CN214674376U

CN214674376U - Solar power supply system

Info

Publication number: CN214674376U
Application number: CN202120477381.8U
Authority: CN
Inventors: 康飞
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-03-04
Filing date: 2021-03-04
Publication date: 2021-11-09
Anticipated expiration: 2031-03-04

Abstract

The utility model belongs to the technical field of solar power supply, and discloses a solar power supply system, which comprises a plurality of solar cell panels, a plurality of micro inverters, a distribution box, an energy storage converter, a storage battery, a first data acquisition and analysis module, a second data acquisition and analysis module, a server and a mobile terminal; the utility model improves the conversion efficiency of the whole system by equipping each solar cell panel with a micro inverter; first data acquisition analysis module is connected with the battery, but the operating condition of real time monitoring battery, second data acquisition analysis module is connected with solar cell panel, but the operating condition of each solar cell panel of real time monitoring, arbitrary solar cell panel breaks down the homoenergetic and is effectively discerned, be connected first data acquisition analysis module and second data acquisition analysis module and server communication simultaneously for mobile terminal accessible server is long-range to the running state of system monitor and management.

Description

Solar power supply system

Technical Field

The utility model belongs to the technical field of the solar energy power supply, concretely relates to solar energy power supply system.

Background

In recent years, with the development of the photovoltaic industry, the production cost of a photovoltaic system is reduced, the technical application is mature day by day, and the photovoltaic energy becomes the clean renewable energy with the most development potential, so the research and development of photovoltaic power generation in countries around the world have been raised to the strategic height. The photovoltaic system can be applied to various fields such as life, production, natural disaster emergency, military and the like, provides power for various occasions without electricity or lack of electricity, is a power supply system with very wide application, has the advantages of environmental protection, sustainable development, high use value and the like, and has very good development prospect.

In a conventional solar power supply system, a plurality of solar panels are connected in series and connected to a dc input terminal of a photovoltaic inverter, and after inversion, electric energy is transmitted to a grid. However, this method has the problem that when one series solar panel is shaded by shadow or uneven illumination, the electric energy collection efficiency of the branch of the series is reduced, and the power of the whole output is reduced. Meanwhile, the solar cell panel and the storage battery are used as key components in the solar power supply system, effective and comprehensive monitoring and management of the solar cell panel and the storage battery are lacked in the prior art, the mobile terminal cannot monitor the working states of the solar cell panel and the storage battery in a remote and real-time manner, and meanwhile, the damaged or failed solar cell panel cannot be positioned in a photovoltaic matrix formed by a plurality of solar cell panels quickly and effectively.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving above-mentioned technical problem.

Therefore, the utility model aims to provide a solar energy power supply system of reliable performance can realize improving the power supply efficiency of system when battery and each solar cell panel real time monitoring management.

The utility model discloses the technical scheme who adopts does:

a solar power supply system comprises a plurality of solar panels, a plurality of micro inverters, a distribution box, an energy storage converter, a storage battery, a first data acquisition and analysis module, a second data acquisition and analysis module, a server and a mobile terminal, the number of the solar cell panels is the same as that of the micro inverters, the output end of each solar cell panel is electrically connected with the input end of the corresponding micro inverter, the output end of each solar cell panel is also electrically connected with the second data acquisition and analysis module, the output end of each micro inverter is connected with the distribution box, the distribution box is electrically connected with a storage battery through an energy storage converter, the storage battery is electrically connected with a first data acquisition and analysis module, the first data acquisition and analysis module and the second data acquisition and analysis module are in communication connection with a server, and the server is in communication connection with the mobile terminal.

Further, the first data acquisition and analysis module comprises a first voltage acquisition circuit, a first current acquisition circuit, a first wireless communication module and a first controller; the first voltage acquisition circuit, the first current acquisition circuit and the first wireless communication module are all electrically connected with the first controller, the first voltage acquisition circuit and the first current acquisition circuit are also all electrically connected with the storage battery, and the first wireless communication module is in communication connection with the server.

