CN106329686A - AC charging pile based on three-phase load imbalance automatic compensation - Google Patents
AC charging pile based on three-phase load imbalance automatic compensation Download PDFInfo
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- CN106329686A CN106329686A CN201610777127.3A CN201610777127A CN106329686A CN 106329686 A CN106329686 A CN 106329686A CN 201610777127 A CN201610777127 A CN 201610777127A CN 106329686 A CN106329686 A CN 106329686A
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
- H02J3/1835—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control
- H02J3/1842—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control wherein at least one reactive element is actively controlled by a bridge converter, e.g. active filters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses an AC charging pile based on three-phase load imbalance automatic compensation, and the charging pile comprises a main MCU unit. The MCU unit is connected with a card reading unit, a three-phase charging circuit unit, an input unit, a display unit, a metering unit, an electromagnetic cabin unit, a voice guide unit, a standby power unit, an anti-thunder electric leakage unit, a communication unit and an inclination angle detection unit. The three-phase charging circuit unit is connected to a three-phase power grid, and the three-phase power grid is connected with a reactive compensation device. Compared with the prior art, the standby power unit can effectively enable the charging pile to work normally, and maintains the integrity of charging. Meanwhile, the standby power unit can be charged in a circulating manner when the power is connected again, so as to prolong the service life of the standby power unit can and a vehicle-mounted battery. Moreover, the employed reactive compensation device enables the power grid to timely reach balanced, thereby greatly reducing the consumption of reactive power, reducing the high cost of conventional compensation equipment, and also improving the charging efficiency and utilization ratio of electric energy.
Description
Technical field
The present invention relates to alternating-current charging pile three-phase electricity and compensate equipment technical field, particularly to one based on three-phase load not
The alternating-current charging pile that balance compensates automatically.
Background technology
Automobile is once described as changing the machine in the world, while bringing quick mode of transportation to us, also creates energy
The series of problems such as source safety, environmental pollution and global warming.At present, energy-saving and emission-reduction have become the head of Global Auto industry
Wanting task, development new-energy automobile to become the strategic direction of Global Auto industry, new-energy automobile is expected to become and again changes
The machine in the world.
Electric automobile, as the prominent representative of new energy development, has become as replacement traditional power automobile, leads garage
The important development direction of industry New Times.Instantly, world car industry the most actively throws oneself into exploitation and the extension process of electric automobile
In, national governments and enterprise have put into a large amount of human and material resources and financial resources in electric automobile field.China indulges three horizontal research and development cloth three
Under the policy guide of office, electric automobile career development is the rapidest.
Battery and charging technique are the bottlenecks of electric vehicle development, and its business development and operation way thereof are in some sense
Determine the popularization degree of electric automobile and business-like space.Meanwhile, charging station is also the first sign in new-energy automobile epoch.?
Under new forms of energy policy support, it is contemplated that 2011-2015 China average annual new-energy automobile demand is up to 350,000, within 2015, need
The amount of asking will reach 970,000.As the infrastructure of new-energy automobile, electric automobile charging station is expected to prior to new-energy automobile market
Outburst.
Alternating-current charging pile provides energy recharge as the operation of electric automobile, is important necessary to Development of Electric Vehicles joining
Set infrastructure.
Alternating-current charging pile provides ac charging power supply, alternating-current charging pile one to the electric passenger vehicle with Vehicular charger
As build in parking lot or roadside, have that power is less, floor space little, build easily, input flexible, disposable of layouting is little
Etc. feature.Although it is very simple to build single alternating-current charging pile, but alternating-current charging pile network to be formed could to meet electric automobile general
And needs.
But whole electrically-charging equipment industry is also at starting and technology stage of fumbling, and alternating-current charging pile the most on the market is from outward
See structure, electrical design, control mechanism and all deposit the biggest room for improvement.The three-phase that especially three-phase charge circuit unit connects
Electrical network, existing charging pile is nearly all single-phase load, and the electricity consumption of user has asynchronism, and this makes distribution transforming system easily
The situation of three-phase imbalance, and degree of unbalancedness severe overweight occur, degree of unbalancedness is too high reaches 34%, makes reactive power simultaneously
High, cause serious power wastage.
Existing charging pile low-voltage distribution system commonly uses switched capacitor, and it exists compensation step, easily goes out
Now crossing benefit or owe to mend, compensation effect is poor.
