CN111969581B - Power supply system with single-power input interface compatible with photovoltaic and wind power - Google Patents
Power supply system with single-power input interface compatible with photovoltaic and wind power Download PDFInfo
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- CN111969581B CN111969581B CN202010828657.2A CN202010828657A CN111969581B CN 111969581 B CN111969581 B CN 111969581B CN 202010828657 A CN202010828657 A CN 202010828657A CN 111969581 B CN111969581 B CN 111969581B
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 57
- 101100236764 Caenorhabditis elegans mcu-1 gene Proteins 0.000 claims abstract description 32
- 238000004891 communication Methods 0.000 claims description 12
- 238000010586 diagram Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/22—The renewable source being solar energy
- H02J2300/24—The renewable source being solar energy of photovoltaic origin
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/28—The renewable source being wind 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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Control Of Eletrric Generators (AREA)
Abstract
The invention provides a power supply system with a single-power input interface compatible with photovoltaic and wind power, which comprises a photovoltaic module, a GP (GP) generator, a fan and a wind power conversion device, wherein the GP generator is connected with the photovoltaic module; the GP generator is divided into a photovoltaic conversion power topology and control unit MCU1, and the wind power conversion device is divided into a wind power conversion power topology and control unit MCU 2; the output end of the photovoltaic module is connected with the input end of the photovoltaic conversion power topology through an input power bus, and the photovoltaic conversion power topology converts and outputs a direct current signal; the fan outputs a direct current signal through wind power conversion power topology conversion, and the output end of the wind power conversion power topology is connected in parallel to the input power bus; the control unit MCU1 is connected with the control unit MCU 2. Compared with the prior art, the invention provides a compatible interface, so that the photovoltaic array and the wind driven generator parallel power bus can be used for summarizing the same input port, and can also meet the requirement of independent use of any one, thereby ensuring the compatibility of the input interface and the high-efficiency utilization rate of energy.
Description
Technical Field
The invention relates to a power supply system at least comprising photovoltaic and wind power input.
Background
The existing wind power and photovoltaic power generation equipment is connected into a system after voltage and current conversion is carried out through different interfaces, and the system is mainly divided into two types:
1. sharing an alternating current bus;
as shown in fig. 1, the DC/DC module of the PV interface of the device tracks the maximum power point of the system by running the MPPT function, and outputs the maximum power point to the AC bus via the DC/AC;
and a DC/DC module of the equipment fan interface operates to stabilize DC port voltage and outputs the DC port voltage to an Alternating Current (AC) bus through DC/AC.
2. Sharing a direct current bus;
as shown in fig. 2, the DC/DC module of the PV interface of the device tracks the maximum power point of the system by running the MPPT function, and outputs the maximum power point to the DC bus; the DC/DC module of the equipment fan interface operates to stabilize the bus voltage of the DC port.
Disclosure of Invention
In order to solve the above defects, the invention provides a power supply system with a single-power input interface compatible with photovoltaic and wind power, and the technical scheme is as follows:
a power supply system with a single-power input interface compatible with photovoltaic and wind power comprises a photovoltaic module, a GP generator, a fan and a wind power conversion device; the GP generator is divided into a photovoltaic conversion power topology and control unit MCU1, and the wind power conversion device is divided into a wind power conversion power topology and control unit MCU 2; the output end of the photovoltaic module is connected with the input end of the photovoltaic conversion power topology through an input power bus, and the photovoltaic conversion power topology converts and outputs a direct current signal; the fan outputs a direct current signal through wind power conversion power topology conversion, and the output end of the wind power conversion power topology is connected to the input power bus in parallel; the control unit MCU1 is connected with the control unit MCU2 and respectively collects voltage and current signals on the input power bus; when only one path of photovoltaic is detected to have input, the control unit MCU1 controls the photovoltaic conversion power topology according to the voltage and current signals on the input power bus to enable the photovoltaic module to operate at a proper power point position; when the condition that one path of the fan is input is detected, the control unit MCU2 and the control unit MCU1 are in data communication, the control unit MCU2 takes over the control right, and the voltage of the direct current bus is controlled by adjusting the wind power conversion power topology.
Preferably, the photovoltaic device is a single PV photovoltaic panel or a PV photovoltaic array.
Preferably, when the control unit MCU2 takes over control right, the control unit MCU1 is used for counting power and assisting the protection circuit.
Preferably, the fan and the wind-electricity conversion device are packaged together.
Preferably, when only one path of the fan is detected to have input, the control unit MCU2 and the control unit MCU1 perform data communication, the control unit MCU2 takes over the control right, and the voltage of the dc bus is controlled by adjusting the wind power conversion power topology.
