CN111319508A - Multi-energy complementary charging station - Google Patents
Multi-energy complementary charging station Download PDFInfo
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- CN111319508A CN111319508A CN202010104634.7A CN202010104634A CN111319508A CN 111319508 A CN111319508 A CN 111319508A CN 202010104634 A CN202010104634 A CN 202010104634A CN 111319508 A CN111319508 A CN 111319508A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/60—Monitoring or controlling charging stations
- B60L53/67—Controlling two or more charging stations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/50—Charging stations characterised by energy-storage or power-generation means
- B60L53/51—Photovoltaic means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/60—Monitoring or controlling charging stations
- B60L53/63—Monitoring or controlling charging stations in response to network capacity
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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
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
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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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- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/12—Electric charging stations
Abstract
The invention relates to the technical field of power transmission, in particular to a multi-energy complementary charging station, which comprises: the charging pile is used for charging the electric vehicle; a photovoltaic power generation device for converting solar energy into direct current; the energy storage device is connected with the charging pile and the photovoltaic power generation device through a direct current bus, and is used for storing the direct current converted by the photovoltaic power generation device and charging the charging pile; the dispatching management center controls and adjusts the charging power and/or the discharging power of the energy storage device, the photovoltaic power generation device and the charging pile based on the real-time reported information of the multi-energy complementary charging station and the information provided by the distribution network dispatching mechanism, so that the multi-energy complementary charging station generates a buffering effect of peak clipping and valley filling on a power grid, and the operation efficiency and the stability of the power grid are improved.
Description
Technical Field
The invention relates to the technical field of power transmission, in particular to a multi-energy complementary charging station.
Background
Nowadays, the problems of energy safety and environmental pollution are increasingly outstanding, and electric automobiles are valued and developed by many countries or companies due to the advantages of environmental protection, energy conservation, low noise, zero emission and the like. Many countries, including norway, france and china, are preparing to implement ban on fuel automobile production in a short time, which is undoubtedly a great benefit to the development of the electric vehicle industry and a strong incentive to the construction of electric vehicle charging stations. Due to the space-time distribution characteristic of the charging load of the electric vehicle, the electric vehicle is intensively connected into a power distribution network in a large quantity, so that the power distribution network is bound to have larger impact, and the operation efficiency of the power grid is reduced.
Solar energy has the characteristics of wide distribution, large reserve and cleanness and reproducibility, and is another solution for solving the problems of energy safety and environmental pollution. However, the magnitude of the active power output by the photovoltaic array is influenced by external environments such as the solar energy, the temperature and the like and parameters of the photovoltaic array, so that the active power output of the system has certain randomness and volatility. With the increasing proportion of the access capacity of the photovoltaic power generation system to the capacity of the original power system, the uncertainty of the output power of the photovoltaic power generation system brings unprecedented challenges to the safe dispatching and operation of the traditional power system.
Disclosure of Invention
In view of the above, it is necessary to provide a multi-energy complementary charging station capable of improving the operation efficiency and stability of the power grid.
The application provides a complementary charging station of multipotency includes:
the charging pile is used for charging the electric vehicle;
a photovoltaic power generation device for converting solar energy into direct current;
the energy storage device is connected with the charging pile and the photovoltaic power generation device through a direct current bus, and is used for storing the direct current converted by the photovoltaic power generation device and charging the charging pile;
the charging pile, the photovoltaic power generation device and the energy storage device are in communication connection with a dispatching management center, and the dispatching management center controls and adjusts the charging power and/or the discharging power of the energy storage device, the photovoltaic power generation device and the charging pile based on real-time reported information of the multi-energy complementary charging station and information provided by a dispatching mechanism of a power distribution network.
