CN113060039B - Two-stage safety control small direct current charging regulation and control method and system - Google Patents
Two-stage safety control small direct current charging regulation and control method and system Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/60—Monitoring or controlling charging stations
- B60L53/62—Monitoring or controlling charging stations in response to charging parameters, e.g. current, voltage or electrical charge
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/60—Monitoring or controlling charging stations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/60—Monitoring or controlling charging stations
- B60L53/63—Monitoring or controlling charging stations in response to network capacity
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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
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
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Abstract
The invention provides a small direct current charging regulation and control method and a system thereof for two-stage safety control, which comprises the following steps: s1, a load acquisition layer acquires the service condition information of the electric load of the transformer and acquires the charging load demand information of each vehicle; s2, the load control layer receives the transformer power utilization load use condition information and the vehicle charging load demand information which are acquired by the load acquisition layer; s3, the load control layer calculates the available load of the transformer through the charging cloud platform, matches a charging strategy by combining the charging demand information of each vehicle, and dynamically schedules the charging power of each vehicle; s4, the terminal output layer executes a charging strategy of the load control layer and outputs the distributed charging power to the charging vehicles in order; and S5, monitoring the load use conditions of the transformer and the charging vehicle in real time by the charging cloud platform. The invention solves the problems that the utilization rate of power supply equipment is reduced and the stable and economic operation of a power grid is not facilitated due to the fact that the daily power utilization of charging equipment and residents is robbed for loads at present.
Description
Technical Field
The invention relates to the technical field of direct current charging and the technical field of electric vehicle charging, in particular to a small direct current charging regulation and control method and a small direct current charging regulation and control system with two-stage safety control.
Background
With the continuous development of the new energy automobile industry, more and more citizens will select electric automobiles to go out in the future, a plurality of social public charging stations are built in cities at present, and the charging stations are provided with high-power direct-current quick charging equipment and mainly serve city renting, logistics, network booking and the like. For urban new energy vehicle owners, charging piles installed in parking lots such as residential districts, office buildings, business supermarkets and parks in the future can become the best choice for charging new energy vehicles, users can charge in the parking lots at any time, and can walk along with the charging without spending a large amount of charging waiting time, and the charging experience is greatly superior to that of social public charging stations.
Use the residential block as an example, at present, the battery charging outfit of resident autonomic installation is mostly 7 kW's alternating-current charging stake in the residential block, and alternating-current charging stake is just similar an electric plug, and only a 220V's of interchange connecting wire fills the unable BMS with the electric motor car and carries out the information interaction, can't read the charged state of vehicle, lacks the real time monitoring to vehicle charging safety. In order to realize the full monitoring of vehicle charging, a direct current charging pile needs to be installed, but the rated output power of most direct current charging piles on the market is above 15kW, and the direct current charging pile is high in product price and high in power load demand.
Along with the increase of residential area electric automobile user quantity, battery charging outfit's power consumption load will constantly increase, and the unordered power consumption load that charges of electric pile can aggravate the electric wire netting of powerful direct current, robbes the load with resident's daily power consumption, can further draw big residential area total load peak valley difference, causes "add the peak on the peak" phenomenon, and this utilization ratio that will cause power supply unit descends, is unfavorable for the stability of electric wire netting, economic operation. Therefore, it is necessary to provide a two-stage safety control small dc charging regulation method and system thereof to overcome the above problems.
