CN108695870B - Charging and energy storage integrated system - Google Patents

Charging and energy storage integrated system Download PDF

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Publication number
CN108695870B
CN108695870B CN201810354680.5A CN201810354680A CN108695870B CN 108695870 B CN108695870 B CN 108695870B CN 201810354680 A CN201810354680 A CN 201810354680A CN 108695870 B CN108695870 B CN 108695870B
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China
Prior art keywords
charging
energy storage
energy
converter
electric energy
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CN201810354680.5A
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Chinese (zh)
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CN108695870A (en
Inventor
魏志立
黄世霖
沈高松
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Contemporary Amperex Technology Co Ltd
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Contemporary Amperex Technology Co Ltd
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28Arrangements for balancing of the load in a network by storage of energy
    • H02J3/32Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/0006Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network for single frequency AC networks
    • H02J13/0013Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network for single frequency AC networks characterised by transmission structure between the control or monitoring unit and the controlled or monitored unit
    • H02J13/0017Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network for single frequency AC networks characterised by transmission structure between the control or monitoring unit and the controlled or monitored unit with direct transmission between the control or monitoring unit and the controlled or monitored unit
    • H02J13/0075Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network for single frequency AC networks characterised by transmission structure between the control or monitoring unit and the controlled or monitored unit with direct transmission between the control or monitoring unit and the controlled or monitored unit using radio means
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381Dispersed generators
    • H02J3/382Dispersed generators the generators exploiting renewable energy
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/46Controlling of the sharing of output between the generators, converters, or transformers
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/70Smart grids as climate change mitigation technology in the energy generation sector
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/7853
    • YGENERAL 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
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00Systems supporting electrical power generation, transmission or distribution
    • Y04S10/12Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation
    • YGENERAL 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
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00Systems supporting electrical power generation, transmission or distribution
    • Y04S10/14Energy storage units
    • YGENERAL 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
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20End-user application control systems
    • Y04S20/242Home appliances
    • YGENERAL 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
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S40/00Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/12Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y04S40/126Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission

Abstract

The invention provides a charging and energy storage integrated system, and relates to the field of electric power. The charging and energy storage integrated system comprises a voltage and current conversion system, an energy storage system, a charging system and a data monitoring system. The voltage-current conversion system is configured to perform current conversion or voltage conversion among the power grid, the energy storage system and the charging system; the energy storage system is configured to store electric energy transmitted by a power grid and provide the electric energy for the charging system and/or the power grid; the charging system is configured to charge the external electric equipment by using the electric energy provided by the power grid and/or the energy storage system; the data monitoring system is configured to acquire the electric energy regulation and control parameter, and regulate and control electric energy transmission among the power grid, the voltage-current conversion system, the energy storage system and the charging system according to the electric energy regulation and control parameter. By utilizing the technical scheme in the embodiment of the invention, the charging quality for charging the external electric equipment can be improved.

Description

Charging and energy storage integrated system
Technical Field
The invention relates to the field of electric power, in particular to a charging and energy storage integrated system.
Background
With the wide use of new energy in various fields, more and more electric vehicles and charging piles are put into use. The charging pile can be incorporated into a charging network system. In order to meet the charging requirements of users, a charging network system needs to be planned according to factors such as city overall planning, power grid planning, user distribution and user requirements.
At present, electric equipment such as an electric automobile can directly get electricity from a power grid in a charging network system through a charging pile. However, due to the limited load capacity of the power grid, the large amount of electric energy required by the charging pile brings huge pressure on the power grid. For example, when a large number of electric vehicles are charged in a concentrated manner within a time period, a large amount of electric energy is output from the power grid, and thus the short-time capacity of the power grid is insufficient. The power grid is subjected to excessive pressure, which can reduce the charging quality for charging the electric equipment.
Disclosure of Invention
The embodiment of the invention provides a charging and energy storage integrated system which can improve the charging quality for charging external electric equipment.