Preferably, when it is detected that one path of the fan has input and one path of the photovoltaic has input, the control unit MCU2 performs data communication with the control unit MCU1, the control unit MCU2 takes over the control right, and the photovoltaic module is operated at a proper power point position by adjusting the wind power conversion power topology to control the voltage of the dc bus.
Preferably, the control unit MCU2 is enabled by the control unit MCU 1.
Preferably, the photovoltaic module is operated at a suitable power point position, and the MPPT function tracking system maximum power point is operated.
Compared with the prior art, the invention has the following advantages:
the output end of the photovoltaic module is connected with the input end of the photovoltaic conversion power topology through an input power bus, and the photovoltaic conversion power topology converts and outputs a direct current signal; the wind turbine outputs a direct current signal through wind power conversion power topology conversion, and the output end of the wind power conversion power topology is connected in parallel to an input power bus; the control unit MCU1 is connected with the control unit MCU2 and respectively collects voltage and current signals on the input power bus, so that the interface with compatibility provided by the invention enables the photovoltaic array and the wind driven generator to be connected with the power bus in parallel to use the same input port in a summary manner, and can also meet the requirement of independent use of any one, thereby ensuring the compatibility of the input interface and the high-efficiency utilization rate of energy.
The GP generator MCU enables the photovoltaic panel to operate at a proper power point position by sampling input voltage and current signals and controlling the internal topological structure of the GP generator, so that the high efficiency utilization rate of energy is ensured, and the design of the compatible interface can be freely switched in various modes, thereby being suitable for users with various requirements.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a schematic block diagram of a conventional common AC bus;
FIG. 2 is a schematic block diagram of a conventional common DC bus;
fig. 3 is a schematic diagram of the working principle of the present invention.
FIG. 4 is a schematic view of one embodiment of the present invention;
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The invention provides an input compatibility interface based on the existing two modes. The photovoltaic array and the wind driven generator parallel power bus are enabled to be gathered and used by the same input port, any one of the input ports can be used independently, and the compatibility of the input ports and the efficient utilization of energy are guaranteed.
The technical solution of the present invention will now be described in detail with reference to the accompanying drawings and specific embodiments:
fig. 3 is a schematic view of the working principle of the present invention, as shown in fig. 3: a power supply system with a single-power input interface compatible with photovoltaic and wind power comprises a photovoltaic module, a GP generator, a fan and a wind power conversion device; the GP generator is divided into a photovoltaic conversion power topology and control unit MCU1, and the wind power conversion device is divided into a wind power conversion power topology and control unit MCU 2; the output end of the photovoltaic module is connected with the input end of the photovoltaic conversion power topology through an input power bus, and the photovoltaic conversion power topology converts and outputs a direct current signal; the fan outputs a direct current signal through wind power conversion power topology conversion, and the output end of the wind power conversion power topology is connected in parallel to the input power bus; the control unit MCU1 is connected with the control unit MCU2 and respectively collects voltage and current signals on the input power bus; when only one path of photovoltaic is detected to be input, the control unit MCU1 controls the photovoltaic conversion power topology according to the voltage and current signals on the input power bus to enable the photovoltaic module to operate at a proper power point position; when the condition that one path of the fan is input is detected, the control unit MCU2 and the control unit MCU1 are in data communication, the control unit MCU2 takes over the control right, and the voltage of the direct current bus is controlled by adjusting the wind power conversion power topology.
The photovoltaic device is a single PV photovoltaic panel or a PV photovoltaic array. When the control unit MCU2 takes over the control right, the control unit MCU1 is used for counting the electric quantity and assisting the protection circuit. The fan and the wind-electricity conversion device are packaged together. When only one path of the fan is detected to be input, the control unit MCU2 and the control unit MCU1 are in data communication, the control unit MCU2 takes over the control right, and the voltage of the direct current bus is controlled by adjusting the wind power conversion power topology. When the condition that one path of the fan is input and the other path of the photovoltaic is also input is detected, the control unit MCU2 and the control unit MCU1 are in data communication, the control unit MCU2 takes over the control right, and the voltage of the direct current bus is controlled through adjusting wind power conversion power topology, so that the photovoltaic module operates at a proper power point position. The control unit MCU2 is enabled by the control unit MCU 1. And (3) operating the photovoltaic module at a proper power point position, namely operating the maximum power point of the MPPT function tracking system.
