CN109353245B - Automatic distribution method for charging cluster power of electric automobile - Google Patents

Automatic distribution method for charging cluster power of electric automobile Download PDF

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CN109353245B
CN109353245B CN201811272928.XA CN201811272928A CN109353245B CN 109353245 B CN109353245 B CN 109353245B CN 201811272928 A CN201811272928 A CN 201811272928A CN 109353245 B CN109353245 B CN 109353245B
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CN109353245A (en
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洪高英
段林涛
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Henan Yingkai Electric Co ltd
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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
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    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/12—Electric charging stations

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Abstract

The invention belongs to the technical field of electric automobile charging, and provides an automatic distribution method of electric automobile charging cluster power. The charging cluster comprises a cluster control system, an information transmission network, an intelligent charging pile and an automatic power distribution system. The invention comprises the following main steps: monitoring the charging power of the intelligent charging pile to which the charging cluster belongs; dynamically dividing charging areas in the cluster, and allocating area power in real time according to the principle of preferentially ensuring the rapid charging requirement; when the charging power of the slow charging area is insufficient, the time for the intelligent charging pile of the slow charging area to start charging is set according to the charging requirement of the electric automobile, and the power distribution of the charging cluster is further adjusted and optimized. According to the invention, the power of the charging cluster is distributed in real time, so that the problems of low charging speed and low working efficiency of the charging cluster when the power limit of the charging cluster is reduced in a peak period of power utilization are solved.

