CN216312686U - Photovoltaic equipment is used at villa family - Google Patents
Photovoltaic equipment is used at villa family Download PDFInfo
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- CN216312686U CN216312686U CN202121914718.3U CN202121914718U CN216312686U CN 216312686 U CN216312686 U CN 216312686U CN 202121914718 U CN202121914718 U CN 202121914718U CN 216312686 U CN216312686 U CN 216312686U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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- 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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
Abstract
The utility model provides a photovoltaic device for villa users, comprising: the intelligent photovoltaic module, the energy storage inversion and off-grid multifunctional integrated machine, the energy storage device and the current monitoring sensing device are arranged on the intelligent photovoltaic module; the intelligent photovoltaic module array is arranged on the roof of the villa and used for realizing intelligent power output of the whole system; the energy storage inversion and off-grid multifunctional all-in-one machine is respectively connected with the intelligent photovoltaic assembly, the energy storage device and the power grid and is used for modulating voltage and controlling the system to operate according to the circuit state information transmitted by the current monitoring and sensing device. According to the utility model, the whole circuit is regulated and controlled in real time through the energy storage inversion and off-grid multifunctional integrated machine according to the circuit state information transmitted by the current monitoring and sensing device, so that the intelligent and rapid switching of the grid connection/off-grid of the photovoltaic system is realized, the power output requirement of the grid connection system under the special condition without energy storage configuration can be avoided, and the limitation of the off-grid system on the use of electric energy is broken through.
Description
Technical Field
The utility model relates to the field of photovoltaic power generation, in particular to photovoltaic equipment for villa users.
Background
With the shortage of global energy supply and the increasing environmental pollution, more and more people are aware of the importance of new energy, especially solar energy. In a new period of high-speed development of photovoltaic, wind power and energy storage, the important values of energy storage and new energy large-scale application are in common recognition, and photovoltaic becomes an absolute main energy. However, a system that uses photovoltaic power generation alone for power supply is unstable due to the limitation of lighting conditions. In addition, after large-scale grid connection, disturbance is brought to normal operation of a power grid.
In modern high-end villa decoration pursuing intellectualization and greenization, the situation of unbalanced supply and demand of a power system is aggravated because of large occupied area, more power consumption equipment and larger overall power consumption of the equipment and the sharp increase of the demand of electric quantity in winter and summer at the peak of power consumption. How to break through the defect of unstable power supply caused by the limitation of a system when an off-grid system is used independently and when a photovoltaic energy storage device is used independently is the difficulty in modernization of high-end villa decoration.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the defect of unstable power supply caused by the limitation of a system in a photovoltaic system due to the independent use of an off-grid system and the independent use of a photovoltaic energy storage device,
in order to solve the technical problems, the utility model adopts the following technical scheme;
the utility model provides a photovoltaic equipment is used at villa family, photovoltaic equipment includes at the villa family: the intelligent photovoltaic module, the energy storage inversion and off-grid multifunctional integrated machine, the energy storage device and the current monitoring sensing device are arranged on the intelligent photovoltaic module;
the intelligent photovoltaic array formed by arranging the plurality of intelligent photovoltaic module arrays is arranged on the roof of the villa so as to realize the output of electric power;
energy storage contravariant and off-grid multifunctional integrated machine includes: the system comprises a grid-connected output end, an off-grid output end, an input end and an energy storage output end; the input end is electrically connected with the intelligent photovoltaic array, the off-grid output end and the grid-connected output end are respectively connected with a low-voltage 380V power grid, an important/emergency load and a common household load, and the off-grid output end is electrically connected with the energy storage device;
the energy storage device comprises a plurality of battery modules and a management module, and is used for intelligently storing and supplying energy;
the current monitoring and sensing device is directly connected with the energy storage inversion and off-grid multifunctional all-in-one machine through a signal wire so as to be used for monitoring the working state of the whole photovoltaic power generation system and the low-voltage 380V power grid (9).
The backlight surface of each intelligent photovoltaic module is also provided with an intelligent junction box; the intelligent junction box is respectively connected with the positive electrode and the negative electrode of the outgoing line of the intelligent photovoltaic module, and an integrated circuit comprising an MPPT module and a direct current optimization module is arranged in the intelligent junction box.
The energy storage inversion and off-grid multifunctional all-in-one machine further comprises a communication port, and the communication port is directly connected with a signal port of the current monitoring and sensing device and used for acquiring working state information of the low-voltage 380V power grid.