Disclosure of Invention
The invention provides a small direct current charging regulation and control method and a system thereof with two-stage safety management and control, and aims to solve the problems that the power load of charging equipment is continuously increased along with the increase of the number of users of electric vehicles in a residential area, the disordered charging mode of a high-power direct current charging pile aggravates the power load of a power grid, the peak-to-valley difference of the total load of the residential area is further increased with the daily power utilization of residents, the phenomenon of peak-to-peak load is caused, the utilization rate of power supply equipment is reduced, and the stable and economic operation of the power grid is not facilitated.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a small direct current charging regulation and control method of two-stage safety management and control comprises the following steps:
s1, acquiring the service condition information of the power utilization load of the transformer through a load acquisition layer to acquire the charging load demand information of each vehicle;
s2, receiving the transformer power utilization load use condition information and the vehicle charging load demand information acquired by the load acquisition layer through the load control layer;
s3, the load control layer calculates the residual available load of the transformer through a charging cloud platform, matches a charging strategy by combining the charging load demand information of each vehicle, and dynamically schedules the charging power of each vehicle;
s4, executing a charging strategy of the load control layer through the terminal output layer, and outputting the distributed charging power to the charging vehicle in order;
and S5, monitoring the load use conditions of the transformer and the charging vehicle in real time through the charging cloud platform, and realizing two-stage safety control on the transformer and the charging vehicle.
Further, in step S1, the load usage information of the transformer is collected in real time by the power collecting device of the load collecting layer, and transmitted to the load control layer.
Further, in step S1, the load collection layer obtains the charging load demand information of each vehicle connected to the terminal output layer through the terminal output layer, and transmits the charging load demand information to the load control layer.
Further, the intelligent ordered charging pile on the terminal output layer acquires the charging load demand information of the vehicle connected with the intelligent ordered charging pile.
Further, in step S3, the load control layer calculates the remaining available load of the transformer through a safety threshold according to the information of the usage condition of the electrical load of the transformer.
Further, in step S3, the load control layer dynamically schedules the output power of the terminal output layer according to the remaining available load of the transformer and in combination with the charging load demand information of each vehicle.
Further, in step S3, the intelligent load control box of the load control layer dynamically schedules the output power of the terminal output layer.
Further, the charging strategy carries out four grades on the charging vehicle, namely a new gun inserting vehicle, a low SOC vehicle, a medium SOC vehicle and a high SOC value vehicle, wherein the new gun inserting vehicle is a vehicle which is just connected with the terminal output layer, the SOC value of the low SOC vehicle is less than 50%, the SOC value range of the medium SOC vehicle is more than or equal to 50% and less than or equal to 80%, and the SOC value of the high SOC value vehicle is more than 80%.
Further, the charging strategy adopts a time-sharing charging mode to charge the vehicle.
The utility model provides a little direct current of two-stage safety control regulation and control system that charges, including the electric power collection system, intelligent load control box, the intelligence fills electric pile and the cloud platform that charges in order, the electric power collection system respectively with the transformer, the intelligence fills electric pile and intelligent load control box in order and is connected, the transformer is connected with intelligent load control box, intelligent load control box is connected with the cloud platform that charges and the intelligent in order fills electric pile respectively and is connected, the electric power collection system is installed in the transformer rear end, the electric power collection system is used for gathering transformer power consumption load service condition information, intelligent load control box is used for installing the charging power who is used for each vehicle of dynamic scheduling in the parking area, the intelligence fills electric pile in order and is used for installing and charges and acquire each vehicle charging load demand information for the vehicle on the parking stall that charges, the cloud platform that charges is used for carrying out real time monitoring transformer and charging vehicle's load service condition.
Compared with the prior art, the invention has the following beneficial effects: according to the small direct current charging regulation and control method and system with two-stage safety control, the electric power collection device, the intelligent load control box, the intelligent ordered charging pile and the charging cloud platform are adopted, the electric power side adopts an electric power load control mode to guarantee the safety of a power grid, the load side adopts a charging safety control mode to guarantee the charging safety, and the charging safety of the electric vehicle is guaranteed through two-stage safety load control.
The invention can be applied to charging matching facilities of parking lots such as residential districts, office buildings, business supermarkets, parks and the like to carry out charging regulation and control of two-stage safety load management and control, so as to realize the purpose of using the least public matching and the lowest charging infrastructure investment and meet more charging requirements.