Description

Automatic distribution method for charging cluster power of electric automobile
Technical Field
The invention belongs to the technical field of electric automobile charging, and particularly relates to an automatic distribution method for electric automobile charging cluster power.
Background
With the increasingly excited contradiction between economic development and energy supply and environmental pollution, the problems of energy conservation, consumption reduction and reduction of dependence on fossil fuels become urgent needs to be solved in the continuous economic development of countries in the world. The electric automobile has the advantages of oil saving, environmental protection and high efficiency, and scientists and industries in various countries in the world generally consider the electric automobile to be an important clean vehicle in twenty-first century. Electric vehicle charging stations and charging networks are important infrastructures for large-scale and industrial development of electric vehicles.
The problem that the available load power of a charging station is reduced can occur in a large-scale charging station in the peak period of power utilization, and when a large number of charging vehicles need to enter the charging station for charging, the power is often not distributed enough, so that the charging piles which start to work at the back need to queue up to wait for the charging piles which work at the front. Especially at night, in the peak period of electricity consumption of residents, the available load power of the charging station is possibly smaller than the rated power of the charging station, the charging station is often stopped with vehicles to be charged, and a large number of charging piles of the charging station are in an idle state, so that resource waste is caused. In fact, the charging demands of different charging vehicles are different, for example, the remaining charge of the vehicle entering the charging station is different, the vehicle-taking time of the owner is different, and the charging power demands of the vehicles in different charging phases are different from the charging process, and when the vehicle-mounted battery pack is nearly full, the charging demand power is reduced to about one fifth of the rated capacity of the battery.
The main reasons for this problem are two: first, although a single intelligent charging pile can adjust charging voltage according to the charging requirement of an electric vehicle at present, the power scheduling rule of a charging station follows the principle of first come first serve and schedules according to the sequence of the electric vehicles, when an idle charging pile exists, a vehicle comes to start working, and the charging time and the charging power are not flexibly distributed according to the overall vehicle charging requirement of the charging station. Secondly, the operation management of the current charging station mainly depends on manual scheduling, the experience and the responsibility of scheduling personnel can influence the scheduling effect, and when the number of vehicles is large, the vehicles work for a long time in a fatigue way, scheduling errors are easy to occur, and the waste of charging resources is caused.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a method for automatically distributing charging power of a large-scale charging station, which can distribute power in real time in the charging station according to the charging power demand condition of the charging station, balance the charging demand of an electric vehicle and improve the charging efficiency and the utilization rate of charging equipment.
In order to solve the problems, the invention provides an automatic distribution method of electric vehicle charging cluster power. The electric vehicle charging cluster comprises a cluster control system, an intelligent charging pile, an area power supply network and an automatic power distribution system which are connected through an information transmission network, and the cluster control system is used for uniformly managing, monitoring and coordinately controlling the work of equipment to which the cluster belongs.
The charging cluster distributes the charging power of the cluster according to the following power distribution method:
A. the charging cluster is divided into a fast charging area and a slow charging area, and the full power distribution limit P is given to the fast charging area according to the preset proportion of the systemkzAllocating charging power amount P to slow charging areamz，Pz＝Pkz+Pmz，PzA total charge power limit for the cluster;
B. dividing m intelligent charging piles which are being rapidly charged into a rapid charging area, dividing n intelligent charging piles which are being slowly charged into a slow charging area, and sequentially collecting the current required charging power of the intelligent charging piles in the rapid charging area and the slow charging area;
C. calculating the total required charging power of the fast charging area
Figure BDA0001845208920000021
And total required charging power of slow charging area
Figure BDA0001845208920000022
Wherein P ismiIs the current required charging power, P, of the ith slow charging intelligent charging pilekiThe current required charging power of the ith intelligent charging pile which is being rapidly charged;
D. if it is not
Figure BDA0001845208920000023
Returning to the step B;
E. if it is not
Figure BDA0001845208920000024
Then allocating the power amount P allocated to the fast charging areakzAdjust to Pk′z＝PzAnd stopping work in a slow charging area, reducing the load of the charging pile in a fast charging area according to a proportion, and reducing the output power to the original output power
Figure BDA0001845208920000025
Turning to the step B;
F. if it is not
Figure BDA0001845208920000031
Then allocating the power amount P allocated to the fast charging areakzIs adjusted to
Figure BDA0001845208920000032
The charging pile in the fast charging area works at full load, and the power amount distributed to the slow charging area is changed into Pm′z＝Pz-Pk′zTurning to the step H;
G. if it is not
Figure BDA0001845208920000033
Then allocating the power amount P allocated to the fast charging areakzIs adjusted to
Figure BDA0001845208920000034
The charging pile in the fast charging area still works at full load, and the power amount distributed to the slow charging area is changed into Pm′z＝Pz-Pk′z；
H. If it is not
Figure BDA0001845208920000035
B, turning to the step B when the charging pile in the slow charging area works at full load;
I. uploading the vehicle taking time, the required charging power and the vehicle residual capacity of a vehicle owner by the intelligent charging pile in the slow charging area, calculating to obtain the required charging time, setting the working time of the intelligent charging pile, and starting the intelligent charging pile after the set time is reached;
J. calculating the total required charging power of the slow charging area
Figure BDA0001845208920000036
K. If it is not
Figure BDA0001845208920000037
B, the charging pile in the slow charging area works at full load, and the step B is returned; otherwise according to Pm′zAnd
Figure BDA0001845208920000038
the ratio of the output power to the output power is reduced to the original value
Figure BDA0001845208920000039
And returning to the step B.
Further, in the step I, the vehicle taking time of the vehicle owner is set by the vehicle owner in the intelligent charging pile.
Further, in step I, the remaining capacity and the required charging power of the vehicle are acquired by the intelligent charging pile from the BMS system of the vehicle.
Furthermore, the intelligent charging pile is connected with a BMS system of the electric automobile by using the can bus, and charging information provided by the BMS is acquired.
The method for automatically distributing the power of the electric vehicle charging cluster comprises the steps of monitoring the charging power of an intelligent charging pile to which the cluster belongs; dynamically dividing charging areas in the cluster, and allocating area power in real time according to the principle of preferentially ensuring the rapid charging requirement; when the charging power of the slow charging area is insufficient, the time for the intelligent charging pile of the slow charging area to start charging is set according to the charging requirement of the electric automobile, the power distribution of the charging cluster is further adjusted and optimized, and the problems that the charging speed of the charging cluster is reduced and the working efficiency is low when the power of the charging cluster is reduced in the power utilization peak period are solved.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an electric vehicle charging cluster based on an automatic power distribution technology in an embodiment of the present invention;