Wherein each of the energy storage devices further comprises a plurality of energy optimizers, each of the energy optimizers coupled to a single battery module comprised of a plurality of cells.
The photovoltaic equipment is used at villa family still includes the block terminal of being incorporated into the power networks, the block terminal of being incorporated into the power networks includes first end, second end, third end, fourth end, first end with the output coupling of being incorporated into the power networks, the second end with from the coupling of net output, the third end with important/urgent load is connected, the fourth end is connected to low pressure 380V electric wire netting with general domestic load.
Further, the intelligent photovoltaic module includes: the battery comprises a battery piece, a black back plate, a black frame and a black welding strip; the battery piece arrays are arranged on the black back plate, the black frame is embedded around the black back plate, and the battery pieces are fixed on the black back plate through the black welding strips.
Furthermore, the energy storage inversion grid-connected and off-grid multifunctional all-in-one machine is respectively coupled with the grid-connected output port and the off-grid output port through a switch circuit comprising three groups of relays and is used for switching between a grid-connected working mode and an off-grid working mode according to the obtained working state information.
Has the advantages that: according to the utility model, the whole circuit is regulated and controlled in real time through the energy storage inversion grid-connected and grid-disconnected multifunctional integrated machine according to the circuit state information transmitted by the current monitoring and sensing device, so that the intelligent and rapid switching of the grid connection/grid disconnection of the photovoltaic system is realized, the power output requirement under the special condition that the pure grid connection system has no energy storage configuration can be avoided, and the limitation of the pure grid-disconnected system on the power consumption and the power consumption of the photovoltaic and the energy storage device is broken through.
Drawings
Fig. 1 is a schematic structural diagram of a photovoltaic device for a villa user according to an embodiment of the present invention;
fig. 2 is a partial schematic view of one side of an intelligent photovoltaic module according to an embodiment of the present invention;
fig. 3 is a partial schematic view of another side of an intelligent photovoltaic module according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a grid-connected mode principle provided according to an embodiment of the present invention;
FIG. 5 is a schematic diagram illustrating an off-grid mode provided in accordance with an embodiment of the present invention;
FIG. 6 is a schematic diagram of an internal module of an energy storage device according to an embodiment of the utility model;
fig. 7 is a schematic diagram of connection between an intelligent photovoltaic module and an energy storage inversion grid-connected and grid-disconnected multifunctional all-in-one machine according to an embodiment of the utility model;
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
It will be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the patent and to simplify the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be constructed in a particular manner of operation, and are not to be considered limiting of the patent.
Fig. 1 is a schematic structural diagram of a photovoltaic device for a villa user according to an embodiment of the present invention. Fig. 7 is a schematic diagram of connection between the intelligent photovoltaic module 11 and the energy storage inversion and off-grid multifunctional all-in-one machine according to the embodiment of the utility model.
Referring to fig. 1 and 7, an embodiment of the present invention provides a high-efficiency intelligent photovoltaic system structure for a high-end independent villa user, including: the intelligent photovoltaic module 11, the energy storage inversion and off-grid multifunctional integrated machine 2, the energy storage device 3 and the current monitoring sensing device 8. Wherein, each intelligent photovoltaic module 11 is formed by totally black outward appearance encapsulation, forms a set of intelligent photovoltaic array 1 through establishing ties between a plurality of intelligent photovoltaic modules 11. Every group intelligence photovoltaic array 1 is arranged at intervals and is laid in the villa roof to the electric energy that produces after with photoelectric conversion converges into energy storage contravariant and leaves input 21 of net multifunctional integrated machine 2. The energy storage inversion and off-grid multifunctional all-in-one machine 2 and the number of groups of the corresponding intelligent photovoltaic arrays 1 of different specifications are selected according to the power demand of the villa.
Energy storage contravariant and off-grid multifunctional integrated machine 2 is equipped with at least: the system comprises an input end 21, a grid-connected output end 22, an off-grid output end 23 and an energy storage output end 24. The input end 21 is connected with a circuit for collecting lines output by the intelligent photovoltaic module 11, and the grid-connected output end 22 and the off-grid output end 23 are respectively connected with a low-voltage 380V power grid 9, a common household load 7 and an important/emergency load 6. In addition, the energy storage output end 24 is connected with the energy storage device 3, and under the condition that the power generation is sufficient, the energy storage inversion and off-grid multifunctional all-in-one machine 2 controls a part of electric energy to flow into the energy storage device 3. When the internal electric energy of the energy storage battery is insufficient, the energy storage inversion and off-grid multifunctional integrated machine 2 adjusts the circuit, and in a time period with lower electric charge, current is introduced from the low-voltage 380V power grid 9 to charge the energy storage device 3.
