CN108988430A - A kind of charging pile system based on overall power coordinated control - Google Patents
A kind of charging pile system based on overall power coordinated control Download PDFInfo
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- CN108988430A CN108988430A CN201810892016.6A CN201810892016A CN108988430A CN 108988430 A CN108988430 A CN 108988430A CN 201810892016 A CN201810892016 A CN 201810892016A CN 108988430 A CN108988430 A CN 108988430A
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- 238000012544 monitoring process Methods 0.000 claims abstract description 22
- 238000012806 monitoring device Methods 0.000 claims abstract description 9
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- 230000036541 health Effects 0.000 description 2
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- BMZGSMUCRXYUGB-UHFFFAOYSA-N 5-chloro-2-methylaniline;hydron;chloride Chemical compound Cl.CC1=CC=C(Cl)C=C1N BMZGSMUCRXYUGB-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- H02J7/0077—
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- H02J13/0096—
-
- 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
-
- H02J7/0027—
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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
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- 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
- Y02T90/167—Systems integrating technologies related to power network operation and communication or information technologies for supporting the interoperability of electric or hybrid vehicles, i.e. smartgrids as interface for battery charging of electric vehicles [EV] or hybrid vehicles [HEV]
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S30/00—Systems supporting specific end-user applications in the sector of transportation
- Y04S30/10—Systems supporting the interoperability of electric or hybrid vehicles
- Y04S30/12—Remote or cooperative charging
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S30/00—Systems supporting specific end-user applications in the sector of transportation
- Y04S30/10—Systems supporting the interoperability of electric or hybrid vehicles
- Y04S30/14—Details associated with the interoperability, e.g. vehicle recognition, authentication, identification or billing
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
A kind of charging pile system based on overall power coordinated control, including power equipment, monitoring management work station, trade managing system, distribution network, data network, charging equipment, battery replacement device, monitoring device, wherein, control computer of standing uses overall power coordinated control to charging equipment.
Description
Technical field
The invention belongs to charging pile field, in particular to a kind of charging pile system based on overall power coordinated control.
Background technique
Charging station, which popularizes electric car, has conclusive effect, in the world the hair of electric car
The construction synchronous expansion of exhibition and electrically-charging equipment, the U.S. and some other developed country are constantly in the research of automatic station
Leading position realizes the automation and intelligence of charging station administration by intelligentized monitoring system, improves charging security
Horizontal and efficiency.It there is no the charging station monitoring system with general applicability at present.
Few to the power control techniques of charging station at this stage, charging station realizes that general power can by the administrative decision of oneself
Charging under control state, reduces influence of the charging station charging work to power grid, carries out place mat for the Large scale construction of charging station.
Summary of the invention
The technical problem to be solved by the present invention is to how coordinate the output power of charging pile system, one is provided to this present invention
Charging pile system of the kind based on overall power coordinated control,
The technical solution of the present invention is as follows: a kind of charging pile system based on overall power coordinated control, including power equipment,
Monitoring management work station, trade managing system, distribution network, data network, charging equipment, battery replacement device, monitoring device,
Power equipment includes photovoltaic apparatus, heat power station, wind power station；
Charging equipment includes direct-current charging post, alternating-current charging pile；
Distribution network packet high-voltage fence, low voltage electric network, DC bus, high voltage power distributing cabinet, distribution transformer, low-voltage distribution
Cabinet；
Data network includes Ethernet and CAN bus；
Monitoring device includes video camera, cigarette propagated sensation sensor, infrared sensor；
Monitoring management work station is connect by Ethernet with station control computer, and control computer of standing is by monitoring device to electric power
Equipment, distribution network and charging equipment are monitored,
Wherein, control computer of standing uses overall power coordinated control to charging equipment, specifically:
Before step 1, charging equipment execute power distribution, first to the power output of the charging equipment of all electric cars access
Ability is counted, and charging equipment output general power is obtained；
Step 2 reads grid power threshold value；
Step 3, charging equipment output general power are compared with grid power threshold value, are filled if grid power threshold value is greater than
Electric equipment exports general power, then distribute general power is that charging equipment exports general power, is equivalent to inactivity limitation, charging equipment
It charges in respective limit of power according to set charging strategy, if charging equipment output general power is greater than grid power
Threshold value, then assignable general power is grid power threshold value, i.e. limit value of the distribute general power no more than dispatching of power netwoks；
Step 4, each charging equipment of acquisition it is current include output power, charged state, whether there is new car to access including
Information, the distribute general power obtained in conjunction with step 3 formulates allocation strategy, the performance number of distribution is issued to each charging
Equipment；
Step 5, judge in charging station until thering is new car to be added or thering is vehicle to exit charging, if it is, re-executeing the steps
1, if it is not, then continuing step 4；
Wherein, the allocation strategy of step 4 is specially that control computer in station will be exported according to grid power threshold value and charging equipment
General power formulates allocation strategy, specifically comprises the following steps:
Step 4.1, distribute general power is read；
At the initial stage that the period is controlled at one, first acquire the limit value P of power gridXWith the charger performance number of electric car access
PJ, when executing distribution, distribution power value is Pset, Pset=min (PX,PJ)；
Step 4.2, charge power is predicted；
Calculating distribution power value PsetAfterwards, the statistical forecast of charge requirement is carried out, electric car predicts it before charging
Maximum charge power, to the electric car for being in constant-current charging phase and being newly added, prediction power is to be calculated most
Big charge power, to the charger for being in constant voltage charging phase, prediction power is current output, and statistical forecast power demand will
Foundation as power distribution；
Step 4.3, the charging time is counted；
Power distribution algorithm uses the charging time, counts to the charging time of all chargers；
Step 4.4, power distribution is carried out according to power distribution algorithm.