On one hand, the embodiment of the invention provides an energy storage and charging integrated system, which comprises a voltage-current conversion system, an energy storage system, a charging system and a data monitoring system; the voltage-current conversion system is connected among the power grid, the energy storage system and the charging system and is configured to perform current conversion or voltage conversion among the power grid, the energy storage system and the charging system; the energy storage system is configured to store electric energy transmitted by a power grid and provide the electric energy for the charging system and/or the power grid; the charging system is configured to charge the external electric equipment by using the electric energy provided by the power grid and/or the energy storage system; and the data monitoring system is connected with the voltage-current conversion system, the energy storage system and the charging system, is configured to acquire electric energy regulation and control parameters, and regulates and controls electric energy transmission among the power grid, the voltage-current conversion system, the energy storage system and the charging system according to the electric energy regulation and control parameters.
The embodiment of the invention provides a charging and energy storage integrated system which comprises a voltage and current conversion system, an energy storage system, a charging system and a data monitoring system. The data monitoring system can acquire the electric energy regulation and control parameters and regulate and control electric energy transmission among the power grid, the voltage-current conversion system, the energy storage system and the charging system according to the electric energy regulation and control parameters. The voltage-current conversion system can convert the electric energy into the electric energy meeting the requirements of the power grid, the energy storage system and the charging system, so that the power grid, the energy storage system and the charging system can use the transmitted electric energy. The charging system can charge the external electric equipment by using the electric energy provided by the power grid through the voltage-current conversion system, and can also charge the external electric equipment by using the electric energy provided by the energy storage system through the voltage-current conversion system. The problem of charging quality reduction caused by over-pressure on the power grid is avoided, and therefore the charging quality for charging external electric equipment is improved.
Drawings
The present invention will be better understood from the following description of specific embodiments thereof taken in conjunction with the accompanying drawings, in which like or similar reference characters designate like or similar features.
Fig. 1 is a schematic structural diagram of an integrated system for storing and charging energy according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an integrated energy charging and storing system according to another embodiment of the present invention;
fig. 3 is a schematic structural diagram of an integrated energy charging and storing system according to another embodiment of the present invention.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention. The present invention is in no way limited to any specific configuration and algorithm set forth below, but rather covers any modification, replacement or improvement of elements, components or algorithms without departing from the spirit of the invention. In the drawings and the following description, well-known structures and techniques are not shown in order to avoid unnecessarily obscuring the present invention.
The embodiment of the invention provides an energy storage and charging integrated system. The energy storage and charging integrated system is connected with a power grid, the power grid can be communicated with an energy storage system and a charging system in the energy storage and charging integrated system through a voltage-current conversion system, and the data monitoring system monitors and regulates electric energy transmitted in the power grid, the energy storage system and the charging system. Therefore, efficient utilization of electric energy transmitted in the power grid, the energy storage system and the charging system is achieved. The energy storage system can also supply power for the charging system in the process of charging the external electric equipment, so that the charging quality of the external electric equipment is improved.
Fig. 1 is a schematic structural diagram of an integrated system for storing and charging energy according to an embodiment of the present invention. In fig. 1, the straight line connection represents the electrical connection, and the arrow connection represents the communication connection. As shown in fig. 1, the integrated energy storage and charging system includes a voltage-current conversion system 11, an energy storage system 12, a charging system 13, and a data monitoring system 14.
And the voltage-current conversion system 11 is connected between the power grid, the energy storage system 12 and the charging system 13, and the voltage-current conversion system 11 is configured to perform current conversion or voltage conversion among the power grid, the energy storage system 12 and the charging system 13. The power grid, the energy storage system 12 and the charging system 13 have different requirements for electric energy. For example, the electric energy can be divided into ac and dc according to the difference between ac and dc. The electric energy can be divided into voltages in different voltage value ranges according to the voltage difference. The electric energy can be divided into currents in different current value ranges according to the difference of the current levels. Therefore, between the grid, the energy storage system 12 and the charging system 13, the voltage-current conversion system 11 is required to convert the voltage or the current into the voltage or the current meeting the requirements of the grid, the energy storage system 12 and the charging system 13.