In addition, the energy storage inversion and off-grid multifunctional all-in-one machine 2 is also internally provided with a communication port 25 which is connected with a signal port 81 of the current monitoring and sensing device 8.
Wherein, the input 21 of energy storage contravariant and multifunctional integrated machine 2 of leaving the net can be a plurality ofly, and every input 21 is connected with a set of intelligent photovoltaic array 1 for satisfy different power generation demands.
Fig. 2 is a partial schematic view of one side of an intelligent photovoltaic module 11 according to an embodiment of the present invention. Fig. 3 is a partial schematic view of another surface of an intelligent photovoltaic module 11 according to an embodiment of the present invention.
Referring to fig. 2 and 3 together, the all-black appearance package of the intelligent photovoltaic module 11 includes: battery piece 114, black back plate 111, black frame 112, black solder strip 113. The cell sheet 114 is fixed to the surface of the black back plate 111, which is irradiated by sunlight, by the black solder tape 113. The black frame 112 is fitted around the black back plate 111, thereby forming a completely black appearance in the package.
Further, in another embodiment of the present invention, an intelligent junction box 115 is further fixed on a surface of the black back plate 111 of each intelligent photovoltaic module 11, which is not irradiated by sunlight, the outside of the intelligent junction box 115 is respectively connected to the positive electrode and the negative electrode of the outgoing line of the intelligent photovoltaic module 11, and an integrated circuit including an MPPT module (i.e., a maximum power optimization module) and a dc optimization module is arranged inside the intelligent junction box 115. The intelligent junction box 115 monitors and adjusts the voltage and the current of the corresponding intelligent photovoltaic modules 11 in real time through the internal MPPT module, so that the matching difference between the intelligent photovoltaic modules 11 is reduced, and the purpose of optimal power generation is achieved. In addition, when the intelligent photovoltaic module 11 at the roof has a linear arc discharge phenomenon, the artificial intelligent maximum power optimization module algorithm inside the energy storage inversion and off-grid multifunctional integrated machine 2 quickly analyzes the arc fault and positions the intelligent photovoltaic module 11 with the fault, and controls the corresponding intelligent junction box 115 to quickly shut down and cut off the power supply, so that the array formed by the whole intelligent photovoltaic module 11 is protected.
Fig. 6 is a schematic diagram of internal modules of the energy storage device 3 according to an embodiment of the present invention.
Referring to fig. 5, further, the energy storage device 3 in another embodiment of the present invention adopts a design that the management module 31 is integrated with a battery, and the battery is a ternary lithium (i.e. nickel cobalt lithium manganate, LiNiCoMn) battery. Each battery module 32 is formed by connecting a plurality of cells 34 in series or in parallel to form a combination and coupled to an energy optimizer 33. Each battery module 32 is individually optimized by an internal energy optimizer 33 to ensure that the cells 34 operate stably for a long time and to optimize the power output of each battery module 32. A plurality of battery modules 32 are coupled to a management module 31, forming the entire energy storage device 3.
The management module 31 is responsible for intelligent management and maintenance of the battery module 32 to prevent overcharge and overdischarge conditions, thereby extending the service life of the battery module 32. The energy storage device can be matched and expanded flexibly according to different application energy storage requirement scenes, and the energy optimizer 33 arranged in each battery module 32 can be used for carrying out independent charging and discharging management on the corresponding battery module 32. In addition, the battery module 32 can support the mix of new and old battery packs to achieve the effect of fully releasing the potential of each battery.
When the current monitoring and sensing device 8 monitors that the low-voltage 380V power grid 9 normally operates, the working state of the whole system is in a grid-connected state; when the current monitoring and sensing device 8 monitors that the low-voltage 380V power grid 9 is powered off, the energy storage inversion and off-grid multifunctional integrated machine 2 rapidly switches the working state of the whole system into off-grid connection.
Fig. 4 is a schematic diagram of a grid-connected mode principle provided according to an embodiment of the present invention, and fig. 5 is a schematic diagram of an off-grid mode principle provided according to an embodiment of the present invention.
