CN116001626A - Charging station control method and device - Google Patents
Charging station control method and device Download PDFInfo
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- CN116001626A CN116001626A CN202211635273.4A CN202211635273A CN116001626A CN 116001626 A CN116001626 A CN 116001626A CN 202211635273 A CN202211635273 A CN 202211635273A CN 116001626 A CN116001626 A CN 116001626A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/12—Electric charging stations
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Abstract
The invention provides a control method and device of a charging station. The charging station comprises an energy storage device, a charging bus and a plurality of charging terminals, wherein the charging bus is connected with the energy storage device, the plurality of charging terminals and a power grid, and the control method comprises the following steps: acquiring real-time data of a charging bus; the real-time data comprises real-time voltage, real-time frequency and real-time current; decomposing the real-time current to obtain a direct axis component and a quadrature axis component of the real-time current; determining a direct component and an quadrature component of an output current of the energy storage device based on the real-time voltage, the real-time frequency, and the direct component and the quadrature component of the real-time current; based on the direct axis component and the quadrature axis component of the output current of the energy storage device, the energy storage device is adjusted, and active adjustment and reactive adjustment of the charging station are achieved. The invention can improve the electric energy quality of the charging station and reduce the power supply pressure of the power distribution network.
Description
Technical Field
The invention relates to the technical field of power supply and distribution, in particular to a control method and device of a charging station.
Background
With the development of electric vehicles, the number of electric vehicles is rapidly increased, and the charging station is used as an energy supply station of the electric vehicles, so that the power demand is also increased. When more large-capacity electric vehicles are arranged in the charging station to carry out high-power rapid charging, the influence on the electric energy quality of the charging station and the distribution network is large.
For example, when many large-capacity electric vehicles charge simultaneously, the demand for instantaneous electric quantity is great, and the distribution network can not provide enough electric quantity instantaneously, resulting in the reduction of power supply frequency and power supply voltage of the charging station, the occurrence of great deviation, and the reduction of power quality. When a plurality of large-capacity electric vehicles are charged for a period of time, the electric quantity demand is instantaneously reduced, a large deviation exists between the supplied electric quantity of the distribution network and the charging demand electric quantity of the charging station, and the phenomena of power supply frequency and power supply voltage rise of the charging station possibly occur, so that the electric energy quality is reduced.
Disclosure of Invention
The invention provides a control method and device for a charging station, which can improve the electric energy quality of the charging station and reduce the power supply pressure of a power distribution network.
In a first aspect, the present invention provides a control method of a charging station, the charging station including an energy storage device, a charging bus and a plurality of charging terminals, the charging bus being connected to the energy storage device, the plurality of charging terminals, and a power grid, the control method comprising: acquiring real-time data of a charging bus; the real-time data comprises real-time voltage, real-time frequency and real-time current; decomposing the real-time current to obtain a direct axis component and a quadrature axis component of the real-time current; determining a direct component and an quadrature component of an output current of the energy storage device based on the real-time voltage, the real-time frequency, and the direct component and the quadrature component of the real-time current; based on the direct axis component and the quadrature axis component of the output current of the energy storage device, the energy storage device is adjusted, and active adjustment and reactive adjustment of the charging station are achieved.
In one possible implementation, decomposing the real-time current to obtain a direct axis component and a quadrature axis component of the real-time current includes: determining a phase difference between the real-time voltage and the real-time current; based on the amplitude and phase difference of the real-time current, the direct and quadrature components of the real-time current are determined.
In one possible implementation, determining the direct and quadrature components of the output current of the energy storage device based on the real-time voltage, the real-time frequency, and the direct and quadrature components of the real-time current comprises: determining a direct component of an output current of the energy storage device based on the real-time frequency, the reference frequency, and the direct component of the real-time current; the quadrature component of the output current of the energy storage device is determined based on the real-time voltage, the reference voltage, and the quadrature component of the real-time current.
In one possible implementation, determining the direct component of the output current of the energy storage device based on the real-time frequency, the reference frequency, and the direct component of the real-time current includes: determining a frequency deviation based on the real-time frequency and the reference frequency; determining an active power bias based on the frequency bias; based on the active power deviation and the real-time voltage, a direct-axis component of the output current of the energy storage device is determined.
In one possible implementation, determining the quadrature component of the output current of the energy storage device based on the real-time voltage, the reference voltage, and the quadrature component of the real-time current comprises: determining a voltage deviation based on the real-time voltage and the reference voltage; determining a reactive power deviation based on the voltage deviation; based on the reactive power deviation and the real-time voltage, the quadrature component of the output current of the energy storage device is determined.