The voltage-current conversion system 11, the energy storage system 12, the charging system 13 and the power grid are all electrically connected, so that the transmission of electric energy among the voltage-current conversion system 11, the energy storage system 12, the charging system 13 and the power grid is realized.
An energy storage system 12 configured to store electrical energy transmitted from the power grid and to provide electrical energy to the charging system 13 and/or the power grid. In one example, the energy storage system 12 may include one or more of a cell, a battery module, and a battery pack. The number of the single battery cells, the number of the battery modules and the number of the battery packs may be one or more, and the number is not limited herein. The energy storage system 12 may also include, but is not limited to, other devices capable of storing electrical energy.
When the integrated charging and energy storage system is separated from the power grid (i.e., the integrated charging and energy storage system is in an off-grid state), the energy storage system 12 in the integrated charging and energy storage system can also be used as an emergency power supply or a standby power supply to provide electric energy for the charging system 13, so that the charging system 13 can charge external electric equipment.
And the energy storage system 12 may cooperate with the grid to collectively provide electrical energy to the charging system 13. When the charging system 13 needs to supply power to a large number of external electric devices in a centralized manner, the energy storage system 12 can also supply power to the charging system 13, so that the load of a power grid is reduced, and the requirement of high-power charging is met.
And the charging system 13 is configured to charge the external electric equipment by using the electric energy provided by the power grid and/or the energy storage system 12. The electric energy used by the charging system 13 for charging the external electric equipment may be from the power grid, the energy storage system 12, or both the power grid and the energy storage system 12.
In one example, the charging system 13 may include more than one charging device. The charging equipment can charge the external electric equipment. For example, in a new energy vehicle charging scenario, the charging system 13 may include more than one charging pile, and each charging pile may charge the new energy vehicle.
And the data monitoring system 14 is connected with the voltage-current conversion system 11, the energy storage system 12 and the charging system 13, is configured to acquire an electric energy regulation parameter, and regulates and controls electric energy transmission among the power grid, the voltage-current conversion system 11, the energy storage system 12 and the charging system 13 according to the electric energy regulation parameter. The data monitoring system 14, the voltage-current conversion system 11, the energy storage system 12 and the charging system 13 may be in communication connection, so as to facilitate data and instruction transmission.
In one example, the power control parameter may include a current value, a voltage value, a power, and other parameters of each of the voltage-to-current conversion system 11, the energy storage system 12, and the charging system 13, which may indicate the quality of the power. The data monitoring system 14 can regulate and control the electric energy transmission among the power grid, the voltage-current conversion system 11, the energy storage system 12 and the charging system 13 according to the electric energy regulation and control parameters. Therefore, when the pressure of the power grid is high, the charging system 13 can charge the external power equipment by using the electric energy transmitted by the energy storage system 12 through the voltage-current conversion system 11.
In the embodiment of the present invention, the charging system 13 can not only use the power supplied by the voltage-to-current conversion system 11 through the power grid to charge the external electric device, but also use the power supplied by the energy storage system 12 through the voltage-to-current conversion system 11 to charge the external electric device. The power grid and the energy storage system 12 can cooperate to provide electric energy for the charging system 13, so that the problem of reduction of charging quality caused by over-pressure on the power grid is solved, and the charging quality of external electric equipment is improved. For example, a new energy automobile is charged in places such as communities, markets, companies, gas stations or parking lots, the charging and energy storage integrated system in the embodiment of the invention is used for regulating and controlling electric energy to charge the new energy automobile, so that the power grid pressure can be effectively relieved, and the charging quality of the new energy automobile can be improved.
The voltage-current conversion system 11, the energy storage system 12 and the charging system 13 are monitored through the data monitoring system 14, regulation and control transmission of electric energy in the voltage-current conversion system 11, the energy storage system 12 and the charging system 13 are achieved, the energy storage system 12 can also provide electric energy for a power grid through the voltage-current conversion system 11, and therefore the influence of charging of external charging equipment on the power grid is reduced.
The data monitoring system 14 can also control the active power and the reactive power of the voltage-current conversion system 11, the energy storage system 12 and the charging system 13, and realize the functions of low voltage ride through, dynamic and static power grid support and the like by controlling the voltage-current conversion system 11, the energy storage system 12 and the charging system 13.
