CN114123519B - Intelligent energy storage power station system - Google Patents
Intelligent energy storage power station system Download PDFInfo
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- CN114123519B CN114123519B CN202111228652.7A CN202111228652A CN114123519B CN 114123519 B CN114123519 B CN 114123519B CN 202111228652 A CN202111228652 A CN 202111228652A CN 114123519 B CN114123519 B CN 114123519B
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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
- H02J15/00—Systems for storing electric energy
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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
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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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
- H02J3/381—Dispersed generators
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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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- 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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- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention relates to an intelligent energy storage power station system, which comprises: the solar cell panel is electrically connected with a selection switch circuit through a first direct-current and alternating-current inverter, and the first direct-current and alternating-current inverter inverts the electric energy converted by the solar cell panel into alternating current; the selection switch circuit is connected with a low-voltage line network, an alternating current-direct current inverter and a PLC controller, and the low-voltage line network is electrically connected with the user side; the alternating current-direct current inverter is electrically connected with the charging and discharging battery pack and the PLC, the alternating current-direct current inverter inverts the electric energy converted by the solar cell panel into direct current and stores the direct current into the charging and discharging battery pack, the PLC is electrically connected with a second direct current-alternating current inverter, the charging and discharging battery pack is electrically connected to a low-voltage line network through the second direct current-alternating current inverter, and the second direct current-alternating current inverter inverts the electric energy stored in the charging and discharging battery pack into alternating current and transmits the alternating current to the low-voltage line network; the PLC is also electrically connected with transformer information acquisition equipment and the first direct current inverter.
Description
Technical Field
The invention belongs to the technical field of solar power supply, and particularly relates to an intelligent energy storage power station system.
Background
Solar energy has been widely used in power supply systems as a clean energy source, however, in the prior art, the electric energy generated by solar energy conversion can only be connected to the side of a 10kV high-voltage line, but the power supply is not performed by solar energy on the side of a 0.4kV low-voltage line.
After the solar energy is converted into electric energy, the electric energy is applied to the side of a high-voltage line of 10kV, a large amount of loss still exists in the long-distance transportation process, and the utilization efficiency of the clean energy of the solar energy is not very high. This is a disadvantage of the prior art.
In view of this, the invention provides an intelligent energy storage power station system used at a low voltage side of 0.4kV, so as to solve the technical blank of applying solar energy at a low voltage side of 0.4 kV.
Disclosure of Invention
The invention aims to provide an intelligent energy storage power station system aiming at the defects in the prior art so as to solve the technical problems.
In order to realize the purpose, the invention provides the following technical scheme:
an intelligent energy storage power station system comprising:
the solar cell panel is electrically connected with a selection switch circuit through a first direct current-alternating current inverter, and the first direct current-alternating current inverter inverts the electric energy converted by the solar cell panel into alternating current; the selection switch circuit is connected with a low-voltage line network, an alternating current-direct current inverter and a PLC (programmable logic controller), and the low-voltage line network is electrically connected with a user side;
the alternating current-direct current inverter is electrically connected with the charging and discharging battery pack and the PLC, the alternating current-direct current inverter inverts the electric energy converted by the solar cell panel into direct current to be stored in the charging and discharging battery pack, the PLC is electrically connected with a second alternating current-direct current inverter, the charging and discharging battery pack is electrically connected to a low-voltage line network through the second alternating current-direct current inverter, and the second alternating current-direct current inverter inverts the electric energy stored in the charging and discharging battery pack into alternating current to be transmitted to the low-voltage line network;
the PLC is also electrically connected with transformer information acquisition equipment and the first direct current inverter.
Preferably, the transformer information acquisition equipment comprises a voltage sensor and a current sensor; collecting voltage information and current information of the transformer as a basis for selecting a switch circuit by the PLC; and the PLC controls the on-off of the selection switch circuit according to the voltage information and the current information of the transformer.
Preferably, a disconnecting switch is arranged between the transformer and the low-voltage line network, and the disconnecting switch is electrically connected with the PLC; the power supply between the transformer and the low-voltage network is cut off by means of a cut-off switch.