In one possible implementation, determining the direct and quadrature components of the output current of the energy storage device based on the real-time voltage, the real-time frequency, and the direct and quadrature components of the real-time current comprises: determining a frequency deviation based on the real-time frequency and the reference frequency; determining a target active power based on the frequency deviation and the real-time active power; determining a voltage deviation based on the real-time voltage and the reference voltage; determining a target reactive power based on the voltage deviation and the real-time reactive power; determining a direct component and an quadrature component of a target output current of the charging station based on the target active power and the target reactive power; the direct and quadrature components of the output current of the energy storage device are determined based on the direct and quadrature components of the target output current of the charging station and the direct and quadrature components of the real-time current of the charging station.
In one possible implementation, adjusting the energy storage device based on a direct axis component and an quadrature axis component of an output current of the energy storage device, enables active and reactive adjustment of the charging station, comprising: determining the duty ratio of a switching tube in a converter of the energy storage device based on the direct axis component; determining the phase of the duty cycle of a switching tube in a converter of the energy storage device based on the quadrature component; and controlling a converter of the energy storage device based on the magnitude and the phase of the duty ratio, and adjusting the energy storage device.
In a second aspect, an embodiment of the present invention provides a control device of a charging station, where the charging station includes an energy storage device, a charging bus, a control device and a plurality of charging terminals, the charging bus is connected to the energy storage device, the control device, the plurality of charging terminals, and a power grid, and the control device includes: the communication module is used for acquiring real-time data of the charging bus; the real-time data comprises real-time voltage, real-time frequency and real-time current; the processing module is used for decomposing the real-time current to obtain a direct axis component and a quadrature axis component of the real-time current; determining a direct component and an quadrature component of an output current of the energy storage device based on the real-time voltage, the real-time frequency, and the direct component and the quadrature component of the real-time current; based on the direct axis component and the quadrature axis component of the output current of the energy storage device, the energy storage device is adjusted, and active adjustment and reactive adjustment of the charging station are achieved.
In one possible implementation, the processing module is specifically configured to determine a phase difference between the real-time voltage and the real-time current; based on the amplitude and phase difference of the real-time current, the direct and quadrature components of the real-time current are determined.
In one possible implementation, the processing module is specifically configured to determine a direct component of the output current of the energy storage device based on the real-time frequency, the reference frequency, and the direct component of the real-time current; the quadrature component of the output current of the energy storage device is determined based on the real-time voltage, the reference voltage, and the quadrature component of the real-time current.
In one possible implementation, the processing module is specifically configured to determine a frequency deviation based on the real-time frequency and the reference frequency; determining an active power bias based on the frequency bias; based on the active power deviation and the real-time voltage, a direct-axis component of the output current of the energy storage device is determined.
In one possible implementation, the processing module is specifically configured to determine a voltage deviation based on the real-time voltage and the reference voltage; determining a reactive power deviation based on the voltage deviation; based on the reactive power deviation and the real-time voltage, the quadrature component of the output current of the energy storage device is determined.
In one possible implementation, the processing module is specifically configured to determine a frequency deviation based on the real-time frequency and the reference frequency; determining a target active power based on the frequency deviation and the real-time active power; determining a voltage deviation based on the real-time voltage and the reference voltage; determining a target reactive power based on the voltage deviation and the real-time reactive power; determining a direct component and an quadrature component of a target output current of the charging station based on the target active power and the target reactive power; the direct and quadrature components of the output current of the energy storage device are determined based on the direct and quadrature components of the target output current of the charging station and the direct and quadrature components of the real-time current of the charging station.
In one possible implementation manner, the processing module is specifically configured to determine a duty cycle of a switching tube in a converter of the energy storage device based on the direct axis component; determining the phase of the duty cycle of a switching tube in a converter of the energy storage device based on the quadrature component; and controlling a converter of the energy storage device based on the magnitude and the phase of the duty ratio, and adjusting the energy storage device.
In a third aspect, an embodiment of the present invention provides an electronic device, the electronic device comprising a memory storing a computer program and a processor for invoking and running the computer program stored in the memory to perform the steps of the method according to the first aspect and any possible implementation manner of the first aspect.
In a fourth aspect, embodiments of the present invention provide a computer readable storage medium storing a computer program, characterized in that the computer program when executed by a processor implements the steps of the method according to the first aspect and any one of the possible implementations of the first aspect.