Wherein, the power distribution algorithm of step 4.4 specifically:
Weight is arranged according to the charging time to charger in step 4.4.1,
Table 1 charging time and weight mapping table
Step 4.4.2, primary distribution, has m platform charging equipment to be in constant-current charging phase, charge requirement is prediction
Maximum charge power has n platform charging equipment to be in constant voltage charging phase, and charge requirement is the power currently exported, then and i-th
The primary distribution power value P of electric car distributionF(i) are as follows:
Step 4.4.3, after executing the step 4.4.2 distribution, if the power distribution performance number P of electric cariIt is more than
Its maximum charge power then needs to carry out secondary distribution, by unavailable Redundant binary number amount present in primary distribution, again
Be assigned to there are also in the charger for increasing power distribution space, secondary distribution will the space that can also be promoted according to charging equipment by than
Example distribution, the increment △ P of secondary distributionM(i) as follows:
△PM(i)=PM(i)-PF(i) (PM(i)<PF(i)),
△PM(i)=0 (PM(i)=PF(i)),
Wherein, PM(i): the charger performance number of i-th electric car, the weight of β (i): the i-th electric car, β (i)
For β1、β2Or β3, PS: redundant power value.
Beneficial effects of the present invention:
(1) overall power coordinated control is limited as a kind of effective power distribution means in charging station consumption general power
In the case where system, on the one hand the same time can provide service for more users, and another aspect charge power is sharp as much as possible
With creating more economic values；
(2) overall power coordinated control guarantees that charging equipment as much as possible is in running order, reduces and waits electronic vapour
The quantity of vehicle, the relatively reasonable distribution of the power that charging station sends dispatching of power netwoks department to each charging equipment.Pass through BMS electricity
Pond administrative unit controls charging pile and is charged accordingly to battery to battery SOC, SOH and internal resistance of cell information
Operation；
(3) by BMS battery management unit to battery SOC, SOH and internal resistance of cell information, and then charging pile pair is controlled
Battery carries out corresponding charging operations；
(4) it constructs safe and reliable charging pile and shares trading environment, greatly facilitate charge user；
Detailed description of the invention
Fig. 1 is charging pile system block diagram of the invention；
Fig. 2 is overall power coordinated control flow chart of the invention；
Fig. 3 is direct-current charging post control system figure of the invention；
Fig. 4 is BMS battery management unit and charging pile connection schematic diagram of the invention；
Fig. 5 is that photovoltaic apparatus of the invention constitutes schematic diagram；
Fig. 6 is trade managing system control method flow chart of the invention；
Specific embodiment
The present invention will be further described below with reference to the drawings.
The embodiment of the present invention is with reference to shown in Fig. 1-6.
A kind of charging pile system based on overall power coordinated control, including power equipment, monitoring management work station, transaction
Management system, distribution network, data network, charging equipment, battery replacement device, monitoring device,
Power equipment includes photovoltaic apparatus, heat power station, wind power station；
Charging equipment includes direct-current charging post, alternating-current charging pile；
Distribution network packet high-voltage fence, low voltage electric network, DC bus, high voltage power distributing cabinet, distribution transformer, low-voltage distribution
Cabinet；
Data network includes Ethernet and CAN bus；
Monitoring device includes video camera, cigarette propagated sensation sensor, infrared sensor；
Monitoring management work station is connect by Ethernet with station control computer, and control computer of standing is by monitoring device to electric power
Equipment, distribution network and charging equipment are monitored,
Wherein, control computer of standing uses overall power coordinated control to charging equipment, specifically:
Before step 1, charging equipment execute power distribution, first to the power output of the charging equipment of all electric cars access
Ability is counted, and charging equipment output general power is obtained；
Step 2 reads grid power threshold value；
Step 3, charging equipment output general power are compared with grid power threshold value, are filled if grid power threshold value is greater than
Electric equipment exports general power, then distribute general power is that charging equipment exports general power, is equivalent to inactivity limitation, charging equipment
It charges in respective limit of power according to set charging strategy, if charging equipment output general power is greater than grid power
Threshold value, then assignable general power is grid power threshold value, i.e. limit value of the distribute general power no more than dispatching of power netwoks；
Step 4, each charging equipment of acquisition it is current include output power, charged state, whether there is new car to access including
Information, the distribute general power obtained in conjunction with step 3 formulates allocation strategy, the performance number of distribution is issued to each charging
Equipment；
Step 5, judge in charging station until thering is new car to be added or thering is vehicle to exit charging, if it is, re-executeing the steps
1, if it is not, then continuing step 4；
Wherein, the allocation strategy of step 4 is specially that control computer in station will be exported according to grid power threshold value and charging equipment
General power formulates allocation strategy, specifically comprises the following steps:
Step 4.1, distribute general power is read；
At the initial stage that the period is controlled at one, first acquire the limit value P of power gridXWith the charger performance number of electric car access
PJ, when executing distribution, distribution power value is Pset, Pset=min (PX,PJ)；
Step 4.2, charge power is predicted；
Calculating distribution power value PsetAfterwards, the statistical forecast of charge requirement is carried out, electric car predicts it before charging
Maximum charge power, to the electric car for being in constant-current charging phase and being newly added, prediction power is to be calculated most
Big charge power, to the charger for being in constant voltage charging phase, prediction power is current output, and statistical forecast power demand will
Foundation as power distribution；
Step 4.3, the charging time is counted；
Power distribution algorithm uses the charging time, counts to the charging time of all chargers；
Step 4.4, power distribution is carried out according to power distribution algorithm.