Furthermore, the second data acquisition and analysis module comprises a second voltage acquisition circuit, a second current acquisition circuit, a second wireless communication module and a second controller; the second voltage acquisition circuit, the second current acquisition circuit and the second wireless communication module are electrically connected with the first controller, the second voltage acquisition circuit and the second current acquisition circuit are electrically connected with the output end of the solar cell panel, and the second wireless communication module is in communication connection with the server.

Further, the micro inverter comprises a direct current conversion module, an MPPT control module and an inversion module, the MPPT control module, the inversion module and the solar cell panel are electrically connected with the direct current conversion module, and the inversion module is electrically connected with the distribution box.

Furthermore, the solar power supply system also comprises a plurality of DC-DC converters, the number of the DC-DC converters is the same as that of the solar panels, and each solar panel is electrically connected with the corresponding micro inverter through different DC-DC converters.

Further, the solar power supply system further comprises an electric quantity display module, and the electric quantity display module is electrically connected with the first data acquisition and analysis module.

Furthermore, the energy storage converter comprises a DC/AC bidirectional converter, a control unit and a CAN interface, the DC/AC bidirectional converter is electrically connected with the distribution box, the storage battery and the control unit respectively, and the control unit is in communication connection with the first data acquisition and analysis module through the CAN interface.

Further, the solar power supply system further comprises a mains supply power grid and a user load, and the mains supply power grid and the user load are both electrically connected with the distribution box.

Furthermore, the block terminal is equipped with collector and arrester, the inlet wire end of collector is connected with micro-inverter's output electricity, the leading-out terminal of collector is connected with commercial power electric wire netting and user load electricity respectively, the high-voltage terminal of arrester is connected with the inlet wire end of collector electricity, the low pressure end of arrester is connected with the monitor.

Further, the block terminal is equipped with a plurality of operation pilot lamp, the quantity of operation pilot lamp is the same with solar cell panel, and every operation pilot lamp corresponds with the output of the miniature inverter of difference and is connected, operation pilot lamp is used for showing the operating condition who corresponds solar cell panel.

The utility model has the advantages that:

the utility model provides a solar power supply system, which is characterized in that each solar panel is provided with a micro inverter, so that the system works at the maximum power point, even if one micro inverter fails, the energy conversion of other solar panels can still be carried out, and the stability and the conversion efficiency of the whole system are improved; the utility model provides a first data acquisition analysis module is connected with the battery, but the operating condition of real time monitoring battery, second data acquisition analysis module is connected with solar cell panel, but the operating condition of every solar cell panel of real time monitoring, arbitrary solar cell panel breaks down the homoenergetic and is effectively discerned, be connected first data acquisition analysis module and second data acquisition analysis module and server communication simultaneously for mobile terminal accessible server is long-range to the running state of system monitor and management.

Other advantageous effects of the present invention will be described in detail in the detailed description of the invention.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of the first data acquisition and analysis module, the storage battery and the server.

Fig. 3 is a schematic structural diagram of a second data acquisition and analysis module, a solar panel and a server.

Fig. 4 is a schematic structural view of the micro-inverter, the solar panel, and the distribution box.

In the figure: 1-a solar panel; 2-a micro-inverter; 201-a direct current conversion module; 202-MPPT control module; 203-an inversion module; 3-a distribution box; 4-mains electricity grid; 5-user load; 6-energy storage converter; 7-a storage battery; 8-a first data acquisition and analysis module; 801-a first voltage acquisition circuit; 802-a first current acquisition circuit; 803 — first controller; 804-a first wireless communication module; 9-a second data acquisition and analysis module; 901-a second voltage acquisition circuit; 902-a second current acquisition circuit; 903 — a second controller; 904-a second wireless communication module; 10-a server; 11-a mobile terminal; 12-DC-DC converter.

Detailed Description

The technical solution provided by the present invention will be described in detail by way of embodiments with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto.

In some instances, some embodiments are not described or not in detail, as they are conventional or customary in the art.