According to the control method and device for the charging station, on one hand, the energy storage device is arranged on the charging station, so that the power supply peak supplies energy, the power supply is low Gu Chuneng, the tide fluctuation of the power distribution network is reduced, and the power supply pressure of the power distribution network is reduced. On the other hand, the invention respectively controls the direct axis component and the quadrature axis component by decomposing the real-time current into the direct axis component and the quadrature axis component and calculating to obtain the direct axis component and the quadrature axis component of the output current of the energy storage device. Because the direct current component corresponds to active power and the quadrature axis component corresponds to reactive power, the direct current component and the quadrature axis component are respectively controlled, so that the active regulation and the reactive regulation of the charging station can be realized, and the electric energy quality of the charging station is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a charging station according to an embodiment of the present invention;
fig. 2 is a flow chart of a control method of a charging station according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a control device of a charging station according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
In the description of the present invention, "/" means "or" unless otherwise indicated, for example, A/B may mean A or B. "and/or" herein is merely an association relationship describing an association object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. Further, "at least one", "a plurality" means two or more. The terms "first," "second," and the like do not limit the number and order of execution, and the terms "first," "second," and the like do not necessarily differ.
In the embodiments of the present application, words such as "exemplary" or "such as" are used to mean serving as examples, illustrations, or descriptions. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion that may be readily understood.
Furthermore, references to the terms "comprising" and "having" and any variations thereof in the description of the present application are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or modules is not limited to only those steps or modules but may, alternatively, include other steps or modules not listed or inherent to such process, method, article, or apparatus.
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the following description will be made with reference to the accompanying drawings of the present invention by way of specific embodiments.
Fig. 1 is a schematic diagram of a charging station according to an embodiment of the present invention. The charging station comprises an energy storage device, a charging bus and a plurality of charging terminals, wherein the charging bus is connected with the energy storage device, the plurality of charging terminals and a power grid.
In some embodiments, the energy storage device includes an energy storage switch, an energy storage converter, a battery pack, and a BMS battery management system. The first end of the energy storage converter is connected with the charging bus through the energy storage switch. The second end of the energy storage converter is connected with the battery pack. After the energy storage switch is closed, the control device changes the charge and discharge state and charge and discharge power of the energy storage device by changing the duty ratio and the phase of a switching tube in the energy storage converter, so that the energy storage and energy supply of the energy storage device are realized.
In some embodiments, the first end of the charging terminal is connected to the charging bus through a charging switch. And the second end of the charging terminal is connected with the electric automobile. The control device charges the electric automobile by controlling the charging terminal.
In some embodiments, the charging station is connected to an upper grid. The upper grid supplies power to the charging station and to the conventional loads in the vicinity of the charging station. And the regulation and control system performs communication interaction with the transformer, the conventional load and the charging station to finish the regulation and control of the power grid.
Fig. 2 is a flow chart of a control method of a charging station according to an embodiment of the present invention. The control method includes steps S101 to S104.
S101, acquiring real-time data of a charging bus.
In the embodiment of the application, the real-time data includes real-time voltage, real-time frequency and real-time current.
The real-time voltage of the charging bus may be 220V or 380V, for example. The real-time frequency may be 50Hz.
S102, decomposing the real-time current to obtain a direct axis component and a quadrature axis component of the real-time current.
As one possible implementation, the control device may determine a phase difference of the real-time voltage and the real-time current; based on the amplitude and phase difference of the real-time current, the direct and quadrature components of the real-time current are determined.
It should be noted that the direct axis component of the real-time current characterizes the magnitude of the active power of the charging station. The quadrature component of the real-time current characterizes the magnitude of the reactive power of the charging station.
S103, determining the direct axis component and the quadrature axis component of the output current of the energy storage device based on the real-time voltage, the real-time frequency and the direct axis component and the quadrature axis component of the real-time current.
As a possible implementation, the control device may determine the direct axis component and the quadrature axis component of the output current of the energy storage device via steps A1-A2, respectively.
A1, determining the direct-axis component of the output current of the energy storage device based on the real-time frequency, the reference frequency and the direct-axis component of the real-time current.
The control device may, for example, determine the direct component of the output current of the energy storage device via steps a11-a 13.
A11, determining the frequency deviation based on the real-time frequency and the reference frequency.
A12, determining the active power deviation based on the frequency deviation.
A13, determining a direct-axis component of the output current of the energy storage device based on the active power deviation and the real-time voltage.