Wherein, the power distribution algorithm of step 4.4 specifically:
Weight is arranged according to the charging time to charger in step 4.4.1,
| Charging time | Weight |
| 0~t1 | β1 |
| t1~t2 | β2 |
| >t2 | β3 |
Table 1 charging time and weight mapping table
Step 4.4.2, primary distribution, has m platform charging equipment to be in constant-current charging phase, charge requirement is prediction
Maximum charge power has n platform charging equipment to be in constant voltage charging phase, and charge requirement is the power currently exported, then and i-th
The primary distribution power value P of electric car distributionF(i) are as follows:
Step 4.4.3, after executing the step 4.4.2 distribution, if the power distribution performance number P of electric cariIt is more than
Its maximum charge power then needs to carry out secondary distribution, by unavailable Redundant binary number amount present in primary distribution, again
Be assigned to there are also in the charger for increasing power distribution space, secondary distribution will the space that can also be promoted according to charging equipment by than
Example distribution, the increment △ P of secondary distributionM(i) as follows:
△PM(i)=PM(i)-PF(i)(PM(i)<PF(i)),
△PM(i)=0 (PM(i)=PF(i)),
Wherein, PM(i): the charger performance number of i-th electric car, the weight of β (i): the i-th electric car, β (i)
For β1、β2Or β3, PS: redundant power value,
Overall power coordinated control is confined in charging station consumption general power as a kind of effective power distribution means
In the case of, on the one hand the same time can provide service for more users, and another aspect charge power is utilized as much as possible, wound
More economic values are made, guarantee that charging equipment as much as possible is in running order, the quantity for waiting electric car is reduced, fills
The power that power station sends dispatching of power netwoks department is relatively reasonable to be distributed to each charging equipment.
The monitoring content of monitoring management work station includes:
Operating status and input to direct-current charging post and alternating-current charging pile, output parameter are monitored, operating status packet
Voltage, electric current, switch state, guard mode are included, acquisition is linked into the electric car and battery information of system, controls charging pile
Output parameter meets charge requirement,
Monitor the main power quality index of the distribution transforming access point of distribution network, including voltage deviation, frequency departure, three-phase
Uneven, harmonic voltage distortion and each harmonic containing ratio index, the abnormity early warning function of monitoring index, and can be as needed
The switching of reactive compensation and harmonic treating apparatus is carried out to improve power quality, distribution transformer input side power, voltage, electricity
Distribution transformer relay protection state, combined floodgate and load are opened in the monitoring of stream, power factor, total active energy, total capacity of idle power
Off status carries out real-time monitoring and control.
To in charging equipment or battery replacement device region and video, fire-fighting, gate inhibition, the circumference of surrounding enviroment are monitored,
Security protection system can be started at any time when station equipment is abnormal event, realize the linkage of security protection and other monitoring functions,
The operational safety of equipment in protection power station.
Direct-current charging post uses embedded system, including microcontroller, touch screen, temperature sensor, humidity sensor, IC
Card Detector, indicator light, direct current output mouth, contactor, forcibly closes switch, BMS battery management unit at ammeter,
Contactor controls the on-off of 380V alternating current input, and ammeter is connected to the output end of contactor, and microcontroller is real-time
Ammeter data is read, the electricity used is calculated, the output end of ammeter is connect with direct current output mouth, and microcontroller passes through
CAN bus to direct current output mouth sends message to control its output voltage and electric current, direct current output mouth directly with electric car
Battery case connection carries out quick charge to battery case, and battery case parameter is formed by CAN bus and reported by BMS battery management unit
Microcontroller is sent to after text.After microcontroller receives message, message is parsed, adjusts charging modes in real time, is charged
Contactor is controlled by microcontroller or is directly closed by forcibly closing switch in the process, and temperature sensor and humidity sensor are logical
Monobus mode and micro-controller communications are crossed, epidemic disaster data transmission in direct-current charging post to microcontroller is judged with this
Whether charging pile is safely operated, and IC card detector detects the IC card of user, allows user to enter system by touch screen and carries out phase
The interactive operation including charging, inquiry answered, touch screen and microcontroller are aobvious in real time by ModbusRTU protocol communication
Show the data including charging process, voltage, electric current, temperature, humidity, user information, indicator light instruction direct current stake is currently transported
Capable state.
