection box, be equipped with dc-to-ac converter electrical components in the protection box, a plurality of louvres have been seted up to the lateral wall of protection box, the louvre is embedded to be equipped with the dust screen, the protection box outside still fixedly connected with a plurality of fin, be equipped with a plurality of cylinder of beating in the protection box, just the cylinder of beating sets up in the dust screen inboard, the gas storage groove has been seted up to the lateral wall of protection box, sealed sliding connection has the rubber buffer in the gas storage groove, just the rubber buffer passes through reset spring to be connected on the gas storage groove inner wall. According to the invention, heat energy generated in the working process of the inverter is collected and the exhaust mechanism is operated, so that the knocking cylinder is periodically deformed in the exhaust process to knock the dust screen, dust on the dust screen can be promoted to fall off, the dust can be prevented from entering the inside of the inverter by arranging the dust screen, and meanwhile, the ventilation state of the dust screen can be maintained for a long time.
However, the energy storage inverter still has the following defects:
the energy storage inverter is operated for a long time, the temperature of an internal electric element of the energy storage inverter can be gradually increased when the internal electric element is operated for a long time, the phenomenon that the internal electric element is short-circuited is easily caused by the overhigh temperature of the electric element, the fire disaster is easy to happen, and a large amount of economic loss can be caused when fire cannot be extinguished in time, so that the fireproof performance of the energy storage inverter is reduced.
Disclosure of Invention
Aiming at the problems, the invention provides an off-grid photovoltaic energy storage inverter, which comprises a box body, wherein an installation chamber is arranged in the box body; an inverter body, a relay and a voltage detector are arranged on the inner wall of one side of the installation chamber; an energy storage mechanism is arranged in the mounting chamber; a smoke sensor is arranged on the inner wall of the top of the installation chamber; two groups of electric push rods are arranged on the inner wall of the top of the installation chamber; the output ends of the two groups of electric push rods are in transmission connection with sealing plates; a first heat dissipation through groove is formed in the center of the top of the mounting chamber; the sealing plate movably penetrates through the first heat dissipation through groove; the top of the box body is provided with a heat dissipation mechanism; a plurality of groups of fire extinguishing spray heads are respectively arranged on the inner walls of the two sides of the installation chamber vertical to the opening at equal intervals along the vertical direction; two side walls of the box body perpendicular to the box door are respectively provided with a group of fireproof boxes; a group of dry powder fire extinguishers are arranged in each group of fire-proof boxes; a group of electromagnetic valves are arranged on the inner wall of one side of each group of fireproof boxes, which is close to the installation chamber; two ends of each group of electromagnetic valves are respectively communicated with a group of corresponding dry powder fire extinguishers and a plurality of groups of fire extinguishing spray heads; a ventilation through groove is formed in the inner wall of one side, far away from the opening, of the bottom of the installation chamber; a dustproof net is arranged at one end of the ventilation through groove far away from the installation chamber; a plurality of groups of dust-proof plates are sequentially hinged in the ventilation through groove at equal intervals along the vertical direction; the dust-proof plates are movably abutted together in sequence; a plurality of groups of limiting rods are arranged in the ventilation through groove at equal intervals along the vertical direction; the limiting rods are positioned at one side of the dust-proof plate far away from the installation chamber; each group of dust-proof plates are movably abutted against one side wall of the corresponding group of limiting rods.
Further, a temperature sensor is arranged on the inner wall of the top of the installation chamber; the heat dissipation mechanism is movably communicated with the mounting chamber; the inverter body is electrically connected with the relay; the voltage detector is electrically connected with the relay.
Furthermore, two groups of sliding grooves are symmetrically formed in the inner wall of the bottom of the installation chamber; a group of fixed blocks are connected in each group of sliding grooves in a sliding manner; an adjusting cavity is arranged in the bottom of the mounting chamber; the adjusting cavity is communicated with the two groups of sliding grooves.
