CN207994635U - Load control unit and AC charging system - Google Patents

Load control unit and AC charging system Download PDF

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Publication number
CN207994635U
CN207994635U CN201820161069.6U CN201820161069U CN207994635U CN 207994635 U CN207994635 U CN 207994635U CN 201820161069 U CN201820161069 U CN 201820161069U CN 207994635 U CN207994635 U CN 207994635U
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China
Prior art keywords
phase
charging pile
power
load
charging
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CN201820161069.6U
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Chinese (zh)
Inventor
何照安
董振龙
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Xi'an teride lingchong New Energy Technology Co., Ltd
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Xian Tgood Intelligent Charging Technology Co Ltd
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    • 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
    • Y02E40/50Arrangements for eliminating or reducing asymmetry in polyphase networks
    • 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
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10Technologies relating to charging of electric vehicles
    • Y02T90/16Information or communication technologies improving the operation of electric vehicles

Abstract

The utility model is related to a kind of load control unit and AC charging system, which includes:Communication module for the three-phase load information for obtaining total transformer in real time from backstage distributing monitoring system;Switching switch, moreover, three input terminals of the switching switch are separately connected three-phase power line, the power input of the output end connection single phase ac charging pile of the switching switch;Connect the communication module and switching switch, and for determining minimum load phase, and the control module by controlling the supply line that the switching switch makes the power input of the single phase ac charging pile access the minimum load phase according to the three-phase load information.Implement the technical solution of the utility model, make business or residential property under the premise of not increasing additional high-power reactive-load compensation equipment, realize the three-phase equilibrium of power grid, improves power grid quality.

