CN115837855A - Charging pile output power control method and device, charging pile and storage medium - Google Patents
Charging pile output power control method and device, charging pile and storage medium Download PDFInfo
- Publication number
- CN115837855A CN115837855A CN202310118307.0A CN202310118307A CN115837855A CN 115837855 A CN115837855 A CN 115837855A CN 202310118307 A CN202310118307 A CN 202310118307A CN 115837855 A CN115837855 A CN 115837855A
- Authority
- CN
- China
- Prior art keywords
- power control
- file
- candidate
- target
- control file
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 51
- 238000004590 computer program Methods 0.000 claims description 21
- 125000004122 cyclic group Chemical group 0.000 claims description 9
- 238000012216 screening Methods 0.000 claims description 5
- 230000000737 periodic effect Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 6
- 238000013500 data storage Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 238000003780 insertion Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000003203 everyday effect Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910021389 graphene Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Images
Classifications
-
- 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
- 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
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The application relates to a charging pile output power control method, a charging pile output power control device, a charging pile and a storage medium, wherein the charging pile output power control method comprises the following steps: receiving a plurality of power control files which are sent by a server and are associated with a target charging pile; the method comprises the steps that a plurality of power control files are generated for a server according to charging demand information of an area where a target charging pile is located, and each power control file is configured with output power limiting information and an initial priority; determining a plurality of candidate power control files related to the target time period from each power control file according to the output power limit information; determining a target power control file executed in a target time period from the plurality of candidate power control files according to the output power limit information and the initial priority of each candidate power control file; and determining the output power of the target charging pile in the target time period based on the output power limit information contained in the target power control file. By adopting the method, the charging power of any charging pile in different areas in any time period can be controlled.
Description
Technical Field
The present application relates to the field of internet of things technology, and in particular, to a charging pile output power control method, apparatus, charging pile, storage medium, and computer program product.
Background
With the rapid rise of the new energy industry, the demand of a charging device with multiple functions in the market is higher and higher. During the peak period of power utilization, the charging output power of the charging pile needs to be limited to meet the requirements of a local power grid. However, different areas have different charging power requirements at different time intervals, and the charging pile usually has only a single power charging function, and has low adaptability to a local power grid.
Disclosure of Invention
Therefore, it is necessary to provide a charging pile output power control method, a charging pile output power control device, a charging pile, a computer readable storage medium, and a computer program product, for solving the technical problems that the existing charging pile only has a single power charging function and has low adaptability to a local power grid.
In a first aspect, the application provides a charging pile output power control method. The method comprises the following steps:
receiving a plurality of power control files which are sent by a server and are associated with a target charging pile; the power control files are generated by the server according to the charging demand information of the area where the target charging pile is located, and each power control file is configured with output power limiting information and an initial priority;
determining a plurality of candidate power control files related to a target time period from the power control files according to the output power limit information; the target time period is any effective time period;
determining a target power control file executed in the target time period from the plurality of candidate power control files according to the output power limit information and the initial priority of each candidate power control file;
and determining the output power of the target charging pile in the target time period based on the output power limit information contained in the target power control file.
In one embodiment, each power control file further includes a charging gun identification of the restricted charging gun; the method further comprises the following steps:
determining a control type corresponding to each candidate power control file according to at least one condition of the output power limit information and the charging gun identifier;
and determining a target power control file executed in the target time period from the plurality of candidate power control files according to the output power limit information, the initial priority and the control type of each candidate power control file.
In one embodiment, the output power limitation information includes limitation power and limitation time, and the control type includes: a maximum power control type, a cycle control type and a temporary control type;
the determining the control type corresponding to each candidate power control file according to at least one condition of the output power limitation information and the charging gun identifier includes:
when the charging gun identifications contained in the candidate power control file are identifications representing all charging guns of the target charging pile, determining that the control type of the candidate power control file is a maximum power control type;
when the limiting time contained in the candidate power control file has periodicity, determining the control type of the candidate power control file as a cycle control type;
and when the limiting power and the limiting time contained in the candidate power control file are temporary, determining that the control type of the candidate power control file is a temporary control type.
In one embodiment, the determining, from the plurality of candidate power control files, a target power control file to be executed in the target time period according to the output power limitation information, the initial priority, and the control type of each candidate power control file includes:
classifying the candidate power control files according to the control types to obtain a plurality of candidate file sets;
aiming at each candidate file set, selecting a candidate power control file with the highest initial priority from the candidate file set according to the initial priority of each candidate power control file in the candidate file set;
and determining the target power control file from the candidate power control file with the highest initial priority corresponding to each candidate file set according to the control type and the output power control information.