Ammeter is fixedly mounted on inside direct-current charging post, between contactor and direct current output mouth, between cannot access
Any equipment unrelated with metering, ammeter being capable of storage time electric energy comprising metering module, main control unit, LCD show, press
Key, memory, communication module.
BMS battery management unit includes balance protection management module, management of charging and discharging module, signal conditioning circuit, gating
Holding circuit, A/D converter and master controller,
Voltage sensor, current sensor, temperature sensor, humidity sensor obtain voltage, the electric current, temperature of battery case
Signal and moisture signal, signal conditioning circuit are filtered above-mentioned signal, amplify, and remove the noise in signal, and will letter
Number it is amplified to reasonable section, there are multiple single batteries in battery case, multiple channels of multiple single batteries share an A/D and turn
Parallel operation, in analog input channel by gating holding circuit carry out channel gating, realize each channel one by one, timesharing by turn
It connects, voltage, electric current, the temperature signal input a/d converter of different monomers is selected by gating holding circuit timesharing, signal is logical
Over-sampling retainer guarantees that is sampled is the voltage, electric current, temperature signal of the same monomer same time, collected all
Information, which is stored and is transferred in master controller (DSP), is compared calculating, shows output data, while calculating as needed
Data including SOC, SOH of battery case and the internal resistance of cell out, master controller (DSP) is according to above-mentioned calculated result, to electricity
Pond case carries out charge and discharge control, and collected voltage, electric current, temperature data are transported to by master controller (DSP) by CAN bus
Charging pile controller, and according to the needs of practical charge control, corresponding analytic operation is completed in charging pile controller, is obtained
Battery case SOC, SOH and internal resistance of cell information, and then control charging pile and corresponding charging operations are carried out to battery case.
Balance protection management module is connect with master controller (DSP), carries out equalizaing charge, the step of equalizaing charge to battery case
Suddenly include:
Step 1, the voltage for checking each battery cell, when the voltage for battery cell occur be greater than the voltage reference value upper limit or
When less than voltage reference value lower limit, executes step (2) and otherwise repeat this step；
Step 2, it determines the standard deviation of the quantity of electric charge (SOC) of entire battery unit, and by the standard deviation and starts threshold value ratio
Compared with, if standard deviation is greater than starting threshold value, 3 are thened follow the steps, otherwise, execution step 1；
Step 3, according to the quantity of electric charge (SOC) of each battery cell, the transfer efficiency of the different battery cell quantities of electric charge is determined not
With the discharge and recharge that battery cell needs, and corresponding charge and discharge time, wherein the charge and discharge time=discharge and recharge/equilibrium
Electric current；
Step 4, according to the charge and discharge time of different battery cells, corresponding charge and discharge operation is carried out.
Management of charging and discharging module is connect with master controller (DSP), according to cell health state appraisal procedure to battery case into
Row health status predicts (SOH), and cell health state appraisal procedure step includes:
Step 1, battery charging and discharging model is established；
Step 2, the parameter of mesuring battary in the discharged condition is obtained；
Step 3, according to battery charging and discharging model and above-mentioned parameter, the SOH value of the mesuring battary is estimated；
Step 4, detect whether the SOH value is greater than threshold value；If the SOH value is less than the threshold value, assessment it is described to
Survey cell degradation.
BMS battery management unit real-time monitoring batteries of electric automobile group parameter, estimation mileage travelled, carries out event at estimation SOC
Barrier judgement etc., is then sent to vehicle control device or non-on-board charger by CAN bus.It is real by BMS battery management unit
When monitor batteries of electric automobile group parameter, acquisition parameter include assembled battery total voltage, monoblock battery voltage, battery pack total current and
Monoblock battery electric current；Remaining capacity estimation is carried out by BMS battery management unit, the parameter including collection voltages, electric current, estimation
State-of-charge (SOC), is sent to automobile instrument panel by CAN bus for SOC information and understands traveling state of vehicle in time for driver；
Charge and discharge control is carried out by BMS battery management unit, when the voltage or current of battery case is more than nominal parameter, BMS electricity
Pond administrative unit cuts off contactor in time, guarantees that battery pack is not damaged.