Fig. 2 is a schematic structural diagram of an integrated energy charging and storing system according to another embodiment of the present invention. In fig. 2, the straight line connection represents the electrical connection, and the arrow connection represents the communication connection. Fig. 2 differs from fig. 1 in that the integrated charging and energy storage system may further include an electrical power generation system 15.
The power generation system 15 is connected with the voltage-current conversion system 11 and the data monitoring system 14, and the power generation system 15 is configured to generate power and provide power for one or more of the power grid, the charging system 13 and the energy storage system 12. The power generation system 15 can generate power by self and provide the power generated by the self-power generation to more than one of the power grid, the charging system 13 and the energy storage system 12. The specific power generation manner of the power generation system 15 may be a wind power generation manner, a photovoltaic power generation manner, a water power generation manner, and the like, and is not limited herein.
The power generation system 15 may cooperate with the energy storage system 12 and the power grid to provide electric energy to the charging system 13 through the voltage-to-current conversion system 11, so as to further reduce the pressure of the power grid. The power generation system 15 can also provide electric energy for the power grid through the voltage-current conversion system 11, so that the influence of the charging system 13 on the charging of the external electric equipment on the power grid is further reduced.
When the charging and energy storage integrated system is separated from the power grid (i.e. the charging and energy storage integrated system is in an off-grid state), the power generation system 15 can be used as an emergency power supply or a standby power supply to provide electric energy for the charging system 13 through the voltage-current conversion system 11.
The power generation system 15 may also be capable of providing electrical power to the energy storage system 12 such that the energy storage system 12 may store electrical power and provide electrical power to other structures.
The electric energy generated by the power generation system 15 through self power generation has multiple directions, so that the electric energy generated by the power generation system 15 through self power generation can be consumed by 100%, and the electric energy waste is avoided. The power generation system 15 is also operated in parallel with the grid and can be linked with the grid, so that the price of the electric energy generated by the power generation system 15 can be conveniently obtained.
The power control parameters may also include parameters indicative of power quality, such as current, voltage, and power of the power generation system 15. The data monitoring system 14 may also regulate and control the power transmission among the power grid, the voltage-current conversion system 11, the energy storage system 12, the charging system 13, and the power generation system 15 according to the power regulation and control parameter. The data monitoring system 14 may also realize the function of generating power by the virtual synchronous machine for monitoring the power generation system 15.
Fig. 3 is a schematic structural diagram of an integrated energy charging and storing system according to another embodiment of the present invention. In fig. 3, the straight line connection represents the electrical connection, and the arrow connection represents the communication connection. Fig. 3 differs from fig. 2 in that the integrated charging and energy storage system shown in fig. 3 may further include a dc bus 16.
The dc bus 16 connects the voltage-to-current conversion system 11 and the energy storage system 12. The energy storage system 12 may also be configured to provide electrical energy to the charging system 13 and/or the grid through the dc bus 16 and the voltage to current conversion system 11. That is, the DC bus 16 is a direct current, and the charging system 13 can take power from the DC bus 16 by using a DC conversion (i.e., a DC/DC conversion). The process that the traditional charging system 13 needs to perform countercurrent conversion firstly, convert direct current into alternating current and then perform rectification conversion and convert alternating current into direct current is avoided, and therefore energy efficiency of power supply and energy storage between the energy storage system 12 and the charging system 13 is improved.
The voltage-to-current conversion System 11 in fig. 2 may include the transformer 111, the DC converter 112 (i.e., DC/DC), the AC converter 113 (i.e., AC/AC), the AC-to-DC converter 114 (i.e., DC/AC), the distribution System 115, and the energy storage bidirectional converter 116 (PCS) in fig. 3.
The grid is connected to a distribution system 115 and an energy storage bidirectional converter 116 through a transformer 111. The power distribution system 115 is connected to the ac converter 113, the ac-dc converter 114, and the energy storage bidirectional converter 116. The energy storage bidirectional converter 116 is connected with the direct current converter 112.