In one embodiment, the determining the target power control file from the candidate power control file with the highest initial priority corresponding to each candidate file set according to the control type and the output power control information includes:
and determining the target power control file from the candidate power control file with the highest initial priority corresponding to each candidate file set according to the condition that the priority of the power control file of the temporary control type is higher than that of the power control file of the cyclic control type and the condition that the priority of the power control file with the smaller limiting power within the same limiting time is higher.
In one embodiment, each power control file further has a corresponding control type, and after receiving the plurality of power control files associated with the target charging pile sent by the server, the method further includes:
inquiring the control type and the initial priority of a current power control file corresponding to the target charging pile;
and if a second power control file which is the same as the control type and the initial priority of a first power control file in the received multiple power control files exists in the current power control file, replacing the second power control file with the first power control file.
In one embodiment, the output power limit information includes a limit time, the limit time including an effective time and an end time of the power control file; the method further comprises the following steps:
acquiring the limit time of a current power control file corresponding to the target charging pile;
and deleting the invalid power control file when detecting that the invalid power control file exists in the current power control file according to the effective time and the termination time in the limit time.
In a second aspect, the application further provides a charging pile output power control device. The device comprises:
the file receiving module is used for receiving a plurality of power control files which are sent by a server and are associated with the target charging pile; the power control files are generated by the server according to the charging demand information of the area where the target charging pile is located, and each power control file is configured with output power limiting information and an initial priority;
the first screening module is used for determining a plurality of candidate power control files related to a target time period from the power control files according to the output power limit information; the target time period is any effective time period;
the second screening module is used for determining a target power control file executed in the target time period from the candidate power control files according to the output power limit information and the initial priority of each candidate power control file;
and the power determining module is used for determining the output power of the target charging pile in the target time period based on the output power limit information contained in the target power control file.
In a third aspect, the application further provides a charging pile. The charging pile comprises a memory and a processor, the memory stores a computer program, and the processor realizes the following steps when executing the computer program:
receiving a plurality of power control files which are sent by a server and are associated with a target charging pile; the power control files are generated for the server according to the charging demand information of the area where the target charging pile is located, and each power control file is configured with output power limiting information and an initial priority;
determining a plurality of candidate power control files related to a target time period from the power control files according to the output power limit information; the target time period is any effective time period;
determining a target power control file executed in the target time period from the plurality of candidate power control files according to the output power limit information and the initial priority of each candidate power control file;
and determining the output power of the target charging pile in the target time period based on the output power limit information contained in the target power control file.
In a fourth aspect, the present application further provides a computer-readable storage medium. The computer-readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of:
receiving a plurality of power control files which are sent by a server and are associated with a target charging pile; the power control files are generated by the server according to the charging demand information of the area where the target charging pile is located, and each power control file is configured with output power limiting information and an initial priority;
determining a plurality of candidate power control files related to a target time period from the power control files according to the output power limit information; the target time period is any effective time period;
determining a target power control file executed in the target time period from the plurality of candidate power control files according to the output power limit information and the initial priority of each candidate power control file;
and determining the output power of the target charging pile in the target time period based on the output power limit information contained in the target power control file.
In a fifth aspect, the present application further provides a computer program product. The computer program product comprising a computer program which when executed by a processor performs the steps of:
receiving a plurality of power control files which are sent by a server and are associated with a target charging pile; the power control files are generated for the server according to the charging demand information of the area where the target charging pile is located, and each power control file is configured with output power limiting information and an initial priority;
determining a plurality of candidate power control files related to a target time period from the power control files according to the output power limit information; the target time period is any effective time period;
determining a target power control file executed in the target time period from the plurality of candidate power control files according to the output power limit information and the initial priority of each candidate power control file;
and determining the output power of the target charging pile in the target time period based on the output power limit information contained in the target power control file.
According to the charging pile output power control method, the charging pile output power control device, the charging piles, the storage medium and the computer program product, the server generates a plurality of power control files according to charging demand information of each area, and configures output power limiting information and initial priority for each power control file, so that each power control file associated with each charging pile can be issued to each charging pile, each charging pile can screen candidate power control files in any effective time period from the power control files associated with each charging pile, and a target power control file executed in a target time period is determined from each candidate power control file on the basis of the output power limiting information and the initial priority; and determining the output power of the target charging pile in the target time period based on the output power limit information contained in the target power control file. The charging power control of any charging pile in different areas in any time period is realized by the method that the server generates a plurality of power control files and sends the power control files to each charging pile, so that the technical problem that the existing charging pile only has a single power charging function and is low in adaptability to a local power grid is solved.