Photovoltaic apparatus includes photovoltaic array, inverter, photovoltaic conversion circuit, full-bridge converters and voltage regulator circuit, photovoltaic
Array is connect by photovoltaic conversion circuit with DC bus, is connect by inverter with low voltage electric network, the three-phase electricity of low voltage electric network
By connecting after voltage regulator circuit pressure stabilizing with DC bus, DC bus is connect by full-bridge converter with direct-current charging post, thus
It charges for electric car,
Direct current is converted to alternating current by inverter, and full-bridge converter is monofocal, push-pull type, semibridge system or full-bridge type；
Photovoltaic conversion circuit is made of Boost circuit, MOSFET driving circuit, governor circuit, signal acquisition circuit, master control
Circuit is MCU circuit, including PWM module and A/D converter, and signal acquisition circuit obtains the voltage analog of photovoltaic array output end
Signal and current analog signal obtain voltage digital signal and current digital signal by A/D converter, and governor circuit is to voltage
Digital signal and current digital signal are calculated, and determine pwm pulse duty ratio, PWM module by maximal power tracing algorithm
Output pwm pulse signal acts on the switching tube of Boost circuit after the processing of MOSFET driving circuit.
Photovoltaic array selects seven 230W polysilicon films, the output of each polysilicon films is connected, total open-circuit voltage is
DC bus-bar voltage is 400V by 259V.
Trade managing system controls the transaction of electric car and charging equipment, specific control method by data network
Are as follows:
Step 1, registration phase, trade managing system use the internet environment framework based on cloud computing, establish and are based on area
Block catenary system, all electric cars, all charging equipments and all operation commercial cities are registered on block catenary system, so that block chain
System becomes trustworthy third party, to guarantee both sides' fund security and operation payment；
Step 2, scheduling phase formulates scheduling strategy according to the policy of the demand of electric car car owner and operator；
Step 3, authentication phase, electric car and charging equipment calculate hash function using Elliptic Curve Cryptography, these
Function can not push away the safety so that it is guaranteed that password by the way that key is counter, be mutually authenticated between electric car and charging equipment, if recognized
Card is effective and is received with identities match, the then request charged；
Step 4, charging stage, electric car charge, after the completion, the information of charging equipment record transaction.
Step 1 specifically:
Step 1.1, all electric car EVs { EV1,EV2,...,EVnEach of electric car EViSelection is random
NumberAnd calculate Qi=xiP, then, each electric car EViBroadcast request (the m in block chaini,sigi(H
(mi))), wherein mi=IDi||IDj| | T, (1≤i≤n, 1≤j≤n, i ≠ j)；
Step 1.2, all charging pile CPs { CP1,CP2,...,CPlEach of charging pile CPiIt checks signature, calculates
Belong to the number of signatures α of itselfi=f (xixi+1)xi+2P is calculatedEach electric automobile charging pile CPiIn area
Broadcast request (m ' in block chaini,sigi(H(m′i))), wherein m 'i=IDi||s||Ci||T；
Step 1.3, operator O verifying signature, and calculate the shared key of user iK is broadcasted in block chaini；
Step 1.4, all electric cars in block chain, all charging equipments and all operators receive Ki, and calculate
Shared Public KeyAll charging piles have it can be seen that the key, formation are shown in block chain
Card.
Wherein,Elliptic curve codomain, Qi: the additional group of parameter of user i, P: the n rank radix of elliptic curve, mi: it is electronic
Automobile EViUser's signature, mi': charging pile CPiUser's signature, H (): hash function, sigi(): digital signature function, IDi: it uses
The identifier of family i, IDj: the identifier of user j, T: timestamp；αi: the signature value of user i, Ci: the hiding constraint of user i,The curvilinear function of user i, f (): privately owned one-way function；
Step 2 specifically: altogether there are four types of scheduling strategy, including shortest path scheduling, the shortest reach time scheduling, minimum disappear
Costly scheduling and most short waiting time,
Shortest path is scheduling to the charging of the calculating selection shortest path of the distance based on electric car to each charging pile
Stake；
The shortest reach time be scheduling to the time based on electric car to each charging pile calculating selection be most short to up to when
Between charging pile；
Minimum charge cost dispatch, which is that the calculating selection of the consumer cost based on electric car to each charging pile is minimum, to disappear
The charging pile taken；
The most short waiting time is scheduling to select most based on the calculating for calculating electric car waiting time before each charging pile
The charging pile of short waiting time；
The electric car EV for needing to chargeQIn summary four kinds of scheduling select optimal charging pile CPG,
Step 3 specifically:
Step 3.1, electric car EVQBy its identity IDEVIt is sent to charging pile CPG, charging pile CPGCollect matched block
Charge request is simultaneously returned to EV by chain informationQ；
Step 3.2, electric car EVQSend message { IDCP,QCP,PCP,HCP, K } and give charging pile CPG；
Step 3.3, charging pile CPGAccording to time stamp TiSelect random numberIt calculates HtEV=H2(IDEV,PIDEV,QEV,TEV), SKEV=b+ ε HtEV, then, send message { PIDEV,QEV,TEV,
SKEVGive electric car EVQ；
Step 3.4, electric car EVQSelect random numberCalculate REV=cP, HEV=H3(IDCP,PIDEV,QEV,