By taking a residential area as an example, the two-stage safety control small direct current charging regulation and control system is built in the residential area, and the two-stage safety control small direct current charging regulation and control method is adopted, so that the power consumption demand of charging equipment can be controlled through two-stage safety control, the charging equipment is controlled to supply power at the peak time, the charging is started again under the condition of residual load, the peak staggering charging is realized with the power consumption of residents, and the power consumption safety is ensured. Can reduce by a wide margin according to transformer load curve value, 23 after 00 residents 'power consumption capacity night, the transformer available load reaches the biggest this moment, fills electric pile power and can fully open, has realized with resident's off-peak power consumption, has utilized transformer load capacity effectively again.
The invention has the following two specific characteristics:
the power load management and control function: the charging station based on the community is established, the small charging station is quite suitable for entering the community, the problem of insufficient power load is solved, the electric power demand of charging facilities and the original load is avoided, the existing power grid capacity is fully utilized, and the charging load is accessed. The electricity charge cost of the charging station can be greatly optimized, the low-valley rate in large industrial power utilization is enjoyed, the operation mode of a power grid can be improved, and a large amount of operation cost is saved for the charging station.
The intelligent charging management and control function: by matching the charging strategy, the charging power of each vehicle is dynamically scheduled, the safety of the vehicles in the charging process can be guaranteed, and the occurrence of vehicle burning accidents is reduced.
Drawings
Fig. 1 is a schematic step diagram of a two-stage safety control small dc charging regulation and control method according to the present invention.
Fig. 2 is a schematic connection diagram of a two-stage safety control small dc charging regulation and control system according to the present invention.
FIG. 3 is a schematic flow chart diagram illustrating a switching method of vehicles with new gun insertion according to the present invention.
FIG. 4 is a flow chart illustration of the present invention vehicle switching method without new insertion of a gun.
Fig. 5 is a schematic view of a flow chart of an intelligent load control box actively issuing a charging stop command according to the present invention.
Fig. 6 is a schematic view of a flow chart of stopping charging of the ordered intelligent charging pile according to the present invention.
Detailed Description
The technical solutions of the present invention are further described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following descriptions.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without inventive efforts based on the embodiments of the present invention, are within the scope of protection of the present invention.
The present invention will be further described with reference to the following examples, which are intended to illustrate only some, but not all, of the embodiments of the present invention. Other embodiments used by those skilled in the art can be obtained without any creative effort based on the embodiments in the present invention, and all of them belong to the protection scope of the present invention.
Referring to fig. 1 to 6, an embodiment of the present invention is shown, which is for illustration purposes only and is not limited to this structure.
Example one
As shown in fig. 1, a two-stage safety control small dc charging regulation and control method includes the following steps:
s1, acquiring the service condition information of the power utilization load of the transformer through a load acquisition layer to acquire the charging load demand information of each vehicle;
s2, receiving the transformer power utilization load use condition information and the vehicle charging load demand information acquired by the load acquisition layer through the load control layer;
s3, the load control layer calculates the residual available load of the transformer through a charging cloud platform, matches a charging strategy by combining the charging load demand information of each vehicle, and dynamically schedules the charging power of each vehicle;
s4, executing a charging strategy of a load control layer through a terminal output layer, and outputting distributed charging power to the charging vehicle in order;
and S5, monitoring the load use conditions of the transformer and the charging vehicle in real time through the charging cloud platform, and realizing two-stage safety control on the transformer and the charging vehicle.
In the step S1, the load use condition information of the transformer is collected in real time through a power collecting device of a load collecting layer and is transmitted to a load control layer. The load acquisition layer acquires the charging load demand information of each vehicle connected with the terminal output layer through the terminal output layer and transmits the charging load demand information to the load control layer. And the intelligent ordered charging pile on the terminal output layer acquires the charging load demand information of the vehicle connected with the intelligent ordered charging pile.
In step S3, the load control layer calculates through a safety threshold according to the service condition information of the electrical load of the transformer, and obtains the residual available load of the transformer. And the load control layer dynamically schedules the output power of the terminal output layer according to the residual available load of the transformer and the charging load demand information of each vehicle. And dynamically scheduling the output power of the terminal output layer through an intelligent load control box of the load control layer.
