CN107221944B - Light stores up and fills and integrative system - Google Patents
Light stores up and fills and integrative system Download PDFInfo
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- CN107221944B CN107221944B CN201710648498.6A CN201710648498A CN107221944B CN 107221944 B CN107221944 B CN 107221944B CN 201710648498 A CN201710648498 A CN 201710648498A CN 107221944 B CN107221944 B CN 107221944B
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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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- 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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- 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
Abstract
The invention provides an optical storage and integration system, wherein the system comprises: the charging piles (1) are used for charging the electric automobile (C) or taking electricity from the electric automobile (C); a direct current bus (2) connected with the charging pile (1) and used for transmitting electric energy to the electric automobile (C) or receiving electric energy from the electric automobile (C); the storage battery (3) is connected with the direct current bus (2) and is used for storing electric energy on the direct current bus (2) or conveying electric energy to the direct current bus (2); an AC/DC converter (4) connected to a utility grid (P) and to the DC bus (2) for transferring electrical energy on the DC bus (2) to the utility grid (P) or to the DC bus (2). The invention relieves the impact on the public power grid caused by the centralized charging of the electric automobile in the peak period of electricity consumption, and has high energy utilization rate.
Description
Technical Field
The invention relates to the field of new energy automobiles, in particular to an optical storage and filling integrated technology, and specifically relates to an optical storage and filling integrated system.
Background
The development and utilization of new energy are focused in countries around the world facing the current situation of environmental pollution and resource shortage. The electric automobile is taken as one of main research directions in new energy concepts, and brings a new travel mode for life of people. The rapid development of electric vehicles makes the construction of infrastructure (including charging piles) of electric vehicles particularly important.
However, if the charging piles are densely built in a certain area and a large number of electric vehicles are charged at the same time, the impact on the power grid is very large. Specifically, the power consumption of industrial and agricultural production and life is large in daytime, and electric vehicles are mainly on the road in daytime, and if a large number of electric vehicles in a certain area are charged simultaneously, the impact on a commercial power grid (public power grid) is particularly large.
In order to control the electricity consumption in the electricity consumption peak period and reduce the influence of electric automobile charging on a power grid, a plurality of cities carry out sectional electricity prices, namely, the peak electricity price is carried out in the electricity consumption peak period (usually from 8:00 am to 22:00 pm); during the off-peak period of electricity consumption (typically from 22:00 pm to 8:00 pm), off-peak electricity prices are carried out.
Although the method limits the daytime charging of the electric automobile to a certain extent, for the electric automobile owners charged at night, the method can not obtain extra benefit except for slightly low electricity price, the stimulation force to the electric automobile owners is far insufficient, and few electric automobile owners can unexpectedly charge at night. In addition, the electric automobile needing to be charged in the electricity utilization peak stage can only take electricity from the commercial power grid, and cannot take electricity from other electric automobiles or energy storage systems, so that the impact of concentrated charging of the electric automobile on the commercial power grid cannot be fundamentally solved only by means of the time-of-day electricity price.
Therefore, a person skilled in the art needs to develop an optical storage and charging integrated system integrating functions of photovoltaic, energy storage, charging and grid connection, so as to fundamentally solve the impact of concentrated charging of electric vehicles on a commercial power grid.
Disclosure of Invention
In view of the above, the technical problem to be solved by the invention is to provide an optical storage and charging integrated system, which solves the problem that the electric automobile is intensively charged to impact a public power grid when electricity consumption is high in the prior art.
In order to solve the above technical problems, a specific embodiment of the present invention provides an optical storage and integration system, including: the charging piles are used for charging the electric automobile or taking electricity from the electric automobile; the direct current bus is connected with the charging pile and used for transmitting electric energy to the electric automobile or receiving electric energy from the electric automobile; the storage battery is connected with the direct current bus and used for storing electric energy on the direct current bus or transmitting electric energy to the direct current bus; and the AC/DC converter is connected with a public power grid and the direct current bus and is used for transmitting the electric energy on the direct current bus to the public power grid or transmitting the electric energy on the public power grid to the direct current bus.