REV,TEV), ξEV=SKtEV+cEVHEV, then, message { ID is sent by exit passagewayCP,PIDEV,QEV,REV,TEV,ξEVFilled
Electric stake CPG
Step 3.5, charging pile CPGReceive message { IDCP,PIDEV,QEV,REV,TEV,ξEV, H is calculated againtEV=H2
(IDEV,PIDEV,QEV,TEV), HEV=H3(IDCP,PIDEV,QEV,REV,TEV), it is based on ξEVP=QEV+HEVPpub+HEVREV, verifying connects
The signature received；If signature failure, charging pile CPGEnding request, otherwise, charging pile CPGElectric car EV is calculatedQCard
Real identity, charging pile CPGSelect random numberCalculate RCP=dP, SK=H4(dEEV,IDCP,PIDEV,QEV,TEV), HCP=
H5(IDCP,RIDCP,QEV,SK,dREV), ξCP=εCP+dHCP, then, send message { IDEV,PIDEV,RCP,ξCPGive electric car
EVQ；
Step 3.6, electric car EVQReceive information { IDEV,PIDEV,RCP,ξCP, SK value is calculated again, and signature is carried out
Verifying, SK=H4(cRCP,IDCP,RIDEV,QEV,TEV), HCP=H5(RIDEV,IDCP,QEV,SK,dRCP), it is based on ξCPP=QCP+
HCPPpub+HCPRCP, signature is verified；If the verification passes, then certification terminate, by key SK realize encryption message with into
Row secure communication；Otherwise, electric car EVQEnding request；
Step 4 specifically:
Step 4.1, electric car EVQIt calculates and hides constraint C=H5(IDEV,RCP,ξCPP)；
Step 4.2, charging pile CPGVerifying hide constraint, then determine current time whether with electric car EVQIt is initial
It is recommended that time range matches；
Step 4.3, after being verified, electric car EVQWith charging pile CPGBetween charge according to the matched time,
During this, block chain does not have information publication, discloses without third party's information yet.
Wherein, IDCP: charging pile CPGIdentifier, IDEV: electric car EVQIdentifier, RIDEV: electric car EVQIt is original
Identifier, PIDEV: electric car EVQPseudo- identifier, QCP: charging pile CPGAdditional group of parameter, QEV: electric car EVQIt is attached
Add a group parameter, PCP: charging pile CPGThe n rank radix of elliptic curve, Ppub: share the n rank radix of elliptic curve, HCP: charging pile CPG
Cryptographic Hash, HEV: electric car EVQCryptographic Hash, b: random number, HtEV: electric car EVQT moment cryptographic Hash, REV: electric car
EVQAuthorization password, TEV: electric car EVQTimestamp, SK: share Transient Key, SKEV: electric car EVQIt is temporary close
Key, ε: linear dimensions, ξEV: electric car EVQArithmetic signature, ξCP: charging pile CPGArithmetic signature, H1()、H2()、H3
()、H4()、H5() is privately owned hash function.
By block chain technical application to charging pile field, so that the safe and reliable charging pile of building shares trading environment,
Charge user will greatly be facilitated, improve the utilization rate of charging pile, effectively prevent the malicious act of data tampering and revocation, really
It has protected system to be under proprietary supervision, anyone can not be tryed to gain by addition malicious code or using system vulnerability
Interests.
Embodiment described above only expresses one embodiment of the present invention, and but it cannot be understood as to this
The limitation of invention scope.It should be pointed out that for those of ordinary skill in the art, in the premise for not departing from present inventive concept
Under, various modifications and improvements can be made, and these are all within the scope of protection of the present invention.
Claims (10)
1. a kind of charging pile system based on overall power coordinated control, including power equipment, monitoring management work station, transaction pipe
Reason system, distribution network, data network, charging equipment, battery replacement device, monitoring device,
Power equipment includes photovoltaic apparatus, heat power station, wind power station；
Charging equipment includes direct-current charging post, alternating-current charging pile；
Distribution network packet high-voltage fence, low voltage electric network, DC bus, high voltage power distributing cabinet, distribution transformer, low-voltage distribution cabinet；
Data network includes Ethernet and CAN bus；
Monitoring management work station is connect by Ethernet with station control computer, and control computer of standing sets electric power by monitoring device
Standby, distribution network and charging equipment are monitored,
Wherein, control computer of standing uses overall power coordinated control to charging equipment, specifically:
Step 1, before charging equipment executes power distribution, first to the power output capacity of the charging equipment of all electric cars access
It is counted, obtains charging equipment output general power；
Step 2, grid power threshold value is read；
Step 3, charging equipment output general power is compared with grid power threshold value, if grid power threshold value is greater than charging and sets
Standby output general power, then distribute general power is that charging equipment exports general power, is equivalent to inactivity limitation, charging equipment is each
From limit of power in charge according to set charging strategy, if charging equipment output general power is greater than grid power threshold
Value, then assignable general power is grid power threshold value, and distribute general power is no more than the limit value of dispatching of power netwoks；
Step 4, acquire each charging equipment it is current include output power, charged state, whether there is new car to access including letter
Breath, the distribute general power obtained in conjunction with step 3 formulate allocation strategy, the performance number of distribution are issued to each charging and is set
It is standby；
Step 5, judge in charging station until thering is new car to be added or thering is vehicle to exit charging, if it is, re-executeing the steps 1, such as
Fruit is no, then continues step 4.