The charging strategy carries out four grades on the charging vehicles, namely a new gun inserting vehicle, a low-SOC vehicle, a medium-SOC vehicle and a high-SOC vehicle, wherein the new gun inserting vehicle is a vehicle just connected with a terminal output layer, the SOC value of the low-SOC vehicle is less than 50%, the SOC value range of the medium-SOC vehicle is more than or equal to 50% and less than or equal to 80%, and the SOC value of the high-SOC vehicle is more than 80%. The charging strategy adopts a time-sharing charging mode to charge the vehicle.
As shown in fig. 2, a two-stage safety control's little direct current regulation and control system that charges, including the electric power collection system, intelligent load control box, intelligent orderly charging pile and charging cloud platform, the electric power collection system respectively with the transformer, intelligent orderly charging pile and intelligent load control box are connected, the transformer is connected with intelligent load control box, intelligent load control box is connected with charging cloud platform and intelligent orderly charging pile respectively, the electric power collection system is installed at the transformer rear end, the electric power collection system is used for gathering transformer power consumption load service condition information, intelligent load control box is used for installing the charging power that is used for dynamic scheduling each vehicle in the parking area, intelligent orderly charging pile is used for installing and charges and obtain each vehicle charging load demand information for the vehicle on charging the parking stall, charging cloud platform is used for carrying out real time monitoring transformer and charging vehicle's load service behavior.
In the vehicle charging process, the intelligent orderly charging pile continuously performs information interaction with the vehicle, and charging safety protection is performed on abnormal vehicles. In the information interaction process, the intelligent orderly charging pile acquires information such as battery balance, battery highest temperature, maximum temperature difference, temperature rise rate, monomer highest voltage, maximum pressure difference, SOC change rate and monomer voltage change rate of the charging vehicle in real time, and transmits the information to the charging cloud platform through the intelligent load control box, so that the charging cloud platform can monitor the charging safety of the vehicle in real time.
Example two
The charging strategy mainly uses the SOC value and assists in dividing the charging priority of the charging vehicle and scheduling the charging power, and the charging priority is as follows: the system comprises a new gun insertion vehicle queue, a low SOC vehicle queue, a medium SOC vehicle queue and a high SOC value vehicle queue, and realizes time-sharing charging of the charging vehicles. The SOC value of the vehicle is acquired in real time through the intelligent orderly charging pile, and the time base of time-sharing charging can be set in the intelligent load control box or the charging cloud platform. And boundary values of SOC values of four grades of the charging vehicle by the charging strategy can be set in an intelligent load control box or a charging cloud platform. The boundary values of the time base and the SOC value can be adjusted according to actual conditions.
The charging strategy comprises a new gun inserting vehicle switching method and a new gun inserting vehicle switching method.
As shown in fig. 3, the switching method of the new gun-inserting vehicle is as follows:
when a new vehicle arrives, the vehicle queue for new gun insertion is entered after gun insertion, and multiple vehicles can be compatible for gun insertion. Checking the charging state of the current vehicle, if the SOC value of the current vehicle is more than or equal to 50%, carrying out SOC classification, and entering a middle SOC vehicle queue; if the SOC value of the current vehicle is less than 50%, judging the time base of time-sharing charging, and if the time base of time-sharing charging is reached, grading the SOC and entering a low-SOC vehicle queue; if the time base number of the time-sharing charging is not reached, the current charging is continued until the SOC value is greater than or equal to 50% or the time base number of the time-sharing charging is reached, and then the SOC grading is carried out. The time base can be set to 20 minutes, 30 minutes and the like, and can be adjusted according to practical application.
After SOC classification, judging whether a new gun inserting vehicle queue has a vehicle, if so, charging the new gun inserting vehicle; if not, the charging channel is switched to the queue of the next charging priority, namely, the low SOC vehicle queue.
And (4) charging the new gun inserting vehicle, namely changing the new gun inserting vehicle into the current vehicle, and repeating the charging state judgment process of the current vehicle.
Wherein the SOC is graded to divide the vehicle into a low SOC vehicle queue or a medium SOC vehicle queue or a high SOC value vehicle queue.