Description

Load control unit and AC charging system
Technical field
The utility model is related to automobile charging field more particularly to a kind of load control unit and AC charging systems.
Background technology
The universal of electric vehicle has become a kind of trend, and be electric vehicle charging charging station include independent charging station And the charging station being arranged in residential area.For the charging station being arranged in residential area, each alternating-current charging pile generally connects What is entered is single-phase alternating current, since the stochastic behaviour of electric vehicle charging load brings many do not know to distribution network operation Property, for example, the tri-phase unbalance factor of power grid can be increased.Furthermore, it is contemplated that at present since business and residential quarters early stage are not planned Electrically-charging equipment, and in order to coordinate the development of electric vehicle, later stage that can generally increase the smaller AC charging of power and volume Stake carrys out meet demand, can be further exacerbated by the tri-phase unbalance factor of power grid.
Utility model content
To solve the problems, such as that the tri-phase unbalance factor of the above-mentioned increase power grid in the presence of the prior art, the utility model carry For a kind of load control unit and AC charging system, the three-phase equilibrium of power grid can be realized, improve power grid quality.
Technical solution adopted by the utility model to solve its technical problems is:A kind of load control unit is constructed, it is built-in Or it is external in single phase ac charging pile, including:
Communication module for the three-phase load information for obtaining total transformer in real time from backstage distributing monitoring system;
Switching switch, moreover, three input terminals of the switching switch are separately connected three-phase power line, the switching is opened The power input of the output end connection single phase ac charging pile of pass;
The communication module and switching switch are connected, and for determining minimum load according to the three-phase load information Phase, and so that the power input of the single phase ac charging pile is accessed the minimum load phase by controlling the switching switch The control module of supply line.
Preferably, the control module is big in the current maximum available power of the accessed single phase ac charging pile In preset value, and when the single phase ac charging pile and electric vehicle establish CP handshake, use the minimum load phase Supply line be the electric vehicle charge.
Preferably, further include:
For generating pwm signal according to identified final duty ratio, and institute is transmitted to the electric vehicle by CP lines The CP generation modules of pwm signal are stated,
Wherein, the final duty ratio is that control module establishes CP with electric vehicle in the single phase ac charging pile and shakes hands When signal, according to the current maximum available power of the demand power of the electric vehicle and the single phase ac charging pile, specified Determined by power.
The utility model also constructs a kind of AC charging system, including total transformer, further includes:
Backstage distributing monitoring system for the three-phase load information for obtaining total transformer in real time;And
Multiple single phase ac charging piles, and the single phase ac charging pile and the backstage distributing monitoring system communication link It connects;
Above-described load control unit, and the load control unit is built-in or is external in the single phase ac charging Stake.
Implement the technical solution of the utility model, the load control unit of the utility model can be according to backstage distribution monitor system The input of single phase ac charging pile, is connected to a phase line of load minimum by the three-phase power load data that system obtains in real time Road makes business or residential property under the premise of not increasing additional high-power reactive-load compensation equipment, realizes the three-phase equilibrium of power grid, Improve power grid quality.
In addition, the load control unit of the utility model also realizes charging by changing the duty ratio of CP signal PWM waves The adjusting of power, to solve the problems, such as that the limited built cell of power capacity can not carry out electric load scheduling and more product in real time The old charging pile of board can not be unified to carry out the problem of power is adjusted in real time the case where not powering off.Improve built cell load tune The flexibility of degree and the utilization rate of charging pile.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor Under, other drawings may also be obtained based on these drawings.
Fig. 1 is the circuit diagram of the utility model business or cell AC charging system;
Fig. 2 is a kind of structural schematic diagram of the first embodiment of AC charging system provided by the utility model;
Fig. 3 is the structural schematic diagram of the first embodiment of load control unit in Fig. 2;
Fig. 4 is a kind of structural schematic diagram of the second embodiment of AC charging system provided by the utility model;
Fig. 5 is the structural schematic diagram of the first embodiment of load control unit in Fig. 4;
Fig. 6 is a kind of flow diagram of the first embodiment of AC charging control method provided by the utility model.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work The every other embodiment obtained, shall fall within the protection scope of the present invention.
Fig. 1 is the circuit diagram of the utility model business or cell AC charging system, in the AC charging system, Backstage distributing monitoring system 20 accesses the supply line of total transformer, and the three-phase load letter for obtaining total transformer in real time Breath.Multiple single phase ac charging piles 11,12 ..., 1N the power supply of total transformer is accessed by respective load control unit respectively Circuit, moreover, each single phase ac charging pile 11,12 ..., 1N connected by communication line and backstage distributing monitoring system 20 It connects, can also carry out wireless communication connection certainly.It should be noted that in other embodiments, load control unit can be also built in In single phase ac charging pile.