Referring to fig. 4 and 5, in an embodiment of the present invention, a switch circuit including three sets of relays is disposed in the energy storage inversion and off-grid multifunctional all-in-one machine 2. When the first relay 26 and the second relay 27 are closed and the third relay 28 is opened, the grid-connected output end 22 of the energy storage inversion grid-connected all-in-one machine is connected with the photovoltaic system, and the whole system is in a grid-connected state.
When the low-voltage 380V power grid 9 is powered off, the first relay 26 and the second relay 27 are disconnected, meanwhile, the third relay 28 is closed, the energy storage inversion grid-connected integrated machine is connected with the off-grid output end 23, the whole system is in an off-grid state, and the energy storage device 3 supplies power to a load. The working mode switching of the energy storage inversion grid-connected all-in-one machine automatically judges the running state of a power grid and the current direction of a system grid-connected end by monitoring the working state information of a low-voltage 380V power grid 9 in real time through an intelligent current monitoring and sensing device 8, and when the low-voltage 380V power grid 9 is powered off or the system current is reversely transmitted to the low-voltage 380V power grid 9, signals are transmitted to the energy storage inversion grid-connected all-in-one machine 2 at the first time, and then the grid-connected and off-grid working mode switching is carried out.
The energy storage inversion and off-grid multifunctional all-in-one machine 2 adjusts the working state and the working mode of the whole system according to the circuit working state information transmitted from the signal port 81 of the current monitoring and sensing device 8, and the working state information includes but is not limited to: the running state of the low-voltage 380V power grid 9 end, the current direction of the whole system and the like.
The working state of the whole system is as follows: and a spontaneous self-use mode and a redundant photovoltaic energy charging priority mode are maximized.
When the photovoltaic power generation capacity is insufficient or no photovoltaic power generation is carried out at night, the energy storage inversion and off-grid multifunctional integrated machine 2 adjusts the working state of the whole system to be in a maximum spontaneous self-use mode. In this mode, the energy storage device 3 discharges to supply the load with electricity, thereby achieving the effects of improving the self-generating rate of the photovoltaic system and the self-sufficiency rate of the household energy, and saving the expenditure of electric charges.
In addition, under this operating condition, when photovoltaic system generated energy was sufficient for load consumption, photovoltaic intelligence photovoltaic module 11 converted light energy into electric energy, carried to energy storage contravariant and off-grid multifunctional integrated machine 2 through the direct current cable. The energy storage inversion and off-grid multifunctional integrated machine 2 inverts a part of electric energy from direct current into alternating current according to the requirements of a control system and outputs the alternating current, and the other part of electric energy directly flows to the energy storage device 3 through a cable to be stored. The energy storage inversion grid-connected and grid-disconnected multifunctional integrated machine 2 outputs alternating currents to a load and a low-voltage 380V power grid 9 respectively. At this time, the priority of the electric power output by the photovoltaic system is the load, the energy storage device 3 and the power grid in sequence. When the generated energy of the photovoltaic system is not enough for the load to be consumed, the priority level of the power supplied to the load by the photovoltaic system is the intelligent photovoltaic module 11, the energy storage device 3 and the low-voltage 380V power grid 9 in sequence.
When the photovoltaic power configuration of the system is small, the photovoltaic power generation is insufficient for energy storage and charging in daytime, and the energy storage device 3 needs to be charged by superposing a power grid at a low-electricity-price period at night, the energy storage inversion and off-grid multifunctional all-in-one machine 2 adjusts the working state of the whole system to be in a redundant photovoltaic energy charging priority mode. In this operating state, the system first stores the excess (with respect to the load) energy of the photovoltaic power generation in the energy storage device 3. When the photovoltaic power generation is insufficient or no photovoltaic power generation is carried out at night, the energy storage device 3 discharges electricity for general household loads to use 7, so that the effects of improving the self-generating rate of a photovoltaic system and the self-sufficiency rate of household energy and saving the expenditure of electric charges are achieved.