A2, determining the quadrature component of the output current of the energy storage device based on the real-time voltage, the reference voltage and the quadrature component of the real-time current.
The control device may, for example, determine the quadrature component of the output current of the energy storage device via steps a21-a 23.
A21, determining the voltage deviation based on the real-time voltage and the reference voltage.
A22, determining reactive power deviation based on the voltage deviation.
A23, determining the quadrature component of the output current of the energy storage device based on the reactive power deviation and the real-time voltage.
As another possible implementation, the control device may determine the direct and quadrature components of the output current of the energy storage device through steps B1-B2.
B1, determining the frequency deviation based on the real-time frequency and the reference frequency.
B2, determining target active power based on the frequency deviation and real-time active power.
B3, determining voltage deviation based on the real-time voltage and the reference voltage.
And B4, determining target reactive power based on the voltage deviation and the real-time reactive power.
And B5, determining a direct axis component and a quadrature axis component of the target output current of the charging station based on the target active power and the target reactive power.
B6, determining the direct axis component and the quadrature axis component of the output current of the energy storage device based on the direct axis component and the quadrature axis component of the target output current of the charging station and the direct axis component and the quadrature axis component of the real-time current of the charging station.
S104, adjusting the energy storage device based on the direct axis component and the quadrature axis component of the output current of the energy storage device, and realizing active adjustment and reactive adjustment of the charging station.
As a possible implementation, the control device may adjust the energy storage device based on steps S1041-S1043.
S1041, determining the duty ratio of a switching tube in a converter of the energy storage device based on the direct axis component.
S1042, determining the phase of the duty ratio of a switching tube in a converter of the energy storage device based on the quadrature axis component.
S1043, controlling a converter of the energy storage device based on the size and the phase of the duty ratio, and adjusting the energy storage device.
According to the control method and device for the charging station, on one hand, the energy storage device is arranged on the charging station, so that the power supply peak supplies energy, the power supply is low Gu Chuneng, the tide fluctuation of the power distribution network is reduced, and the power supply pressure of the power distribution network is reduced. On the other hand, the invention respectively controls the direct axis component and the quadrature axis component by decomposing the real-time current into the direct axis component and the quadrature axis component and calculating to obtain the direct axis component and the quadrature axis component of the output current of the energy storage device. Because the direct current component corresponds to active power and the quadrature axis component corresponds to reactive power, the direct current component and the quadrature axis component are respectively controlled, so that the active regulation and the reactive regulation of the charging station can be realized, and the electric energy quality of the charging station is improved.
Compared with a single power supply scheme that a power grid supplies power to a charging station, the energy storage device is added to the charging station, and the energy storage device and an upper power grid supply power to the charging station together, so that the charging station is changed into a multi-power supply system, the tide fluctuation of a power distribution network is reduced, and the power supply pressure of the power distribution network is reduced.
The invention adopts the PQ decoupling method to carry out decoupling control, respectively and independently controls the direct axis component and the quadrature axis component, and respectively forms two independent control paths for active power and reactive power. The energy storage system has active regulation capability and voltage regulation capability, so that independent control of the output and voltage of the charging station is realized. The energy storage system has the reactive current supporting characteristic, and can automatically adjust reactive current to reduce voltage deviation and improve the electric energy quality of the charging station in an overvoltage or undervoltage state.
It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic, and should not limit the implementation process of the embodiment of the present invention.
The following are device embodiments of the invention, for details not described in detail therein, reference may be made to the corresponding method embodiments described above.
Fig. 3 is a schematic structural diagram of a control device of a charging station according to an embodiment of the present invention. The control device 200 comprises a communication module 201 and a processing module 202.
The communication module 201 is used for acquiring real-time data of the charging bus; the real-time data includes real-time voltage, real-time frequency and real-time current.
The processing module 202 is configured to decompose the real-time current to obtain a direct axis component and a quadrature axis component of the real-time current; determining a direct component and an quadrature component of an output current of the energy storage device based on the real-time voltage, the real-time frequency, and the direct component and the quadrature component of the real-time current; based on the direct axis component and the quadrature axis component of the output current of the energy storage device, the energy storage device is adjusted, and active adjustment and reactive adjustment of the charging station are achieved.
In one possible implementation, the processing module 202 is specifically configured to determine a phase difference between the real-time voltage and the real-time current; based on the amplitude and phase difference of the real-time current, the direct and quadrature components of the real-time current are determined.