Fig. 2 is a kind of structural schematic diagram of the first embodiment of AC charging system provided by the utility model, the implementation The AC charging system of example includes single phase ac charging pile and is external in the load control unit 102 of the single phase ac charging pile, And the single phase ac charging pile includes charging gun (not shown), master control borad 101.In addition, load control unit 102 accesses total transformation A, B, C three-phase power line and zero curve N of device.After single phase ac charging pile activation (such as user's triggering), spatial load forecasting Device 102 obtains three-phase load information in real time from backstage distributing monitoring system 20, and switches to the phase line of load minimum to power.
Further, in the single phase ac charging pile of the embodiment, CP signals as single phase ac charging pile with it is electronic The charging connection bridge of automobile, the level magnitude of CP signals is ready come the connection of feeding back charging gun, fills by changing for electric vehicle Establish the states such as beginning, charging termination by cable, load control unit 102 adjusts electricity by changing the final duty ratio of CP signal PWM waves The charge power of electrical automobile, to realize electric load scheduling in the case where single phase ac charging pile is not stopped.
To sum up, the single phase ac charging pile of the utility model is with three-phase power line selection, power dispatching function Charging pile, in addition, the single phase ac charging pile further includes having metering module, display module etc..
Fig. 3 is the structural schematic diagram of the first embodiment of load control unit in Fig. 2, the load control unit of the embodiment Include:Control module 1021, communication module 1022, switching switch 1023.Wherein, communication module 1022 is used for from rear station power distribution Monitoring system obtains the three-phase load information of total transformer in real time, which is, for example, serial communication modular, is led to Serial mode is crossed by the real time load data transmission of every phase distribution to control module 1021.Switching the tool of switch 1023, there are four inputs End and two output ends, moreover, three input terminals of the switching switch 1023 are separately connected three-phase power line, another input Two output ends of terminal connecting zero line, switching switch are separately connected two ac input ends of single phase ac charging pile (not shown), when So in other embodiments, the switching switch of one-out-three also may be selected in switching switch, and three of them input terminal connects three-phase confession respectively Electric line, the power input of an output end connection single phase ac charging pile, in addition, another input of single phase ac charging pile End is directly accessed the zero curve of total transformer.Control module 1021 is used to determine minimum load phase according to three-phase load information, pass through Control switching switch 1023 makes the supply line of the power input access minimum load phase of the single phase ac charging pile, and at this When single phase ac charging pile and electric vehicle establish CP handshake, the supply line using minimum load phase be electric vehicle into Row charging.
Further, control module 1021 be additionally operable to obtain the single phase ac charging pile current maximum available power it is (surplus Remaining power capacity), and judge whether current maximum available power is more than preset value, it is filled more than preset value, and in single phase ac When electric stake establishes CP handshake with electric vehicle, the supply line using minimum load phase is that electric vehicle charges. In one specific example, maximum available power can be obtained in the following manner:Two electric energy meters, one of electric energy meter can be set Current power general power P1 for acquiring community resident electricity consumption in real time, another electric energy meter for acquiring multiple single phase acs in real time The current charging general power P2 of charging pile, if the maximum rated power of cell distribution system is P0, the efficiency of cell transformer because Number is C0, then the current maximum available power of single phase ac charging pile is:P0*C0-P1-P2.In addition, only being filled in single phase ac When the current maximum available power of electric stake is more than preset value (for example, 1kW), it is electric vehicle just to allow the single phase ac charging pile Charging also reduces charging risk to avoid less efficiently charging.
Further, in conjunction with load control unit shown in Fig. 3, which further includes CP generation modules 1024, moreover, control module 1021 is additionally operable to when single phase ac charging pile and electric vehicle establish CP handshake, according to electricity The demand power of electrical automobile and current maximum available power, the rated power of single phase ac charging pile, determine the final of pwm signal Duty ratio;CP generation modules 1024 are used to generate pwm signal according to identified final duty ratio, and by CP lines to electronic vapour Vehicle transmits pwm signal.
Further, in conjunction with load control unit shown in Fig. 3, which further includes CP sampling modules 1025, wherein control module 1021 is additionally operable to carry out the current maximum available power and rated power of single phase ac charging pile Compare, and determine the first duty ratio of pwm signal according to the smaller value in the two, it should be noted that, power is accounted for first herein The correspondence of empty ratio, which is conducted with reference to GBT18487.1-2015 electric vehicles in charging system, to be provided in General Requirement in appendix A Charging current and duty ratio mapping relations.CP sampling modules 1025 are used to establish CP in single phase ac charging pile and electric vehicle When handshake, the second duty ratio of pwm signal is obtained from the master control borad of single phase ac charging pile, wherein the second duty ratio is Master control borad is determined according to the rated power of single phase ac charging pile and the demand power of electric vehicle.Moreover, control module 1021 are additionally operable to that when the second duty ratio is compared to the first duty, and the smaller value in the two is determined as pwm signal Final duty ratio.Finally it should be noted that, CP signals are the bridge for connecting single phase ac charging pile and electric vehicle, specifically: After control module 1021 detects plug in rifle signal by CP generation modules 1024, master control is fed back to by CP sampling modules 1025 Plate connects ready message, and then, the CP that control module 1021 starts to sample master control borad output by CP sampling modules 1025 is defeated Enter the second duty ratio of signal.Control module 1021 is by sampled data (the second duty ratio) and real time load data (the first duty Than) comparison after, the PWM wave of final duty ratio is exported to electric vehicle by CP generation modules 1024.