According to the above specific embodiments of the present invention, the optical storage and integration system has at least the following advantages: the storage battery stores electricity from the clean energy power generation unit at first and then stores electricity from a public power grid when electricity consumption is low and the storage battery is insufficient; when the electricity consumption is high, the electric automobile firstly takes electricity from the clean energy power generation unit, then takes electricity from the storage battery, secondly takes electricity from other electric automobiles and finally takes electricity from the public power grid, so the electric automobile can be charged at low electricity price (electricity consumption is low), the electric automobile owner can earn a gap when the electricity consumption is high, the electric automobile owner is promoted to charge the electric automobile at the electricity consumption is low, the electricity is sold at the electricity consumption is high, the light is supplied to the light to store and charge the integrated system, the light is stored and the integrated system charges other electric automobiles, and therefore the impact caused to the public power grid when the electric automobile is intensively charged at the electricity consumption peak period is relieved. The storage battery stores the electric energy generated by the clean energy power generation unit, and the electric automobile is used or stored in the storage battery, so that the impact on a public power grid caused by centralized charging of the electric automobile in the electricity utilization peak period is further relieved, the electric automobile is clean and environment-friendly, and the energy utilization rate is high.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the scope of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and, together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic structural diagram of an embodiment of an integrated optical storage and filling system according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a second embodiment of an integrated optical storage and filling system according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a third embodiment of an integrated optical storage and filling system according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of an embodiment four of an optical storage and integration system according to an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a fifth embodiment of an integrated optical storage and filling system according to an embodiment of the present invention.
Reference numerals illustrate:
1. charging pile 2 direct current bus
3. Storage battery 4 AC/DC converter
5. Clean energy power generation unit 6 energy storage DC/DC unit
7. Control unit 8 electric energy recovery unit
P public electric network C electric automobile
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the spirit of the present disclosure will be clearly described in the following drawings and detailed description, and any person skilled in the art, after having appreciated the embodiments of the present disclosure, may make alterations and modifications by the techniques taught by the present disclosure without departing from the spirit and scope of the present disclosure.
The exemplary embodiments of the present invention and the descriptions thereof are intended to illustrate the present invention, but not to limit the present invention. In addition, the same or similar reference numerals are used for the same or similar parts in the drawings and the embodiments.
The terms "first," "second," …, and the like, as used herein, do not denote a particular order or sequence, nor are they intended to limit the invention, but rather are merely used to distinguish one element or operation from another in the same technical term.
With respect to directional terms used herein, for example: upper, lower, left, right, front or rear, etc., are merely references to the directions of the drawings. Thus, directional terminology is used for purposes of illustration and is not intended to be limiting.
As used herein, the terms "comprising," "including," "having," "containing," and the like are intended to be inclusive and mean an inclusion, but not limited to.
As used herein, "and/or" includes any or all combinations of such things.
Reference herein to "a plurality" includes "two" and "more than two"; the term "plurality of sets" as used herein includes "two sets" and "more than two sets".
The terms "about," "approximately" and the like as used herein are used to modify any quantitative or positional deviation that could vary slightly without such slight variation or positional deviation altering its nature. In general, the range of slight variations or errors modified by such terms may be 20% in some embodiments, 10% in some embodiments, 5% in some embodiments, or other values. It should be understood by those skilled in the art that the above mentioned values can be adjusted according to the actual requirements, and are not limited thereto.
Certain terms used to describe the application will be discussed below, or elsewhere in this specification, to provide additional guidance to those skilled in the art in connection with the description of the application.
Fig. 1 is a schematic structural diagram of an embodiment one of an optical storage and charging integrated system according to an embodiment of the present invention, where, as shown in fig. 1, a charging pile charges an electric vehicle or takes electricity from the electric vehicle; the direct current bus is connected with the charging pile to transmit electric energy to the electric automobile or receive electric energy from the electric automobile to transmit electric energy to other electric automobiles; the storage battery stores redundant electric energy on the direct-current bus; an AC/DC converter (AC/DC converter) transfers electrical energy on a DC bus to a utility grid (commercial grid) or transfers electrical energy on a utility grid to a DC bus.
