CN109849723A - A kind of orderly charge control method of electric car based on charging station power margin - Google Patents
A kind of orderly charge control method of electric car based on charging station power margin Download PDFInfo
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- CN109849723A CN109849723A CN201910125881.2A CN201910125881A CN109849723A CN 109849723 A CN109849723 A CN 109849723A CN 201910125881 A CN201910125881 A CN 201910125881A CN 109849723 A CN109849723 A CN 109849723A
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- electric car
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/12—Electric charging stations
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- 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
Abstract
The invention discloses a kind of orderly charge control methods of the electric car based on charging station power margin, this method is according to the rated capacity of transformer in charging station and conventional load curve, obtain the charge power nargin of charging station, charging station sets different charged levels according to this power margin, and introduce tou power price mechanism, the charging cost for calculating electric car obtains optimal charging plan by genetic algorithm using average charge cost minimization as target.Orderly charge control method of the invention takes full advantage of the distribution capacity of charging station, and charge efficiency is high, convenient for executing, has combined the demand and interests of automobile user, has been conducive to improve the participation orderly to charge.
Description
Technical field
The present invention relates to electric car charge control technical field more particularly to a kind of electricity based on charging station power margin
The orderly charge control method of electrical automobile.
Background technique
A large amount of universal Fast Constructions for having pushed electrically-charging equipment of electric car.In view of the utilization rate and just of electrically-charging equipment
Benefit, most of charging pile are mounted on residential area or parking lot, occupy the transformer capacity in the region.When distribution region
When interior charging pile quantity is more, electric car charge power there may be influence, needs transformer transformer station high-voltage side bus
Rated capacity takes into account, it is ensured that transformer is to distribution region normal power supply.
Current orderly charge control method focuses primarily upon the demand response of user side, passes through electricity prices such as " time-of-use tariffs "
Mechanism, guidance electric car orderly charge.However, existing Price Mechanisms are relatively simple, it is not able to satisfy automobile user
Diverse requirements merely respond low ebb electricity price, will form new load peak, influence the safe operation of power distribution network.
Summary of the invention
Goal of the invention: in view of the above problems, the present invention proposes that a kind of electric car based on charging station power margin is orderly
Charge control method.
Technical solution: to achieve the purpose of the present invention, the present invention is based on the electric automobile charging station of charging priority is orderly
Charge control method, including following technical step:
(1) the conventional load curve under charging station transformer is obtained, according to the rated capacity of transformer, calculating each moment fills
The charge power nargin in power station；
(2) capacity for obtaining electric car, state-of-charge when inbound and it is expected that the information such as charging duration, calculate electronic
The average charge power of automobile；
(3) charged state for recording electric car in charging station, calculates the average charge power summation of all electric cars；
(4) whether out-of-limit judge charging station power, if so, electric car carries out classification charging in charging station, otherwise, own
Electric car charges normal；
(5) tou power price mechanism is introduced, the charging cost of electric car is calculated；
(6) it with the minimum target of the charging cost of electric car, is solved using genetic algorithm, obtains optimal charging plan.
Wherein, the power margin calculation formula in step (1) are as follows:
Pmar(t)=Prate-Pload(t)
Wherein, PmarIt (t) is the power margin of t period charging station, PrateFor transformer rated active power, Pload(t)
For the conventional load under t period transformer.
In step (2), the average charge rating formula of electric car are as follows:
Pav(i)=B (1-soc0(i))/tch(i)
Wherein, PavIt (i) is the average charge power of i-th electric car, B is the battery capacity of electric car, soc0(i)
Initial state-of-charge when for i-th electric car inbound, tchIt (i) is the estimated charging duration of i-th electric car.
In step (3), the summation calculation formula of mean power are as follows:
Pava(t)=∑ Pav(i)Si,t
Wherein, Pava(t) the mean power summation of all electric cars in t-th of period, S are indicatedi,tWhen indicating t-th
Between upper i-th electric car of section charged state, Si,t=1 indicates charging, Si,t=0 indicates do not charging.
In step (4), the whether out-of-limit condition of power is judged are as follows: the average charge power summation of electric car in charging station
Greater than charging station power margin.
