CN110556869A - Photovoltaic power supply-based micro-grid system - Google Patents
Photovoltaic power supply-based micro-grid system Download PDFInfo
- Publication number
- CN110556869A CN110556869A CN201910968729.0A CN201910968729A CN110556869A CN 110556869 A CN110556869 A CN 110556869A CN 201910968729 A CN201910968729 A CN 201910968729A CN 110556869 A CN110556869 A CN 110556869A
- Authority
- CN
- China
- Prior art keywords
- unit
- photovoltaic power
- current
- photovoltaic
- inverter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
-
- 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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
-
- 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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a photovoltaic power supply-based microgrid system, which comprises photovoltaic units, conversion units, energy storage units and inversion units, wherein the photovoltaic units, the conversion units and the inversion units are electrically connected in sequence; the conversion unit is specifically a light energy converter and is used for converting solar energy received by the photovoltaic power generation array into electric energy, and the inversion unit is specifically a plurality of inverters. According to the photovoltaic grid system, solar energy received by the photovoltaic power generation array is converted into electric energy by the conversion unit and stored in the energy storage unit, the output current is converted and output by the inversion unit, and the current regulator and the voltage stabilizer are arranged to regulate the current in a voltage stabilizing manner, so that the current output by the whole microgrid system is more gentle, the structure is simple, the loss of the current in transmission is reduced, and the cost is low.
Description
Technical Field
The invention relates to the technical field of power grids, in particular to a photovoltaic power supply-based micro-grid system.
Background
The micro-grid is also called as a micro-grid and refers to a small power generation and distribution system composed of a distributed power supply, an energy storage device, an energy conversion device, a load, a monitor and the like, the micro-grid is provided to realize flexible and efficient application of the distributed power supply, solve the problem of grid connection of the distributed power supply with large quantity and various forms, develop and extend the micro-grid, can fully promote large-scale access of the distributed power supply and renewable energy, realize high-reliability supply of various energy forms of the load, and is an effective mode for realizing an active power distribution network. However, most of the existing micro-grid systems are complex in structure, high in system cost and large in loss during power transmission.
Therefore, it is necessary to invent a photovoltaic power supply-based microgrid system to solve the above problems.
Disclosure of Invention
The invention aims to provide a photovoltaic power supply-based microgrid system, which is characterized in that solar energy received by a photovoltaic power generation array is converted into electric energy by using a conversion unit, the electric energy is stored in an energy storage unit, the output current is converted and output by using an inverter unit, and a current regulator and a voltage stabilizer are arranged to regulate the current in a voltage stabilizing manner, so that the current output by the whole microgrid system is more gentle, the structure is simple, and the problems in the background art are solved.
In order to achieve the purpose, the invention provides the following technical scheme: a photovoltaic power supply-based micro-grid system comprises a photovoltaic unit, a conversion unit, an energy storage unit and an inversion unit, wherein the photovoltaic unit, the conversion unit and the inversion unit are electrically connected in sequence;
the photovoltaic units are specifically a plurality of photovoltaic power generation arrays which are arranged in parallel;
the conversion unit is specifically a light energy converter and is used for converting solar energy received by the photovoltaic power generation array into electric energy;
the inverter unit is specifically a plurality of inverters, the input end of the inverter is connected with the output end of the photovoltaic power generation array, the output end of the inverter is connected with the inverter, and the output end of the inverter is further connected with the energy storage unit.
Preferably, the energy storage unit is further provided with a control switch, and the control switch is further electrically connected with the conversion unit and the inversion unit and is used for switching the connection state between the inverter and the energy storage unit and between the optical energy converter and the energy storage unit.
Preferably, the output end of the inversion unit is provided with a load terminal, a protection device and a control device, the load terminal is specifically various electrical appliance terminals, the protection device comprises a current regulator, a voltage stabilizer and a plurality of capacitors, the current regulator is used for regulating current input by the load terminal so as to adapt to load environments required by the operation of various electrical appliance terminals, and the voltage stabilizer is used for stabilizing voltage of the input current and reducing fluctuation of output current.
Preferably, controlling means includes PLC controller, a plurality of relay and circuit breaker, a plurality of circuit breakers set up in load terminal's input, and a plurality of relay input are connected with the output of PLC controller and the output is connected with the circuit breaker.