In one example, the energy storage system 12 may be communicatively coupled to a dc converter 112. The energy storage system 12 may be communicatively coupled to an energy storage bidirectional converter 116.
The power generation system 15 of fig. 2 may include the wind power generation device 151 and/or the photovoltaic power generation device 152 of fig. 3. The wind turbine 151 is connected to the ac converter 113. The photovoltaic power generation device 152 is connected to the ac/dc converter 114.
The wind power plant 151 may transmit electrical energy to the energy storage system 12 via the ac converter 113, the power distribution system 115, the energy storage bidirectional converter 116 and the dc bus 16.
The wind power plant 151 may also transmit electrical energy to the grid via the ac converter 113, the distribution system 115 and the transformer 111.
The photovoltaic power generation device 152 may transmit electrical energy to the energy storage system 12 via the ac to dc converter 114, the power distribution system 115, the energy storage bidirectional converter 116, and the dc bus 16.
The photovoltaic power plant 152 may also transmit electrical energy to the grid through the ac to dc converter 114, the power distribution system 115, and the transformer 111.
In one example, the ac converter 113 may be communicatively coupled to the wind power plant 151. The ac to dc converter 114 may be communicatively coupled to the photovoltaic power generation apparatus 152.
The charging system 13 in fig. 2 may include the dc charging post 131 and/or the ac charging post 132 in fig. 3. The dc charging pile 131 is connected to the dc converter 112. The dc converter 112 can boost the dc loop voltage to accommodate charging piles with various current requirements.
The charging system 13 may include a plurality of dc charging piles 131 and may also include a plurality of ac charging piles 132. In one example, the power of charging the external electric devices through the dc charging pile 131 and the ac charging pile 132 in the charging system 13 is adjustable, so that the normal charging of various types of external electric devices in the charging and energy storage integrated system is realized.
The dc charging pile 131 can use the electric energy transmitted by the power grid through the transformer 111, the energy storage bidirectional converter 116, the dc bus 16 and the dc converter 112 to charge the external electric device.
The dc charging pile 131 may charge the external power device by using the electric energy transmitted from the energy storage system 12 through the dc bus 16 and the dc converter 112.
The dc charging pile 131 charges the external electric device with the electric energy transmitted from the wind power generation device 151 through the ac converter 113, the distribution system 115, the energy storage bidirectional converter 116, and the dc converter 112.
The dc charging pile 131 can charge the external power device by using the electric energy transmitted by the photovoltaic power generation device 152 through the ac/dc converter 114, the power distribution system 115, the energy storage bidirectional converter 116, and the dc converter 112.
The ac charging post 132 may charge the external electric device using the electric power transmitted from the power grid through the transformer 111 and the power distribution system 115.
The ac charging post 132 can utilize the electric energy transmitted from the energy storage system 12 through the dc bus 16, the energy storage bidirectional converter 116, and the power distribution system 115 to charge the external electric devices.
The ac charging pile 132 may charge the external charging device with the electric energy transmitted from the wind power generation device 151 through the ac converter 113.
The ac charging pile 132 can charge the external charging device by using the electric energy transmitted by the photovoltaic power generation device 152 through the ac/dc converter 114.
In one example, the dc converter 112 may be communicatively coupled to the dc charging post 131.
The data monitoring System 14 in fig. 2 may include a background monitoring System 141, a local monitoring System 142, and an Energy Management System 143 (EMS) in fig. 3. The background monitoring system 141, the local monitoring system 142, and the power management system 143 may be communicatively connected to each other, so as to implement data transmission among the background monitoring system 141, the local monitoring system 142, and the power management system 143. The communication connection may be a wired communication method or a wireless communication method.
The background monitoring system 141 is connected to the local monitoring system 142, and the background monitoring system 141 is configured to remotely monitor the power regulation and control parameter obtained by the local monitoring system 142, and generate a remote control instruction to control the local monitoring system 142.
In one example, the background monitoring system 141 may generate a remote control instruction to control the local monitoring system 142 according to the power regulation parameter.