In addition, the load control unit of the embodiment further includes accessory power supply 1026, the accessory power supply 1026 is from total transformation Electricity is taken in a wherein phase supply line (for example, A phases) for device, after converted, module 1021 is powered in order to control.
Fig. 4 is a kind of structural schematic diagram of the second embodiment of AC charging system provided by the utility model, the implementation The AC charging system of example includes single phase ac charging pile and the load control unit that is built in the single phase ac charging pile 102 ' herein it should be noted that, the load control unit 102 ' of the embodiment compares load control unit 102 shown in Fig. 2, institute Different is only:The load control unit 102 ' of the embodiment is also integrated with the function of master control borad, that is, load control unit 102 ' And master control borad becomes one.
Fig. 5 is the structural schematic diagram of the first embodiment of load control unit in Fig. 4, the load control unit of the embodiment 102 ' include control module 1021 ', communication module 1022 ', switching switch 1023 ', CP generation modules 1024 ' and accessory power supply 1026 ', moreover, the load control unit of the embodiment compares load control unit shown in Fig. 3, the only difference is that, the reality The control module 1021 ' for applying example also has the function of master control borad in charging pile, therefore can save the CP in embodiment shown in Fig. 3 Sampling module.In this embodiment, control module 1021 ' is used to establish CP in single phase ac charging pile and electric vehicle and shake hands letter Number when, according to the demand power of electric vehicle and current maximum available power, the rated power of single phase ac charging pile, determine The final duty ratio of pwm signal.Specifically, control module 1021 ' is used for the current maximum available work of single phase ac charging pile Rate and rated power are compared, and the first duty ratio of pwm signal is determined according to the smaller value in the two;It is additionally operable to single-phase When alternating-current charging pile and electric vehicle establish CP handshake, according to the rated power of single phase ac charging pile and electric vehicle Demand power determines the second duty ratio of pwm signal;It is additionally operable to that when the second duty ratio is compared to the first duty, and by two Smaller value in person is determined as the final duty ratio of pwm signal.
Fig. 6 is a kind of flow diagram of the first embodiment of AC charging control method provided by the utility model, should The AC charging control method of embodiment is applied in single phase ac charging pile, and is included the following steps:
Step S10. obtains the three-phase load information of total transformer from backstage distributing monitoring system in real time;
Step S20. determines minimum load phase according to three-phase load information, and so that single phase ac is filled by controlling switching switch The supply line of the power input access minimum load phase of electric stake, and continue to that this charging terminates, wherein switch switch Three input terminals are separately connected three-phase power line, switch the output end of the output end connection single phase ac charging pile of switch;
Step S30. uses minimum load when judging that single phase ac charging pile establishes CP handshake with electric vehicle The supply line of phase is that electric vehicle charges.
In addition, at the end of electric vehicle is fully charged or other accidents lead to charging, CP signal level amplitudes can be triggered Change, it is synchronous to pass through CP sampling modules after the CP generation modules in load control unit detect that the level of CP signals changes Master control borad is fed back, to terminate to charge.
Further, further comprising the steps of between step S20 and step S30:
Step S40. obtains the current maximum available power of single phase ac charging pile;
Step S50. judges whether current maximum available power is more than preset value, if it is not, thening follow the steps S40;If so, Execute step S30.
In a specific embodiment, step S30 includes the following steps:
Step S31. is when judging that single phase ac charging pile establishes CP handshake with electric vehicle, according to electric vehicle Demand power and single phase ac charging pile current maximum available power, rated power, determine the final duty of pwm signal Than;
Step S32. transmits PWM letters by CP lines according to the final duty ratio of identified pwm signal to electric vehicle Number.
Further, step S31 includes the following steps:
The current maximum available power and rated power of single phase ac charging pile are compared by step S311., and according to Smaller value in the two determines the first duty ratio of pwm signal;
Step S312. charges when single phase ac charging pile and electric vehicle establish CP handshake according to single phase ac The rated power of stake and the demand power of electric vehicle determine the second duty ratio of pwm signal;
When the second duty ratio is compared S313. pairs of the first duty of step, and the smaller value in the two is determined as PWM The final duty ratio of signal.
Step in the method for the utility model embodiment can according to actual needs the adjustment of carry out sequence, merge and delete Subtract.Module or unit or subelement in the device of the utility model embodiment can be merged, be divided according to actual needs With delete.One of ordinary skill in the art will appreciate that all or part of step in the various methods of above-described embodiment is can be with It is completed come command terminal device-dependent hardware by program, which can be stored in a computer readable storage medium In, storage medium may include:Flash disk, read only memory ROM, random access device RAM, disk or CD etc..
Above disclosed is only the preferred embodiment of the utility model, certainly cannot be new to limit this practicality with this The interest field of type, those skilled in the art can understand all or part of the processes for realizing the above embodiment, and according to this Equivalent variations made by utility model claims, still fall within the scope of the utility model.