In addition, in the operation working state, the system work is divided into a charging period, a discharging period and other periods according to the actual situation;
in the charging period, according to the maximum charging power allowed by the power grid, the priority for charging the energy storage device 3 is the intelligent photovoltaic module 11 and the low-voltage 380V power grid 9 in sequence; the intelligent photovoltaic module 11 supplies power to the outside with the energy storage device 3, the load and the low-voltage 380V power grid 9 in sequence;
the energy storage in the discharging period allows discharging to a common household load 7, and the energy source priorities of the common household load 7 are an intelligent photovoltaic module 11, an energy storage device 3 and a low-voltage 380V power grid 9 in sequence; the energy release priority of the intelligent photovoltaic module 11 is sequentially the load, the energy storage device 3 and the low-voltage 380V power grid 9;
energy storage is not charged from the power grid and is not allowed to discharge in other periods, the energy storage is charged preferentially when the illumination is sufficient, the priority of load energy is the intelligent photovoltaic module 11 and the power grid in sequence, and the priority of energy release of the intelligent photovoltaic module 11 is the common household load 7, the energy storage device 3 and the low-voltage 380V power grid 9 in sequence.
Further, in an embodiment of the present invention, the energy storage inversion and grid-disconnection multifunctional all-in-one machine 2 is connected to the low-voltage 380V power grid 9 through a grid-connected distribution box 4, one side of the grid-connected distribution box 4 is respectively connected to a grid-connected output end 22 and a grid-disconnected output end 23 of the energy storage inversion and grid-disconnection multifunctional all-in-one machine 2, and the other side of the grid-connected distribution box 4 is respectively connected to the important/emergency load 6 and the low-voltage 380V power grid 9, wherein the circuit branch connected to the low-voltage 380V power grid 9 is connected to the common household load 7 through the household distribution main switch 5.
After the electric energy generated by the intelligent photovoltaic module 11 is changed into alternating current from direct current at the energy storage inversion and off-grid multifunctional integrated machine 2, the alternating current is subjected to voltage regulation treatment through the grid-connected distribution box 4. The grid-connected distribution box 4 comprises a first end, a second end, a third end and a fourth end, wherein the first end is coupled with the grid-connected output end 22, the second end is coupled with the off-grid output end 23, the third end is connected with the important/emergency load 6, and the fourth end is connected with the low-voltage 380V power grid 9 and the common household load 7.
When the grid-connected distribution box 4 works, the voltage flowing into a load end is modulated into 220V/380V alternating current; the low-voltage 380V power grid 9 is modulated into 380V alternating current. After a part of current flowing into a system from a low-voltage 380V power grid 9 passes through a grid-connected distribution box 4, the grid-connected distribution box 4 modulates 380V alternating current into 220V alternating current to charge an energy storage device 3, and the other part of the current is directly output to a common household load 7 in a single-phase mode through a household distribution main switch 5 to supply power. When the power grid is powered off, the grid-connected distribution box 4 regulates the voltage in the energy storage device 3 to 220V/380V for supplying power.
In addition, a plurality of circuit control switches are arranged in the grid-connected distribution box 4, so that the opening and closing of each circuit in the system can be intelligently or manually controlled, and when the circuit is overloaded, has a short-circuit fault or is strongly interfered by the outside world, the circuit is automatically disconnected or the current is guided, thereby ensuring the safety of each device and load of the whole circuit.
In summary, according to the embodiment of the utility model, the photovoltaic device for the villa user regulates and controls the whole circuit in real time under the control of the energy storage inversion grid-connected and grid-disconnected multifunctional all-in-one machine according to the circuit state information transmitted by the current monitoring and sensing device, so that the intelligent and rapid switching of the grid connection/grid disconnection of the photovoltaic system is realized, the power output requirement of the pure grid connection system under the special condition without energy storage configuration can be avoided, and the limitation of the photovoltaic and energy storage device of the pure grid-disconnected system on the power consumption and the power consumption is broken through. Furthermore, the embodiment of the utility model uses the intelligent photovoltaic module with the front face having no shielding and full black appearance, the conversion efficiency is high, and more installation capacity can be achieved under the same installation area. Furthermore, the energy storage device provided by the embodiment of the utility model adopts the ternary lithium battery core, the energy optimizer is arranged in each battery pack, and independent charging and discharging management is realized, so that the mixed use of new and old battery packs can be supported, and the potential of each battery can be fully released.
The foregoing description has described certain embodiments of this invention. Other embodiments are within the scope of the following claims.
The terms "exemplary," "example," and the like, as used throughout this specification, mean "serving as an example, instance, or illustration," and do not mean "preferred" or "advantageous" over other embodiments. The detailed description includes specific details for the purpose of providing an understanding of the described technology. However, the techniques may be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form in order to avoid obscuring the concepts of the described embodiments.