Further, two groups of screw rods are arranged in the adjusting cavity along the sliding direction of the fixed block; one ends of the two groups of screw rods are fixedly connected, and the other ends of the screw rods are respectively and rotatably connected to the inner walls of the two sides of the adjusting cavity; the thread directions of the two groups of screw rods are opposite, and the central axes of the screw rods are on the same straight line.
Further, two groups of sliding blocks are connected to the inner wall of the bottom of the adjusting cavity in a sliding manner; the two groups of sliding blocks are respectively in threaded connection with one group of screw rods; the two groups of sliding blocks are respectively connected with one group of fixed blocks in a transmission way; the joint of the two groups of the screw rods is sleeved with a first bevel gear; a motor is arranged in the adjusting cavity; the output end of the motor is in transmission connection with a second bevel gear; the second bevel gear is in meshed connection with the first bevel gear.
Further, the heat dissipation mechanism comprises a housing; a plurality of groups of mounting holes are formed in the top edge of the shell; a heat dissipation cavity is formed in the shell; two groups of shutters are symmetrically arranged on the inner walls of the two sides of the heat dissipation cavity.
Further, a second heat dissipation through groove is formed in the center of the inner wall of the bottom of the heat dissipation cavity; the second heat dissipation through groove is movably communicated with the mounting chamber; and a cooling fan is arranged at the center of the inner wall of the bottom of the cooling cavity.
Further, the energy storage mechanism comprises a bottom plate; two groups of fixing grooves are symmetrically formed in the edges of two sides of the top of the bottom plate; each group of the fixed blocks movably penetrate through a corresponding group of fixed grooves; a plurality of groups of mounting plates are arranged above the bottom plate at equal intervals; a plurality of groups of support columns are arranged between two adjacent groups of mounting plates and between the lowermost group of mounting plates and the bottom plate.
Further, the top of each group of mounting plates is provided with a plurality of groups of heat dissipation through holes in a rectangular array distribution manner; the tops of each group of mounting plates and the bottom plate are respectively provided with a plurality of groups of storage battery placing grooves in a rectangular array distribution manner; and a group of storage batteries are arranged in each group of storage battery placing grooves.
A control method of a grid-connected photovoltaic energy storage inverter is characterized by comprising the following steps of: the control method comprises the following steps:
the inverter body converts direct current generated by the photovoltaic module into stable alternating current and inputs the stable alternating current into a power grid through the relay;
the voltage detector detects that the power grid voltage is abnormal;
the control relay switching circuit is used for electrically connecting the inverter body with the energy storage mechanism;
the inverter body converts direct current generated by the photovoltaic module into stable alternating current and inputs the stable alternating current into the energy storage mechanism through the relay;
the energy storage mechanism stores electric energy and becomes a new energy supply unit.
The beneficial effects of the invention are as follows:
1. through utilizing the smog that produces in the smoke transducer monitoring installation room to send signal control two sets of electric putter drive closing plate and rise and run through to the first heat dissipation through the inslot, the indoor atmospheric pressure of installation rises to always with the external world, and a plurality of groups dust guard rotate to the below under the effect of gravity, makes the installation room seal, then control solenoid valve open, makes the dry powder in the dry powder fire extinguisher put out a fire through a plurality of groups fire sprinkler ejection, put out a fire in the installation room, has improved energy storage inverter's fire behavior.
2. The second bevel gear is driven to rotate through the control motor, the two groups of screw rods rotate under the meshing connection relation of the second bevel gear and the first bevel gear, the two groups of screw rods drive the two groups of fixing blocks to movably penetrate into the two groups of fixing grooves under the threaded connection relation of the two groups of screw rods and the two groups of sliding blocks, and therefore the energy storage mechanism is fixed, the energy storage inverter is simpler and faster when the energy storage mechanism is installed and detached, and the installation convenience of the energy storage inverter is improved.
