CN108092288A - Load control unit, AC charging system and control method - Google Patents
Load control unit, AC charging system and control method Download PDFInfo
- Publication number
- CN108092288A CN108092288A CN201810091105.0A CN201810091105A CN108092288A CN 108092288 A CN108092288 A CN 108092288A CN 201810091105 A CN201810091105 A CN 201810091105A CN 108092288 A CN108092288 A CN 108092288A
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- Prior art keywords
- phase
- charging pile
- power
- electric vehicle
- load
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- 238000005070 sampling Methods 0.000 claims description 10
- 230000005611 electricity Effects 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 12
- 238000005516 engineering process Methods 0.000 description 2
- WLJVNTCWHIRURA-UHFFFAOYSA-N Pimelic acid Chemical compound 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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/60—Monitoring or controlling charging stations
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
-
- 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
-
- 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
-
- 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
-
- 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
- Y02T90/14—Plug-in electric vehicles
-
- 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
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
Abstract
The present invention relates to a kind of load control unit, AC charging system and control method, which includes：Communication module, for obtaining the three-phase load information of total transformer in real time from backstage distributing monitoring system；Switching switch, moreover, three input terminals of switching switch connect three-phase power line, the power input of the output terminal connection single phase ac charging pile of switching switch respectively；Control module, for determining minimum load phase according to three-phase load information, by controlling switching switch that the power input of single phase ac charging pile is made to access the supply line of minimum load phase, and when single phase ac charging pile and electric vehicle establish CP handshake, charged using the supply line of minimum load phase for electric vehicle.Implement technical scheme, business or residential property is made to realize the three-phase equilibrium of power grid on the premise of additional high-power reactive-load compensation equipment is not increased, improve power grid quality.
Description
Technical field
The present invention relates to a kind of automobile charging field more particularly to load control unit, AC charging system and controlling parties
Method.
Background technology
The popularization of electric vehicle has become a kind of trend, and is that the charging station that electric vehicle charges includes independent charging station
And it is arranged on the charging station 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 for the development for coordinating electric vehicle, the later stage 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.
The content of the invention
To solve the problems, such as the tri-phase unbalance factor of the above-mentioned increase power grid in the presence of the prior art, the present invention provides one
Kind load control unit, AC charging system and control method, can realize the three-phase equilibrium of power grid, improve power grid quality.
The technical solution adopted by the present invention to solve the technical problems is：A kind of load control unit is constructed, it is built-in or outer
Single phase ac charging pile is connected to, including：
Communication module, for obtaining the three-phase load information of total transformer in real time from backstage distributing monitoring system；
Switching switch, moreover, three input terminals of the switching switch connect three-phase power line respectively, the switching is opened
The power input of the output terminal connection single phase ac charging pile of pass；
Control module, for determining minimum load phase according to the three-phase load information, by controlling the switching switch
The power input of the single phase ac charging pile is made to access the supply line of the minimum load phase, and in the single phase ac
When charging pile and electric vehicle establish CP handshake, using the supply line of the minimum load phase for the electric vehicle into
Row charges.
Preferably, the control module is additionally operable to obtain the current maximum available power of the single phase ac charging pile, and
Judge whether the current maximum available power is more than preset value, more than preset value, and the single phase ac charging pile with
When electric vehicle establishes CP handshake, charged using the supply line of the minimum load phase for the electric vehicle.
Preferably, CP generation modules are further included, moreover,
The control module is additionally operable to when the single phase ac charging pile and electric vehicle establish CP handshake, root
According to the demand power of the electric vehicle and current maximum available power, the rated power of the single phase ac charging pile, determine
The final duty cycle of pwm signal；
The CP generation modules for generating pwm signal according to identified final duty cycle, and pass through CP lines to described
Electric vehicle transmits the pwm signal.