In the embodiment shown in the drawings, the optical storage and integration system comprises: a plurality of charging piles 1, a direct current bus 2, a storage battery 3 and an AC/DC converter 4. The plurality of charging piles 1 are used for charging the electric automobile C or taking electricity from the electric automobile C; the direct current bus 2 is connected with the charging pile 1, and the direct current bus 2 is used for transmitting electric energy to the electric automobile C or receiving electric energy from the electric automobile C; the storage battery 3 is connected with the direct current bus 2, and the storage battery 3 is used for storing electric energy on the direct current bus 2 or transmitting electric energy to the direct current bus 2; the AC/DC converter 4 is connected to the utility grid P and the DC bus 2, and the AC/DC converter 4 is configured to transfer the electric energy on the DC bus 2 to the utility grid P or to transfer the electric energy on the utility grid P to the DC bus 2. In a specific embodiment of the present invention, the storage battery 3 may be a lithium battery or a lead-acid battery, etc.; the AC/DC converter 4 may be a bi-directional energy storage converter.
Referring to fig. 1, at the time of electricity consumption valley, the storage battery 3 stores electricity; and when the electricity consumption is high, the electric automobile C transmits redundant electric energy to the direct current bus 2, and the electric automobile C can be used by other electric automobiles C. The electric automobile C can be charged when the electricity price is low, electricity is sold when the electricity price is high, and the owner of the electric automobile C can earn a gap, so that the owner of the electric automobile C is prompted to charge the electric automobile C when electricity is used in a valley, the electricity is sold when electricity is used in a peak to charge the light storage and integration system, the light storage and integration system is enabled to charge other electric automobiles, and therefore the impact on a public power grid caused by the concentrated charging of the electric automobile C in the peak period of electricity is relieved, and the energy utilization rate is high.
Fig. 2 is a schematic structural diagram of a second embodiment of an integrated optical storage and charging system according to an embodiment of the present invention, as shown in fig. 2, a plurality of clean energy power generation units collect clean energy such as solar energy and wind energy, and the clean energy is transmitted to a dc bus for charging an electric car, or stored in a storage battery, or transmitted to a public power grid.
In the embodiment shown in the figure, the light storage and integration system further comprises a plurality of clean energy power generation units 5. The clean energy power generation unit 5 is connected with the direct current bus 2, and the clean energy power generation unit 5 is used for transmitting electric energy to the direct current bus 2. In a specific embodiment of the present invention, the clean energy power generation unit 5 is a solar power generation unit or a wind power generation unit.
Referring to fig. 2, the electric energy generated by the clean energy generating unit can be used by an electric automobile, can be stored in a storage battery and can be conveyed to a public power grid, so that the impact on the public power grid caused by centralized charging of the electric automobile in the electricity utilization peak period is further relieved, the electric automobile is clean and environment-friendly, and the energy utilization rate is high.
Fig. 3 is a schematic structural diagram of a third embodiment of an integrated optical storage and charging system according to an embodiment of the present invention, where an energy storage DC/DC unit (energy storage DC/DC unit) controls under what conditions to charge a storage battery, as shown in fig. 3, so as to maximize electric energy utilization.
In the embodiment shown in the figure, the optical storage and integration system further comprises an energy storage DC/DC unit 6. Wherein an energy storage DC/DC unit 6 is arranged between the battery 3 and the DC bus 2, the energy storage DC/DC unit 6 being configured to transfer the electrical energy of the battery 3 to the DC bus 2 or to transfer the electrical energy on the DC bus 2 to the battery 3.
Referring to fig. 3, the energy storage DC/DC unit 6 realizes mutual transmission of electric energy between the storage battery 3 and the direct current bus 2, stores redundant electric energy on the direct current bus 2 into the storage battery 3, and can also transmit the electric energy stored in the storage battery 3 to the direct current bus 2 for other electric vehicles.
Fig. 4 is a schematic structural diagram of an embodiment four of an optical storage and charging integrated system according to an embodiment of the present invention, and as shown in fig. 4, a control unit controls states of an AC/DC converter and an energy storage DC/DC unit according to a remaining capacity of a storage battery and a voltage of a DC bus.
In the embodiment shown in this figure, the light storage and integration system further comprises a control unit 7. Wherein a control unit 7 is connected to the AC/DC converter 4 and the energy storing DC/DC unit 6, the control unit 7 is configured to control states of the AC/DC converter 4 and the energy storing DC/DC unit 6 according to a remaining power E of the storage battery 3 and a voltage V of the DC bus 2. The book is provided with
In a specific embodiment of the invention, the states of the AC/DC converter 4 include: a disabled state (disabled state), transferring the electric energy on the dc bus 2 to the public power grid P, transferring the electric energy on the public power grid P to the dc bus 2; the states of the energy storing DC/DC unit 6 include: a disabled state (disabled state), transferring the electric energy of the battery 3 to the dc bus 2, transferring the electric energy on the dc bus 2 to the battery 3. The disabled state refers in particular to the device being in a non-operational state or an off state.