In an example, the background monitoring system 141 may also receive an operation instruction sent by an operator, and generate a remote control instruction according to the operation instruction, so as to control the local monitoring system 142.
In one example, the back office monitoring system 141 may be a remote device. For example, the background monitoring system 141 is a remote web server. Alternatively, the background monitoring system 141 may exist as an Application (APP) in the mobile terminal. For example, an operator may monitor the local monitoring system 142 through an application on a cell phone.
In one example, one back-office monitoring system 141 may monitor multiple local monitoring systems 142. The plurality of local monitoring systems 142 may upload the power regulation and control parameters to the background monitoring system 141, thereby implementing data sharing.
The local monitoring system 142 is connected to the power management system 143, and the local monitoring system 142 is configured to acquire and monitor the power regulation and control parameters acquired by the power management system 143, and generate a control instruction to control the power management system 143.
In one example, the local monitoring system 142 may generate control instructions to control the power management system 143 based on the power regulation parameter.
In one example, the local monitoring system 142 may generate control instructions to control the power management system 143 according to remote control instructions sent by the background monitoring system 141.
In one example, the local monitoring system 142 may also receive an operation instruction from an operator, and generate a control instruction according to the operation instruction, so as to control the power management system 143.
The electric energy management system 143 is connected to the voltage-current conversion system 11, the energy storage system 12 and the charging system 13, and the electric energy management system 143 is configured to obtain electric energy regulation and control parameters and send the electric energy regulation and control parameters to the local monitoring system 142; and according to the control instruction, the electric energy transmission among the voltage-current conversion system 11, the energy storage system 12 and the charging system 13 is regulated and controlled.
In one example, the power management system 143 may be communicatively coupled to the energy storage system 12, the dc converter 112, the energy storage bidirectional inverter 116, the power distribution system 115, the ac charging post 132, the ac converter 113, and the ac to dc converter 114. For example, the communication connection may be performed by means of a CAN bus (i.e., a controller area network bus).
Data monitoring system 14 in FIG. 2 may also include output device 144 in FIG. 3. The output device 144 is connected to the local monitoring system 142. The output device 144 may be, but is not limited to, a display screen, a printer, a speaker, etc.
The output device 144 may display the power regulation and control parameter obtained by the local monitoring system 142 in the form of an image or sound, so that an operator may visually obtain the content monitored by the local monitoring system 142.
It should be clear that the embodiments in this specification are described in a progressive manner, and the same or similar parts in the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. The present invention is not limited to the specific structures described above and shown in the drawings. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. Those skilled in the art may make various changes, modifications and additions after comprehending the spirit of the present invention. Also, a detailed description of known techniques is omitted herein for the sake of brevity.

Claims (9)

1. A charging and energy storage integrated system is characterized by comprising a voltage-current conversion system, an energy storage system, a charging system and a data monitoring system;
the voltage-current conversion system is connected among a power grid, the energy storage system and the charging system, and is configured to perform current conversion or voltage conversion among the power grid, the energy storage system and the charging system;
the energy storage system is configured to store the electric energy transmitted by the power grid and provide the electric energy for the charging system and/or the power grid;
the charging system is configured to charge an external electric device by using the electric energy provided by the power grid and/or the energy storage system;
the data monitoring system is connected with the voltage-current conversion system, the energy storage system and the charging system, and is configured to acquire an electric energy regulation parameter and regulate and control electric energy transmission among the power grid, the voltage-current conversion system, the energy storage system and the charging system according to the electric energy regulation parameter;
the charging and energy storage integrated system further comprises a direct current bus, and the direct current bus is connected with the voltage and current conversion system and the energy storage system;
the energy storage system is further configured to provide electrical energy to the charging system and/or the grid through the direct current bus and the voltage-to-current conversion system;
the voltage and current conversion system comprises a transformer, a direct current converter, an alternating current-direct current converter, a power distribution system and an energy storage bidirectional converter;
the power grid is connected with the power distribution system and the energy storage bidirectional converter through a transformer;
the power distribution system is connected with the alternating current converter, the alternating current-direct current converter and the energy storage bidirectional converter;
the energy storage bidirectional converter is connected with the direct current converter;