Summary of the invention
For the deficiencies in the prior art, it is an object of the invention to provide one based on three-phase load unbalance certainly
The dynamic alternating-current charging pile compensated, it is possible to the imbalance that the distribution end being connected existing charging pile occurs compensates, makes each
Phase current or voltage basically reach poised state, so that its reactive power substantially reduces, improve charge efficiency and electric energy profit
By rate.
The technical scheme is that and be achieved in that:
A kind of alternating-current charging pile automatically compensated based on three-phase load unbalance, including main MCU unit, and this main MCU is mono-
Unit by total data line be distributed connection have card reading unit, three-phase charge circuit unit, input block, display unit, metering units,
Electromagnetism warehouse receipt unit, voice guide unit, standby power unit, lightning protection electric leakage unit, communication unit, inclination angle detection unit, described
Card reading unit, charge circuit unit, input block, display unit, metering units, electromagnetism warehouse receipt unit, voice guide unit, standby
Power subsystem, lightning protection electric leakage unit, communication unit, inclination angle detection unit are connected with main MCU unit respectively, described display unit
Including Operation display module and equipment state display module, described three-phase charge circuit unit accesses three phase network, described three-phase
Electrical network connects reactive power compensator.
Preferably, described reactive power compensator includes
Controller；
Signal picker, is electrically connected to the three-phase bus of electrical network, the voltage/current signals of detection three-phase bus, and communication
It is connected to described controller；
IGBT drives, and is electrically connected at described controller and is driven by；
The chain link of two series connection, each chain link all includes two or more inverter circuit in parallel and end and each inversion electricity
The DC capacitor that road is in parallel；
Three-phase bus is connected to the series circuit between two chain links by a connection line respectively, all includes in each phase line
There are reactor and the chopper of series connection.
Preferably, reactive power compensator also includes three spark gaps, is electrically connected with in each described chopper and each institute
State the circuit between reactor.
Preferably, described controller, described IGBT driving, each described reactor and each described chain link are packaged in one
In SPC cabinet, form a SPC module.
Preferably, it is characterised in that described SPC cabinet is provided with many binding posts of XA～XN, with electric with each phase bus
Property connect.
Preferably, the communication by the way of wirelessly or non-wirelessly of described signal picker is connected to described controller.
Preferably, described standby power unit includes charging circuit subelement, discharge circuit subelement and 12V/5A's
Lead-acid battery.
Preferably, communication unit includes uplink communication unit and downgoing communication unit, and described alternating-current charging pile is by up
Communication unit and background monitoring system carry out communication, and described alternating-current charging pile is carried out with Vehicular charger by downgoing communication unit
Communication.
Preferably, described uplink communication unit include Ethernet, GPRS/CDMA, RS232, infrared in one or many
Kind.
Preferably, described downgoing communication unit includes the one between pwm signal bus, CAN, RS485 or many
Kind.
Compared with prior art, the present invention has a following beneficial effect:
Automatically the alternating-current charging pile compensated based on three-phase load unbalance of the present invention, standby power unit can effectively make
Charging pile normally works 24 hours, maintains the integrity of charging, reduces the charging caused because having a power failure and complains, meanwhile, when
When again sending a telegram here, standby power unit can be circulated charging, to extend standby power unit and on-vehicle battery life-span；Additionally
It also solve original metal keyboard waterproof be connected with charging pile complete machine problem, charging pile man-machine interaction waterproof problem and
The problem of keyboard service life；And the reactive power compensator used, make electrical network reach poised state in time, greatly reduce idle
The consumption of power, and reduce the high cost of conventional compensation equipment, improve charge efficiency and utilization rate of electrical simultaneously.
Accompanying drawing explanation
Fig. 1 is the circuit block diagram of the alternating-current charging pile that the present invention compensates automatically based on three-phase load unbalance；
Fig. 2 is the connection diagram after the encapsulation of the present invention；
Fig. 3 is the current compensation principle schematic of the present invention；
Fig. 4 is the voltage support principle schematic of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into the scope of protection of the invention.