As shown in fig. 4, the switching method of the vehicle without the new gun insertion is as follows:
in the process of executing the charging strategy, if no new gun plugging vehicle exists, the charging time base number is taken as an interval, and the SOC grade is taken as a switching basis. And charging the vehicles in the low SOC vehicle queue, the medium SOC vehicle queue and the high SOC vehicle queue layer by layer until the SOC value reaches a higher-layer grade, and finally, completing the charging of the vehicles. The vehicle charging processes of the low SOC vehicle queue, the medium SOC vehicle queue and the high SOC vehicle queue are similar, the judgment values of the SOC values and the time base numbers are different, the judgment values need to be set according to SOC value ranges of different queues, the time base numbers are set according to actual needs, and the time base numbers can be the same or different.
Taking the vehicle charging process of the low SOC vehicle queue as an example, a flow chart of the switching method of the vehicle without the new gun insertion is shown in fig. 4.
Firstly, whether vehicles queue in the low SOC vehicle queue is judged. If the vehicles are queued, firstly charging the vehicles at the head of the queue according to the sequence of queuing time; and if the vehicles are not queued, performing a vehicle charging process of the SOC vehicle queue.
Judging whether the SOC value reaches a critical value of the next grade or not in the charging process, and if the SOC value is larger than or equal to 50 percent in the low-SOC vehicle queue, stopping charging the vehicle and enabling the vehicle to enter the middle-SOC vehicle queue; and then judging whether vehicles are queued in the low SOC vehicle queue, if so, switching the charging channel to the queued vehicles according to the sequence of queuing time for charging, and if not, performing the vehicle charging process of the medium SOC vehicle queue.
If the SOC value is less than 50%, time base judgment is carried out, if the SOC value reaches the time base, whether a vehicle queues in the low-SOC vehicle queue or not is judged, if a vehicle queues in the low-SOC vehicle queue, the vehicle stops charging, the vehicle enters the tail of the low-SOC vehicle queue, namely the vehicle queues again, and a charging channel is switched to the vehicles in the queue to charge according to the sequence of the queuing time; if there are no vehicles in line, the vehicle recalculates the time base to continue charging.
If the time base is not reached, the vehicle recalculates the time base to continue charging until the SOC value is greater than or equal to 50%, and then enters the middle SOC vehicle queue.
EXAMPLE III
There are two starting points for stopping charging: firstly, the intelligent load control box actively sends a charging stopping command; secondly, the intelligent orderly charging pile stops charging.
After the intelligent load control box actively issues a charging stopping command, the method mainly comprises two conditions, namely, a channel to be stopped is a current charging channel, each queue is inquired, the next channel to be switched to is obtained, channel switching is carried out, and the current channel is informed to quit queuing; the second method is that the charging stopping channel is not a charging channel, each queue is inquired, and the queuing information of the vehicle on the channel is deleted. The flow is shown in fig. 5.
The intelligent orderly charging pile stops charging and is divided into two triggering conditions: the first is that the BMS actively stops charging or other faults of the vehicle cause, the current vehicle charging needs to be stopped at the moment, the vehicle switching is carried out, and the vehicle queuing information is cleared; and secondly, the faults caused by the intelligent orderly charging pile, such as power unit faults and the like, the charging pile is stopped to be charged at the moment, the reset state is returned, and the queuing information of the charging pile is cleared. The flow is shown in fig. 6.
The above-described embodiments are intended to be illustrative, not limiting, of the invention, and therefore, variations of the example values or substitutions of equivalent elements are intended to be within the scope of the invention.