Preferably,
When the load control unit is built in the single phase ac charging pile,
The control module, for the current maximum available power of the single phase ac charging pile and rated power to be carried out
Compare, and the smaller value in the two determines the first duty cycle of pwm signal；In the single phase ac charging pile and electronic vapour
When vehicle establishes CP handshake, obtained according to the demand power of the rated power of the single phase ac charging pile and the electric vehicle
The second duty cycle of pwm signal is taken, and when second duty cycle is compared to first duty, and will be in the two
Smaller value is determined as the final duty cycle of pwm signal；
When the load control unit is external in the single phase ac charging pile, the load control unit further includes CP
Sampling module, moreover,
The CP sampling modules, for when the single phase ac charging pile and electric vehicle establish CP handshake, from
The master control borad of the single phase ac charging pile obtains the second duty cycle of pwm signal；
The control module, be additionally operable to by the current maximum available power of the single phase ac charging pile and rated power into
Row compares, and the smaller value in the two determines the first duty cycle of pwm signal；And to first duty when described
Two duty cycles are compared, and the smaller value in the two is determined as to the final duty cycle of pwm signal.
The present invention also constructs a kind of AC charging system, including total transformer, further includes：
For obtaining the backstage distributing monitoring system of the three-phase load information of 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.
The present invention also constructs a kind of AC charging control method, comprises 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 the three-phase load information, and passes through and switching switch is controlled to make blow-up
The power input of current charge stake accesses the supply line of the minimum load phase, wherein, three inputs of the switching switch
End connects three-phase power line, the power input of the output terminal connection single phase ac charging pile of the switching switch respectively；
Step S30. is when judging that the single phase ac charging pile establishes CP handshake with electric vehicle, using described
The supply line of minimum load phase charges for the electric vehicle.
Preferably, it is further comprising the steps of between the step S20 and the step S30：
Step S40. obtains the current maximum available power of the single phase ac charging pile；
Step S50. judges whether the current maximum available power is more than preset value, if it is not, then performing the step
S40；If so, perform the step S30.
Preferably, the step S30 comprises the following steps：
Step S31. is when judging that the single phase ac charging pile establishes CP handshake with electric vehicle, according to described
Current maximum available power, the rated power of the demand power of electric vehicle and the single phase ac charging pile, determine pwm signal
Final duty cycle；
Step S32., should to electric vehicle transmission by CP lines according to the final duty cycle of identified pwm signal
Pwm signal.
Preferably, the step S31 comprises the following steps：
The current maximum available power of the single phase ac charging pile and rated power are compared by step S311., and
Smaller value in the two determines the first duty cycle of pwm signal；
Step S312. is when the single phase ac charging pile and electric vehicle establish CP handshake, according to described single-phase
The demand power of the rated power of alternating-current charging pile and the electric vehicle determines the second duty cycle of pwm signal；
To first duty, when second duty cycle is compared step S313., and by the smaller value in the two
It is determined as the final duty cycle of pwm signal.
Implement technical scheme, load control unit of the invention can in real time be obtained according to backstage distributing monitoring 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 taken, makes business
Or residential property realizes the three-phase equilibrium of power grid on the premise of additional high-power reactive-load compensation equipment is not increased, and improves power grid
Quality.
In addition, the load control unit of the present invention also realizes charge power by changing the duty cycle of CP signal PWM waves
Adjusting, so as to solve the problems, such as that the limited built cell of power capacity can not carry out electric load scheduling in real time and multi-brand is old
Old charging pile can not be unified to carry out the problem of power is adjusted in real time in situation about not powering off.Improve built cell load scheduling
Flexibility and the utilization rate of charging pile.
Description of the drawings
It in order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention, for those of ordinary skill in the art, without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the circuit diagram of business or cell AC charging system of the invention；
Fig. 2 is a kind of structure diagram of the first embodiment of AC charging system provided by the invention；
Fig. 3 is the structure diagram of the first embodiment of load control unit in Fig. 2；
Fig. 4 is a kind of structure diagram of the second embodiment of AC charging system provided by the invention；
Fig. 5 is the structure 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 invention.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment belongs to the scope of protection of the invention.
Fig. 1 is the circuit diagram of business or cell AC charging system of the invention, in the AC charging system, backstage
Distributing monitoring system 20 accesses the supply line of total transformer, and the three-phase load information for obtaining total transformer in real time.It is more
A single phase ac charging pile 11,12 ..., 1N the supply line of total transformer is accessed by respective load control unit respectively,
Moreover, each single phase ac charging pile 11,12 ..., 1N be attached by order wire and backstage distributing monitoring system 20, when
So it can also carry out wireless communication connection.It should be noted that in other embodiments, load control unit can also be built in blow-up
In current charge stake.