As it is shown in figure 1, a kind of alternating-current charging pile automatically compensated based on three-phase load unbalance, including main MCU unit, and
This main MCU unit by total data line distribution connection have card reading unit, three-phase charge circuit unit, input block, display unit,
Metering units, electromagnetism warehouse receipt unit, voice guide unit, standby power unit, lightning protection electric leakage unit, communication unit, inclination angle detection
Unit, described card reading unit, charge circuit unit, input block, display unit, metering units, electromagnetism warehouse receipt unit, voice guide
Unit, standby power unit, lightning protection electric leakage unit, communication unit, inclination angle detection unit are connected with main MCU unit respectively, described
Display unit include Operation display module and equipment state display module, described three-phase charge circuit unit accesses three-phase electricity
Net, described three phase network connects reactive power compensator.
Introduce composition and the function of charging pile each unit separately below:
Card reading unit: compatible various contacts and non-contact IC card, is effectively written and read subscriber card, by user profile
Feed back to charger and fill main MCU；
Input block: " capacitance touch inductive keyboard " is placed in acrylic panel back, by touching acrylic panel,
Effectively the information of man-machine interaction is sent to the main MCU of charging pile；
Electromagnetism warehouse receipt unit: electromagnetism storehouse is mainly used for connecting charging plug, and confirms whether charging plug is fully connected, and
And during whole charging, by door locking, to guarantee the safety of whole charging process, prevent charging gun from being stolen by people simultaneously
Walk；
Voice guide unit: according to whole charging process, the work to any one stage carries out voice guide, in order to use
What family was easier completes whole charging process；
Display unit: mainly by 7 cun of liquid crystal display screens, three " RUN "s, " charging ", " fault " display lamps are constituted, and show
Record of charging, warning message, battery information, system information, the electricity of accumulator.Device parameter, unit price can also be set.Instruction
Lamp is when charging: " RUN ", " charging " display lamp meeting Chang Liang, and LCD screen shows " charging ".Time standby: " RUN " refers to
Show lantern festival Chang Liang；" standby " is shown on LCD screen.Malfunction: " fault " display lamp meeting Chang Liang, LCD screen shows " therefore
Barrier "；
Metering units: according to existing period rate, the charge capacity of user is accurately measured, simultaneously by power consumption
Calculate；
Memory element: local solid-state memory is up to 32M, by user profile, charge information, the parameters of electric automobile
Carry out local preservation, user's valid data of more than 3 months can be preserved；
Charge circuit unit: be mainly used in forceful electric power deciliter；
Lightning protection electric leakage unit: comprise two major parts: one is lightning-protection module, on the other hand electric leakage module；Owing to charging pile is most
Being arranged on open air, after power line is struck by lightning, at lightning-protection module dress electric power incoming line, the effect of lightning-protection module is used to protection electricity
The one that in Force system, various electric equipments damage from lightning surge, switching overvoltage, Frequency Transient Overvoltage impact
Electrical equipment.Lightning-protection module be sense on circuit after high pressure moment circuit and " " UNICOM, lightning current of releasing.Reach protection
The purpose of charging pile.Electric leakage module, connects the earth when the phase line of protected circuit directs or through unexpected load, and
Producing approximate sine wave and its virtual value is slowly varying residual current, when this electric current is more than certain numerical value, electric leakage is protected
Protecting device and cut off this circuit, earth leakage protective device, when realizing, can use zero sequence current mutual inductor, and its effect is reflection electric leakage electricity
Stream signal, therefore constitute the detection part of whole earth leakage protective device；Also have for measuring and amplifying leakage current signal part, constitute leakage
The comparison of non-electricity protector, control part；A.C. contactor can be used to constitute earth leakage protective executable portion.Sending out when charging pile
During raw electric leakage, quickly separate with power supply, it is ensured that the personal and safety of whole power utilization environment；
Standby power unit: comprise the lead-acid battery of charging circuit, discharge circuit, 12V/5A, at power supply state, charged electrical
Road carries out blood pressure lowering, rectification to 220V circuit, judges the voltage of battery simultaneously, if under-voltage, is then charged it；Work as charging pile
Being in power down mode, whole charging pile can be powered by lead-acid battery by discharge circuit, the capacity energy of current lead-acid battery
Guarantee that charging pile can be swiped the card in 24 hours clearing, take out charging cable from electromagnetism storehouse；
Communication unit: communication module comprises up: Ethernet, GPRS/CDMA, RS232, infrared；Downstream packets containing CAN,
RS485；Descending employing RS485 is connected with electric energy meter；Alternating-current charging pile carries out communication by CAN and Vehicular charger, logical
Cross the mode that CAN communication shakes hands and judge whether charger is correctly connected with alternating-current charging pile, as the most correctly connected, then cannot start
Charging process；Obtain the relevant parameter information of accumulator, such as battery tension, dump energy, battery temperature etc..Alternating-current charging pile
Up charge information can be uploaded to main website, in order to main by GPRS/CDMA or Ethernet and background monitoring system communication
Stand and whole charging system is managed.