In one possible implementation, the processing module 202 is specifically configured to determine a direct component of the output current of the energy storage device based on the real-time frequency, the reference frequency, and the direct component of the real-time current; the quadrature component of the output current of the energy storage device is determined based on the real-time voltage, the reference voltage, and the quadrature component of the real-time current.
In one possible implementation, the processing module 202 is specifically configured to determine a frequency deviation based on the real-time frequency and the reference frequency; determining an active power bias based on the frequency bias; based on the active power deviation and the real-time voltage, a direct-axis component of the output current of the energy storage device is determined.
In one possible implementation, the processing module 202 is specifically configured to determine a voltage deviation based on the real-time voltage and the reference voltage; determining a reactive power deviation based on the voltage deviation; based on the reactive power deviation and the real-time voltage, the quadrature component of the output current of the energy storage device is determined.
In one possible implementation, the processing module 202 is specifically configured to determine a frequency deviation based on the real-time frequency and the reference frequency; determining a target active power based on the frequency deviation and the real-time active power; determining a voltage deviation based on the real-time voltage and the reference voltage; determining a target reactive power based on the voltage deviation and the real-time reactive power; determining a direct component and an quadrature component of a target output current of the charging station based on the target active power and the target reactive power; the direct and quadrature components of the output current of the energy storage device are determined based on the direct and quadrature components of the target output current of the charging station and the direct and quadrature components of the real-time current of the charging station.
In one possible implementation, the processing module 202 is specifically configured to determine, based on the direct axis component, a magnitude of a duty cycle of a switching tube in a converter of the energy storage device; determining the phase of the duty cycle of a switching tube in a converter of the energy storage device based on the quadrature component; and controlling a converter of the energy storage device based on the magnitude and the phase of the duty ratio, and adjusting the energy storage device.
Fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present invention. As shown in fig. 4, the electronic apparatus 300 of this embodiment includes: a processor 301, a memory 302 and a computer program 303 stored in said memory 302 and executable on said processor 301. The steps of the method embodiments described above, such as steps 101 to 104 shown in fig. 2, are implemented when the processor 301 executes the computer program 303. Alternatively, the processor 301 may implement the functions of the modules/units in the above-described embodiments of the apparatus when executing the computer program 303, for example, the functions of the communication module 201 and the processing module 202 shown in fig. 3.
Illustratively, the computer program 303 may be partitioned into one or more modules/units that are stored in the memory 302 and executed by the processor 301 to accomplish the present invention. The one or more modules/units may be a series of computer program instruction segments capable of performing the specified functions, which instruction segments are used for describing the execution of the computer program 303 in the electronic device 300. For example, the computer program 303 may be divided into the communication module 201 and the processing module 202 shown in fig. 3.
The processor 301 may be a central processing unit (Central Processing Unit, CPU), but may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), field programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 302 may be an internal storage unit of the electronic device 300, such as a hard disk or a memory of the electronic device 300. The memory 302 may also be an external storage device of the electronic device 300, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card) or the like, which are provided on the electronic device 300. Further, the memory 302 may also include both internal storage units and external storage devices of the electronic device 300. The memory 302 is used for storing the computer program as well as other programs and data required by the terminal. The memory 302 may also be used to temporarily store data that has been output or is to be output.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions. The functional units and modules in the embodiment may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit, where the integrated units may be implemented in a form of hardware or a form of a software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working process of the units and modules in the above system may refer to the corresponding process in the foregoing method embodiment, which is not described herein again.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/terminal and method may be implemented in other manners. For example, the apparatus/terminal embodiments described above are merely illustrative, e.g., the division of the modules or units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection via interfaces, devices or units, which may be in electrical, mechanical or other forms.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated modules/units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the present invention may implement all or part of the flow of the method of the above embodiment, or may be implemented by a computer program to instruct related hardware, where the computer program may be stored in a computer readable storage medium, and when the computer program is executed by a processor, the computer program may implement the steps of each of the method embodiments described above. Wherein the computer program comprises computer program code which may be in source code form, object code form, executable file or some intermediate form etc. The computer readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), an electrical carrier signal, a telecommunications signal, a software distribution medium, and so forth.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention.