Furthermore, the technical features described herein, or the steps of all methods or processes disclosed, may be combined in any suitable manner in one or more embodiments, in addition to the mutually exclusive features and/or steps. It will be readily appreciated by those of skill in the art that the order of the steps or operations of the methods associated with the embodiments provided herein may be varied. Any order in the drawings and examples is for illustrative purposes only and does not imply that a certain order is required unless explicitly stated to be required.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The terms "connected" and "coupled" when used in this application, encompass both direct and indirect connections (and couplings) where appropriate and where not necessary contradictory.

Example 1

As shown in fig. 1, the present embodiment provides a solar power supply system, which includes a plurality of solar panels 1, a plurality of micro inverters 2, a distribution box 3, an energy storage converter 6, a storage battery 7, a first data acquisition and analysis module 8, a second data acquisition and analysis module 9, a server 10 and a mobile terminal 11, where the number of the solar panels 1 is the same as that of the micro inverters 2, an output end of each solar panel 1 is electrically connected to an input end of the corresponding micro inverter 2, an output end of each solar panel 1 is also electrically connected to the second data acquisition and analysis module 9, and the second data acquisition and analysis module 9 is used for monitoring an operating state of each solar panel 1 in real time; the output end of each micro inverter 2 is connected to a distribution box 3, the distribution box 3 is also electrically connected with a storage battery 7 through an energy storage converter 6, the electric energy converted from the solar panel 1 is stored in the storage battery 7, and the storage battery 7 as a standby power supply can be put into use when the system power is insufficient or the commercial power is cut off; the storage battery 7 is also electrically connected with a first data acquisition and analysis module 8, and the first data acquisition and analysis module 8 is used for monitoring the working state of the solar panel 1 in real time; meanwhile, the first data acquisition and analysis module 8 and the second data acquisition and analysis module 9 are both in communication connection with the server 10, and the server 10 is used for being in communication connection with the mobile terminal 11.

According to the solar power supply system provided by the embodiment, each solar panel 1 is provided with the micro inverter 2, so that the system works at the maximum power point, even if one micro inverter 2 fails, the energy conversion of other solar panels 1 can still be performed, the stability and the conversion efficiency of the whole system are improved, and the problem that when one series-connected solar panel is shaded by shadows or uneven illumination is solved, the electric energy collection efficiency of the series-connected solar panel is reduced along with the reduction of the electric energy collection efficiency of the series-connected solar panel; meanwhile, the first data acquisition and analysis module 8 is connected with the storage battery 7, the working state of the storage battery 7 can be monitored in real time, the second data acquisition and analysis module 9 is connected with the solar cell panel 1, the working state of each solar cell panel 1 can be monitored in real time, any solar cell panel 1 can be effectively identified when a fault occurs, the first data acquisition and analysis module 8 and the second data acquisition and analysis module 9 are in communication connection with the server 10, and the mobile terminal 11 can remotely monitor and manage the system through the server 10.