Preferably, when the electric energy converted by the solar panel is enough to supply the electric energy consumption of the user side in the low-voltage line network, the PLC controller controls the disconnecting switch to disconnect the power supply connection between the transformer and the low-voltage line network, controls the selection switch circuit to connect the first direct-current inverter and the low-voltage line network, and supplies the power to the user side through the electric energy converted by the solar panel.
Preferably, when the power supply user end converted by the solar panel still has surplus power, the PLC controller controls the selection switch circuit to connect the first direct current inverter and the alternating current-direct current inverter so as to charge the charging and discharging battery pack.
Preferably, when the transformer fails, the PLC controller controls the disconnecting switch to disconnect the power supply connection between the transformer and the low-voltage line network, the PLC controller controls the selection switch circuit to connect the first direct-current inverter and the low-voltage line network, and the user side is supplied with power through electric energy converted by the solar panel; or the PLC controller controls the selection switch circuit to communicate the first direct current inverter with the low-voltage line network, the user side is supplied with power through the electric energy converted by the solar cell panel, and meanwhile, the second direct current inverter is controlled to convert the electric energy stored in the charge-discharge battery pack into alternating current to supply power to the user side.
Preferably, when the voltage of the transformer is not enough to meet the power consumption requirement of the user side, the PLC controls the selection switch circuit to communicate the first direct current inverter with the low-voltage line network, and the power supply is performed on the user side through the electric energy converted by the solar panel; or the PLC controller controls the second direct-current and alternating-current inverter to convert the electric energy stored in the charging and discharging battery pack into alternating current to supply power to the user side; or the PLC controls the second direct-current inverter to convert the electric energy stored in the charging and discharging battery pack into alternating current to supply power to the user side while controlling the selection switch circuit to communicate the first direct-current inverter with the low-voltage line network.
Preferably, the voltage sensor is a TL900-A/3U type voltage sensor, the current sensor is an HS-ZI11/100 type current sensor, and the detection precision is high.
The low-voltage circuit network in the technical scheme is a line network between the low-voltage side of the transformer and the user side.
The solar energy conversion system has the beneficial effects that by adopting the technical means of the technical scheme, the electric energy converted by the solar cell is directly accessed to the low-voltage side of the transformer, and the electric energy converted by the solar cell is stored or directly transmitted to the line user side of the low-voltage side of the transformer according to the power supply capacity of the transformer; the defect of solar power supply at the low-voltage side of the transformer in the prior art is effectively overcome. In addition, the invention has reliable design principle, simple structure and very wide application prospect.
Therefore, compared with the prior art, the invention has prominent substantive features and remarkable progress, and the beneficial effects of the implementation are also obvious.
Drawings
Fig. 1 is a schematic block diagram of an intelligent energy storage power station system provided by the invention.
The system comprises a solar cell panel 1, a first direct current inverter 2, a selection switch circuit 3, a low-voltage line network 4, an alternating current-direct current inverter 5, a PLC controller 6, a user terminal 7, a charging and discharging battery pack 8, a second direct current-direct current inverter 9, a transformer information acquisition device 10, a disconnecting switch 11 and a transformer 12.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings by way of specific examples, which are illustrative of the present invention and are not limited to the following embodiments.