Referring to fig. 4, the control unit 7 controls the states of the AC/DC converter 4 and the energy storage DC/DC unit 6 according to the remaining power E of the battery 3 and the voltage V of the DC bus 2, and maximizes the power utilization rate on the premise that the electric vehicle C has sufficient available power.
Fig. 5 is a schematic structural diagram of a fifth embodiment of an integrated optical storage and charging system according to an embodiment of the present invention, as shown in fig. 5, an electric energy recovery unit is disposed between a charging pile and a dc bus, and surplus electric energy of an electric vehicle is recovered.
In the embodiment shown in this figure, the light storage and integration system further comprises a plurality of electric energy recovery units 8. The electric energy recovery units 8 are in one-to-one correspondence with the charging piles 1, the electric energy recovery units 8 are arranged between the charging piles 1 and the direct current buses 2, and the electric energy recovery units 8 are used for recovering redundant electric energy of the electric automobile C according to the voltage V.
Specifically, when the voltage on the dc bus 2 is lower than the set value, the redundant electric energy of the electric vehicle C is recovered, so as to reduce the impact of the concentrated charging of the electric vehicle C to the public power grid P. When the voltage on the direct current bus 2 is higher than another set value, the electric energy on the direct current bus 2 is transmitted to the public power grid P, so that sufficient electric energy is reserved for the electric automobile C to use.
For example, when the remaining power E is greater than the first preset power E1 and the voltage V is greater than the first preset voltage V1, the control unit 7 controls the AC/DC converter 4 to transfer the electric energy on the DC bus 2 to the public power grid P and switches the energy storage DC/DC unit 6 to the disabled state, and the electric energy recovery unit 8 stops recovering the surplus electric energy of the electric vehicle C. Since the residual electric quantity E in the storage battery 3 is sufficient, and the voltage of the dc bus 2 is high enough to meet the use requirement of the electric vehicle C, at this time, the electric energy on the dc bus 2 can be transmitted to the public power grid P, and the recovery of the redundant electric energy of the electric vehicle C is not required, which is usually the electricity consumption valley period.
Further, when the remaining power E is greater than the first preset power E1 and the voltage V is greater than or equal to the second preset voltage V2 and less than or equal to the first preset voltage V1, the control unit 7 switches the AC/DC converter 4 to a disabled state and switches the energy storage DC/DC unit 6 to a disabled state, and the electric energy recovery unit 8 stops recovering the excessive electric energy of the electric vehicle C, where the second preset voltage V2 is less than the first preset voltage V1. Since the remaining power E of the battery 3 is sufficient and the voltage difference of the dc bus 2 is not so large that the charging requirement of the electric vehicle C can be maintained, the dc bus 2 stops supplying electric energy to the public power grid P, the battery 3 does not need to be charged, and the surplus electric energy of the electric vehicle C does not need to be recovered, and since no boost or ac-dc change is required between the dc bus 2 and the public power grid P and between the dc bus 2 and the battery 3, the electric energy utilization rate is high.
Further, when the remaining power E is greater than the first preset power E1 and the voltage V is less than the second preset voltage V2, the control unit 7 switches the AC/DC converter 4 to a disabled state and controls the energy storage DC/DC unit 6 to transmit the electric energy of the storage battery 3 to the DC bus 2, and the electric energy recovery unit 8 stops recovering the redundant electric energy of the electric vehicle C. Since the voltage of the dc bus 2 is too low to meet the charging requirement of the electric vehicle C, the battery 3 is required to supply power to the dc bus 2.
Further, when the remaining power E is smaller than or equal to a first preset power E1 and larger than or equal to a second preset power E2, and the voltage V is larger than a first preset voltage V1, the control unit 7 controls the AC/DC converter 4 to transmit the electric energy on the DC bus 2 to the public power grid P, controls the energy storage DC/DC unit 6 to transmit the electric energy on the DC bus 2 to the storage battery 3, and the electric energy recovery unit 8 stops recovering the redundant electric energy of the electric automobile C, wherein the second preset power E2 is smaller than the first preset power E1. Since the voltage of the dc bus 2 is sufficiently high and the remaining amount E of the battery 3 decreases, the electric energy on the dc bus 2 is transmitted to the battery 3 and the public power grid P.