Claims (4)

  1. It is built-in or be external in single phase ac charging pile 1. a kind of load control unit, which is characterized in that including:
    Communication module for the three-phase load information for obtaining total transformer in real time from backstage distributing monitoring system;
    Switching switch, moreover, three input terminals of the switching switch are separately connected three-phase power line, the switching switch Output end connects the power input of single phase ac charging pile;
    The communication module and switching switch are connected, and for determining minimum load phase according to the three-phase load information, And switch the confession for making the power input of the single phase ac charging pile access the minimum load phase by controlling the switching The control module of electric line.
  2. 2. load control unit according to claim 1, which is characterized in that the control module is described in accessed The current maximum available power of single phase ac charging pile is more than preset value, and is built with electric vehicle in the single phase ac charging pile When vertical CP handshake, the supply line using the minimum load phase is that the electric vehicle charges.
  3. 3. load control unit according to claim 2, which is characterized in that further include:
    For generating pwm signal according to identified final duty ratio, and the PWM is transmitted to the electric vehicle by CP lines The CP generation modules of signal, wherein the final duty ratio is control module in the single phase ac charging pile and electric vehicle When establishing CP handshake, the current maximum according to the demand power of the electric vehicle and the single phase ac charging pile is available Determined by power, rated power.
  4. 4. a kind of AC charging system, including total transformer, which is characterized in that further include:
    Backstage distributing monitoring system for the three-phase load information for obtaining total transformer in real time;And
    Multiple single phase ac charging piles, and the single phase ac charging pile is communicated to connect with the backstage distributing monitoring system;
    Claim 1-3 any one of them load control units, and the load control unit is built-in or is external in the list Phase alternating-current charging pile.
CN201820161069.6U 2018-01-30 2018-01-30 Load control unit and AC charging system Active CN207994635U (en)

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109347128A (en) * 2018-11-20 2019-02-15 安徽天鹏电子科技有限公司 A kind of charging pile system and its method of equally loaded
CN110239392A (en) * 2019-07-03 2019-09-17 深圳市智行能源技术有限公司 A kind of safe and intelligent management method based on mobile power vehicle AC charging

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109347128A (en) * 2018-11-20 2019-02-15 安徽天鹏电子科技有限公司 A kind of charging pile system and its method of equally loaded
CN110239392A (en) * 2019-07-03 2019-09-17 深圳市智行能源技术有限公司 A kind of safe and intelligent management method based on mobile power vehicle AC charging

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GR01 Patent grant
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TR01 Transfer of patent right

Effective date of registration: 20201207

Address after: Room 101, building a, building 6, digital Economic Industrial Park, No. 201, Pufeng Road, hi tech Zone, Xi'an City, Shaanxi Province

Patentee after: Xi'an teride lingchong New Energy Technology Co., Ltd

Address before: 710065 Shaanxi city of Xi'an province high tech Zone No. 211 days Valley Ba Lu HUanpu science and Technology Industrial Park building E Building No. E206-2

Patentee before: Xi'an TGOOD Intelligent Charging Technology Co.,Ltd.

TR01 Transfer of patent right
EE01 Entry into force of recordation of patent licensing contract

Assignee: Xi'an TGOOD Intelligent Charging Technology Co.,Ltd.

Assignor: Xi'an teride lingchong New Energy Technology Co., Ltd

Contract record no.: X2021370010006

Denomination of utility model: Load control device and AC charging system

Granted publication date: 20181019

License type: Common License

Record date: 20210129

EE01 Entry into force of recordation of patent licensing contract