In this embodiment, as shown in fig. 2, the first data collecting and analyzing module 8 includes a first voltage collecting circuit 801, a first current collecting circuit 802, and a first controller 803; the first voltage acquisition circuit 801 and the first current acquisition circuit 802 are both electrically connected with the storage battery 7, and the first voltage acquisition circuit 801 and the first current acquisition circuit 802 are used for acquiring state information of the storage battery 7; the first controller 803 is electrically connected to the first voltage acquisition circuit 801 and the first current acquisition circuit 802, respectively, and the first controller 803 is configured to analyze, receive, process, and store state information of the battery 7, where in this embodiment, the first controller 803 may manage charging and discharging of the storage battery 7, that is, determine a charging mode (direct charging or PWM (pulse width modulation) charging) according to a voltage of the storage battery 7, and automatically stop charging when the storage battery 7 reaches a full-charge threshold; adjusting the full charge threshold value according to the ambient temperature of the storage battery 7; the discharge is automatically stopped when the battery 7 falls to the undervoltage threshold. As a preferred embodiment, the model of the first controller 803 is C8051F330, and the C8051F330 is a fully integrated mixed signal system on a chip MCU (micro control unit), a CIP-51 core with a built-in high-speed pipeline structure, a 768-byte on-chip RAM, and 8KB FLASH memory capable of being programmed in a system, 17I/O ports, 4 general-purpose 16-bit timers, a programmable counter/timer array (PCA), and other digital resources. Therefore, the MCU can fully meet the use requirement of the embodiment. Further, a MOSFET (metal-oxide semiconductor field effect transistor) is used to control charging and discharging of the secondary battery 7. When the storage battery 7 is charged, the grid electrode of the charging MOSFET for controlling the charging of the storage battery 7 is controlled by an I/O port of the first controller 803, when the voltage of the storage battery 7 is lower than a direct charging threshold value, the first controller 803 skips PCA and directly outputs a high level signal to turn on the charging MOSFET, so that the solar panel 1 uninterruptedly charges the storage battery 7, and after the voltage of the storage battery 7 exceeds the direct charging threshold value, the first controller 803 receives the PCA and changes the charging mode into the PWM mode for charging. The charging pulse width gradually narrows along with the rise of the voltage of the storage battery 7, after the charging pulse width reaches the upper charging limit, the PCA is skipped again, a low level is output, and the charging is completely cut off; when the storage battery 7 is discharged, the grid electrode of the discharging MOSFET for controlling the discharging of the storage battery 7 is controlled by the other I/O port of the first controller 803, when the voltage of the storage battery 7 is lower than the undervoltage threshold value, the first controller 803 outputs a turn-off signal to stop the discharging, and when the voltage is higher than the recovery threshold value, the turn-on signal is output.

In this embodiment, as shown in fig. 3, the second data collecting and analyzing module 9 includes a second voltage collecting circuit 901, a second current collecting circuit 902, and a second controller 903; the second voltage acquisition circuit 901 and the second current acquisition circuit 902 are both electrically connected with the output end of the solar panel 1 and are used for acquiring the state information of the solar panel 1; the second controller 903 is electrically connected to the second voltage collecting circuit 901 and the second current collecting circuit 902, the second controller 903 is configured to receive, process and store state information of the solar panel 1, as a preferred scheme, the model of the second controller 903 is C8051F330, specifically, when the second controller 903 analyzes and processes the state information of the solar panel 1, the second controller 903 records the state information according to different groups of the solar panel 1, when the collected data of one solar cell panel 1 is abnormal, the data of the adjacent solar cell panel 1 is compared, and when the duration time of the abnormal data exceeds a set time threshold, the solar cell panel 1 is judged to be in fault, and the fault information is uploaded to the server 10, so that the comprehensive data of the solar cell panel 1 is ensured, and meanwhile, the fault is conveniently checked and recorded.

In this embodiment, as shown in fig. 2 and 3, the first data collecting and analyzing module 8 further includes a first wireless communication module 804, the first data collecting and analyzing module 8 is in communication connection with the server 10 through the first wireless communication module 804, and the first data collecting and analyzing module 8 is configured to upload the state information of the storage battery 7; the second data acquisition and analysis module 9 further comprises a second wireless communication module 904, the second data acquisition and analysis module 9 is in communication connection with the server 10 through the second wireless communication module 904, the second data acquisition and analysis module 9 is used for uploading state information of the solar cell panel 1, and the mobile terminal 11 can remotely monitor and manage the system through the server 10.

In this embodiment, as shown in fig. 4, the micro inverter 2 includes a dc conversion module 201, an MPPT control module 202, and an inverter module 203, the MPPT control module 202, the inverter module 203, and the solar panel 1 are all electrically connected to the dc conversion module 201, and the inverter module 203 is electrically connected to the distribution box 3. The MPPT control module 202 is configured to adjust the solar panel 1 to maintain an optimal working efficiency, and specifically, the MPPT control module 202 calculates an output power of a photovoltaic array formed by the solar panel 1 by detecting a main loop dc voltage and an output current of the micro inverter 2, so as to track a maximum power point.