Claims (10)
1. A control method of a charging station, wherein the charging station includes an energy storage device, a charging bus, and a plurality of charging terminals, the charging bus is connected with the energy storage device, the plurality of charging terminals, and a power grid, the control method comprising:
acquiring real-time data of the charging bus; the real-time data comprises real-time voltage, real-time frequency and real-time current;
decomposing the real-time current to obtain a direct axis component and a quadrature axis component of the real-time current;
determining a direct component and an quadrature component of an output current of the energy storage device based on the real-time voltage, the real-time frequency, and the direct and quadrature components of the real-time current;
and adjusting the energy storage device based on the direct axis component and the quadrature axis component of the output current of the energy storage device, so as to realize active adjustment and reactive adjustment of the charging station.
2. The method of claim 1, wherein the decomposing the real-time current to obtain the direct-axis component and the quadrature-axis component of the real-time current comprises:
determining a phase difference of the real-time voltage and the real-time current;
based on the magnitude of the real-time current and the phase difference, a direct axis component and a quadrature axis component of the real-time current are determined.
3. The method of controlling a charging station according to claim 1, wherein the determining the direct-axis component and the quadrature-axis component of the output current of the energy storage device based on the real-time voltage, the real-time frequency, and the direct-axis component and the quadrature-axis component of the real-time current comprises:
determining a direct-axis component of an output current of the energy storage device based on the real-time frequency, a reference frequency, and the direct-axis component of the real-time current;
and determining the quadrature component of the output current of the energy storage device based on the real-time voltage, the reference voltage and the quadrature component of the real-time current.
4. A control method of a charging station according to claim 3, wherein the determining a direct-axis component of the output current of the energy storage device based on the real-time frequency, the reference frequency, and the direct-axis component of the real-time current comprises:
determining a frequency deviation based on the real-time frequency and a reference frequency;
determining an active power deviation based on the frequency deviation;
based on the active power deviation and the real-time voltage, a direct-axis component of an output current of the energy storage device is determined.
5. The control method of the charging station according to claim 3, wherein the determining the quadrature component of the output current of the energy storage device based on the real-time voltage, the reference voltage, and the quadrature component of the real-time current comprises:
determining a voltage deviation based on the real-time voltage and a reference voltage;
determining a reactive power deviation based on the voltage deviation;
and determining the quadrature axis component of the output current of the energy storage device based on the reactive power deviation and the real-time voltage.
6. The method of controlling a charging station according to claim 1, wherein the determining the direct-axis component and the quadrature-axis component of the output current of the energy storage device based on the real-time voltage, the real-time frequency, and the direct-axis component and the quadrature-axis component of the real-time current comprises:
determining a frequency deviation based on the real-time frequency and a reference frequency;
determining a target active power based on the frequency deviation and the real-time active power;
determining a voltage deviation based on the real-time voltage and a reference voltage;
determining a target reactive power based on the voltage deviation and the real-time reactive power;
determining a direct axis component and an quadrature axis component of a target output current of the charging station based on the target active power and the target reactive power;
the direct and quadrature components of the output current of the energy storage device are determined based on the direct and quadrature components of the target output current of the charging station and the direct and quadrature components of the real-time current of the charging station.
7. The method of claim 1, wherein the adjusting the energy storage device based on the direct axis component and the quadrature axis component of the output current of the energy storage device, to achieve active and reactive adjustment of the charging station, comprises:
determining the duty ratio of a switching tube in a converter of the energy storage device based on the direct axis component;
determining the phase of the duty cycle of a switching tube in a converter of the energy storage device based on the quadrature component;
and controlling a converter of the energy storage device based on the magnitude and the phase of the duty ratio, and adjusting the energy storage device.
8. A control device of a charging station, wherein the charging station includes an energy storage device, a charging bus, a control device and a plurality of charging terminals, the charging bus with the energy storage device, the control device, the plurality of charging terminals, and a power grid connection, the control device includes:
the communication module is used for acquiring real-time data of the charging bus; the real-time data comprises real-time voltage, real-time frequency and real-time current;
the processing module is used for decomposing the real-time current to obtain a direct axis component and a quadrature axis component of the real-time current; determining a direct component and an quadrature component of an output current of the energy storage device based on the real-time voltage, the real-time frequency, and the direct and quadrature components of the real-time current; and adjusting the energy storage device based on the direct axis component and the quadrature axis component of the output current of the energy storage device, so as to realize active adjustment and reactive adjustment of the charging station.
9. An electronic device comprising a memory storing a computer program and a processor for invoking and running the computer program stored in the memory to perform the method of any of claims 1 to 7.
10. A computer readable storage medium storing a computer program, characterized in that the computer program when executed by a processor implements the steps of the method according to any of the preceding claims 1 to 7.
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