the energy charging and storing integrated system further comprises:
the power generation system is connected with the voltage-current conversion system and the data monitoring system, is configured to generate power and provides electric energy for one or more of the power grid, the charging system and the energy storage system;
the power generation system comprises photovoltaic power generation equipment, and the photovoltaic power generation equipment is connected with the alternating current-direct current converter;
the charging system comprises an alternating current charging pile, and the alternating current charging pile is configured to charge the external electric equipment by using the electric energy transmitted by the photovoltaic power generation equipment through the alternating current-direct current converter;
or the power generation system comprises wind power generation equipment which is connected with the alternating current converter;
the charging system comprises an alternating current charging pile, and the alternating current charging pile is configured to charge the external electric equipment by using the electric energy transmitted by the wind power generation equipment through the alternating current converter;
the data monitoring system comprises a background monitoring system, a local monitoring system and an electric energy management system;
the background monitoring system is connected with the local monitoring system and is configured to remotely monitor the electric energy regulation and control parameters obtained by the local monitoring system and generate a remote control instruction to control the local monitoring system;
the local monitoring system is connected with the electric energy management system and is configured to acquire and monitor the electric energy regulation and control parameters acquired by the electric energy management system and generate a control instruction to control the electric energy management system;
the electric energy management system is connected with a voltage-current conversion system, the energy storage system and the charging system, and is configured to acquire the electric energy regulation and control parameter and send the electric energy regulation and control parameter to the local monitoring system; and according to the control instruction, allocating and controlling the electric energy transmission among the voltage-current conversion system, the energy storage system and the charging system.
2. The integrated charging and energy storage system of claim 1, wherein the wind power plant is configured to:
transmitting electric energy to the energy storage system through the alternating current converter, the power distribution system, the energy storage bidirectional converter and the direct current bus;
transmitting electrical energy to the electrical grid through the AC transformer, the distribution system, and the transformer.
3. The integrated energy charging and storage system of claim 1,
the photovoltaic power generation device is configured to:
transmitting electric energy to the energy storage system through the alternating current-direct current converter, the power distribution system, the energy storage bidirectional converter and the direct current bus;
and transmitting the electric energy to the power grid through the alternating current-direct current converter, the power distribution system and the transformer.
4. The integrated charging and energy storage system according to claim 1, wherein the charging system comprises a DC charging post connected to the DC converter,
the DC charging post is configured to:
charging the external electric equipment by using the electric energy transmitted by the power grid through the transformer, the energy storage bidirectional converter, the direct current bus and the direct current converter;
and charging the external electric equipment by using the electric energy transmitted by the energy storage system through the direct current bus and the direct current converter.
5. The integrated charging and energy storage system according to claim 2, wherein the charging system comprises a DC charging post connected to the DC converter,
the direct current charging pile is configured to charge the external electric equipment by using electric energy transmitted by the wind power generation equipment through the alternating current converter, the power distribution system, the energy storage bidirectional converter and the direct current converter.
6. The integrated charging and energy storage system according to claim 3, wherein the charging system comprises a DC charging post connected to the DC converter,
the direct current charging pile is configured to charge the external electric equipment by using electric energy transmitted by the photovoltaic power generation equipment through the alternating current-direct current converter, the power distribution system, the energy storage bidirectional converter and the direct current converter.
7. The integrated charging and energy storage system of claim 1, wherein the ac charging post is configured to:
charging the external electric equipment by using the electric energy transmitted by the power grid through the transformer and the power distribution system;
and charging the external electric equipment by using the electric energy transmitted by the energy storage system through the direct current bus, the energy storage bidirectional converter and the power distribution system.
8. The integrated charging and energy storage system of claim 1, wherein the data monitoring system is further configured to regulate power transmission among the voltage-to-current converter system, the energy storage system, the power generation system, and the charging system according to the power regulation parameter.
9. The integrated charging and energy storage system of claim 1, wherein the data monitoring system further comprises an output device, the output device being connected to the local monitoring system.
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