FIG. 4 is a schematic diagram of an embodiment of the present invention, as shown in FIG. 4, a single PV photovoltaic panel or PV photovoltaic array aggregates a PV input bus, performs voltage and current signal detection on the input power bus, and sends the signals to a fan control MCU and a GP generator MCU respectively; the fan is converted into a direct current signal through fan topology; two paths of direct current signals are gathered and connected to a power interface of the GP generator;
when the photovoltaic grid-connected inverter works, when one photovoltaic path is input with energy, the GP generator MCU samples input voltage and current signals and controls the internal topological structure of the GP generator to enable the photovoltaic panel to operate at a proper power point (according to the internal energy requirement);
when one path of the fan is input, the fan control MCU2 and the GP generator MCU1 carry out data communication to establish interconnection; after communication is established, the MCU1 converts the control right to the MCU2, so that the fan control MCU2 controls the voltage of the direct-current bus, and the GP generator MCU1 gives up the power for controlling the voltage of the direct-current bus and converts the power into the functions of counting electric quantity and protecting other functions;
when the photovoltaic energy and the fan energy are simultaneously input, the fan control MCU2 and the GP generator MCU1 are in data communication to establish interconnection; the fan control MCU2 samples the input voltage and current signals and controls the DC bus voltage to make the photovoltaic panel operate at a proper power point (according to the internal energy requirement); the GP generator MCU1 gives up the power of controlling the DC bus voltage and converts the power into the function of counting the electric quantity.
The method can realize free switching under three application scenes, thereby being suitable for the requirements of different users.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (8)
1. A power supply system with a single-power input interface compatible with photovoltaic and wind power comprises a photovoltaic module, a GP generator, a fan and a wind power conversion device; the GP power generator is divided into a photovoltaic conversion power topology and control unit MCU1, and the wind power conversion device is divided into a wind power conversion power topology and control unit MCU 2; the output end of the photovoltaic module is connected with the input end of the photovoltaic conversion power topology through an input power bus, and the photovoltaic conversion power topology converts and outputs a direct current signal; the fan outputs a direct current signal through wind power conversion power topology conversion, and the output end of the wind power conversion power topology is connected to the input power bus in parallel; the control unit MCU1 is connected with the control unit MCU2 and respectively collects voltage and current signals on the input power bus; when only one path of photovoltaic is detected to have input, the control unit MCU1 controls the photovoltaic conversion power topology according to the voltage and current signals on the input power bus to enable the photovoltaic module to operate at a proper power point position; when the condition that one path of the fan is input is detected, the control unit MCU2 and the control unit MCU1 are in data communication, the control unit MCU2 takes over the control right, and the voltage of the direct current bus is controlled by adjusting the wind power conversion power topology.
2. The single power input interface photovoltaic and wind power compatible power supply system of claim 1, wherein the photovoltaic module is a single PV photovoltaic panel or a PV photovoltaic array.
3. The power supply system with the single power input interface compatible with photovoltaic power and wind power as claimed in claim 1, wherein when the control unit MCU2 takes over the control right, the control unit MCU1 is used for counting the electric quantity and assisting the protection circuit.
4. The photovoltaic-wind compatible single power input interface power supply system according to claim 1, wherein the fan and wind-to-electricity conversion device are packaged together.
5. The power supply system compatible with photovoltaic and wind power with single power input interface of claim 1, wherein when only one path of the fan is detected to be input, the control unit MCU2 is in data communication with the control unit MCU1, the control unit MCU2 takes over the control right, and the voltage of the DC bus is controlled by adjusting the wind power conversion power topology.
6. The power supply system of claim 1, wherein when it is detected that there is an input at one path of the fan and an input at the other path of the photovoltaic, the control unit MCU2 is in data communication with the control unit MCU1, the control unit MCU2 takes over the control right, and the photovoltaic module is operated at a proper power point position by adjusting the voltage of the wind-power conversion power topology control dc bus.
7. The single power input interface photovoltaic and wind power compatible power supply system of claim 1, wherein the control unit MCU2 is enabled by control unit MCU 1.
8. The power supply system with the single power input interface compatible with photovoltaic and wind power as claimed in claim 1, wherein the photovoltaic module is operated at a suitable power point position, which is an MPPT function tracking system maximum power point.
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| CN202010828657.2A CN111969581B (en) | 2020-08-17 | 2020-08-17 | Power supply system with single-power input interface compatible with photovoltaic and wind power |
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| CN202010828657.2A CN111969581B (en) | 2020-08-17 | 2020-08-17 | Power supply system with single-power input interface compatible with photovoltaic and wind power |
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| CN111969581B true CN111969581B (en) | 2021-09-24 |
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Denomination of invention: A single power input interface compatible with photovoltaic and wind power supply system Granted publication date: 20210924 Pledgee: Shaanxi Qinnong Rural Commercial Bank Co Ltd University City Sub branch Pledgor: Boyang Energy Technology Co.,Ltd. Registration number: Y2024980031244 |