Fig. 2 is a kind of structure diagram of the first embodiment of AC charging system provided by the invention, the embodiment
AC charging system includes single phase ac charging pile and is external in the load control unit 102 of the single phase ac charging pile, and should
Single phase ac charging pile includes charging gun (not shown), master control borad 101.In addition, load control unit 102 accesses total transformer
A, B, C three-phase power line and zero curve N.After single phase ac charging pile activation (such as user's triggering), load control unit
102 obtain three-phase load information in real time from backstage distributing monitoring system 20, and switch 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, to feed back, the connection of charging gun is ready, fills by changing the level magnitude of CP signals for electric vehicle
Establish the states such as beginning, charging termination by cable, load control unit 102 adjusts electricity by changing the final duty cycle of CP signal PWM waves
The charge power of electrical automobile, so as to realize electric load scheduling in the case where single phase ac charging pile is not stopped.
To sum up, single phase ac charging pile of the invention is to have the function of three-phase power line selection, the charging of power dispatching
Stake, in addition, the single phase ac charging pile has further included metering module, display module etc..
Fig. 3 is the structure 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
It crosses serial mode and the real time load data of every phase distribution is sent to control module 1021.There are four inputs for the tool of switching switch 1023
End and two output terminals, moreover, three input terminals of the switching switch 1023 connect three-phase power line respectively, another input
Terminal connecting zero line, two output terminals of the switching switch connect two ac input ends of single phase ac charging pile (not shown) respectively, 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 terminal 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, passes through
Control switching switch 1023 makes the power input of the single phase ac charging pile access the supply line of minimum load phase, and at this
When single phase ac charging pile and electric vehicle establish CP handshake, using the supply line of minimum load phase for electric vehicle into
Row charges.
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, charged using the supply line of minimum load phase for electric vehicle.
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
For gathering the current power general power P1 of community resident electricity consumption in real time, another electric energy meter is used to gather 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, it is only 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
It charges, so as to avoid less efficiently charging, also reduces charging risk.
Further, with reference to 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 cycle；CP generation modules 1024 are used to generate pwm signal according to identified final duty cycle, and pass through CP lines to electronic vapour
Vehicle transmits pwm signal.
Further, with reference to 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 the smaller value in the two determines the first duty cycle of pwm signal, it should be noted that, power is accounted for first herein
The correspondence of empty ratio 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 cycle mapping relations.CP sampling modules 1025 are used to establish CP in single phase ac charging pile and electric vehicle
During handshake, the second duty cycle of pwm signal is obtained from the master control borad of single phase ac charging pile, wherein, the second duty cycle 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 cycle is compared to the first duty, and the smaller value in the two is determined as pwm signal
Final duty cycle.Finally it should be noted that, CP signals is connect the bridge of 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 cycle of signal.Control module 1021 is by sampled data (the second duty cycle) and real time load data (the first duty
Than) comparison after, the PWM wave of final duty cycle 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 structure diagram of the second embodiment of AC charging system provided by the invention, the embodiment
The load control unit 102 ' that AC charging system includes single phase ac charging pile and is built in the single phase ac charging pile exists
This it should be noted that, the load control unit 102 ' of the embodiment is different compared to load control unit 102 shown in Fig. 2
Only it is：The load control unit 102 ' of the embodiment is also integrated with the function of master control borad, i.e. load control unit 102 ' and master control
Plate becomes one.
Fig. 5 is the structure 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, different is only the reality
Applying the control module 1021 ' of 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 ', which is used to establishing CP in single phase ac charging pile and electric vehicle, shakes 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 cycle 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 smaller value in the two determines the first duty cycle of pwm signal；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 cycle of pwm signal；It is additionally operable to that when the second duty cycle is compared to the first duty, and by two
Smaller value in person is determined as the final duty cycle of pwm signal.
Fig. 6 is a kind of flow diagram of the first embodiment of AC charging control method provided by the invention, the implementation
The AC charging control method of example is applied in single phase ac charging pile, and is comprised 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 passes through and switching switch is controlled to fill single phase ac
The supply line of the power input access minimum load phase of electric stake, and continue to that this charging terminates, wherein, switching switch
Three input terminals connect three-phase power line, the output terminal of the output terminal connection single phase ac charging pile of switching switch respectively；
Step S30. uses minimum load when judging that single phase ac charging pile establishes CP handshake with electric vehicle
The supply line of phase charges for electric vehicle.