As shown in fig. 1, the present embodiment provides an intelligent energy storage power station system, which includes:
the solar cell panel comprises a solar cell panel 1, wherein the solar cell panel 1 is electrically connected with a selective switch circuit 3 through a first direct current-to-alternating current inverter 2, and the first direct current-to-alternating current inverter 2 inverts electric energy converted by the solar cell panel 1 into alternating current; the selection switch circuit 3 is connected with a low-voltage line network 4, an alternating current-direct current inverter 5 and a PLC (programmable logic controller) 6, and the low-voltage line network 4 is electrically connected with a user terminal 7;
the alternating current-direct current inverter 5 is electrically connected with a charging and discharging battery pack 8 and the PLC controller 6, the alternating current-direct current inverter 5 inverts the electric energy converted by the solar cell panel 1 into direct current to be stored in the charging and discharging battery pack 8, the PLC controller 6 is electrically connected with a second alternating current-direct current inverter 9, the charging and discharging battery pack 8 is electrically connected to the low-voltage line network 4 through the second alternating current-direct current inverter 9, and the second alternating current-direct current inverter 9 inverts the electric energy stored in the charging and discharging battery pack 8 into alternating current to be transmitted to the low-voltage line network 4;
the PLC 6 is also electrically connected with a transformer information acquisition device 10 and the first direct current inverter 2; the transformer information acquisition equipment 10 comprises a voltage sensor and a current sensor; collecting voltage information and current information of the transformer as a basis for the PLC 6 to select the switch circuit 3; the PLC 6 controls the on-off of the selection switch circuit 3 according to the voltage information and the current information of the transformer 12; a disconnecting switch 11 is arranged between the transformer 12 and the low-voltage line network 4, and the disconnecting switch 11 is electrically connected with the PLC controller 6; the supply of power between the transformer 12 and the low-voltage network 4 is cut off by means of a cut-off switch 11.
When the electric energy converted by the solar panel 1 is enough to supply the electric energy consumption of the user side in the low-voltage line network 4, the PLC controller controls the disconnecting switch to disconnect the power supply connection between the transformer and the low-voltage line network, controls the selection switch circuit to connect the first direct current inverter and the low-voltage line network, and supplies power to the user side through the electric energy converted by the solar panel.
When the electric energy converted by the solar cell panel is still remained at the user side, the PLC controls the selection switch circuit to connect the first direct current inverter and the alternating current-direct current inverter so as to charge the charging and discharging battery pack.
When the transformer fails, the PLC controls the disconnecting switch to disconnect the power supply connection between the transformer and the low-voltage line network, the PLC controls the selection switch circuit to connect the first direct-current inverter and the low-voltage line network, and the power supply is performed on the user side through the electric energy converted by the solar panel; or the PLC controller controls the selection switch circuit to communicate the first direct current inverter with the low-voltage line network, the user side is supplied with power through the electric energy converted by the solar cell panel, and meanwhile, the second direct current inverter is controlled to convert the electric energy stored in the charge-discharge battery pack into alternating current to supply power to the user side.
When the voltage of the transformer is not enough to meet the power consumption requirement of a user side, the PLC controls the selection switch circuit to connect the first direct current inverter with the low-voltage line network, and the power supply is carried out on the user side through the electric energy converted by the solar cell panel; or the PLC controller controls the second direct-current and alternating-current inverter to convert the electric energy stored in the charging and discharging battery pack into alternating current to supply power to the user side; or the PLC controller controls the selection switch circuit to communicate the first direct-current inverter with the low-voltage line network, and controls the second direct-current inverter to convert the electric energy stored in the charging and discharging battery pack into alternating current to supply power to the user side.
The voltage sensor is a TL900-A/3U type voltage sensor, the current sensor is an HS-ZI11/100 type current sensor, and detection precision is high.
The low-voltage circuit network in the technical scheme is a line network between the low-voltage side of the transformer and the user side.
The above disclosure is only for the preferred embodiments of the present invention, but the present invention is not limited thereto, and any non-inventive changes that can be made by those skilled in the art and several modifications and amendments made without departing from the principle of the present invention shall fall within the protection scope of the present invention.