Further, when the remaining power E is smaller than or equal to a first preset power E1 and larger than or equal to a second preset power E2, and the voltage V is smaller than or equal to the first preset voltage V1 and larger than or equal to the second preset voltage V2, the control unit 7 switches the AC/DC converter 4 to a non-enabled state and switches the energy storage DC/DC unit 6 to a non-enabled state, and the electric energy recovery unit 8 stops recovering the redundant electric energy of the electric automobile C, wherein the second preset voltage V2 is smaller than the first preset voltage V1. The remaining power E of the battery 3 and the voltage V of the DC bus 2 can also maintain the use of the electric vehicle C, and at this time, both the AC/DC converter 4 and the energy storage DC/DC unit 6 are in an off state.
Further, when the remaining power E is smaller than or equal to the first preset power E1 and larger than or equal to the second preset power E2, and the voltage V is smaller than the second preset voltage V2, the control unit 7 switches the AC/DC converter 4 to a disabled state, controls the energy storage DC/DC unit 6 to transmit the electric energy of the storage battery 3 to the DC bus 2, and the electric energy recovery unit 8 starts to recover the redundant electric energy of the electric automobile C. Because the voltage V of the dc bus 2 is too low to meet the requirements of the electric vehicle C, the battery 3 and other electric vehicles C with sufficient energy are required to supply power to the dc bus 2.
Further, when the remaining power E is smaller than a second preset power E2 and the voltage V is greater than a first preset voltage V1, the control unit 7 switches the AC/DC converter 4 to a disabled state and controls the energy storage DC/DC unit 6 to transmit the electric energy on the DC bus 2 to the storage battery 3, and the electric energy recovery unit 8 stops recovering the redundant electric energy of the electric automobile C, where the second preset power E2 is smaller than the first preset power E1. Since the remaining power E of the battery 3 is insufficient, the dc bus 2 can maintain the normal charge of the electric vehicle C, and thus the battery 3 is charged by the dc bus 2.
Further, when the remaining power E is smaller than a second preset power E2 and the voltage V is smaller than or equal to the first preset voltage V1 and is greater than or equal to the second preset voltage V2, the control unit 7 switches the AC/DC converter 4 to a disabled state and switches the energy storage DC/DC unit 6 to a disabled state, and the electric energy recovery unit 8 stops recovering the redundant electric energy of the electric automobile C, wherein the second preset voltage V2 is smaller than the first preset voltage V1. Since the dc bus 2 can barely maintain the use of the electric vehicle C, the battery 3 is not charged although the remaining power E of the battery 3 is low.
Further, when the remaining power E is smaller than a second preset power E2 and the voltage V is smaller than the second preset voltage V2, the control unit 7 controls the AC/DC converter 4 to transfer the electric energy on the public power grid P to the direct current bus 2 and switch the energy storage DC/DC unit 6 to a non-enabled state, and the electric energy recovery unit 8 starts to recover the redundant electric energy of the electric automobile C. Because the residual electric quantity E of the storage battery 3 and the voltage V on the direct current bus are very low, the public power grid P is required to convey electric energy to the direct current bus 2, and redundant electric energy of other electric vehicles C is required to be recovered so as to meet the charging requirement of the electric vehicles C, the electric energy price is higher in most electricity consumption peak periods at the moment, the residual electric quantity E of the storage battery 3 is insufficient, the storage battery 3 cannot be charged, the cost is reduced, meanwhile, the utilization rate of the electric energy is improved due to the fact that the redundant electric energy of the electric vehicles C is received, meanwhile, benefits are brought to owners of the electric vehicles C, the owners of the electric vehicles C are promoted to sell electricity, the electricity consumption peak time period is lightened, and the pressure of the public power grid P is reduced.