Alternative embodiments of the present invention are described in detail with reference to the drawings, however, the embodiments of the present invention are not limited to the specific details in the above embodiments, and within the technical idea of the embodiments of the present invention, many simple modifications may be made to the technical solution of the embodiments of the present invention, and these simple modifications all belong to the protection scope of the embodiments of the present invention.
The previous description of the disclosure is provided to enable any person skilled in the art to make or use the disclosure. Various modifications to the disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other variations without departing from the scope of the disclosure. Thus, the description is not intended to be limited to the examples and designs described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. The utility model provides a photovoltaic equipment is used at villa family which characterized in that, photovoltaic equipment includes for the villa family: the intelligent photovoltaic module (11), the energy storage inversion and off-grid multifunctional all-in-one machine (2), the energy storage device (3) and the current monitoring sensing device (8);
the intelligent photovoltaic array (1) formed by arranging a plurality of intelligent photovoltaic modules (11) in an array mode is arranged on the roof of the villa so as to achieve the output of electric power;
energy storage contravariant and off-grid multifunctional integrated machine (2) include: a grid-connected output end (22), an off-grid output end (23), an input end (21) and an energy storage output end (24); the input end (21) is electrically connected with the intelligent photovoltaic array (1), the off-grid output end (23) and the grid-connected output end (22) are respectively connected to a low-voltage 380V power grid (9), a general household load (7) and an important/emergency load (6), and the energy storage output end (24) is electrically connected with the energy storage device (3);
the energy storage device (3) comprises a plurality of battery modules (32) and a management module (31) which are used for intelligently storing and supplying energy;
the current monitoring and sensing device (8) is directly connected with the energy storage inversion and off-grid multifunctional all-in-one machine (2) through a signal wire so as to be used for monitoring the working state of the whole photovoltaic power generation system and the low-voltage 380V power grid (9).
2. The villa-user photovoltaic device as recited in claim 1, wherein the backlight surface of each intelligent photovoltaic module (11) is further provided with an intelligent junction box (115); the intelligent junction box (115) is connected with the positive electrode and the negative electrode of an outgoing line of the intelligent photovoltaic module (11) respectively, and an integrated circuit comprising an MPPT module and a direct current optimization module is arranged in the intelligent junction box (115).
3. The villa user photovoltaic device of claim 2, wherein the intelligent photovoltaic module (11) comprises: the battery comprises a battery piece (114), a black back plate (111), a black frame (112) and a black welding strip (113); the battery pieces (114) are arranged on the black back plate (111) in an array mode, the black frame (112) is embedded on the periphery of the black back plate (111), and the battery pieces (114) are fixed on the black back plate (111) through the black welding strips (113).
4. The villa user photovoltaic equipment as claimed in claim 1, wherein the energy storage inversion and off-grid multifunctional all-in-one machine (2) further comprises a communication port (25), and the communication port (25) is directly connected with a signal port (81) of the current monitoring and sensing device (8) and is used for acquiring the working states of the whole photovoltaic power generation system and the low-voltage 380V power grid (9).
5. The villa user photovoltaic equipment as claimed in claim 4, characterized in that the energy storage inversion grid-connected and off-grid multifunctional all-in-one machine (2) is respectively coupled with the grid-connected output end (22) port and the off-grid output end (23) port through a switch circuit comprising three groups of relays, so as to switch between a grid-connected working mode and an off-grid working mode according to the obtained working state information.
6. The villa user photovoltaic apparatus as defined in claim 1, characterized in that each energy storage device (3) further comprises a plurality of energy optimizers (33), each energy optimizer (33) being coupled to a single battery module (32) consisting of a plurality of cells (34).
7. The villa user photovoltaic device as claimed in any one of claims 1 to 6, further comprising a grid-connected distribution box (4), wherein the grid-connected distribution box (4) comprises a first end, a second end, a third end and a fourth end, the first end is coupled with the grid-connected output end (22), the second end is coupled with the off-grid output end (23), the third end is connected with the important/emergency load (6), and the fourth end is connected to the low-voltage 380V grid (9) and the general household load (7).
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| CN202121914718.3U CN216312686U (en) | 2021-08-16 | 2021-08-16 | Photovoltaic equipment is used at villa family |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115663906A (en) * | 2022-12-26 | 2023-01-31 | 安徽大恒新能源技术有限公司 | Household power station based on micro-unit system |
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2021
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115663906A (en) * | 2022-12-26 | 2023-01-31 | 安徽大恒新能源技术有限公司 | Household power station based on micro-unit system |
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