3. The energy storage dc-to-ac converter can produce the heat at the during operation, and air thermal expansion can rise to the top of installing the room, and heat dissipation mechanism installs at the top of box, and radiator fan leads to the groove and first heat dissipation through the second heat dissipation and leads to the hot air at room top to be taken out to the shutter through both sides is discharged, not only can quick exhaust hot air, has improved the radiating effect of energy storage dc-to-ac converter, still can cooperate two sets of shutters through the high both sides low setting in the middle of the heat dissipation chamber, improves the rain-proof effect of energy storage dc-to-ac converter.
4. Through utilizing the dc-to-ac converter body to convert the direct current that photovoltaic module produced into stable alternating current and through the relay input to the electric wire netting in, when voltage detector monitored that electric wire netting voltage appears unusual, can send signal control relay switching circuit, transfer the power and store to in the energy storage mechanism for the energy storage mechanism becomes new energy supply unit, has realized the off-grid function of energy storage inverter, has improved the practicality of energy storage inverter.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 shows a schematic diagram of a structure of an energy storage inverter according to an embodiment of the invention;
fig. 2 shows a schematic diagram of a structure of an energy storage inverter door according to an embodiment of the present invention when the door is opened;
FIG. 3 illustrates an exploded schematic view of an energy storage inverter according to an embodiment of the present invention;
FIG. 4 shows a schematic cross-sectional view of a tank according to an embodiment of the invention;
FIG. 5 shows a right side cross-sectional schematic view of a tank according to an embodiment of the invention;
FIG. 6 shows an enlarged schematic view at A of FIG. 5, in accordance with an embodiment of the invention;
FIG. 7 shows an enlarged schematic view at B of FIG. 5, according to an embodiment of the invention;
FIG. 8 shows a schematic structural view of a heat dissipation mechanism according to an embodiment of the present invention;
FIG. 9 illustrates a right side cross-sectional view of a heat dissipation mechanism in accordance with an embodiment of the invention;
fig. 10 shows a schematic structural diagram of an energy storage mechanism according to an embodiment of the present invention.
In the figure: 1. a case; 2. a heat dissipation mechanism; 3. a fire-resistant box; 4. a door; 5. a mounting chamber; 6. an energy storage mechanism; 7. a chute; 8. a fixed block; 9. fire extinguishing spray heads; 10. a dust-proof plate; 11. a first heat dissipation through groove; 12. a temperature sensor; 13. a smoke sensor; 14. an inverter body; 15. a relay; 16. a voltage detector; 17. an electromagnetic valve; 18. a dry powder fire extinguisher; 19. a regulating chamber; 20. a screw rod; 21. a slide block; 22. a motor; 23. ventilation through grooves; 24. a first bevel gear; 25. a second bevel gear; 26. a dust screen; 27. a limit rod; 28. an electric push rod; 29. a sealing plate; 201. a housing; 202. a mounting hole; 203. a shutter; 204. a heat dissipation cavity; 205. a second heat dissipation through groove; 206. a heat radiation fan; 601. a bottom plate; 602. a fixing groove; 603. a mounting plate; 604. a support column; 605. a heat dissipation through hole; 606. a battery placement groove; 607. and a storage battery.