fig. 2 is a flowchart of an electric vehicle charging cluster power automatic allocation method in an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
The electric vehicle charging cluster provided by the embodiment is shown in fig. 1, wherein a connecting line in the figure represents an information transmission network, and a power supply network is omitted in the figure. The charging cluster comprises a cluster control system, an information transmission network, an intelligent charging pile, a power supply network and an automatic power distribution system. After the external power enters the charging cluster, the intelligent charging pile is powered through a power supply network. The intelligent charging pile used by the electric automobile charging cluster is provided with quick and slow charging connectors, the charging connectors are connected to a charging network in a parallel connection mode, a vehicle owner can select one of the charging connectors to charge the electric automobile, and one charging pile can meet the charging requirements of a plurality of electric automobiles simultaneously. The automatic power distribution system adjusts the output power of the charging connector to realize the adjustment of the power supply power of the fast charging area and the slow charging area, and when the power limit of the charging cluster is not changed, the fast charging area increases 100KW power, and the slow charging area correspondingly reduces 100KW power.
The cluster control system comprises a data acquisition module, a communication module and an information processing and control module. The data acquisition module is used for acquiring the working state information of the equipment to which the charging cluster belongs; the communication module is used for exchanging data with other affiliated equipment of the charging cluster in real time, converting and arranging data information formats and outputting the data information formats to the data acquisition module; and the information processing and control module is used for processing the data output by the data acquisition module, generating a control instruction, coordinating and controlling the work of the equipment of the charging cluster, controlling the charging time of the intelligent charging pile according to the power allocation method shown in fig. 2, and optimizing the charging power distribution of the slow charging area.
And the automatic power distribution system is used for responding to the instruction of the cluster control system, monitoring the power distribution and the use condition of the whole charging cluster in real time, carrying out regional management on the power of the charging cluster, and distributing the input power of a quick charging area and a slow charging area in the charging cluster by adjusting the output power of the charging connector.
The intelligent charging pile is connected with a BMS system of an automobile by using a can bus, and further comprises a user operation panel, a power supply module, a communication module and a monitoring and control module. By utilizing the user operation panel, a vehicle owner can set vehicle taking time in the intelligent charging pile so as to finish operations such as card swiping payment and the like; and the central processing module is used for controlling and coordinating the work of the charging pile, performing information interaction with the cluster control system through the communication module and responding to the instruction of the cluster control system. The monitoring and control module monitors vehicle charging information including required charging power, residual electric quantity and the like provided by the BMS in real time, and sends a voltage regulation instruction to the power supply module according to the power supply condition and the vehicle charging condition of the current area to adjust the charging voltage; and the power supply module is connected with a power supply area network, executes the instruction of the automatic power distribution system, corrects the voltage regulation instruction sent by the power supply module, and adjusts the output power of the charging connector.
The information transmission network comprises a router and an optical fiber Ethernet and is used for connecting the cluster control system, the automatic power distribution system and the intelligent charging pile, so that the cluster control system can control the intelligent charging pile, set parameters and inquire data, and meanwhile, the charging pile can upload the working information of the charging pile in real time through a network interface.
After the charging cluster starts to work, the power is automatically distributed according to the flow shown in fig. 2, and the specific steps are as follows:
A. the automatic power distribution system sets the charging power limit of the quick charging area to be P according to the preset proportion of the systemkzSetting the charging power limit of the slow charging area as Pmz，Pz＝Pkz+Pmz，PzThe charge power credit for the cluster.
B. The automatic power distribution system divides m intelligent charging piles which are in rapid charging into a rapid charging area, and divides n intelligent charging piles which are in slow charging into a slow charging area.
C. Real-time monitoring required charging power P of ith intelligent charging pile performing quick chargingkiAnd the station of the ith intelligent charging pile which is in slow chargingPower P to be chargedmi。
D. Calculating the charging power required by the slow charging area
Figure BDA0001845208920000061
And charging power required by fast charging area
Figure BDA0001845208920000062
E. If it is not
Figure BDA0001845208920000063
And is
Figure BDA0001845208920000064
Then return to step B.
F. If it is not
Figure BDA0001845208920000065
Then the power limit P of the fast charging area is calculatedkzAdjust to Pk′z＝PzWhen the slow charging area stops supplying power, the automatic power distribution system adjusts the output power of the charging connector of the fast charging area to the original output power
Figure BDA0001845208920000066
Turning to the step B;
G. if it is not
Figure BDA0001845208920000067
Then the power limit P of the fast charging area is calculatedkzIs adjusted to
Figure BDA0001845208920000068
The full-load work of the charging pile in the fast charging area is realized, and the power limit of the slow charging area is changed into Pm′z＝Pz-Pk′zGo to step I.
H. If it is not
Figure BDA0001845208920000069
While
Figure BDA00018452089200000610
Then the power limit P of the fast charging area is calculatedkzIs adjusted to
Figure BDA00018452089200000611
The charging pile in the fast charging area works at full load, and the power limit of the slow charging area is changed into Pm′z＝Pz-Pk′z。
I. If it is not
Figure BDA00018452089200000612
And C, the charging pile in the slow charging area works at full load, and the step B is carried out.
J. The automatic power distribution system calculates the required charging time according to the vehicle taking time, the required charging power and the vehicle residual capacity of the vehicle owner uploaded by the intelligent charging pile in the slow charging area, sets the working time of the intelligent charging pile, and starts to work only after the set time is reached;
l, calculating the total required charging power of the slow charging area
Figure BDA00018452089200000613
M, if
Figure BDA0001845208920000071
B, the charging pile in the slow charging area works at full load, and the step B is returned; otherwise, the intelligent charging pile in the slow charging area reduces the load according to the proportion and works, and the output power is reduced to the original power
Figure BDA0001845208920000072
And returning to the step B.
The automatic power distribution system monitors the charging power of the charging cluster in real time, dynamically adjusts the charge power limit of a fast charging area and a slow charging area, and preferentially arranges the fast charging requirement, and the cluster control system reasonably arranges the charging time of a slow charging pile under the condition that the power of the slow charging area cannot meet the charging requirement, and automatically distributes the power in the cluster, thereby achieving the purpose of improving the utilization rate and the charging efficiency of charging cluster equipment.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (4)