Preferably, the input end of the circuit breaker is further connected with the output end of the voltage stabilizer.
the invention has the technical effects and advantages that:
The solar energy received by the photovoltaic power generation array is converted into electric energy by the conversion unit and stored in the energy storage unit, the output current is converted and output by the inversion unit, and the current regulator and the voltage stabilizer are arranged to regulate the current in a voltage stabilizing manner, so that the current output by the whole microgrid system is more gentle, the structure is simple, the loss of the current in transmission is reduced, and the cost is low;
The corresponding load terminals are independently controlled by arranging the relays, and the circuit breaker is arranged, so that the safety of the system during working is improved.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention.
fig. 2 is a schematic view of the connection structure at the load terminal of the present invention.
In the figure: the photovoltaic conversion system comprises a photovoltaic unit 1, a conversion unit 2, an energy storage unit 3, an inversion unit 4, a load terminal 5, a protection device 6 and a control device 7.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 invention.
The invention provides a photovoltaic power supply-based microgrid system as shown in figures 1-2, which comprises a photovoltaic unit 1, a conversion unit 2, an energy storage unit 3 and an inversion unit 4, wherein the photovoltaic unit 1, the conversion unit 2 and the inversion unit 4 are electrically connected in sequence;
The photovoltaic units 1 are specifically a plurality of photovoltaic power generation arrays arranged in parallel;
the conversion unit 2 is specifically a light energy converter and is used for converting solar energy received by the photovoltaic power generation array into electric energy;
The inverter unit 4 is specifically a plurality of inverters, the input end of the inverter is connected with the output end of the photovoltaic power generation array, the output end of the inverter is connected with the inverter, and the output end of the inverter is further connected with the energy storage unit 3.
Further, in the above technical solution, the energy storage unit 3 is further provided with a control switch, and the control switch is further electrically connected with the conversion unit 2 and the inversion unit 4, and is used for switching the connection state between the inverter and the energy converter and the energy storage unit 3.
Further, in the above technical solution, the output end of the inverter unit 4 is provided with a load terminal 5, a protection device 6 and a control device 7, the load terminal 5 is specifically a terminal of various electrical appliances, the protection device 6 includes a current regulator, a voltage regulator and a plurality of capacitors, the current regulator is used for regulating the current input by the load terminal 5 to adapt to the load environment required by the operation of various electrical appliances, and the voltage regulator is used for stabilizing the input current and reducing the fluctuation of the output current.
Further, in the above technical solution, the control device 7 includes a PLC controller, a plurality of relays and a circuit breaker, the plurality of circuit breakers are provided at the input end of the load terminal 5, the input ends of the plurality of relays are connected with the output end of the PLC controller and the output end is connected with the circuit breaker.
Further, in the above technical solution, the input terminal of the circuit breaker is further connected to the output terminal of the voltage stabilizer.
This practical theory of operation:
Referring to the attached drawings 1-2 of the specification, in operation, solar energy received by a plurality of photovoltaic power generation arrays arranged in parallel is converted into electric energy through a conversion unit and stored in an energy storage unit 3, meanwhile, a control switch arranged on the energy storage unit is electrically connected with the conversion unit 2 and an inversion unit 4, the connection state between an inverter, a light energy converter and the energy storage unit 3 is switched according to the requirement of power transmission, when direct transmission is needed, the control switch is closed, current output by the conversion unit is directly converged into the inversion unit 4 for conversion, when transmission is needed, the control switch is opened, current output by the conversion unit 2 is converged into the energy storage unit 3 for storage, when the inversion unit 4 receives the converged current, a current regulator regulates current input by a load terminal 5 so as to adapt to load environments required by the operation of various electric appliance terminals, the voltage stabilizer stabilizes an input current to reduce fluctuation of an output current, and a PLC controller in the control device 7 transmits a control command to start each load terminal 5 via a relay.
finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (5)
1. The utility model provides a little grid system based on photovoltaic power supply, includes photovoltaic unit (1), conversion unit (2), energy storage unit (3) and contravariant unit (4), its characterized in that: the photovoltaic unit (1), the conversion unit (2) and the inversion unit (4) are electrically connected in sequence;
The photovoltaic units (1) are specifically a plurality of photovoltaic power generation arrays which are arranged in parallel;
The conversion unit (2) is specifically a light energy converter and is used for converting solar energy received by the photovoltaic power generation array into electric energy;
The inverter unit (4) is specifically a plurality of inverters, the input end of each inverter is connected with the output end of the photovoltaic power generation array, the output end of each inverter is connected with the corresponding inverter, and the output end of each inverter is further connected with the energy storage unit (3).