, when charging pile because by vehicle collision, there is angle in inclination angle detection unit: have inclination angle detection to design inside charging pile
During inclination, main power circuit can be automatically cut off, to protect life and the safety of whole power utilization environment.
Main MCU: use 32 risc chips, carries out the collection of data, transmission by CAN, 485 buses, Ethernet
Data and the data of collection judge, and carry out keeping the connection of network to bear logical with backstage according to standard agreement according to standard
News management function.Control system association bar processes all module design task as requested.
Reactive power compensator: as in figure 2 it is shown, it is mainly by controller 1, signal picker 2, IGBT driving 3 and two
The SVG module that chain structure is formed is formed.
Described controller 1, for controlling arithmetic center, has DSP digital signal processing chip and pwm signal is sent out inside it
Raw device, and support remote data transmission function, this function is completed by 485 communication interfaces.
Described IGBT drives 3 can export sufficiently large push pull electric current, with fast enough to IGBT gate capacitance charge and discharge
Electricity, to open or to close IGBT fast enough, the switching characteristic of this frequency modulation response can realize the reality to voltage or electric current
Time compensate.
Described signal picker 2 can gather voltage or the current signal of three-phase bus end, and by wireless or
Voltage signal or the current signal of collection are transferred to described controller 1 internal control DSP computational analysis, then root by wired mode
According to described controller 1 arrange control PWM signal generator send control signal to IGBT make inverter circuit produce meet want
The reactive-load compensation electric current asked.
When CT (current transformer) that described signal picker 2 is the current signal gathering three-phase bus end, for following
Work process:
As it is shown on figure 3, CT (current transformer) is for detecting the electricity on the three-phase bus between electrical network and unbalanced load
Stream signal, as the electric current between the three-phase bus that detects under original state is divided into 5A, 10A, 15A, each phase that CT will detect
Current signal is sent to described controller 1 and carries out Treatment Analysis, and the numerical value set according to controller 1 judges whether system is located
In unbalanced state, calculate the current value of the required conversion of each phase bus when reaching poised state, then by described control simultaneously
PWM signal generator in device 1 processed transmits drive signals to described IGBT and drives and make it to start action, by three-phase bus
Out-of-balance current from electric current big transfer to mutually the little phase of electric current (as Fig. 2 arrow instruction the sense of current), finally make three
The most all reach the poised state of setting value.
When described signal picker 2 is the voltage signal gathering three-phase bus end, its work process is as follows:
As shown in Figure 4, it is a compensation respectively at the connection line 6 being connected with three-phase bus and the connection node of each phase bus
Point, arrange at each compensation point one can the signal picker 2 of detectable voltage signals, the voltage of compensation point is being sampled
After, information of voltage is passed to described controller 1 by described signal picker 2, and described controller 1 is via internal DSP numeral letter
Number process after chip processes and to judge whether the voltage signal of each compensation point exceedes or less than setting value, when the voltage letter detected
When number exceeding the pressure regulation upper limit, described controller 1 drives the SVG module output perception electricity that described IGBT makes to be made up of each inverter circuit
Stream, thus reduce voltage；When the voltage signal low-pressure adjusting pressure detected in limited time, described controller 1 drive described IGBT make by
SVG module output capacity current (such as arrow direction indication in Fig. 3, for capacity current outbound course) of each inverter circuit composition,
When needs output capacity current, standby voltage compensating line 11 can be set specially and be connected with described bus, female to promote this phase
Voltage on line, finally makes each phase voltage stable within normal range.