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment of the invention provides an off-grid photovoltaic energy storage inverter, which comprises a box body 1. As shown in fig. 1, 2, 3, 4, 5, 6 and 7, the box 1 is provided with a mounting chamber 5; an opening is formed in the inner wall of one side of the installation chamber 5; the opening is provided with a box door 4; an inverter body 14, a relay 15 and a voltage detector 16 are arranged on the inner wall of one side of the installation chamber 5 away from the opening; the inverter body 14 is electrically connected with the relay 15; the voltage detector 16 is electrically connected with the relay 15; an energy storage mechanism 6 is arranged in the installation chamber 5; a temperature sensor 12 and a smoke sensor 13 are arranged on the top inner wall of the installation chamber 5; a first heat dissipation through groove 11 is formed in the center of the top of the installation chamber 5; two groups of electric push rods 28 are arranged on the top inner wall of the installation chamber 5; the two groups of electric push rods 28 are symmetrically arranged at two sides of the first heat dissipation through groove 11; the output ends of the two groups of electric push rods 28 are in transmission connection with sealing plates 29; the sealing plate 29 movably penetrates through the first heat dissipation through groove 11; the top of the box body 1 is provided with a heat dissipation mechanism 2; the heat dissipation mechanism 2 is movably communicated with the installation chamber 5; a plurality of groups of fire extinguishing spray heads 9 are respectively arranged on the inner walls of the two sides of the installation chamber 5 perpendicular to the opening at equal intervals along the vertical direction; two side walls of the box body 1 perpendicular to the box door 4 are respectively provided with a group of fireproof boxes 3; a group of dry powder fire extinguishers 18 are arranged in each group of fireproof boxes 3; a group of electromagnetic valves 17 are arranged on the inner wall of one side of each group of fireproof boxes 3 close to the installation chamber 5; two ends of each group of electromagnetic valves 17 are respectively communicated with a group of corresponding dry powder fire extinguishers 18 and a plurality of groups of fire extinguishing spray heads 9; a ventilation through groove 23 is formed in the inner wall of one side, far away from the opening, of the bottom of the installation chamber 5; the end of the ventilation through groove 23, which is far away from the installation chamber 5, is provided with a dust screen 26; a plurality of groups of dust-proof plates 10 are sequentially hinged in the ventilation through groove 23 at equal intervals along the vertical direction; the dust-proof plates 10 are movably abutted together in sequence; a plurality of groups of limiting rods 27 are arranged in the ventilation through grooves 23 at equal intervals along the vertical direction; the groups of limit rods 27 are positioned on one side of the dust-proof plate 10 away from the installation chamber 5; each group of the dust-proof plates 10 is movably abutted against one side wall of the corresponding group of the limiting rods 27; two groups of sliding grooves 7 are symmetrically formed in the inner wall of the bottom of the mounting chamber 5; a group of fixed blocks 8 are slidably connected in each group of sliding grooves 7; an adjusting cavity 19 is arranged in the bottom of the mounting chamber 5; the adjusting cavity 19 is communicated with the two groups of sliding grooves 7; two groups of screw rods 20 are arranged in the adjusting cavity 19 along the sliding direction of the fixed block 8; one ends of the two groups of screw rods 20 are fixedly connected, and the other ends of the screw rods are respectively and rotatably connected to the inner walls of the two sides of the adjusting cavity 19; the screw thread directions of the two groups of screw rods 20 are opposite, and the central axes are on the same straight line; two groups of sliding blocks 21 are connected to the inner wall of the bottom of the adjusting cavity 19 in a sliding manner; the two groups of sliding blocks 21 are respectively in threaded connection with one group of screw rods 20; the two groups of sliding blocks 21 are respectively in transmission connection with one group of fixed blocks 8; a first bevel gear 24 is sleeved at the joint of the two groups of screw rods 20; a motor 22 is arranged in the adjusting cavity 19; the output end of the motor 22 is in transmission connection with a second bevel gear 25; the second bevel gear 25 is in meshed connection with the first bevel gear 24.