In the multi-energy complementary charging station in the above embodiment, the photovoltaic power generation device is disposed in the multi-energy complementary charging station and is used for absorbing solar energy to generate direct current and transmitting the direct current to the direct current bus, and the photovoltaic power generation device is used as a distributed power source in the multi-energy complementary charging station. The charging pile is characterized in that an energy storage device is connected with the direct-current bus and used for storing electric power or transmitting direct current to the direct-current bus, the energy storage device can store electric energy when the photovoltaic power generation device generates electricity, and the direct-current bus supplies power to the charging pile through the direct-current bus when the supply voltage of the direct-current bus to the charging pile is insufficient, so that the charging pile can still provide high-quality electric energy to an electric vehicle under the condition of power grid peak power supply pressure bearing. Because the charging pile, the photovoltaic power generation device and the energy storage device are arranged and in communication connection with the dispatching management center, the dispatching management center controls and adjusts the charging power and/or the discharging power of the energy storage device, the photovoltaic power generation device and the charging pile based on the real-time reported information of the multi-energy complementary charging station and the information provided by the dispatching mechanism of the distribution network, so that the discharging power and/or the charging power of the photovoltaic power generation device and the energy storage device in the multi-energy complementary charging station can be matched with the actual charging requirement of an electric vehicle and the power supply condition of the power grid, the impact on the power grid caused by the independent operation of the photovoltaic power generation device, the energy storage device and the charging pile is relieved, the multi-energy complementary charging station generates the buffering effect of peak clipping and valley filling on the power grid, and the safety and timeliness of the dispatching of, the operation efficiency and stability of the power grid are improved.
In one embodiment, the real-time reported information of the multi-energy complementary charging station includes the quantity of charging demands, the required electric quantity and the parking time in the multi-energy complementary charging station. The charging demand quantity, the demand electric quantity and the parking time of the multi-energy complementary charging station are reported to a dispatching management center in real time, so that the dispatching management center can control and adjust the charging power and/or the discharging power of the energy storage device, the photovoltaic power generation device and the charging pile according to the real-time electric energy demand condition, the energy storage condition, the discharging condition of the distributed power supply and the real-time operation data of the power grid in the multi-energy complementary charging station, the safety and the timeliness of the power system dispatching are guaranteed, and the operation efficiency and the stability of the power grid are improved.
In one embodiment, the information provided by the power distribution network scheduling mechanism comprises historical load information of the multi-energy complementary charging stations and constraint information of total electric quantity required per day of the multi-energy complementary charging stations. The historical load information of the multi-energy complementary charging station and the constraint information of the total single-day electric quantity required by the multi-energy complementary charging station are acquired, so that the dispatching management center can comprehensively consider the actual operation needs of the multi-energy complementary charging station, and control and adjust the charging power and/or the discharging power of the energy storage device, the photovoltaic power generation device and the charging pile according to the real-time electric energy demand condition, the energy storage condition, the discharging condition of the distributed power supply and the real-time power grid operation data in the multi-energy complementary charging station, so that the safety and timeliness of electric power system dispatching are ensured, and the operation efficiency and the stability of the power grid are improved.
In one embodiment, the controlling and adjusting of the charging and discharging powers of the charging pile, the photovoltaic power generation device and the energy storage device by the dispatching management center includes:
and summing the difference values of the actual load curve and the expected load curve of the multi-energy complementary charging station to obtain a difference value Q.
And controlling and adjusting the charging and discharging power of the charging pile and the energy storage device to enable the difference value and Q to reach the minimum value.
In one embodiment, the gap value Q is calculated according to the following formula:
wherein the content of the first and second substances,
the charging power of the energy storage device and the charging equipment at the moment t respectively;
the generated power of the photovoltaic power generation device at the moment t;
the load at the time t of the expected load curve; omegatThe charging demand set at the moment t in the multi-energy complementary charging station is obtained;
charging power for the ith charging demand.
In one embodiment, the charging post comprises:
the rapid charging pile is connected with the direct current bus of the multi-energy complementary charging station and is used for rapidly charging the electric vehicle;
and the slow charging pile is connected with the direct current bus of the multi-energy complementary charging station and is used for charging the electric vehicle at a slow speed.
In the embodiment, the multi-energy complementary charging station can be set for construction of a rapid charging pile on the road, so that a user can conveniently enter the station for charging; the slow charging pile can be arranged on the inner side of the multifunctional complementary charging station and used for charging electric vehicles at a slow speed, and the slow charging pile is arranged to occupy the land with a lower price due to the fact that the slow charging cost of a user is lower.
In one embodiment, the energy storage device is disposed below ground within the multi-energy complementary charging station. The energy storage facility is arranged below the charging station, so that the land utilization rate is increased, and the operation benefit of the multi-energy complementary charging station is increased.
In one embodiment, the photovoltaic power generation device comprises a solar panel disposed on a roof top surface of the multi-energy complementary charging station. The solar cell panel is arranged on the top surface of the roof of the multi-energy complementary charging station, so that solar energy can be better absorbed.