Described controller 1, described IGBT drive 3, each described reactor 7 and each described by inverter circuit 4 and unidirectional current
The chain link holding 5 compositions is packaged in a SPC cabinet 8, forms a SPC module 9, is provided with multiple connecing on described SPC cabinet 8
Line terminals 901, each binding post 901 is electrically connected with the outside of each described reactor 7 respectively, and by each described binding post
901 can be electrically connected with the three-phase bus of described electrical network easily.
Shown in Fig. 4, described SPC cabinet 901 is provided with multiple binding post such as XA, XB, XC and XN, therein
XA, XB, XC binding post 901 can be electrically connected with each live wire of three-phase bus, and XN therein can be connected with the zero line of electrical network, also
One PE binding post can be set, for ground connection.
Further, for ensureing the stability of the present invention, between three-phase bus and each reactor 7, it is provided with spark gap
10, its one end electrically connects with each phase bus, and the other end is common ground end, also includes three spark gaps, be electrically connected with in
Circuit between each described chopper and each described reactor.
After applying this reactive power compensator, for the electricity consumption electrical network of charging pile, this reactive power compensator three-phase is being installed
Current imbalance is serious, and out-of-balance current is about 50A, and neutral line current reaches 44A；After compensation, three-phase current is in a basic balance, uneven
Weighing apparatus electric current is about 2A, and neutral line current drops to 15A, and degree of unbalancedness is dropped to 1% by 34%.
Included by this alternating-current charging pile, standby power unit operation principle is: this alternating-current charging pile provides AC220V/7kw
Alternating Current Power Supply ability, at power supply state, charging circuit carries out blood pressure lowering, rectification to 220V circuit, judges the voltage of battery simultaneously,
If under-voltage, then it is charged；When charging pile is in power down mode, lead-acid battery can be by discharge circuit to whole charging
Stake is powered, and the capacity of current lead-acid battery can ensure that charging pile can be swiped the card in 24 hours clearing, takes out from electromagnetism storehouse and charges
Cable.
Refer to Fig. 2, electric automobile DC charging motor charging flow is as follows:
1) user holds subscriber card, swipes the card on alternating-current charging pile, and alternating-current charging pile reads user profile, by " soft-touch type
Induction keyboard " input password, user profile is uploaded to main website simultaneously, and makes corresponding authority identification；
2) alternating-current charging pile main control module judges that user is the most correct, if having enough remaining sums, if user
Correct and have the enough amount of money, then open socket door lock, prompting connects charging plug；
3) refer to Fig. 3 and 4, alternating-current charging pile master control molding closes Fig. 4 S1, sends ± 12V pwm signal, when vehicle-mounted
When charger receives pwm signal, confirming that charging gun is connected with charging socket and put in place, the voltage of test point 1 changes, simultaneously
Vehicular charger confirmation itself is connected the most normal with battery, if normally closed S2, the voltage of test point 1 becomes again
Change.Main control module receives charging plug successful connection, and battery connects normal signal, and main control module confirms to charge, with
Time locking electromagnetism storehouse, and show on liquid crystal display screen.
4) user passes through " soft-touch type induction keyboard ", according to the information of liquid crystal display screen prompting, configures ginseng according to the situation of oneself
Number, selects automatically to be full of the one in pattern, amount of money pattern, electricity pattern, temporal mode, inputs corresponding parameter, confirm to fill
Electricity.
5), in charging process, main control module timing detection Vehicular charger charged state, when overvoltage, under-voltage, leakage occur
When electricity etc. are abnormal, charger stops energising immediately, and alarm lamp is bright, and warning message is uploaded to Charge Management services main website.
6) battery is full of complete charge or manual complete charge, the amount of money of clearing charging simultaneously, terminates this charging.Exchange is filled
Relevant information is uploaded to main website by the mode such as Ethernet or GRPS/CDMA by electricity stake.
To sum up the structure of the present invention and principle understand, and the exchange automatically compensated based on three-phase load unbalance of the present invention is filled
Electricity stake, standby power unit can effectively make charging pile normally work 24 hours, maintains the integrity of charging, reduce because of
The charging caused that has a power failure is complained, and meanwhile, when again sending a telegram here, standby power unit can be circulated charging, standby to extend
Power subsystem and on-vehicle battery life-span；Additionally it also solve original metal keyboard waterproof be connected with charging pile complete machine problem,
Charging pile man-machine interaction waterproof problem and the problem of keyboard service life；And the reactive power compensator used, make electrical network timely
Reach poised state, greatly reduce the consumption of reactive power, and reduce the high cost of conventional compensation equipment, improve simultaneously
Charge efficiency and utilization rate of electrical.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Within god and principle, any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.