When the energy storage inverter is installed, the energy storage mechanism 6 is placed in the installation chamber 5, then the motor 22 is controlled to drive the second bevel gear 25 to rotate, under the meshing connection relation of the second bevel gear 25 and the first bevel gear 24, the two groups of screw rods 20 rotate, under the threaded connection relation of the two groups of screw rods 20 and the two groups of sliding blocks 21, the two groups of sliding blocks 21 drive the two groups of fixing blocks 8 to movably penetrate through the energy storage mechanism 6 to fix the energy storage mechanism 6, and the disassembly and the installation are simple and quick, so that the installation convenience is improved. One end of the inverter body 14 is electrically connected with the photovoltaic module, the other end of the inverter body is electrically connected with the relay 15, the relay 15 is electrically connected with the energy storage mechanism 6, the voltage detector 16 and the power grid, the voltage detector 16 is electrically connected with the power grid, the inverter body 14 is normally connected with the power grid through the relay 15, direct current generated by the photovoltaic module is converted into stable alternating current and is transmitted to the power grid, the voltage detector 16 is used for detecting the voltage condition of the power grid, when the voltage of the power grid changes and exceeds a standard value, the voltage detector 16 can control the relay 15 to switch the circuit, the inverter body 14 is connected with the energy storage mechanism 6, the energy storage mechanism 6 is used for storing electricity and supplying electricity, and the grid-connection function of the energy storage inverter is realized. When the temperature in the installation room 5 exceeds the standard value, the heat dissipation fan 206 is started to discharge hot air accumulated at the top of the installation room 5, the air pressure in the installation room 5 is reduced, so that the outside air pushes a plurality of groups of dust boards 10 through the ventilation through grooves 23 and enters the installation room 5, and the heat dissipation effect of the energy storage inverter is improved. When the energy storage inverter is in fire, when the smoke sensor 13 senses smoke, signals are sent to control the two groups of electric push rods 28 to drive the sealing plate 29 to rise and penetrate into the first heat dissipation through groove 11, when the air pressure in the installation chamber 5 rises to be constant with the outside, the plurality of groups of dust boards 10 rotate to the lowest position under the action of gravity, the installation chamber 5 is sealed, then the electromagnetic valve 17 is controlled to be opened, dry powder in the dry powder extinguisher 18 is sprayed out through the plurality of groups of fire extinguishing spray heads 9, fire is extinguished in the installation chamber 5, and the fireproof performance of the energy storage inverter is improved.
As shown in fig. 8 and 9, the heat dissipation mechanism 2 includes a housing 201; a plurality of groups of mounting holes 202 are formed in the top edge of the shell 201; a heat dissipation cavity 204 is formed in the shell 201; two groups of shutters 203 are symmetrically arranged on the inner walls of two sides of the heat dissipation cavity 204; a second heat dissipation through groove 205 is formed in the center of the bottom inner wall of the heat dissipation cavity 204; the second heat dissipation through groove 205 is movably communicated with the installation chamber 5; a cooling fan 206 is disposed at the center of the bottom inner wall of the cooling cavity 204.
The heat dissipation fan 206 extracts the hot air at the top of the installation chamber 5 through the second heat dissipation through groove 205 and the first heat dissipation through groove 11, and is discharged through the shutters 203 at the two sides, the middle of the heat dissipation cavity 204 is higher and the two sides are lower, and the two groups of shutters 203 are matched, so that the heat dissipation function is realized, and meanwhile, the heat dissipation device has a good rainproof effect.
Illustratively, as shown in fig. 10, the energy storage mechanism 6 includes a base plate 601; two groups of fixing grooves 602 are symmetrically formed at the edges of the two sides of the top of the bottom plate 601; each group of the fixed blocks 8 movably penetrates through a corresponding group of the fixed grooves 602; a plurality of groups of mounting plates 603 are arranged above the bottom plate 601 at equal intervals; a plurality of groups of support columns 604 are arranged between two adjacent groups of mounting plates 603 and between the lowest group of mounting plates 603 and the bottom plate 601; the top of each set of mounting plates 603 is provided with a plurality of sets of heat dissipation through holes 605 in a rectangular array distribution; the top of each group of mounting plates 603 and the top of the bottom plate 601 are respectively provided with a plurality of groups of storage battery placing grooves 606 in a rectangular array distribution manner; a set of batteries 607 is disposed in each set of battery receiving slots 606.
The heat generated by the storage batteries 607 during operation is conducted to the air, the air is heated and expanded to rise to the top of the installation room 5 through the heat dissipation through holes 605 on the installation plate 603, and the storage batteries 607 are respectively placed in the storage battery placing grooves 606, so that the storage batteries can be quickly taken out, replaced or maintained.