In step (4), electric car carry out classification charging detailed process are as follows: by the estimated charging duration of electric car by
Height is ranked up on earth, and charging duration is in preceding 30% electric car, and arrangement is charged at a slow speed, charge power P2, remaining
70% electric car then charges normal, charge power P1。
Working principle: the present invention obtains charging station according to the rated capacity and conventional load curve of transformer in charging station
Charge power nargin, charging station sets different charged levels according to this power margin, and introduces tou power price mechanism, calculate
The charging cost of electric car obtains optimal charging plan by genetic algorithm using average charge cost minimization as target.
The utility model has the advantages that being made full use of the present invention is based on the orderly charge control method of the electric car of charging station power margin
The distribution capacity of charging station, charge efficiency is high, convenient for executing, it is ensured that the normal operation of distribution transformer.It considers simultaneously
The interests of automobile user are solved using average charge cost as control target using genetic algorithm, and optimal fill is obtained
Electricity plan.Orderly charge control method solution procedure of the invention is simple, has effectively taken into account automobile user and charging station
Demand is conducive to improve the participation orderly to charge.
Detailed description of the invention
Fig. 1 is that the present invention is based on the orderly charge control method flow charts of the electric car of charging station power margin；
Fig. 2 is simulation result diagram of the present invention.
Specific embodiment
Further description of the technical solution of the present invention with reference to the accompanying drawings and examples.
As shown in Figure 1, a kind of orderly charge control method of electric car based on charging station power margin includes process:
(1) the conventional load curve under charging station transformer is obtained, according to the rated capacity of transformer, calculating each moment fills
The charge power nargin in power station, calculation formula are as follows:
Pmar(t)=Prate-Pload(t) (1)
Wherein, PmarIt (t) is the power margin of t period charging station, PrateFor transformer rated active power, Pload(t)
For the conventional load under t period transformer.
And to match conventional load data convenient for analysis, it will be divided within one day 96 periods, each period interval 15min,
Then there is t=1,2,96.
(2) obtain electric car battery capacity, using on charging pile measuring device record vehicle inbound when it is charged
State and it is expected that the information such as charging duration, calculate the average charge power of electric car, calculation formula is as follows:
Pav(i)=B (1-soc0(i))/tch(i) (2)
Wherein, PavIt (i) is the average charge power of i-th electric car, B is the battery capacity of electric car, soc0(i)
Initial state-of-charge when for i-th electric car inbound, tchIt (i) is the estimated charging duration of i-th electric car.
(3) charged state for recording electric car in charging station, calculates the average charge power summation of all electric cars,
Its calculation formula is as follows:
Pava(t)=∑ Pav(i)Si,t (3)
Wherein, Pava(t) the average charge power summation of all electric cars in t-th of period, S are indicatedi,tIndicate t
The charged state of a period upper i-th electric car, Si,t=1 indicates charging, Si,t=0 indicates do not charging.
(4) whether out-of-limit judge charging station power, if in charging station electric car average charge power summation be greater than fill
Power station power margin, then electric car carries out classification charging in charging station, and otherwise, all electric cars charge normal；
Wherein, electric car carry out classification charging detailed process are as follows: by the estimated charging duration of electric car by height to
Bottom is ranked up, and charging duration is in preceding 30% electric car, and arrangement is charged at a slow speed, charge power P2, remaining 70%
Electric car then charges normal, charge power P1。
(5) " peak-to-valley-is flat " three-stage tou power price mechanism is introduced, calculates the charging cost of electric car, formula is such as
Under:
Cpay=Cpea+Cval+Cord (4)
Wherein, CpeaIndicate charging cost of the electric car in the peak period, CvalIndicate electric car in the charging of paddy period
Cost, CordIndicate electric car in the charging cost of usually section.
(6) it with the minimum objective function of the charging cost of electric car, is solved using genetic algorithm, obtains optimal chargometer
It draws.