The embodiment of the invention provides an optical storage and charging integrated system, which is composed of a plurality of storage batteries, a plurality of clean energy power generation units, a plurality of charging piles, a plurality of AC/DC converters and other components, wherein when the electricity consumption is low and the electric energy of the storage batteries is insufficient, the storage batteries firstly store electricity from the clean energy power generation units and then store electricity from a public power grid; when the electricity consumption is high, the electric automobile firstly takes electricity from the clean energy power generation unit, then takes electricity from the storage battery, secondly takes electricity from other electric automobiles and finally takes electricity from the public power grid, so the electric automobile can be charged at low electricity price (electricity consumption is low), the electric automobile owner can earn a gap when the electricity consumption is high, the electric automobile owner is promoted to charge the electric automobile at the electricity consumption is low, the electricity is sold at the electricity consumption is high, the light is supplied to the light to store and charge the integrated system, the light is stored and the integrated system charges other electric automobiles, and therefore the impact caused to the public power grid when the electric automobile is intensively charged at the electricity consumption peak period is relieved. The storage battery stores electric energy generated by the clean energy power generation unit (such as a wind generating set or a solar circuit board and the like) for the electric automobile to use or store in the storage battery, so that the impact on a public power grid caused by concentrated charging of the electric automobile in the electricity utilization peak period is further relieved, the energy is saved, the environment is protected, and the energy utilization rate is high.
The embodiments of the invention described above may be implemented in various hardware, software code or a combination of both. For example, embodiments of the invention may also be program code for performing the above-described methods in a data signal processor (Digital Signal Processor, DSP). The invention may also relate to various functions performed by a computer processor, digital signal processor, microprocessor, or field programmable gate array (Field Programmable Gate Array, FPGA). The processor described above may be configured in accordance with the present invention to perform specific tasks by executing machine readable software code or firmware code that defines the specific methods disclosed herein. The software code or firmware code may be developed in different programming languages and in different formats or forms. The software code may also be compiled for different target platforms. However, the different code patterns, types and languages of software code and other types of configuration code that perform tasks according to the invention do not depart from the spirit and scope of the invention.
The foregoing is merely illustrative of the embodiments of this invention and any equivalent and equivalent changes and modifications can be made by those skilled in the art without departing from the spirit and principles of this invention.
Claims (4)
1. An optical storage and retrieval integrated system, comprising:
the charging piles (1) are used for charging the electric automobile (C) or taking electricity from the electric automobile (C);
a direct current bus (2) connected with the charging pile (1) and used for transmitting electric energy to the electric automobile (C) or receiving electric energy from the electric automobile (C);
the storage battery (3) is connected with the direct current bus (2) and is used for storing electric energy on the direct current bus (2) or conveying electric energy to the direct current bus (2);
an AC/DC converter (4) connected to a public power grid (P) and to the DC bus (2) for transferring electrical energy on the DC bus (2) to the public power grid (P) or to the DC bus (2);
an energy storage DC/DC unit (6) arranged between the storage battery (3) and the direct current bus (2) and used for transmitting the electric energy of the storage battery (3) to the direct current bus (2) or transmitting the electric energy on the direct current bus (2) to the storage battery (3);
a control unit (7) connected with the AC/DC converter (4) and the energy storage DC/DC unit (6) and used for controlling the states of the AC/DC converter (4) and the energy storage DC/DC unit (6) according to the residual electric quantity E of the storage battery (3) and the voltage V of the direct current bus (2); and
a plurality of electric energy recovery units (8) which are in one-to-one correspondence with the charging piles (1) are arranged between the charging piles (1) and the direct current buses (2) and are used for recovering redundant electric energy of the electric automobile (C) according to the voltage V,
when the voltage on the direct current bus (2) is lower than a first set value, the redundant electric energy of the electric automobile (C) is recovered; when the voltage on the direct current bus (2) is higher than a second set value, the electric energy on the direct current bus (2) is transmitted to a public power grid (P),
when the residual electric quantity E is larger than a first preset electric quantity E1 and the voltage V is larger than a first preset voltage V1, the control unit (7) controls the AC/DC converter (4) to transmit the electric energy on the direct current bus (2) to the public power grid (P) and switch the energy storage DC/DC unit (6) to a non-enabled state, the electric energy recovery unit (8) stops recovering the redundant electric energy of the electric automobile (C),