The working principle of the off-grid photovoltaic energy storage inverter provided by the invention is as follows: during installation, the energy storage mechanism 6 is placed in the installation room 5, then the motor 22 is controlled to drive the second bevel gear 25 to rotate, the two groups of screw rods 20 are enabled to rotate under the meshing connection relation of the second bevel gear 25 and the first bevel gear 24, under the threaded connection relation of the two groups of screw rods 20 and the two groups of sliding blocks 21, the two groups of sliding blocks 21 drive the two groups of fixed blocks 8 to movably penetrate into the group of fixed grooves 602, thereby the energy storage mechanism 6 is fixed, heat generated by the plurality of groups of storage batteries 607 in operation is conducted into the air, the air is heated and expanded to rise to the top of the installation room 5 through the plurality of groups of heat dissipation through holes 605 on the installation board 603, the temperature sensor 12 monitors the temperature in the installation room 5, when the temperature in the installation room 5 exceeds a standard value, the heat dissipation fan 206 is started to pump out the hot air at the top of the installation room 5 through the second heat dissipation through grooves 205 and the first heat dissipation through grooves 11, the middle of the two groups of sliding blocks 203 are high and low in two sides, the heat dissipation function is matched, the waterproof effect is achieved, the air pressure of the installation room 5 is reduced, and the air pressure of the air can be pushed into the air ventilation board 10 through the heat dissipation grooves 23. When the energy storage inverter is in fire, when the smoke sensor 13 senses smoke, signals are sent to control the two groups of electric push rods 28 to drive the sealing plate 29 to rise and penetrate into the first heat dissipation through groove 11, when the air pressure in the installation chamber 5 rises to be constant with the outside, the plurality of groups of dust boards 10 rotate to the lowest position under the action of gravity, the installation chamber 5 is closed, then the electromagnetic valve 17 is controlled to be opened, dry powder in the dry powder extinguisher 18 is sprayed out through the plurality of groups of fire extinguishing spray heads 9, and fire is extinguished in the installation chamber 5.
The energy storage dc-to-ac converter can produce the heat at the during operation, and air thermal expansion can rise to the top of installing the room 5, and heat dissipation mechanism 2 installs at the top of box 1, and radiator fan 206 leads to groove 205 and first heat dissipation through the second and leads to groove 11 and take out the hot air at installing the room 5 top to discharge through the shutter 203 of both sides, not only can quick exhaust hot air, improved the radiating effect of energy storage dc-to-ac converter, still can cooperate two sets of shutters 203 through the setting of high both sides low in the middle of the heat dissipation chamber 204, improve the rain-proof effect of energy storage dc-to-ac converter.
The second bevel gear 25 is driven to rotate by the control motor 22, the two groups of screw rods 20 rotate under the meshing connection relation of the second bevel gear 25 and the first bevel gear 24, and the two groups of screw rods 20 and the two groups of sliding blocks 21 are in threaded connection relation, so that the two groups of sliding blocks 21 drive the two groups of fixing blocks 8 to movably penetrate into the two groups of fixing grooves 602, the energy storage mechanism 6 is fixed, the energy storage inverter is simpler and quicker in mounting and dismounting the energy storage mechanism 6, and the mounting convenience of the energy storage inverter is improved.
Through utilizing smog sensor 13 to monitor the smog that produces in the installation room 5 to send signal control two sets of electric putter 28 to drive closing plate 29 rise and run through to first heat dissipation logical inslot 11, when the atmospheric pressure in the installation room 5 rises to always with the external world, a plurality of sets of dust guard 10 rotate to the below under the effect of gravity for installation room 5 is sealed, then control solenoid valve 17 opens, make the dry powder in the dry powder fire extinguisher 18 spout through a plurality of sets of shower nozzle 9 of putting out a fire in the installation room 5, have improved energy storage inverter's fire behavior.