Claims (1)
1. An intelligent energy storage power station system, comprising:
the solar cell panel is electrically connected with a selection switch circuit through a first direct current-alternating current inverter, and the first direct current-alternating current inverter inverts the electric energy converted by the solar cell panel into alternating current; the selection switch circuit is connected with a low-voltage line network, an alternating current-direct current inverter and a PLC (programmable logic controller), and the low-voltage line network is electrically connected with a user side;
the alternating current-direct current inverter is electrically connected with the charging and discharging battery pack and the PLC, the alternating current-direct current inverter inverts the electric energy converted by the solar cell panel into direct current to be stored in the charging and discharging battery pack, the PLC is electrically connected with a second alternating current-direct current inverter, the charging and discharging battery pack is electrically connected to a low-voltage line network through the second alternating current-direct current inverter, and the second alternating current-direct current inverter inverts the electric energy stored in the charging and discharging battery pack into alternating current to be transmitted to the low-voltage line network;
the PLC is also electrically connected with transformer information acquisition equipment and the first direct current inverter;
the transformer information acquisition equipment comprises a voltage sensor and a current sensor; collecting voltage information and current information of the transformer as a basis for controlling the selection switch circuit by the PLC; the PLC controls the on-off of the selection switch circuit according to the voltage information and the current information of the transformer;
a disconnecting switch is arranged between the transformer and the low-voltage line network and is electrically connected with the PLC;
when the electric energy converted by the solar panel is enough to supply the electric energy consumption of the user side in the low-voltage line network, the PLC controller controls the disconnecting switch to disconnect the power supply connection between the transformer and the low-voltage line network, controls the selection switch circuit to connect the first direct current inverter and the low-voltage line network, and supplies power to the user side through the electric energy converted by the solar panel;
when the electric energy converted by the solar cell panel is still remained at the user side, the PLC controller controls the selection switch circuit to connect the first direct current inverter and the alternating current-direct current inverter so as to charge the charging and discharging battery pack;
when the transformer fails, the PLC controller controls the disconnecting switch to disconnect the power supply connection between the transformer and the low-voltage line network, the PLC controller controls the selection switch circuit to connect the first direct-current inverter and the low-voltage line network, and the user side is supplied with power through electric energy converted by the solar panel; or the PLC controller controls the selection switch circuit to communicate the first direct current inverter with the low-voltage line network, the user side is supplied with power through the electric energy converted by the solar panel, and meanwhile, the second direct current inverter is controlled to convert the electric energy stored in the charge-discharge battery pack into alternating current to supply power to the user side;
when the voltage of the transformer is not enough to meet the power consumption requirement of a user side, the PLC controls the selection switch circuit to connect the first direct current inverter with the low-voltage line network, and the power supply is carried out on the user side through the electric energy converted by the solar cell panel; or the PLC controller controls the second direct-current and alternating-current inverter to convert the electric energy stored in the charging and discharging battery pack into alternating current to supply power to the user side; or the PLC controller controls the selection switch circuit to communicate the first direct-current inverter with the low-voltage line network, and controls the second direct-current inverter to convert the electric energy stored in the charging and discharging battery pack into alternating current to supply power to the user side;
the voltage sensor is a TL900-A/3U type voltage sensor, and the current sensor is an HS-ZI11/100 type current sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111228652.7A CN114123519B (en) | 2021-10-21 | 2021-10-21 | Intelligent energy storage power station system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111228652.7A CN114123519B (en) | 2021-10-21 | 2021-10-21 | Intelligent energy storage power station system |
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| CN114123519A CN114123519A (en) | 2022-03-01 |
| CN114123519B true CN114123519B (en) | 2022-10-28 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111199292A (en) * | 2018-10-31 | 2020-05-26 | 法国电力公司 | Ensuring safe maintenance in a low voltage network of a power distribution system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104113133B (en) * | 2014-07-01 | 2016-10-05 | 广东易事特电源股份有限公司 | Intelligent photovoltaic off-network inverter system and power consumption control method thereof |
| CN205992786U (en) * | 2016-05-25 | 2017-03-01 | 天宏阳光新能源投资有限公司 | Electric automobile charging station |
| CN106230017A (en) * | 2016-08-01 | 2016-12-14 | 芜湖格利特新能源科技有限公司 | A kind of low-loss distributed photovoltaic power generation micro-grid system |
| CN107579698A (en) * | 2017-10-03 | 2018-01-12 | 常州工学院 | A kind of photovoltaic plant energy storage method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111199292A (en) * | 2018-10-31 | 2020-05-26 | 法国电力公司 | Ensuring safe maintenance in a low voltage network of a power distribution system |
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