In this embodiment, the solar power supply system further includes a plurality of DC-DC converters 12, the number of the DC-DC converters 12 is the same as that of the solar panels 1, each solar panel 1 is electrically connected to the corresponding micro-inverter 2 through a different DC-DC converter 12, as a preferred scheme, the DC-DC converter 12 is a buck-boost DC/DC converter, and the solar panels 1 output stable voltage through the DC-DC converter 12 under different illumination intensities, so as to improve the power performance output by the solar panels 1.

In this embodiment, the solar power supply system further includes a utility power grid 4 and a user load 5, both the utility power grid 4 and the user load 5 are electrically connected to the distribution box 3, it should be noted that, when the solar power supply system normally operates, under the action of the micro inverter 2, the system operates at a maximum power point, and on the premise of meeting the power requirement of the user load 5, the redundant electric quantity is stored in the storage battery 7 through the energy storage converter 6; when the solar power supply system is shut down due to accident, the utility power grid 4 directly supplies power to the user load 5; when the power of the solar power supply system is insufficient and the commercial power grid 4 is powered off, the energy stored in the storage battery 7 is provided for the user load 5. It should be further explained in this embodiment that the energy storage converter 6 includes a DC/AC bidirectional converter, a control unit and a CAN interface, the DC/AC bidirectional converter is electrically connected to the distribution box 3, the storage battery 7 and the control unit respectively, the control unit is in communication connection with the first data acquisition and analysis module 8 through the CAN interface, specifically, the control unit receives a control instruction from a user through the CAN interface, and controls the DC/AC bidirectional converter to realize adjustment of charging or discharging of the storage battery 7 according to the control instruction. The energy storage converter 6 is in communication connection with the first data acquisition and analysis module 8 through the CAN interface, so that the state information of the storage battery 7 is acquired, the protective charging and discharging of the storage battery 7 CAN be realized, and the running safety of the battery is ensured.

In this embodiment, the solar power supply system further includes an electric quantity display module, the electric quantity display module is electrically connected to the first data acquisition and analysis module 8, and converts the voltage and current information acquired by the first data acquisition and analysis module 8 into electric quantity information of the storage battery 7, so that a user can conveniently check the electric quantity information; in this embodiment, block terminal 3 is equipped with collector and arrester, the inlet wire end of collector is connected with micro-inverter 2's output electricity, the outlet wire end of collector is connected with commercial power electric wire netting 4 and user load 5 electricity respectively, the high-voltage terminal of arrester is connected with the inlet wire end of collector electricity, the low-voltage terminal of arrester is connected with the monitor, in case unusual high voltage appears, the arrester acts immediately, with high-voltage impulse current direction ground, thereby the restriction voltage amplitude, the protection equipment is insulating not destroyed, the monitor then is used for recording the overvoltage action number of times of arrester.

In this embodiment, block terminal 3 is equipped with a plurality of operation pilot lamp, the quantity of operation pilot lamp is the same with solar cell panel 1, every operation pilot lamp corresponds with the output of the miniature inverter 2 of difference and is connected, the operation pilot lamp is used for showing the operating condition who corresponds solar cell panel 1, when solar cell panel 1 damages or breaks down, it extinguishes to correspond the operation pilot lamp, the maintenance personal of being convenient for seeks the fault point fast, improve maintenance efficiency.

The embodiments described above are merely illustrative, and may or may not be physically separate, if referring to units illustrated as separate components; if reference is made to a component displayed as a unit, it may or may not be a physical unit, and may be located in one place or distributed over a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: modifications of the technical solutions described in the embodiments or equivalent replacements of some technical features may still be made. Such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

The present invention is not limited to the above-mentioned alternative embodiments, and various other products can be obtained by anyone under the teaching of the present invention. The above detailed description should not be taken as limiting the scope of the invention, which is defined in the following claims, and which can be used to interpret the claims.

Claims

1. A solar powered system, characterized by: the solar energy power generation system comprises a plurality of solar cell panels (1), a plurality of micro inverters (2), a distribution box (3), an energy storage converter (6), a storage battery (7), a first data acquisition and analysis module (8), a second data acquisition and analysis module (9), a server (10) and a mobile terminal (11), wherein the number of the solar cell panels (1) is the same as that of the micro inverters (2), the output end of each solar cell panel (1) is electrically connected with the input end of the corresponding micro inverter (2), the output end of each solar cell panel (1) is also electrically connected with the second data acquisition and analysis module (9), the output end of each micro inverter (2) is connected to the distribution box (3), the distribution box (3) is electrically connected with the storage battery (7) through the energy storage converter (6), and the storage battery (7) is electrically connected with the first data acquisition and analysis module (8), the first data acquisition and analysis module (8) and the second data acquisition and analysis module (9) are in communication connection with a server (10), and the server (10) is in communication connection with a mobile terminal (11).

2. A solar powered system as claimed in claim 1, wherein: the first data acquisition and analysis module (8) comprises a first voltage acquisition circuit (801), a first current acquisition circuit (802), a first wireless communication module (804) and a first controller (803); the first voltage acquisition circuit (801), the first current acquisition circuit (802) and the first wireless communication module (804) are electrically connected with the first controller (803), the first voltage acquisition circuit (801) and the first current acquisition circuit (802) are also electrically connected with the storage battery (7), and the first wireless communication module (804) is in communication connection with the server (10).

3. A solar powered system as claimed in claim 2 wherein: the second data acquisition and analysis module (9) comprises a second voltage acquisition circuit (901), a second current acquisition circuit (902), a second wireless communication module (904) and a second controller (903); the second voltage acquisition circuit (901), the second current acquisition circuit (902) and the second wireless communication module (904) are electrically connected with the second controller (903), the second voltage acquisition circuit (901) and the second current acquisition circuit (902) are electrically connected with the output end of the solar cell panel (1), and the second wireless communication module (904) is in communication connection with the server (10).

4. A solar powered system as claimed in claim 1, wherein: the micro inverter (2) comprises a direct current conversion module (201), an MPPT control module (202) and an inversion module (203), the MPPT control module (202), the inversion module (203) and the solar panel (1) are electrically connected with the direct current conversion module (201), and the inversion module (203) is electrically connected with the distribution box (3).

5. A solar powered system as claimed in claim 1, wherein: the solar power supply system further comprises a plurality of DC-DC converters (12), the number of the DC-DC converters (12) is the same as that of the solar panels (1), and each solar panel (1) is electrically connected with the corresponding micro inverter (2) through different DC-DC converters (12).

6. A solar powered system as claimed in claim 1, wherein: the solar power supply system further comprises an electric quantity display module, and the electric quantity display module is electrically connected with the first data acquisition and analysis module (8).

7. A solar powered system as claimed in claim 1, wherein: the energy storage converter (6) comprises a DC/AC bidirectional converter, a control unit and a CAN interface, the DC/AC bidirectional converter is electrically connected with the distribution box (3), the storage battery (7) and the control unit respectively, and the control unit is in communication connection with the first data acquisition and analysis module (8) through the CAN interface.

8. A solar powered system as claimed in claim 1, wherein: the solar power supply system further comprises a mains supply power grid (4) and a user load (5), wherein the mains supply power grid (4) and the user load (5) are electrically connected with the distribution box (3).

9. A solar powered system as claimed in claim 8 wherein: block terminal (3) are equipped with collector and arrester, the inlet wire end of collector is connected with the output electricity of micro-inverter (2), the outlet terminal of collector is connected with commercial power electric wire netting (4) and user load (5) electricity respectively, the high-voltage terminal of arrester is connected with the inlet wire end electricity of collector, the low-voltage terminal of arrester is connected with the monitor.

10. A solar powered system as claimed in claim 9 wherein: block terminal (3) are equipped with a plurality of operation pilot lamp, the quantity of operation pilot lamp is the same with solar cell panel (1), and every operation pilot lamp corresponds with the output of the miniature inverter (2) of difference and is connected, the operation pilot lamp is used for showing the operating condition who corresponds solar cell panel (1).