In one embodiment, the multi-energy complementary charging station further comprises a DC-DC converter, and the photovoltaic power generation device, the energy storage device and the charging pile are respectively connected with the DC bus through the DC-DC converter.
In one embodiment, the multi-energy complementary charging station further comprises a DC-AC bidirectional converter, and the DC bus is connected to a power grid through the DC-AC bidirectional converter and is used for obtaining electric energy from the power grid or delivering redundant electric energy to the power grid.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain drawings of other embodiments based on these drawings without any creative effort.
Fig. 1 is a schematic diagram of an architecture of a multi-energy complementary charging station according to an embodiment of the present application.
Fig. 2 is a schematic diagram of a multi-energy complementary charging station according to another embodiment of the present disclosure.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are illustrated in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Where the terms "comprising," "having," and "including" are used herein, another element may be added unless an explicit limitation is used, such as "only," "consisting of … …," etc. Unless mentioned to the contrary, terms in the singular may include the plural and are not to be construed as being one in number.
In this application, unless otherwise expressly stated or limited, the terms "connected" and "connecting" are to be construed broadly, e.g., as meaning directly connected to one another or indirectly connected through intervening media, whether internal or external to one another, or whether a combination of two or more elements is in operative relationship; which may be a mechanical connection, a communicative connection, an electrical connection, or the like. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
As shown in fig. 1, in a multi-energy complementary charging station provided in an embodiment of the present application, a charging pile 10, a photovoltaic power generation device 20, and an energy storage device 30 are included. The charging post 10 may be configured to be connected to the dc bus 100 of the multi-energy complementary charging station for charging the electric vehicle; the photovoltaic power generation device 20 is configured to convert solar energy into direct current and transmit the direct current to the direct current bus 100; the energy storage device 30 is connected to the charging pile 10 and the photovoltaic power generation device 20 via the dc bus 100, and the energy storage device 30 is used for storing the dc power converted by the photovoltaic power generation device 20 and charging the charging pile 10. The charging pile 10, the photovoltaic power generation device 20 and the energy storage device 30 are in communication connection with a dispatching management center 40, and the dispatching management center 40 controls and adjusts the charging power and/or the discharging power of the energy storage device 30, the photovoltaic power generation device 20 and the charging pile 10 based on the real-time reported information of the multi-energy complementary charging station and the information provided by a dispatching mechanism of a power distribution network.
Specifically, in the multi-energy complementary charging station in the above embodiment, the photovoltaic power generation device 20 is disposed in the multi-energy complementary charging station, so that the photovoltaic power generation device 20 is connected to the dc bus 100 in the multi-energy complementary charging station, and is used for absorbing solar energy to generate dc power and transmitting the dc power to the dc bus 100, and the photovoltaic power generation device 20 is used as a distributed power source in the multi-energy complementary charging station. Set up energy memory 30 and be connected with DC bus 100 for through DC bus 100 storage electric power or to DC bus 100 transport direct current, energy memory 30 can store the electric energy when photovoltaic power generation device generates electricity, via DC bus 100 to filling electric pile 10 power supply when DC bus 100 is not enough to the supply voltage who fills electric pile 10, so that fill electric pile 10 still can provide high-quality electric energy to electric vehicle under the circumstances of electric wire netting 200 power consumption peak power supply pressure-bearing. Because the charging pile 10, the photovoltaic power generation device 20 and the energy storage device 30 are arranged to be in communication connection with the dispatching management center 40, the dispatching management center 40 controls and adjusts the charging power and/or the discharging power of the energy storage device 30, the photovoltaic power generation device 20 and the charging pile 10 based on the real-time reported information of the multi-energy complementary charging station and the information provided by the dispatching mechanism of the distribution network, so that the discharging power and/or charging power of the photovoltaic power generation device 20 and the energy storage device 30 in the multi-energy complementary charging station can be matched with the actual charging requirement of the electric vehicle and the power supply condition of the power grid, the impact on the power grid 200 caused by the independent operation of the photovoltaic power generation device 20, the energy storage device 30 and the charging pile 10 is relieved, the multi-energy complementary charging station has a buffering effect of peak clipping and valley filling on the power grid, the safety and timeliness of power system scheduling are guaranteed, and the operating efficiency and stability of the power grid are improved.