2. a kind of charging pile system based on overall power coordinated control according to claim 1, it is characterised in that step 4
Allocation strategy be specially stand control computer will according to grid power threshold value and charging equipment output general power formulate allocation strategy,
Specifically comprise the following steps:
Step 4.1, distribute general power is read；
At the initial stage that the period is controlled at one, first acquire the limit value P of power gridXWith the charger performance number P of electric car accessJ,
When executing distribution, distribution power value is Pset, Pset=min (PX,PJ)；
Step 4.2, charge power is predicted；
Calculating distribution power value PsetAfterwards, the statistical forecast of charge requirement is carried out, electric car predicts its maximum before charging
Charge power, to the electric car for being in constant-current charging phase and being newly added, prediction power is that the maximum being calculated is filled
Electrical power, to the charger for being in constant voltage charging phase, prediction power is current output, and statistical forecast power demand is by conduct
The foundation of power distribution；
Step 4.3, the charging time is counted；
Power distribution algorithm uses the charging time, counts to the charging time of all chargers；
Step 4.4, power distribution is carried out according to power distribution algorithm.
3. a kind of charging pile system based on overall power coordinated control according to claim 2, it is characterised in that step
4.4 power distribution algorithm specifically:
Weight is arranged to the charging time of charger according to charging time and weight mapping table in step 4.4.1,
Step 4.4.2, primary distribution, has m platform charging equipment to be in constant-current charging phase, charge requirement is the maximum of prediction
Charge power has n platform charging equipment to be in constant voltage charging phase, and charge requirement is the power currently exported, then i-th it is electronic
The primary distribution power value P of automobile distributionF(i) are as follows:
Step 4.4.3, after executing the step 4.4.2 distribution, if the power distribution performance number P of electric cariMore than its maximum
Charge power then needs to carry out secondary distribution, and unavailable Redundant binary number amount present in primary distribution is assigned to again
There are also in the charger for increasing power distribution space, secondary distribution divides in the space that can be also promoted according to charging equipment in proportion
Match, the increment △ P of secondary distributionM(i) as follows:
△PM(i)=PM(i)-PF(i)(PM(i)<PF(i)),
△PM(i)=0 (PM(i)=PF(i)),
Wherein, PM(i): the charger performance number of i-th electric car, the weight of β (i): the i-th electric car, β (i) are β1、
β2Or β3, PS: redundant power value.
4. a kind of charging pile system based on overall power coordinated control according to claim 1, it is characterised in that monitoring
The monitoring content of management work station includes:
Operating status and input to direct-current charging post and alternating-current charging pile, output parameter are monitored, and operating status includes electricity
Pressure, electric current, switch state, guard mode, acquisition are linked into the electric car and battery information of system, control the output of charging pile
Parameter meets charge requirement,
Monitor the main power quality index of the distribution transforming access point of distribution network, including voltage deviation, frequency departure, three-phase injustice
Weighing apparatus, harmonic voltage distortion and each harmonic containing ratio index, the abnormity early warning function of monitoring index, and can carry out as needed
The switching of reactive compensation and harmonic treating apparatus improves power quality, distribution transformer input side power, voltage, electric current, function
The monitoring of rate factor, total active energy, total capacity of idle power, to distribution transformer relay protection state, combined floodgate and on-load switch shape
State carries out real-time monitoring and control；
To in charging equipment or battery replacement device region and video, fire-fighting, gate inhibition, the circumference of surrounding enviroment are monitored, work as station
Interior equipment can start security protection system at any time when being abnormal event, realize the linkage of security protection and other monitoring functions, ensure
The operational safety of electric station equipment.
5. a kind of charging pile system based on overall power coordinated control according to claim 1, it is characterised in that: direct current
Charging pile uses embedded system, including microcontroller, touch screen, temperature sensor, humidity sensor, IC card detector, electricity
Table, direct current output mouth, contactor, forcibly closes switch, BMS battery management unit at indicator light.
6. a kind of charging pile system based on overall power coordinated control according to claim 5, it is characterised in that:
Contactor controls the on-off of 380V alternating current input, and ammeter is connected to the output end of contactor, and microcontroller is read in real time
Ammeter data calculates the electricity used, and the output end of ammeter is connect with direct current output mouth, and microcontroller is total by CAN
Line to direct current output mouth sends message to control its output voltage and electric current, direct current output mouth directly with the battery case of electric car
Connection carries out quick charge to battery case, and BMS battery management unit is sent out after battery case parameter is formed message by CAN bus
It send to microcontroller.After microcontroller receives message, message is parsed, adjusts charging modes in real time, in charging process
Contactor is controlled by microcontroller or by forcibly closing switch directly closing, and temperature sensor and humidity sensor pass through single total
Epidemic disaster data transmission in direct-current charging post to microcontroller is judged charging pile with this by line mode and micro-controller communications
Whether it is safely operated, IC card detector detects the IC card of user, allows user to enter system by touch screen and is wrapped accordingly
The interactive operation including charging, inquiry, touch screen and microcontroller are included by ModbusRTU protocol communication, real-time display includes
Data including charging process, voltage, electric current, temperature, humidity, user information, indicator light indicate the currently running shape of direct current stake
State.