Claims (8)
1. the alternating-current charging pile automatically compensated based on three-phase load unbalance, it is characterised in that include main MCU unit, and
This main MCU unit by total data line distribution connection have card reading unit, three-phase charge circuit unit, input block, display unit,
Metering units, electromagnetism warehouse receipt unit, voice guide unit, standby power unit, lightning protection electric leakage unit, communication unit, inclination angle detection
Unit, described card reading unit, charge circuit unit, input block, display unit, metering units, electromagnetism warehouse receipt unit, voice guide
Unit, standby power unit, lightning protection electric leakage unit, communication unit, inclination angle detection unit are connected with main MCU unit respectively, described
Display unit include Operation display module and equipment state display module, described three-phase charge circuit unit accesses three-phase electricity
Net, described three phase network connects has reactive power compensator, SPC cabinet to be provided with many binding posts of XA～XN, with female with each phase
Line is electrically connected with.
2. the alternating-current charging pile automatically compensated based on three-phase load unbalance as claimed in claim 1, it is characterised in that described
Reactive power compensator includes
Controller；
Signal picker, is electrically connected to the three-phase bus of electrical network, the voltage/current signals of detection three-phase bus, and communication and connects
In described controller；
IGBT drives, and is electrically connected at described controller and is driven by；
The chain links of two series connection, each chain link all includes two or more inverter circuit in parallel and end with each inverter circuit also
The DC capacitor of connection；
Three-phase bus is connected to the series circuit between two chain links by a connection line respectively, all includes string in each phase line
The reactor of connection and chopper.
3. the alternating-current charging pile automatically compensated based on three-phase load unbalance as claimed in claim 1 or 2, it is characterised in that
Reactive power compensator also includes three spark gaps, is electrically connected with the line between each described chopper and each described reactor
Road.
4. the alternating-current charging pile automatically compensated based on three-phase load unbalance as claimed in claim 1 or 2, it is characterised in that
Described controller, described IGBT driving, each described reactor and each described chain link are packaged in a SPC cabinet, form one
SPC module.
5. the alternating-current charging pile automatically compensated based on three-phase load unbalance as claimed in claim 1, it is characterised in that described
Standby power unit include the lead-acid battery of charging circuit subelement, discharge circuit subelement and 12V/5A.
6. the alternating-current charging pile automatically compensated based on three-phase load unbalance as claimed in claim 1, it is characterised in that communication
Unit includes uplink communication unit and downgoing communication unit, and described alternating-current charging pile is by uplink communication unit and background monitoring system
System carries out communication, and described alternating-current charging pile carries out communication by downgoing communication unit and Vehicular charger.
7. the alternating-current charging pile automatically compensated based on three-phase load unbalance as claimed in claim 6, it is characterised in that described
Uplink communication unit include Ethernet, GPRS/CDMA, RS232, infrared in one or more.
8. the alternating-current charging pile automatically compensated based on three-phase load unbalance as claimed in claim 6, it is characterised in that described
Downgoing communication unit include one or more between pwm signal bus, CAN, RS485.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610777127.3A CN106329686A (en) | 2016-08-31 | 2016-08-31 | AC charging pile based on three-phase load imbalance automatic compensation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610777127.3A CN106329686A (en) | 2016-08-31 | 2016-08-31 | AC charging pile based on three-phase load imbalance automatic compensation |
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| CN106329686A true CN106329686A (en) | 2017-01-11 |
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| CN201610777127.3A Pending CN106329686A (en) | 2016-08-31 | 2016-08-31 | AC charging pile based on three-phase load imbalance automatic compensation |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108461022A (en) * | 2017-02-20 | 2018-08-28 | 上海华坤电器有限公司 | A kind of power quality demo platform and its operation method |
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| CN110783926A (en) * | 2019-11-12 | 2020-02-11 | 国网四川省电力公司泸州供电公司 | Power supply system for new energy electric automobile charging pile |
| CN114069730A (en) * | 2021-11-15 | 2022-02-18 | 广东电网有限责任公司 | Reactive power coordination method and device for regional power distribution network |
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