Specifically, in an embodiment of the present application, the real-time reported information of the multi-energy complementary charging station includes a charging demand amount, a demand electric quantity, and a parking time in the multi-energy complementary charging station. The charging demand quantity, the demand electric quantity and the parking time of the multi-energy complementary charging station are reported to a dispatching management center in real time, so that the dispatching management center can control and adjust the charging power and/or the discharging power of the energy storage device, the photovoltaic power generation device and the charging pile according to the real-time electric energy demand condition, the energy storage condition, the discharging condition of the distributed power supply and the real-time operation data of the power grid in the multi-energy complementary charging station, the safety and the timeliness of the power system dispatching are guaranteed, and the operation efficiency and the stability of the power grid are improved.
Specifically, in one embodiment of the present application, the information provided by the power distribution network scheduling mechanism includes historical load information of the multi-energy complementary charging stations and total required electricity per day constraint information of the multi-energy complementary charging stations. The historical load information of the multi-energy complementary charging station and the constraint information of the total single-day electric quantity required by the multi-energy complementary charging station are acquired, so that the dispatching management center can comprehensively consider the actual operation needs of the multi-energy complementary charging station, and control and adjust the charging power and/or the discharging power of the energy storage device, the photovoltaic power generation device and the charging pile according to the real-time electric energy demand condition, the energy storage condition, the discharging condition of the distributed power supply and the real-time power grid operation data in the multi-energy complementary charging station, so that the safety and timeliness of electric power system dispatching are ensured, and the operation efficiency and the stability of the power grid are improved.
Further, in an embodiment of the present application, the controlling and adjusting the charging and discharging powers of the charging pile, the photovoltaic power generation device, and the energy storage device by the scheduling management center includes:
and summing the difference values of the actual load curve and the expected load curve of the multi-energy complementary charging station to obtain a difference value Q.
And controlling and adjusting the charging and discharging power of the charging pile and the energy storage device to enable the difference value and Q to reach the minimum value.
In one embodiment, the gap value Q is calculated according to the following formula:
wherein the content of the first and second substances,
the energy storage device and the charging are respectively at the moment tA charging power of the device;
the generated power of the photovoltaic power generation device at the moment t;
the load at the time t of the expected load curve; omegatThe charging demand set at the moment t in the multi-energy complementary charging station is obtained;
charging power for the ith charging demand.
In the above embodiment, the scheduling management center performs charging and discharging control on the energy storage device and the charging pile in the multi-energy complementary charging station according to the real-time reported information of the charging station and the information provided by the distribution network scheduling mechanism. The real-time reported information of the multi-energy complementary charging station comprises the quantity of charging demands in the charging station, the required electric quantity of the charging demands and parking time information. The information provided by the power distribution network scheduling mechanism may be: and according to the historical load information, a charging station expected load curve is formulated by taking the minimum operation cost of the power distribution network as a target and considering the constraint of the total required electric quantity per day of the charging station. In other embodiments of the present application, the distribution network dispatching mechanism may formulate the charging station load curve with other objective functions that reduce the cost of the distribution network.
Further, in a multi-energy complementary charging station provided in an embodiment of the present application, as shown in fig. 2, the charging pile 10 includes a fast charging pile 11 and a slow charging pile 12. The rapid charging pile 11 is connected with the direct current bus 100 of the multi-energy complementary charging station and is used for rapidly charging the electric vehicle; the slow charging pile 12 is connected with the direct current bus 100 of the multi-energy complementary charging station and is used for slowly charging the electric vehicle.
Specifically, in the multi-energy complementary charging station in the above embodiment, the rapid charging pile 11 can be set for construction on the road, which is convenient for the user to enter the station for charging; the slow charging pile 12 can be arranged to be built on the inner side of the multifunctional complementary charging station, and the slow charging cost of a user is low, so that the land with a low price is occupied. In other embodiments of the present application, the slow charging piles 12 may be disposed on different floors of the multi-energy complementary charging station, and the electric vehicle may be lifted to a suitable floor for charging by the elevator.
Further, in the multi-energy complementary charging station in the above embodiment, the energy storage device is disposed under the ground in the multi-energy complementary charging station, so that a land utilization rate is increased, and an operation benefit of the multi-energy complementary charging station is increased. The energy storage device can be formed by connecting lead-acid storage batteries in series and in parallel, and plays a role in storing and regulating energy in the multi-energy complementary charging station.