On the basis of the off-grid photovoltaic energy storage inverter, the embodiment of the invention also provides a control method for the off-grid photovoltaic energy storage inverter, and the control method comprises the following steps:
the inverter body converts direct current generated by the photovoltaic module into stable alternating current and inputs the stable alternating current into a power grid through the relay;
the voltage detector detects that the power grid voltage is abnormal;
the control relay switching circuit is used for electrically connecting the inverter body with the energy storage mechanism;
the inverter body converts direct current generated by the photovoltaic module into stable alternating current and inputs the stable alternating current into the energy storage mechanism through the relay;
the energy storage mechanism stores electric energy and becomes a new energy supply unit.
Although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. The utility model provides a photovoltaic energy storage dc-to-ac converter is incorporated into power networks from, includes box (1), its characterized in that: an installation chamber (5) is arranged in the box body (1); an inverter body (14), a relay (15) and a voltage detector (16) are arranged on the inner wall of one side of the installation chamber (5); an energy storage mechanism (6) is arranged in the mounting chamber (5); a smoke sensor (13) is arranged on the inner wall of the top of the installation chamber (5); two groups of electric push rods (28) are arranged on the inner wall of the top of the installation chamber (5); the output ends of the two groups of electric push rods (28) are in transmission connection with sealing plates (29); a first heat dissipation through groove (11) is formed in the center of the top of the mounting chamber (5); the sealing plate (29) movably penetrates through the first heat dissipation through groove (11); a heat dissipation mechanism (2) is arranged at the top of the box body (1); a plurality of groups of fire extinguishing spray heads (9) are respectively arranged on the inner walls of the two sides of the installation chamber (5) perpendicular to the opening at equal intervals along the vertical direction; two side walls of the box body (1) perpendicular to the box door (4) are respectively provided with a group of fireproof boxes (3); a group of dry powder fire extinguishers (18) are arranged in each group of fireproof boxes (3); a group of electromagnetic valves (17) are arranged on the inner wall of one side of each group of fireproof boxes (3) close to the installation chamber (5); two ends of each group of electromagnetic valves (17) are respectively communicated with a group of corresponding dry powder fire extinguishers (18) and a plurality of groups of fire extinguishing spray heads (9); a ventilation through groove (23) is formed in the inner wall of one side, far away from the opening, of the bottom of the installation chamber (5); one end of the ventilation through groove (23) far away from the installation chamber (5) is provided with a dust screen (26); a plurality of groups of dust-proof plates (10) are sequentially hinged in the ventilation through groove (23) at equal intervals along the vertical direction; the dust-proof plates (10) are movably abutted together in sequence; a plurality of groups of limiting rods (27) are arranged in the ventilation through grooves (23) at equal intervals along the vertical direction; the limiting rods (27) are positioned on one side of the dust-proof plate (10) far away from the installation chamber (5); each group of dust-proof plates (10) is movably abutted against one side wall of a corresponding group of limiting rods (27); two groups of sliding grooves (7) are symmetrically formed in the inner wall of the bottom of the mounting chamber (5); a group of fixed blocks (8) are slidably connected in each group of sliding grooves (7); an adjusting cavity (19) is arranged in the bottom of the mounting chamber (5); the adjusting cavity (19) is communicated with the two groups of sliding grooves (7); two groups of screw rods (20) are arranged in the adjusting cavity (19) along the sliding direction of the fixed block (8); one ends of the two groups of screw rods (20) are fixedly connected, and the other ends of the screw rods are respectively and rotatably connected to the inner walls of the two sides of the adjusting cavity (19); the thread directions of the two groups of screw rods (20) are opposite, and the central axes of the screw rods are on the same straight line; two groups of sliding blocks (21) are connected to the inner wall of the bottom of the adjusting cavity (19) in a sliding manner; the two groups of sliding blocks (21) are respectively in threaded connection with one group of screw rods (20); the two groups of sliding blocks (21) are respectively connected with one group of fixed blocks (8) in a transmission way; a first bevel gear (24) is sleeved at the joint of the two groups of screw rods (20); a motor (22) is arranged in the adjusting cavity (19); the output end of the motor (22) is in transmission connection with a second bevel gear (25); the second bevel gear (25) is in meshed connection with the first bevel gear (24).