1. An automatic distribution method for charging cluster power of an electric automobile is characterized by comprising the following steps:
A. the charging cluster is divided into a fast charging area and a slow charging area, and the electric power amount P is distributed to the fast charging area according to the preset proportion of the systemkzAllocating charging power amount P to slow charging areamz，Pz＝Pkz+Pmz，PzA total charge power limit for the cluster;
B. dividing m intelligent charging piles which are being rapidly charged into a rapid charging area, dividing n intelligent charging piles which are being slowly charged into a slow charging area, and sequentially collecting the current required charging power of the intelligent charging piles in the rapid charging area and the slow charging area;
C. calculating the total required charging power of the fast charging area
Figure FDA0003110675140000011
And total required charging power of slow charging area
Figure FDA0003110675140000012
Wherein P ismiIs the slow charging power, P, currently required by the ith slow charging intelligent charging pilekiThe current required quick charging power of the ith quick charging intelligent charging pile is obtained;
D. if it is not
Figure FDA0003110675140000013
And is
Figure FDA0003110675140000014
Returning to the step B;
E. if it is not
Figure FDA0003110675140000015
Then allocating the power amount P allocated to the fast charging areakzAdjusted to P'kz＝PzAnd stopping work in a slow charging area, reducing the load of the charging pile in a fast charging area according to a proportion, and reducing the output power to the original output power
Figure FDA0003110675140000016
Turning to the step B;
F. if it is not
Figure FDA0003110675140000017
Then allocating the power amount P allocated to the fast charging areakzIs adjusted to
Figure FDA0003110675140000018
The charging pile of the quick charging area works at full load, and the power amount distributed to the slow charging area is adjusted to be P'mz＝Pz-P′kzTurning to the step H;
G. if it is not
Figure FDA0003110675140000019
Figure FDA00031106751400000110
Then allocating the power amount P allocated to the fast charging areakzIs adjusted to
Figure FDA00031106751400000111
The charging pile of the fast charging area still works at full load, and the power amount distributed to the slow charging area is adjusted to be P'mz＝Pz-P′kz；
H. If it is not
Figure FDA0003110675140000021
B, turning to the step B when the charging pile in the slow charging area works at full load;
I. uploading the vehicle taking time, the required charging power and the vehicle residual capacity of a vehicle owner by the intelligent charging pile in the slow charging area, calculating to obtain the required charging time, setting the working time of the intelligent charging pile, and starting the intelligent charging pile after the set time is reached;
J. calculating the total required charging power of the slow charging area
Figure FDA0003110675140000022
K. If it is not
Figure FDA0003110675140000023
B, the charging pile in the slow charging area works at full load, and the step B is returned; otherwise according to P'mzAnd
Figure FDA0003110675140000024
the ratio of the load to the load of the intelligent charging pile in the slow charging area is reduced proportionally, and the output power is reduced to the original output power
Figure FDA0003110675140000025
And returning to the step B.
2. The method according to claim 1, wherein in step I, the car-taking time of the car owner is set by the car owner in the intelligent charging pile.
3. The method of claim 1, wherein in step I, the remaining amount of power and the required charging power of the vehicle are obtained by the intelligent charging pile from a BMS system of the vehicle.
4. The method of claim 1, wherein the intelligent charging pile is connected to a BMS system of the electric vehicle using a can bus to obtain charging information provided by the BMS.
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