From the foregoing detailed description, it will be apparent to those skilled in the art that the foregoing objects and advantages of the invention have been achieved in accordance with the provisions of the patent statutes.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention. The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, it should be noted that any modifications, equivalents and improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. A small direct current charging regulation and control method of two-stage safety management and control is characterized by comprising the following steps:
s1, acquiring service condition information of a power load of a transformer through a load acquisition layer to acquire charging load demand information of each vehicle;
s2, receiving the transformer power utilization load use condition information and the vehicle charging load demand information acquired by the load acquisition layer through the load control layer;
s3, the load control layer calculates the residual available load of the transformer through a charging cloud platform, matches a charging strategy by combining the charging load demand information of each vehicle, and dynamically schedules the charging power of each vehicle;
s4, executing a charging strategy of the load control layer through the terminal output layer, and outputting the distributed charging power to the charging vehicle in order;
s5, monitoring the load use conditions of the transformer and the charging vehicle in real time through the charging cloud platform, and realizing two-stage safety control on the transformer and the charging vehicle;
the charging strategy carries out four grades on the charging vehicles, namely a new gun inserting vehicle, a low-SOC vehicle, a medium-SOC vehicle and a high-SOC vehicle, wherein the new gun inserting vehicle is a vehicle which is just connected with a terminal output layer, the SOC value of the low-SOC vehicle is less than 50%, the SOC value range of the medium-SOC vehicle is more than or equal to 50% and less than or equal to 80%, and the SOC value of the high-SOC vehicle is more than 80%; the charging strategy adopts a time-sharing charging mode to charge the vehicle;
when a new vehicle arrives, the vehicle enters a new gun inserting vehicle queue after gun insertion, and multiple vehicle gun insertion can be compatible;
checking the charging state of the current vehicle, if the SOC value of the current vehicle is more than or equal to 50%, carrying out SOC classification, and entering a middle SOC vehicle queue; if the SOC value of the current vehicle is less than 50%, judging the time base of time-sharing charging, and if the time base of time-sharing charging is reached, grading the SOC and entering a low-SOC vehicle queue; if the time base number of the time-sharing charging is not reached, the current charging is continued until the SOC value is more than or equal to 50 percent or the time base number of the time-sharing charging is reached, and then the SOC classification is carried out.
2. The two-stage safety control small direct current charging regulation and control method according to claim 1, wherein in step S1, load use condition information of the transformer is collected in real time by a power collection device of a load collection layer and transmitted to a load control layer.
3. The method as claimed in claim 2, wherein in step S1, the load collection layer obtains the charging load demand information of each vehicle connected to the terminal output layer through the terminal output layer, and transmits the charging load demand information to the load control layer.
4. The method for regulating and controlling the charging of the two-level safety control system according to claim 3, wherein the intelligent orderly charging pile on the terminal output layer obtains the charging load demand information of the vehicle connected with the intelligent orderly charging pile.
5. The method for regulating and controlling the charging of the small direct current of the two-stage safety control according to claim 1, wherein in the step S3, the load control layer calculates the remaining available load of the transformer through a safety threshold according to the information of the service condition of the electrical load of the transformer.
6. The method as claimed in claim 5, wherein in step S3, the load control layer dynamically schedules the output power of the terminal output layer according to the remaining available load of the transformer and the charging load demand information of each vehicle.
7. The method as claimed in claim 6, wherein in step S3, the output power of the terminal output layer is dynamically scheduled by an intelligent load control box of the load control layer.
8. A two-stage safety-controlled small direct current charging regulation and control system is characterized by comprising a power acquisition device, an intelligent load control box, an intelligent orderly charging pile and a charging cloud platform, wherein the intelligent orderly charging pile adopts the regulation and control method of any one of claims 1 to 7 to regulate and control charging, the power acquisition device is respectively connected with a transformer, the intelligent orderly charging pile and the intelligent load control box, the transformer is connected with the intelligent load control box, the intelligent load control box is respectively connected with the charging cloud platform and the intelligent orderly charging pile, the power acquisition device is installed at the rear end of the transformer and is used for acquiring service condition information of power loads of the transformer, the intelligent load control box is used for being installed in a parking lot and dynamically scheduling charging power of each vehicle, the intelligent orderly charging pile is used for being installed in a charging parking lot to charge the vehicle and acquiring charging load demand information of each vehicle, and the charging cloud platform is used for monitoring load service conditions of the transformer and the charging vehicle in real time.
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