2. An off-grid photovoltaic energy storage inverter as defined in claim 1, wherein: a temperature sensor (12) is arranged on the inner wall of the top of the installation chamber (5); the heat dissipation mechanism (2) is movably communicated with the mounting chamber (5); the inverter body (14) is electrically connected with the relay (15); the voltage detector (16) is electrically connected with the relay (15).
3. An off-grid photovoltaic energy storage inverter as defined in claim 2, wherein: the heat dissipation mechanism (2) comprises a shell (201); a plurality of groups of mounting holes (202) are formed in the top edge of the shell (201); a heat dissipation cavity (204) is formed in the shell (201); two groups of shutters (203) are symmetrically arranged on the inner walls of the two sides of the heat dissipation cavity (204).
4. An off-grid photovoltaic energy storage inverter according to claim 3, characterized in that: a second heat dissipation through groove (205) is formed in the center of the inner wall of the bottom of the heat dissipation cavity (204); the second heat dissipation through groove (205) is movably communicated with the mounting chamber (5); a cooling fan (206) is arranged in the center of the inner wall of the bottom of the cooling cavity (204).
5. An off-grid photovoltaic energy storage inverter as defined in claim 2, wherein: the energy storage mechanism (6) comprises a bottom plate (601); two groups of fixing grooves (602) are symmetrically formed in the edges of two sides of the top of the bottom plate (601); each group of the fixed blocks (8) movably penetrates through a corresponding group of the fixed grooves (602); a plurality of groups of mounting plates (603) are arranged above the bottom plate (601) at equal intervals; a plurality of groups of support columns (604) are arranged between two adjacent groups of mounting plates (603) and between the lowest group of mounting plates (603) and the bottom plate (601).
6. The off-grid photovoltaic energy storage inverter of claim 5, wherein: the top of each group of mounting plates (603) is provided with a plurality of groups of heat dissipation through holes (605) in a rectangular array distribution manner; the tops of each group of mounting plates (603) and the bottom plate (601) are respectively provided with a plurality of groups of storage battery placing grooves (606) in a rectangular array distribution manner; and a group of storage batteries (607) are arranged in each group of storage battery placing grooves (606).
7. A method of controlling an off-grid photovoltaic energy storage inverter as defined in any one of claims 1-6, characterized by: the control method comprises the following steps:
the inverter body converts direct current generated by the photovoltaic module into stable alternating current and inputs the stable alternating current into a power grid through the relay;
the voltage detector detects that the power grid voltage is abnormal;
the control relay switching circuit is used for electrically connecting the inverter body with the energy storage mechanism;
the inverter body converts direct current generated by the photovoltaic module into stable alternating current and inputs the stable alternating current into the energy storage mechanism through the relay;
the energy storage mechanism stores electric energy and becomes a new energy supply unit.
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| CN116742251B (en) * | 2023-08-16 | 2024-01-19 | 中山澳特浦光电有限公司 | Portable energy storage device and control method thereof |
| CN117097028B (en) * | 2023-10-16 | 2024-01-23 | 深圳市耐斯特能源科技有限公司 | Running state display device of bidirectional photovoltaic energy storage inverter |
| CN117715379A (en) * | 2023-12-15 | 2024-03-15 | 国网青海省电力公司清洁能源发展研究院 | Net-structured energy storage device |
| CN118367864A (en) * | 2024-04-17 | 2024-07-19 | 南自通华(南京)智能电气有限公司 | Photovoltaic energy storage charging equipment |
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