7. a kind of charging pile system based on overall power coordinated control according to claim 1, it is characterised in that: photovoltaic
Equipment includes that photovoltaic array, inverter, photovoltaic conversion circuit, full-bridge converters and voltage regulator circuit, photovoltaic array pass through photovoltaic
Conversion circuit is connect with DC bus, is connect by inverter with low voltage electric network, the three-phase electricity of low voltage electric network passes through voltage regulator circuit
Connect after pressure stabilizing with DC bus, DC bus is connect by full-bridge converter with direct-current charging post, thus be electric car into
Direct current is converted to alternating current by row charging, inverter, and full-bridge converter is monofocal, push-pull type, semibridge system or full-bridge type.
8. a kind of charging pile system based on overall power coordinated control according to claim 7, it is characterised in that: photovoltaic
Conversion circuit is made of Boost circuit, MOSFET driving circuit, governor circuit, signal acquisition circuit, and governor circuit is MCU electricity
Road, including PWM module and A/D converter, signal acquisition circuit obtain the voltage analog signal and electric current of photovoltaic array output end
Analog signal obtains voltage digital signal and current digital signal by A/D converter, governor circuit to voltage digital signal and
Current digital signal is calculated, and determines that pwm pulse duty ratio, PWM module export pwm pulse by maximal power tracing algorithm
Signal acts on the switching tube of Boost circuit after the processing of MOSFET driving circuit；Photovoltaic array selects seven 230W polycrystalline
Silicon plate connects the output of each polysilicon films, and total open-circuit voltage is 259V, is 400V by DC bus-bar voltage.
9. a kind of charging pile system based on overall power coordinated control according to claim 1, it is characterised in that: transaction
Management system controls the transaction of electric car and charging equipment, specific control method by data network are as follows:
Step 1, registration phase, trade managing system use the internet environment framework based on cloud computing, establish and are based on block chain
System, all electric cars, all charging equipments and all operation commercial cities are registered on block catenary system, so that block catenary system
As trustworthy third party, to guarantee both sides' fund security and operation payment；
Step 2, scheduling phase formulates scheduling strategy according to the policy of the demand of electric car car owner and operator；
Step 3, authentication phase, electric car and charging equipment calculate hash function, these functions using Elliptic Curve Cryptography
The safety so that it is guaranteed that password can not be pushed away by the way that key is counter, be mutually authenticated between electric car and charging equipment, if certification is
Received effectively and with identities match, the then request charged；
Step 4, charging stage, electric car charge, after the completion, the information of charging equipment record transaction.
10. a kind of charging pile system based on overall power coordinated control according to claim 9, it is characterised in that step
2 specifically: altogether there are four types of scheduling strategy, including shortest path scheduling, the shortest reach time scheduling, minimum charge cost dispatch and
The most short waiting time,
Shortest path is scheduling to the charging pile of the calculating selection shortest path of the distance based on electric car to each charging pile；
The shortest reach time is scheduling to the calculating selection the shortest reach time of the time based on electric car to each charging pile
Charging pile；
Minimum charge cost dispatch is the calculating selection minimum charge of the consumer cost based on electric car to each charging pile
Charging pile；
The most short waiting time is scheduling to most short etc. based on the calculating selection for calculating electric car waiting time before each charging pile
Charging pile to the time；
The electric car EV for needing to chargeQIn summary four kinds of scheduling select optimal charging pile CPG。
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| CN109768562A (en) * | 2019-01-17 | 2019-05-17 | 南京理工大学 | A kind of electric automobile charging station power coordination control method |
| CN109857030A (en) * | 2019-02-22 | 2019-06-07 | 上海韧思能源科技有限公司 | A kind of charging pile station grade indigenous energy controller |
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| CN109768562A (en) * | 2019-01-17 | 2019-05-17 | 南京理工大学 | A kind of electric automobile charging station power coordination control method |
| CN109857030A (en) * | 2019-02-22 | 2019-06-07 | 上海韧思能源科技有限公司 | A kind of charging pile station grade indigenous energy controller |
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| CN110635536A (en) * | 2019-10-14 | 2019-12-31 | 李金生 | Energy control device and method based on Internet of things |
| CN110901455A (en) * | 2019-11-11 | 2020-03-24 | 恒大智慧充电科技有限公司 | Charging method, system, computer equipment and computer readable storage medium |
| CN110782591A (en) * | 2019-12-31 | 2020-02-11 | 汇网电气有限公司 | Charging gun linkage complementary method of multi-head charging pile |
| CN112550053A (en) * | 2020-12-18 | 2021-03-26 | 山东鲁昂电气有限公司 | Charging pile control method based on tunnel encryption technology |
| TWI785513B (en) * | 2021-02-26 | 2022-12-01 | 拓連科技股份有限公司 | Electric vehicle charging management methods and systems with variable energy management solution |
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