In addition, at the end of electric vehicle is fully charged or other accidents cause 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, so as to complete charge.
Further, it is 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, then performing step S40；If so,
Perform step S30.
In a specific embodiment, step S30 comprises 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 cycle of identified pwm signal to electric vehicle
Number.
Further, step S31 comprises 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 cycle 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 cycle of pwm signal；
To the first duty, when the second duty cycle is compared step S313., and the smaller value in the two is determined as PWM
The final duty cycle of signal.
Step in the method for the embodiment of the present invention can be sequentially adjusted, merged and deleted according to actual needs.This
Module or unit or subelement in the device of inventive embodiments can be combined, divided and deleted according to actual needs.This
The all or part of step that field those of ordinary skill is appreciated that in the various methods of above-described embodiment is can to pass through program
Carry out the device-dependent hardware of command terminal to complete, which can be stored in a computer readable storage medium, and storage is situated between
Matter can include：Flash disk, read only memory ROM, random access device RAM, disk or CD etc..
The above disclosed right for being only presently preferred embodiments of the present invention, the present invention cannot being limited with this certainly
Scope, one of ordinary skill in the art will appreciate that realize all or part of flow of above-described embodiment, and according to right of the present invention
It is required that the equivalent variations made, still fall within and invent covered scope.
Claims (9)
- 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 obtaining the three-phase load information of total transformer in real time from backstage distributing monitoring system；Switching switch, moreover, three input terminals of the switching switch connect three-phase power line respectively, the switching switch Output terminal connects the power input of single phase ac charging pile；Control module, for determining minimum load phase according to the three-phase load information, by the way that the switching switch is controlled to make institute The power input for stating single phase ac charging pile accesses the supply line of the minimum load phase, and charges in the single phase ac When stake establishes CP handshake with electric vehicle, filled using the supply line of the minimum load phase for the electric vehicle Electricity.
- 2. load control unit according to claim 1, which is characterized in thatThe control module is additionally operable to obtain the current maximum available power of the single phase ac charging pile, and judges described work as Whether preceding maximum available power is more than preset value, is built more than preset value, and in the single phase ac charging pile with electric vehicle During vertical CP handshake, charged using the supply line of the minimum load phase for the electric vehicle.
- 3. load control unit according to claim 1 or 2, which is characterized in that CP generation modules are further included, moreover,The control module is additionally operable to when the single phase ac charging pile and electric vehicle establish CP handshake, according to institute The demand power of electric vehicle and current maximum available power, the rated power of the single phase ac charging pile are stated, determines that PWM believes Number final duty cycle；The CP generation modules for generating pwm signal according to identified final duty cycle, and pass through CP lines to described electronic Automobile transmits the pwm signal.
- 4. load control unit according to claim 3, which is characterized in thatWhen the load control unit is built in the single phase ac charging pile,The control module, for the current maximum available power of the single phase ac charging pile and rated power to be compared Compared with, and the smaller value in the two determines the first duty cycle of pwm signal；In the single phase ac charging pile and electric vehicle When establishing CP handshake, obtained according to the demand power of the rated power of the single phase ac charging pile and the electric vehicle Second duty cycle of pwm signal, and when second duty cycle is compared to first duty, and by the two compared with Small value is determined as the final duty cycle of pwm signal；When the load control unit is external in the single phase ac charging pile, the load control unit further includes CP samplings Module, moreover,The CP sampling modules, for when the single phase ac charging pile and electric vehicle establish CP handshake, from described The master control borad of single phase ac charging pile obtains the second duty cycle of pwm signal；The control module is additionally operable to compare the current maximum available power of the single phase ac charging pile and rated power Compared with, and the smaller value in the two determines the first duty cycle of pwm signal；And first duty when described second is accounted for Empty ratio is compared, and the smaller value in the two is determined as to the final duty cycle of pwm signal.
