CN210806757U - Solar off-grid power generation system - Google Patents
Solar off-grid power generation system Download PDFInfo
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- CN210806757U CN210806757U CN201922028772.7U CN201922028772U CN210806757U CN 210806757 U CN210806757 U CN 210806757U CN 201922028772 U CN201922028772 U CN 201922028772U CN 210806757 U CN210806757 U CN 210806757U
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Abstract
A solar off-grid power generation system is used for supplying power to a load and comprises a solar assembly and an inverter device which is only connected in series between the solar assembly and the load, wherein the solar assembly is used for receiving solar energy and generating direct current, and the inverter device is used for converting the direct current generated by the solar assembly into alternating current to be output to the load. The solar off-grid power generation system can reduce cost and has a more stable system.
Description
Technical Field
The utility model relates to a solar energy power generation technical field, concretely relates to solar energy is from net power generation system.
Background
The current solar power generation comprises two types of grid-connected power generation and off-grid power generation. The grid-connected power generation is that the energy generated by solar energy passes through an inverter and then is connected with a power grid in parallel, and the energy is fed to the power grid or is carried by the power grid in a combined way; the off-grid power generation is mainly used in areas with unstable power or no power supply, and the storage battery is used as an energy storage module to improve the power supply condition of customers. In some application scenarios, the requirement on power supply reliability is not high, and power is supplied only when solar energy is required, so that the energy storage module has no practical application, and the cost of the solar power generation system is increased.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the main technical problem who solves provides a solar energy off-grid power generation system with low costs.
In order to solve the above technical problem, in one embodiment, a solar off-grid power generation system is provided for supplying power to a load, and the solar off-grid power generation system includes a solar module and an inverter device connected in series only between the solar module and the load, wherein the solar module is configured to receive solar energy and generate direct current, and the inverter device is configured to convert the direct current generated by the solar module into alternating current to be output to the load.
Furthermore, the inverter device comprises a control module, a first output module and a sampling module;
the sampling module is used for sampling direct current provided by the solar module to obtain direct current sampling information;
and the control module is used for controlling the first output module to convert the direct current provided by the solar component into alternating current matched with the direct current according to the direct current sampling information.
Furthermore, the inverter device further comprises a comparison module for comparing the relation between the voltage amplitude value in the direct current sampling information and a preset voltage value; and when the voltage amplitude in the direct current sampling information is smaller than the preset voltage value, the control module closes the power supply of the inverter device to the load.
And further, the power supply system also comprises a human-computer interaction device, wherein the human-computer interaction device is used for sending the received external instruction to the control module and starting or closing the power supply of the inverter device to the load.
Furthermore, the inverter device further comprises a second output module, the second output module is connected in series between the first output module and the load, a switch is arranged in the second output module, and the control module controls the on-off of the switch.
Further, the direct current generated by the solar module is high-voltage direct current, and the first output module is a DC-AC conversion module.
According to the solar off-grid power generation system of the embodiment, the inverter is only connected in series between the solar assembly and the load, the energy storage module is omitted, the charging of the energy storage module by the electric energy generated by the solar assembly is changed into the direct power supply of the inverter, the energy conversion link is reduced, the manufacturing cost of the whole system is reduced, and the stability of the system is better.
Drawings
Fig. 1 is a schematic structural diagram of an off-grid solar power generation system according to an embodiment.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present application have not been shown or described in detail in order to avoid obscuring the core of the present application from excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.
Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the method descriptions may be transposed or transposed in order, as will be apparent to one of ordinary skill in the art. Thus, the various sequences in the specification and drawings are for the purpose of describing certain embodiments only and are not intended to imply a required sequence unless otherwise indicated where such sequence must be followed.
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 term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).
Referring to fig. 1, the present embodiment provides an off-grid solar power generation system for supplying power to a load 40, and the off-grid solar power generation system includes a solar module 10, an inverter 20, and a human-computer interaction device 30.
The solar module 10 is used for receiving solar energy, generating direct current to be output to the inverter 20, and then supplying power to the load 40.
Preferably, the direct current generated by the solar module 10 is a high-voltage direct current, so that the inverter 20 may not be provided with a boost module, thereby reducing the project construction amount.
The inverter device 20 includes a first output module 21, a second output module 22, a control module 23, a sampling module 24, and a comparison module 25.
The first output module 21 and the second output module 22 are connected in series between the solar module 10 and the load 40.