Case is set forth below and carries out the orderly charging strategy verifying analysis of user class.Design parameter is as follows: the lithium of electric car
Battery capacity is 36kWh, and the specified charge power of charging pile is 7kW, charge efficiency 90%, and electric car quantity is taken as 20.With
Reducing user's charging cost is that objective function carries out orderly charging optimization, sets following scene: 1) scene one, electric car is unordered
Charging, charging station do not take any guidance measure 2) scene two, electric car orderly charges, and charging station introduces tou power price mechanism
It guides.Simulation result is as shown in Fig. 2, under unordered charge mode, and peak load reaches transformer capacity in charging station
1.13 times, this is because a large amount of electric car concentrates on charging at dusk, and the high overlap of peaks of the original night load of power grid exacerbates and is
System peak-valley difference.After introducing orderly charging control strategy, the total load of entire charging station is not got within transformer capacity
Boundary, for charging station, it is ensured that the stable operation of charging station.Simultaneously as can be seen that automobile user response low ebb point
When electricity price effect it is obvious, show that the orderly charging participation of user is higher.
Claims (6)
1. a kind of orderly charge control method of electric car based on charging station power margin, which is characterized in that including following step
It is rapid:
(1) the conventional load curve obtained under charging station transformer calculates each moment charging station according to the rated capacity of transformer
Charge power nargin；
(2) capacity for obtaining electric car, state-of-charge when inbound and it is expected that charging duration information, calculates electric car
Average charge power；
(3) charged state for recording electric car in charging station, calculates the average charge power summation of all electric cars；
(4) whether out-of-limit judge charging station power, if so, electric car carries out classification charging in charging station, it is otherwise, all electronic
Automobile charges normal；
(5) tou power price mechanism is introduced, the charging cost of electric car is calculated；
(6) it with the minimum target of the charging cost of electric car, is solved using genetic algorithm, obtains optimal charging plan.
2. the orderly charge control method of the electric car according to claim 1 based on charging station power margin, feature
It is, in step (1), the power margin calculation formula are as follows:
Pmar(t)=Prate-Pload(t)
Wherein, PmarIt (t) is the power margin of t period charging station, PrateFor transformer rated active power, PloadIt (t) is t
Conventional load under period transformer.
3. the orderly charge control method of the electric car according to claim 1 based on charging station power margin, feature
It is, in step (2), the average charge rating formula of the electric car are as follows:
Pav(i)=B (1-soc0(i))/tch(i)
Wherein, PavIt (i) is the average charge power of i-th electric car, B is the battery capacity of electric car, soc0It (i) is the
Initial state-of-charge when i electric car inbound, tchIt (i) is the estimated charging duration of i-th electric car.
4. the orderly charge control method of the electric car according to claim 1 based on charging station power margin, feature
It is, in step (3), the summation calculation formula of the mean power are as follows:
Pava(t)=∑ Pav(i)Si,t
Wherein, Pava(t) the mean power summation of all electric cars in t-th of period, S are indicatedi,tIndicate t-th of period
The charged state of upper i-th electric car, Si,t=1 indicates charging, Si,t=0 indicates do not charging.
5. the orderly charge control method of the electric car according to claim 1 based on charging station power margin, feature
It is, in step (4), judges the whether out-of-limit condition of power are as follows: the average charge power summation of electric car is big in charging station
In charging station power margin.
6. the orderly charge control method of the electric car according to claim 1 based on charging station power margin, feature
It is, in step (4), electric car carries out the detailed process of classification charging are as follows: by the estimated charging duration of electric car by height
It is ranked up on earth, charging duration is in preceding 30% electric car, and arrangement is charged at a slow speed, charge power P2, remaining 70%
Electric car then charge normal, charge power P1。
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| CN111210168A (en) * | 2020-02-21 | 2020-05-29 | 厦门市兆泰云智能科技有限公司 | Intelligent distribution management method for power load |
| CN111262276A (en) * | 2020-05-06 | 2020-06-09 | 深圳市永联科技股份有限公司 | Intelligent orderly charging system for alternating-current piles and method for realizing intelligent orderly charging system by using series networking |
| CN111422094A (en) * | 2020-03-11 | 2020-07-17 | 国网辽宁省电力有限公司大连供电公司 | Charge-discharge coordination optimization control method for distributed charging pile |
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| CN111799861A (en) * | 2020-07-13 | 2020-10-20 | 长沙优力电驱动系统有限公司 | Regional charge control method, device and equipment |
| CN114407716A (en) * | 2022-02-08 | 2022-04-29 | 广东省万谷能源技术有限公司 | Automatic management system and method for electric vehicle charging |
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| Publication number | Priority date | Publication date | Assignee | Title |
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