Further, in the multi-energy complementary charging station in the above embodiments, the photovoltaic power generation device includes a solar panel, and the solar panel is disposed on a roof top surface of the multi-energy complementary charging station. The solar cell panel is arranged on the roof top surface of the multi-energy complementary charging station and comprises a plurality of solar cell panels which are connected in series and/or in parallel so as to better absorb solar energy.
Further, in the multi-energy complementary charging station provided in an embodiment of the present application, as shown in fig. 2, a Direct Current to Direct Current (DC-DC) converter 50 is further included, and the photovoltaic power generation device 20, the energy storage device 30 and the charging pile 10 are respectively connected to a DC bus 100 through the DC-DC converter 50, so as to perform electric energy interaction through the DC bus.
Further, in the multi-energy complementary charging station in the above embodiment, as shown in fig. 2, the multi-energy complementary charging station further includes a Direct Current to Alternating Current (DC-AC) bidirectional converter 60, the DC bus 100 is connected to the power grid 200 through the DC-AC bidirectional converter 60, and the DC bus 100 obtains electric energy from the power grid 200 or transmits redundant electric energy to the power grid 200. The power missing or excess from the DC bus 100 is taken from the grid 200 or delivered to the grid 200 through the DC-AC bi-directional converter 60.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A multi-energy complementary charging station, comprising:
the charging pile is used for charging the electric vehicle;
a photovoltaic power generation device for converting solar energy into direct current;
the energy storage device is connected with the charging pile and the photovoltaic power generation device through a direct current bus, and is used for storing the direct current converted by the photovoltaic power generation device and charging the charging pile;
the charging pile, the photovoltaic power generation device and the energy storage device are in communication connection with a dispatching management center, and the dispatching management center controls and adjusts the charging power and/or the discharging power of the energy storage device, the photovoltaic power generation device and the charging pile based on real-time reported information of the multi-energy complementary charging station and information provided by a dispatching mechanism of a power distribution network.
2. The station of claim 1, wherein the real-time reported information of the station includes the amount of charging demand, the amount of power demand, and the time of parking in the station.
3. The multi-energy complementary charging station of claim 2, wherein the information provided by the power distribution network scheduling mechanism comprises historical load information for the multi-energy complementary charging station and total required charge per day constraint information for the multi-energy complementary charging station.
4. The multi-energy complementary charging station according to claim 3, wherein the control and adjustment of the charging and discharging powers of the charging pile, the photovoltaic power generation device and the energy storage device by the dispatching management center comprises:
summing the difference values of the actual load curve and the expected load curve of the multi-energy complementary charging station to obtain a difference value Q;
and controlling and adjusting the charging and discharging power of the charging pile and the energy storage device to enable the difference value and Q to reach the minimum value.
5. The multi-energy complementary charging station of claim 4, wherein the gap value Q is calculated according to the following formula:
wherein the content of the first and second substances,
the charging power of the energy storage device and the charging equipment at the moment t respectively;
the generated power of the photovoltaic power generation device at the moment t;
the load at the time t of the expected load curve; omegatThe charging demand set at the moment t in the multi-energy complementary charging station is obtained;
charging power for the ith charging demand.
6. The multi-energy complementary charging station according to any one of claims 1-5, wherein the charging pole comprises:
the rapid charging pile is connected with the direct current bus of the multi-energy complementary charging station and is used for rapidly charging the electric vehicle;
and the slow charging pile is connected with the direct current bus of the multi-energy complementary charging station and is used for charging the electric vehicle at a slow speed.
7. The multi-energy complementary charging station of any one of claims 1-5, wherein the energy storage device is disposed below ground within the multi-energy complementary charging station.
8. The multi-energy complementary charging station of any one of claims 1-5, wherein the photovoltaic power generation device comprises a solar panel disposed on a roof top surface of the multi-energy complementary charging station.
9. The multi-energy complementary charging station of any one of claims 1-5, further comprising a DC-DC converter, wherein the photovoltaic power generation device, the energy storage device and the charging post are connected to the DC bus via the DC-DC converter.
10. The multi-energy complementary charging station of any one of claims 1-5, further comprising a DC-AC bidirectional converter, wherein the DC bus is connected to a power grid through the DC-AC bidirectional converter for drawing power from the power grid or delivering excess power to the power grid.
Priority Applications (1)
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Application publication date: 20200623 |