2. The photovoltaic power supply-based microgrid system of claim 1, characterized in that: the energy storage unit (3) is also provided with a control switch, and the control switch is also electrically connected with the conversion unit (2) and the inversion unit (4) and is used for switching the connection state between the inverter and the optical energy converter and the energy storage unit (3).
3. The photovoltaic power supply-based microgrid system of claim 2, characterized in that: the output end of the inversion unit (4) is provided with a load terminal (5), a protection device (6) and a control device (7), the load terminal (5) is specifically various electrical appliance terminals, the protection device (6) comprises a current regulator, a voltage stabilizer and a plurality of capacitors, the current regulator is used for regulating current input by the load terminal (5) so as to adapt to load environments required by the operation of various electrical appliance terminals, and the voltage stabilizer is used for stabilizing the voltage of the input current and reducing the fluctuation of the output current.
4. The photovoltaic power supply-based microgrid system of claim 3, characterized in that: the control device (7) comprises a PLC controller, a plurality of relays and circuit breakers, the circuit breakers are arranged at the input end of the load terminal (5), the input ends of the relays are connected with the output end of the PLC controller, and the output ends of the relays are connected with the circuit breakers.
5. the photovoltaic power supply-based microgrid system of claim 4, characterized in that: the input end of the breaker is also connected with the output end of the voltage stabilizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910968729.0A CN110556869A (en) | 2019-10-12 | 2019-10-12 | Photovoltaic power supply-based micro-grid system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910968729.0A CN110556869A (en) | 2019-10-12 | 2019-10-12 | Photovoltaic power supply-based micro-grid system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110556869A true CN110556869A (en) | 2019-12-10 |
Family
ID=68742919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910968729.0A Pending CN110556869A (en) | 2019-10-12 | 2019-10-12 | Photovoltaic power supply-based micro-grid system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110556869A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113206540A (en) * | 2021-05-25 | 2021-08-03 | 国网山东省电力公司安丘市供电公司 | Photovoltaic power supply voltage stabilizing system based on photovoltaic inverter |
-
2019
- 2019-10-12 CN CN201910968729.0A patent/CN110556869A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113206540A (en) * | 2021-05-25 | 2021-08-03 | 国网山东省电力公司安丘市供电公司 | Photovoltaic power supply voltage stabilizing system based on photovoltaic inverter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI470893B (en) | Electric energy supply system | |
| CN105811447A (en) | Intelligent DC power distribution center-based urban distribution network grid structure | |
| CN110994968B (en) | Pre-charging circuit, inverter and power generation system | |
| WO2021197045A1 (en) | Medium-voltage photovoltaic grid-connected inverter system and photovoltaic power generation system | |
| WO2020135877A1 (en) | Photovoltaic system | |
| CN207732453U (en) | A kind of collecting and distributing type photovoltaic generation energy storage frequency modulation system | |
| CN110556869A (en) | Photovoltaic power supply-based micro-grid system | |
| CN210350790U (en) | Wind power, photoelectricity and generator coupled intelligent micro-grid structure with multi-energy complementation | |
| CN209994117U (en) | Energy storage system | |
| CN108649606B (en) | On-grid and off-grid switching device | |
| CN113890164A (en) | Photovoltaic energy storage power supply control system | |
| CN210693533U (en) | Open-circuit protection device for storage battery pack of transformer substation | |
| CN206412831U (en) | Power supply control loop of the wind-powered electricity generation double-feed current transformer in grid-connected | |
| CN216215912U (en) | Inverter and auxiliary power supply circuit thereof | |
| CN220306961U (en) | Power grid switching device suitable for multi-machine parallel operation | |
| CN104539186A (en) | V/f and inverse droop micro-grid inverter power supply with hysteretic characteristic | |
| CN220711145U (en) | Parallel-to-off-grid switching circuit of energy storage inverter, energy storage inverter and photovoltaic energy storage system | |
| CN221177356U (en) | Automatic change-over switch of photovoltaic inverter | |
| CN103280953A (en) | Two-circuit power supplying module and two-circuit power supplying inverter | |
| CN220775407U (en) | Control system of parallel-off-grid peak shaving device | |
| CN219999081U (en) | Photovoltaic energy storage green energy power supply unit | |
| CN217607556U (en) | Photovoltaic intelligent box type switch station | |
| CN216252183U (en) | Three-switch control system of micro-grid | |
| CN210806744U (en) | Power access system for accessing generator outlet to peak regulation facility | |
| CN217362658U (en) | Distributed inverter data transmission structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |