CN113922417A - Multi-port converter based on power network and control method thereof - Google Patents
Multi-port converter based on power network and control method thereof Download PDFInfo
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- CN113922417A CN113922417A CN202111160773.2A CN202111160773A CN113922417A CN 113922417 A CN113922417 A CN 113922417A CN 202111160773 A CN202111160773 A CN 202111160773A CN 113922417 A CN113922417 A CN 113922417A
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 230000001105 regulatory effect Effects 0.000 claims abstract description 30
- 238000004146 energy storage Methods 0.000 claims description 30
- 238000010248 power generation Methods 0.000 claims description 29
- 210000001503 joint Anatomy 0.000 claims description 8
- 230000001276 controlling effect Effects 0.000 claims description 2
- 238000003032 molecular docking Methods 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
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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
- 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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
-
- 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
-
- 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
-
- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a multi-port converter based on a power network and a control method thereof, relating to the technical field of micro-grids, wherein an external power supply module can be identified through a multi-port control module, and an acquisition identification unit can also acquire an input voltage Us with the external power supply module; when the input voltage Us is within the input voltage threshold range (U1, U2), the control unit turns on the switch of the external power supply module and the output load end to realize the direct power supply of the external power supply module and the output load end; when the input voltage Us is out of the input voltage threshold range (U1, U2), the control unit sends a regulating signal to the voltage regulating unit; after the voltage regulating unit receives the regulating signal, a transformer in the voltage regulating unit is started, the input voltage Us is regulated to be within an input voltage threshold range (U1, U2), and the requirement can be met by using uniform configuration when the multi-port converter is connected with different energy supply ends.
Description
Technical Field
The invention relates to the technical field of micro-grids, in particular to a multi-port converter based on a power network and a control method thereof.
Background
The direct-current micro-grid can efficiently and reliably receive distributed renewable energy power generation systems such as wind power, light energy and the like, energy storage units, electric vehicles and other direct-current electric loads, so that the direct-current micro-grid is widely applied to practical application. In order to effectively combine the power generation equipment with a plurality of energy storage elements, a multi-port converter is generally needed, and the multi-port converter can utilize a single-stage power conversion unit to connect a plurality of power supplies, so that the multi-port converter can perform centralized control on energy in the energy storage power generation equipment and the plurality of energy storage elements, and the purpose of improving the energy utilization rate is achieved.
However, the conventional multi-port converters all need a large number of switching tubes to ensure normal and stable operation of the multi-port converters, and the multi-port converters usually need different configurations to meet the requirements when being connected with different energy supply ends.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. The control method of the multi-port converter based on the power network can identify an external power supply module through a multi-port control module, an acquisition and identification unit can also acquire an input voltage Us of the external power supply module, and a control unit sets a normal voltage lower limit value U1 and a normal voltage upper limit value U2; when the input voltage Us is within the input voltage threshold range (U1, U2), the control unit turns on the switch of the external power supply module and the output load end to realize the direct power supply of the external power supply module and the output load end; when the input voltage Us is out of the input voltage threshold range (U1, U2), the control unit sends a regulating signal to the voltage regulating unit; after the voltage regulating unit receives the regulating signal, a transformer in the voltage regulating unit is started, the input voltage Us is regulated to be within an input voltage threshold range (U1, U2), and the requirement can be met by using uniform configuration when the multi-port converter is connected with different energy supply ends.
A control method of a multi-port converter based on a power network comprises the following steps:
the method comprises the following steps: the acquisition identification unit identifies a label of a plug connected with the universal change socket and feeds back a successful butt joint signal after identification to complete identification of the external power supply module by the multi-port control module;
step two: the acquisition and identification unit is also used for acquiring an input voltage Us of an external power supply module, and the control unit sets a lower limit value U1 and an upper limit value U2 of the normal voltage;
step three: when the input voltage Us is within the input voltage threshold range (U1, U2), the control unit turns on the switch of the external power supply module and the output load end to realize the direct power supply of the external power supply module and the output load end;
when the input voltage Us is out of the input voltage threshold range (U1, U2), the control unit sends a regulating signal to the voltage regulating unit;
step four: after receiving the adjusting signal, the voltage adjusting unit starts a transformer inside the voltage adjusting unit to adjust the input voltage Us to be within the input voltage threshold range (U1, U2).
Further, the label is embedded in the plug, and the label comprises a photovoltaic label, a wind label and other labels.
Furthermore, the multi-port control module is connected with an energy access end, the multi-port control module is connected with an external power supply module through the energy access end, and the external power supply module comprises a photovoltaic power generation unit, a wind power generation unit and other power supply units.
Further, the power supply device also comprises an energy storage module, when the external load is not connected and the external power supply module is connected with the multi-port control module, the control unit sends an energy storage signal to the energy storage module, and the energy storage module stores electric quantity.
Further, the energy storage module is used for supplying power for the acquisition and identification unit.
The invention also provides a multi-port converter based on the power network.
A multi-port converter based on an electrical power network, comprising:
the energy source access end is a universal change socket, and the universal change socket is used for being connected with a plug of an external power supply module;
the multi-port control module comprises an acquisition identification unit for acquisition identification, a transformer for voltage regulation and a control unit for realizing a control function;
the energy storage module is connected with the multi-port control module, is used for storing electric quantity and is also used for supplying power to the acquisition and identification unit;
and the output load end is used for connecting an external load and is connected with the multi-port control module.
The invention also provides a multiport converter control system based on the power network.
The multi-port converter control system based on the power network comprises an energy access end, a multi-port control module, an energy storage module and an output load end;
the energy access end is used for connecting an external power supply module; the external power supply module comprises a photovoltaic power generation unit, a wind power generation unit and other power supply units, the photovoltaic power generation unit is equipment capable of realizing photovoltaic power generation, the wind power generation unit is equipment capable of generating power through wind power, the other power supply units are equipment capable of directly transmitting power, and the photovoltaic power generation unit, the wind power generation unit and the other power supply units can transmit electric energy to the multi-port control module;
the multi-port control module comprises an acquisition identification unit, a pressure regulating unit and a control unit;
the acquisition and identification unit is used for acquiring a label of a plug connected with the universal change socket and identifying the label;
the acquisition and identification unit is also used for acquiring the input voltage of the external power supply module and sending the acquired input voltage to the control unit, and the control unit performs voltage regulation control on the received input voltage;
the output load end is used for being connected with an external load, when the external load is not connected and the external power supply module is connected with the multi-port control module, the control unit sends an energy storage signal to the energy storage module, the energy storage module stores electric quantity, and the energy storage module is used for supplying power for the acquisition and identification unit.
Compared with the prior art, the invention has the beneficial effects that:
1. the universal change socket is arranged at the energy access end, so that the requirements of inconsistent plugs can be met;
2. when the external load is not connected and the external power supply module is connected with the multi-port control module, the control unit sends an energy storage signal to the energy storage module, the energy storage module stores electric quantity, and the energy storage module is used for supplying power for the acquisition and identification unit. The self-sufficiency of energy sources is realized, and the energy consumption is saved.
3. The acquisition and identification unit can also acquire an input voltage Us of an external power supply module, and the control unit sets a lower limit value U1 and an upper limit value U2 of the normal voltage; when the input voltage Us is within the input voltage threshold range (U1, U2), the control unit turns on the switch of the external power supply module and the output load end to realize the direct power supply of the external power supply module and the output load end; when the input voltage Us is out of the input voltage threshold range (U1, U2), the control unit sends a regulating signal to the voltage regulating unit; after the voltage regulating unit receives the regulating signal, a transformer in the voltage regulating unit is started, and the input voltage Us is regulated to be within an input voltage threshold range (U1, U2) so as to realize the control of the output voltage.
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 the drawings without creative efforts.
Fig. 1 is a flow chart of a control method of a multi-port converter based on a power network according to the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood 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.
A control method of a multi-port converter based on a power network is realized by a control system of the multi-port converter based on the power network.
The multi-port converter control system based on the power network comprises an energy access end, a multi-port control module, an energy storage module and an output load end;
the energy access end is used for connecting an external power supply module; the external power supply module comprises a photovoltaic power generation unit, a wind power generation unit and other power supply units, the photovoltaic power generation unit is equipment capable of realizing photovoltaic power generation, the wind power generation unit is equipment capable of generating power through wind power, the other power supply units are equipment capable of directly transmitting power, and the photovoltaic power generation unit, the wind power generation unit and the other power supply units can transmit electric energy to the multi-port control module; it should be noted that the photovoltaic power generation unit, the wind power generation unit and the other power supply units are all provided with corresponding tags, the tag corresponding to the photovoltaic power generation unit is a "photovoltaic tag", the tag corresponding to the wind power generation unit is a "wind tag", the tags corresponding to the other power supply units are other tags ", and the" photovoltaic tag "," the wind tag "and the other tags" are all embedded in the plug;
it should be noted that the energy access end is a universal variable socket, and consistent or inconsistent plugs may exist in the photovoltaic power generation unit, the wind power generation unit and other power supply units, so that the universal variable socket is arranged at the energy access end, and the requirement of inconsistent plugs can be met;
the multi-port control module comprises an acquisition identification unit, a pressure regulating unit and a control unit;
the acquisition and identification unit is used for acquiring a label connected with a plug on the universal change socket and identifying the label, and particularly, the acquisition and identification unit acquires and identifies the label, and the acquisition and identification unit comprises the following steps:
when a plug is plugged into the universal change socket, the plug is electrically connected with the universal change socket, and the acquisition and identification unit respectively sends tag butt joint signals to the plug; it should be noted that, the tag docking signals correspond to tags one to one, and exemplarily: the label butt joint signals comprise three, namely a wind label butt joint signal, a photovoltaic label butt joint signal and other label butt joint signals; after the wind power tag docking signal, the photovoltaic tag docking signal and the other tag docking signals are docked with the wind power tag, the photovoltaic tag and the other tags, a docking success signal is fed back; the docking success signal internally comprises the type of the docked tag; the docking success signal is fed back to the acquisition and identification unit;
when the label in the successfully-docked signal received by the acquisition and identification unit is a photovoltaic label, the label is a photovoltaic power generation unit connected with the multi-port control module through the universal change socket; other acquisition and identification processes are consistent with those of the photovoltaic power generation unit;
wherein, gather the recognition cell still be used for acquireing with external power supply module's input voltage to input voltage with acquireing sends the input voltage who acquires to the control unit, and the control unit carries out the pressure regulating control to the input voltage who receives, and is specific, the control unit carries out the pressure regulating control process to input voltage and includes following step:
the method comprises the following steps: the acquisition and identification unit acquires input voltage of an external power supply module and sends the input voltage to the control unit, and the control unit marks the input voltage as Us;
step two: the control unit sets an input voltage threshold range (U1, U2); when the input voltage Us is within the input voltage threshold range (U1, U2), the voltage is normal, the control unit directly turns on the switch of the external power supply module and the output load end, and direct power supply of the external power supply module and the output load end is realized; wherein U1 represents the lower limit value of the normal voltage, and U2 represents the upper limit value of the normal voltage;
when the input voltage Us is out of the input voltage threshold range (U1, U2), the voltage is over-range, and the control unit sends a regulating signal to the voltage regulating unit;
step three: after receiving the adjusting signal, the voltage adjusting unit starts a transformer inside the voltage adjusting unit to adjust the input voltage Us to be within the input voltage threshold range (U1, U2).
Note that, the input voltage Us exists outside the input voltage threshold range (U1, U2) in two cases, which are lower than the normal voltage lower limit value U1 and higher than the normal voltage upper limit value U2, respectively.
The output load end is used for being connected with an external load, when the external load is not connected and the external power supply module is connected with the multi-port control module, the control unit sends an energy storage signal to the energy storage module, the energy storage module stores electric quantity, and the energy storage module is used for supplying power for the acquisition and identification unit.
As shown in fig. 1, a method for controlling a multi-port converter based on a power network includes the following steps:
the method comprises the following steps: the acquisition identification unit identifies a label of a plug connected with the universal change socket and feeds back a successful butt joint signal after identification to complete identification of the external power supply module by the multi-port control module;
step two: the acquisition and identification unit is also used for acquiring an input voltage Us of an external power supply module, and the control unit sets a lower limit value U1 and an upper limit value U2 of the normal voltage;
step three: when the input voltage Us is within the input voltage threshold range (U1, U2), the control unit turns on the switch of the external power supply module and the output load end to realize the direct power supply of the external power supply module and the output load end;
when the input voltage Us is out of the input voltage threshold range (U1, U2), the control unit sends a regulating signal to the voltage regulating unit;
step four: after receiving the adjusting signal, the voltage adjusting unit starts a transformer inside the voltage adjusting unit to adjust the input voltage Us to be within the input voltage threshold range (U1, U2).
In the embodiments provided by the present invention, it should be understood that the disclosed apparatus, device and method can be implemented in other ways.
Furthermore, it is obvious that the word "comprising" does not exclude other elements or steps, and the singular does not exclude the plural. A plurality of units or means recited in the system claims may also be implemented by one unit or means in software or hardware. The terms second, etc. are used to denote names, but not any particular order.
Finally, it should be noted that the above examples are only intended to illustrate the technical process of the present invention and not to limit the same, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical process of the present invention without departing from the spirit and scope of the technical process of the present invention.
Claims (6)
1. A multiport converter control method based on a power network is characterized by comprising the following steps:
the method comprises the following steps: the acquisition identification unit identifies a label of a plug connected with the universal change socket and feeds back a successful butt joint signal after identification to complete identification of the external power supply module by the multi-port control module;
step two: the acquisition and identification unit acquires an input voltage Us of an external power supply module, and the control unit sets a lower limit value U1 and an upper limit value U2 of a normal voltage;
step three: when the input voltage Us is within the input voltage threshold range (U1, U2), the control unit turns on the switch of the external power supply module and the output load end to realize the direct power supply of the external power supply module and the output load end;
when the input voltage Us is out of the input voltage threshold range (U1, U2), the control unit sends a regulating signal to the voltage regulating unit;
step four: after receiving the adjusting signal, the voltage adjusting unit starts a transformer inside the voltage adjusting unit to adjust the input voltage Us to be within the input voltage threshold range (U1, U2).
2. A power network based multiport converter control method according to claim 1, characterized in that said tags are embedded inside the plug, said tags including "photovoltaic tags", "wind tags" and "other tags".
3. The method for controlling the multi-port converter based on the power network as claimed in claim 1, wherein the multi-port control module is connected with an energy access terminal, the multi-port control module is connected with an external power supply module through the energy access terminal, and the external power supply module comprises a photovoltaic power generation unit, a wind power generation unit and other power supply units.
4. The multiport converter control method based on the power network is characterized in that the converter further comprises an energy storage module, when an external load is not connected and an external power supply module is connected with the multiport control module, the control unit sends an energy storage signal to the energy storage module, and the energy storage module stores electric quantity.
5. The multi-port converter control method based on the power network is characterized in that the energy storage module is used for supplying power to the acquisition identification unit.
6. A multi-port converter based on an electrical power network, comprising:
the energy source access end is a universal change socket, and the universal change socket is used for being connected with a plug of an external power supply module;
the multi-port control module comprises an acquisition identification unit for acquisition identification, a transformer for voltage regulation and a control unit for realizing a control function;
the energy storage module is connected with the multi-port control module, is used for storing electric quantity and is also used for supplying power to the acquisition and identification unit;
and the output load end is used for connecting an external load and is connected with the multi-port control module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111160773.2A CN113922417A (en) | 2021-09-30 | 2021-09-30 | Multi-port converter based on power network and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111160773.2A CN113922417A (en) | 2021-09-30 | 2021-09-30 | Multi-port converter based on power network and control method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114973613A (en) * | 2022-04-19 | 2022-08-30 | 安徽华昇能源互联网研究院有限公司 | Cable well environment information analysis method based on data acquisition |
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| CN212304008U (en) * | 2020-07-02 | 2021-01-05 | 佛山市远阳五金制品有限公司 | Universal socket |
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2021
- 2021-09-30 CN CN202111160773.2A patent/CN113922417A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100214808A1 (en) * | 2006-01-13 | 2010-08-26 | Cuauhtemoc Rodriguez | Power conditioning unit |
| TW201541795A (en) * | 2014-04-18 | 2015-11-01 | Csi Technology Co Ltd | Automatically regulated power supply device for solar energy and other energy |
| CN106300359A (en) * | 2016-10-26 | 2017-01-04 | 广东工业大学 | A kind of realizing bidirectional electric energy flow type smart jack and operation method thereof |
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| CN114973613A (en) * | 2022-04-19 | 2022-08-30 | 安徽华昇能源互联网研究院有限公司 | Cable well environment information analysis method based on data acquisition |
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Application publication date: 20220111 |