when the residual electric quantity E is larger than the first preset electric quantity E1 and the voltage V is larger than or equal to a second preset voltage V2 and smaller than or equal to the first preset voltage V1, the control unit (7) switches the AC/DC converter (4) to a non-enabled state and switches the energy storage DC/DC unit (6) to a non-enabled state, the electric energy recovery unit (8) stops recovering the redundant electric energy of the electric automobile (C), wherein the second preset voltage V2 is smaller than the first preset voltage V1,
when the residual electric quantity E is larger than the first preset electric quantity E1 and the voltage V is smaller than the second preset voltage V2, the control unit (7) switches the AC/DC converter (4) to a non-enabled state and controls the energy storage DC/DC unit (6) to transmit the electric energy of the storage battery (3) to the direct current bus (2), the electric energy recovery unit (8) stops recovering the redundant electric energy of the electric automobile (C),
when the residual electric quantity E is smaller than or equal to a first preset electric quantity E1 and larger than or equal to a second preset electric quantity E2 and the voltage V is larger than a first preset voltage V1, the control unit (7) controls the AC/DC converter (4) to transmit the electric energy on the direct current bus (2) to the public power grid (P) and controls the energy storage DC/DC unit (6) to transmit the electric energy on the direct current bus (2) to the storage battery (3), the electric energy recovery unit (8) stops recovering the redundant electric energy of the electric automobile (C), wherein the second preset electric quantity E2 is smaller than the first preset electric quantity E1,
the residual electric quantity E is smaller than or equal to a first preset electric quantity E1 and larger than or equal to a second preset electric quantity E2, and when the voltage V is smaller than or equal to the first preset voltage V1 and larger than or equal to the second preset voltage V2, the control unit (7) switches the AC/DC converter (4) to a non-enabled state and switches the energy storage DC/DC unit (6) to a non-enabled state, the electric energy recovery unit (8) stops recovering the redundant electric energy of the electric automobile (C), wherein the second preset voltage V2 is smaller than the first preset voltage V1,
when the residual electric quantity E is smaller than or equal to a first preset electric quantity E1 and larger than or equal to a second preset electric quantity E2 and the voltage V is smaller than the second preset voltage V2, the control unit (7) switches the AC/DC converter (4) to a non-enabled state and controls the energy storage DC/DC unit (6) to transmit the electric energy of the storage battery (3) to the direct current bus (2), the electric energy recovery unit (8) starts to recover redundant electric energy of the electric automobile (C),
when the residual electric quantity E is smaller than a second preset electric quantity E2 and the voltage V is larger than a first preset voltage V1, the control unit (7) switches the AC/DC converter (4) to a non-enabled state and controls the energy storage DC/DC unit (6) to transmit the electric energy on the direct current bus (2) to the storage battery (3), the electric energy recovery unit (8) stops recovering the redundant electric energy of the electric automobile (C), wherein the second preset electric quantity E2 is smaller than the first preset electric quantity E1,
when the residual electric quantity E is smaller than a second preset electric quantity E2 and the voltage V is smaller than or equal to the first preset voltage V1 and larger than or equal to the second preset voltage V2, the control unit (7) switches the AC/DC converter (4) to a non-enabled state and switches the energy storage DC/DC unit (6) to a non-enabled state, the electric energy recovery unit (8) stops recovering the redundant electric energy of the electric automobile (C), wherein the second preset voltage V2 is smaller than the first preset voltage V1,
when the residual electric quantity E is smaller than a second preset electric quantity E2 and the voltage V is smaller than the second preset voltage V2, the control unit (7) controls the AC/DC converter (4) to transmit electric energy on the public power grid (P) to the direct current bus (2) and switch the energy storage DC/DC unit (6) to a non-enabled state, and the electric energy recovery unit (8) starts to recover redundant electric energy of the electric automobile (C).
2. The optical storage and retrieval integrated system of claim 1, further comprising:
and the clean energy power generation units (5) are connected with the direct current buses (2) and are used for transmitting electric energy to the direct current buses (2).
3. The light storage and integration system according to claim 2, characterized in that the clean energy power generation unit (5) is a solar power generation unit or a wind power generation unit.
4. The optical storage and integration system according to claim 1, characterized in that the AC/DC converter (4) is a bi-directional energy storage converter.
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| CN108859820A (en) * | 2018-06-19 | 2018-11-23 | 唐山市启明科技有限公司 | Energy storage type charging equipment |
| CN109435739A (en) * | 2018-09-27 | 2019-03-08 | 苏州融硅新能源科技有限公司 | New energy charging station system and its control method, electronic equipment, storage medium |
| CN111231728B (en) * | 2020-02-27 | 2021-06-25 | 国网山东省电力公司潍坊供电公司 | Photovoltaic energy storage charging and discharging integrated energy control system and method |
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