- 5. a kind of AC charging system, including total transformer, which is characterized in that further include：For obtaining the backstage distributing monitoring system of the three-phase load information of total transformer in real time；AndMultiple single phase ac charging piles, and the single phase ac charging pile is communicated to connect with the backstage distributing monitoring system；Claim 1-4 any one of them load control units, and the load control unit is built-in or is external in the list Cross streams charging pile.
- 6. a kind of AC charging control method, which is characterized in that comprise 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 the three-phase load information, and passes through and switching switch is controlled to fill single phase ac The power input of electric stake accesses the supply line of the minimum load phase, wherein, three input terminals point of the switching switch Three-phase power line, the power input of the output terminal connection single phase ac charging pile of the switching switch are not connected；Step S30. uses the minimum when judging that the single phase ac charging pile establishes CP handshake with electric vehicle The supply line of load phase charges for the electric vehicle.
- 7. AC charging control method according to claim 6, which is characterized in that in the step S20 and the step It is further comprising the steps of between S30：Step S40. obtains the current maximum available power of the single phase ac charging pile；Step S50. judges whether the current maximum available power is more than preset value, if it is not, then performing the step S40；If It is then to perform the step S30.
- 8. AC charging control method according to claim 7, which is characterized in that the step S30 comprises the following steps：Step S31. is when judging that the single phase ac charging pile establishes CP handshake with electric vehicle, according to described electronic Current maximum available power, the rated power of the demand power of automobile and the single phase ac charging pile, determine pwm signal most Whole duty cycle；Step S32. transmits PWM letters by CP lines according to the final duty cycle of identified pwm signal to the electric vehicle Number.
- 9. AC charging control method according to claim 8, which is characterized in that the step S31 comprises the following steps：The current maximum available power of the single phase ac charging pile and rated power are compared by step S311., and according to Smaller value in the two determines the first duty cycle of pwm signal；Step S312. is when the single phase ac charging pile and electric vehicle establish CP handshake, according to the single phase ac The demand power of the rated power of charging pile and the electric vehicle determines the second duty cycle of pwm signal；To first duty, when second duty cycle is compared step S313., and the smaller value in the two is determined For the final duty cycle of pwm signal.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109696592A (en) * | 2018-12-18 | 2019-04-30 | 广东电网有限责任公司 | A kind of charger test load control method, device and storage medium |
| CN110525241A (en) * | 2019-08-12 | 2019-12-03 | 国家电网有限公司 | The device and method that the power of a kind of pair of wireless charging system receiving end is adjusted |
| CN112193100A (en) * | 2020-10-14 | 2021-01-08 | 厦门银河龙芯科技有限公司 | Phase rotation supported electric automobile intelligent charging method and equipment |
| CN112248841A (en) * | 2020-12-22 | 2021-01-22 | 菲尼克斯(南京)新能源汽车技术有限公司 | Electric automobile charging plug supporting ordered charging and method for realizing ordered charging |
| CN112290566A (en) * | 2020-11-05 | 2021-01-29 | 张岳 | Three-phase balancing method and system for alternating-current charging pile |
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- 2018-01-30 CN CN201810091105.0A patent/CN108092288A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109696592A (en) * | 2018-12-18 | 2019-04-30 | 广东电网有限责任公司 | A kind of charger test load control method, device and storage medium |
| CN109696592B (en) * | 2018-12-18 | 2021-06-08 | 广东电网有限责任公司 | Charger test load control method and device and storage medium |
| CN110525241A (en) * | 2019-08-12 | 2019-12-03 | 国家电网有限公司 | The device and method that the power of a kind of pair of wireless charging system receiving end is adjusted |
| CN112193100A (en) * | 2020-10-14 | 2021-01-08 | 厦门银河龙芯科技有限公司 | Phase rotation supported electric automobile intelligent charging method and equipment |
| CN112290566A (en) * | 2020-11-05 | 2021-01-29 | 张岳 | Three-phase balancing method and system for alternating-current charging pile |
| CN112248841A (en) * | 2020-12-22 | 2021-01-22 | 菲尼克斯(南京)新能源汽车技术有限公司 | Electric automobile charging plug supporting ordered charging and method for realizing ordered charging |
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Application publication date: 20180529 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 invention: Load control device, AC charging system and control method License type: Common License Record date: 20210129 |
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