The first output module 21 is used for converting the direct current input by the solar module 10 into alternating current, and when the solar module 10 provides high-voltage direct current, the first output module 21 only includes an inverter module, i.e., a DC-AC module, and does not include a boost module.
The second output module 22 is provided with a switch, and the control module 23 controls the switching of the switch to control whether the entire inverter 20 supplies power to the load 40.
The sampling module 24 is configured to sample the direct current provided by the solar module 10 to obtain direct current sampling information, where the direct current sampling information includes a voltage amplitude of the direct current.
The comparison module 25 is used for the relationship between the voltage amplitude in the dc sampling information and the preset voltage value, when the voltage amplitude in the dc sampling information is greater than the preset voltage value, the control module 23 controls the first output module 21 according to the dc sampling information to convert the dc power provided by the solar module 10 into ac power matched with the dc power, specifically, when the solar energy is sufficient, the dc voltage is higher, and the inverter 20 performs output voltage control according to the dc power generated by the solar module 10 to meet the standard normal voltage output and supply power to the load 40; when the solar energy is weak and not enough to support the load 40, the inverter device 20 controls the first output module 21 to adjust the output voltage according to the weak direct current voltage, so as to reduce the output voltage, and since the voltage of the load 40 is reduced, the obtained energy is also reduced, and meanwhile, the load 40 can also work normally.
When the solar energy is further reduced, the comparison module 25 detects that the voltage amplitude in the dc sampling information is smaller than the preset voltage value, and at this time, the control module 23 turns off the power supply of the inverter 20 to the load 40 by turning off the switch in the second output module 22.
The human-computer interaction device 30 is used for sending the received external instruction to the control module 23, and turning on or off the power supply of the inverter device 20 to the load.
The solar off-grid power generation system of the embodiment has less circuit modules because of no energy storage link and direct inversion by adopting high-voltage solar energy input, reduces the energy conversion link, lowers the manufacturing cost of the whole system, also ensures that the stability and the reliability of the system are better,
it is right to have used specific individual example above the utility model discloses expound, only be used for helping to understand the utility model discloses, not be used for the restriction the utility model discloses. To the technical field of the utility model technical personnel, the foundation the utility model discloses an idea can also be made a plurality of simple deductions, warp or replacement.
Claims (6)
1. The utility model provides a solar energy is from net power generation system for load power supply, this solar energy is from net power generation system includes solar energy component, is used for receiving solar energy, produces the direct current, its characterized in that still includes, only establishes ties the inverter between solar energy component and load, and this inverter is used for turning into the alternating current with the direct current that solar energy component produced and exports to the load.
2. The solar off-grid power generation system of claim 1, wherein the inverter device comprises a control module, a first output module, and a sampling module;
the sampling module is used for sampling direct current provided by the solar module to obtain direct current sampling information;
and the control module is used for controlling the first output module to convert the direct current provided by the solar component into alternating current matched with the direct current according to the direct current sampling information.
3. The solar off-grid power generation system of claim 2, wherein the inverter device further comprises a comparison module for comparing a voltage amplitude in the dc sampling information with a preset voltage value; and when the voltage amplitude in the direct current sampling information is smaller than the preset voltage value, the control module closes the power supply of the inverter device to the load.
4. The solar off-grid power generation system of claim 2, further comprising a human-machine interaction device for sending the received external command to the control module to turn on or off the inverter device to supply power to the load.
5. The solar off-grid power generation system of claim 3 or 4, wherein the inverter further comprises a second output module, the second output module is connected in series between the first output module and the load, a switch is arranged in the second output module, and the control module controls the on/off of the switch.
6. The solar off-grid power generation system of claim 2, wherein the direct current generated by the solar module is a high voltage direct current and the first output module is a DC-AC conversion module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922028772.7U CN210806757U (en) | 2019-11-21 | 2019-11-21 | Solar off-grid power generation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922028772.7U CN210806757U (en) | 2019-11-21 | 2019-11-21 | Solar off-grid power generation system |
Publications (1)
| Publication Number | Publication Date |
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| CN210806757U true CN210806757U (en) | 2020-06-19 |
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| CN201922028772.7U Active CN210806757U (en) | 2019-11-21 | 2019-11-21 | Solar off-grid power generation system |
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| CN (1) | CN210806757U (en) |
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- 2019-11-21 CN CN201922028772.7U patent/CN210806757U/en active Active
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