Drawings
FIG. 1 is a diagram of an exemplary implementation of a method for controlling output power of a charging pile;
FIG. 2 is a flowchart illustrating a method for controlling output power of a charging pile according to an embodiment;
FIG. 3 is a diagram of a power control file model in one embodiment;
FIG. 4 is a diagram of a multiple file stacking model in one embodiment;
FIG. 5 is a flowchart illustrating the target power control file determination step in one embodiment;
FIG. 6 is a block diagram of an exemplary output power control device for a charging pile;
fig. 7 is an internal structure view of a charging pile in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.
The charging pile output power control method provided by the embodiment of the application can be applied to the application environment shown in fig. 1. Wherein, charging pile 102 communicates with server 104 through the network. The data storage system can store power control files of different charging piles in a plurality of areas. The data storage system may be integrated on the server 104, or may be located on the cloud or other network server. The charging pile 102 comprises a charging main control unit and a power supply module, the server 104 issues a power control file corresponding to the charging pile 102 to the charging main control unit of the charging pile 102 through a network, the charging main control unit calculates limited transmission power according to a preset rule, and then the purpose of limiting the output power is achieved by controlling the output current of the power supply module. The server 104 may be implemented as a stand-alone server or a server cluster composed of a plurality of servers.
In an embodiment, as shown in fig. 2, a charging pile output power control method is provided, which is described by taking the charging main control unit of the charging pile 102 in fig. 1 as an example, and includes the following steps:
step S210, receiving a plurality of power control files which are sent by a server and are associated with a target charging pile; the power control files are generated for the server according to the charging demand information of the area where the target charging pile is located, and each power control file is configured with output power limiting information and an initial priority.
The output power limit information may include a limit time and a limit power, among others.
The target charging pile can be any charging pile in any area.
Wherein the initial priority indicates a priority of the power control file under the control type.
Referring to fig. 3, which is a schematic diagram of a power control file model according to an embodiment, a power control file may have a plurality of limiting parameter tables to form a linked list, so as to satisfy the limitation of implementing different powers in multiple periods within a control time. The starting time + duration defines the effective period of a limiting parameter table, the UTC time is required to be used for all the time, and the time representation method uses the ISO 8601 date-time representation method. The limit power defines the charging power value that is required to limit the charging post during the validity period.
In the specific implementation, the server can generate a power control file of the charging pile in each area in advance according to the charging demand information of each area, the power control file is stored in the data storage system, when the charging power of a target charging pile in a certain area needs to be controlled, a power control request is sent to the server, the server responds to the power control request, a plurality of power control files related to the target charging pile are inquired from the data storage system and sent to the target charging pile, specifically to a charging main control unit of the target charging pile, and therefore the target charging pile can obtain a plurality of corresponding power control files.
Step S220, according to the output power limiting information, a plurality of candidate power control files related to the target time period are determined from each power control file; the target time period is any valid time period.
In a specific implementation, different power control files have different limiting information, and specifically, different limiting powers and limiting times may be provided, that is, the effective time of each power control file is different, so that, for any effective target time period, a plurality of candidate power control files associated with the target time period are determined from each power control file according to the limiting time of each power control file, and thus a target power control file for controlling the output power of the target charging pile in the target time period is determined from each candidate power control file.
In step S230, a target power control file executed in the target time period is determined from the plurality of candidate power control files according to the output power limit information and the initial priority of each candidate power control file.
In a specific implementation, different power control files may have different control types, and the control types may affect the determination result of the target power control file in addition to the output power limitation information and the initial priority. Therefore, before determining the target power control file, the control type corresponding to each candidate power control file needs to be determined, and the target power control file executed in the target time period is determined from each candidate power control file by combining the output power limit information, the initial priority and the control type of each candidate power control file.
Step S240, determining the output power of the target charging pile in the target time period based on the output power limitation information included in the target power control file.
In the specific implementation, only one target power control file is provided in the same time interval, when the time of the target time period is long, multiple time intervals may need to be divided, and multiple determined target power control files may be provided. When only one target power control file is available corresponding to the target time period, the output power of the target charging pile in the target time period can be controlled within the range of the limited power in the target power control file.
In the charging pile output power control method, a server generates a plurality of power control files according to charging demand information of each area, and configures output power limit information and initial priority for each power control file, so that each charging pile can issue each power control file associated with each charging pile, each charging pile can screen candidate power control files in any effective time period from the power control files associated with each charging pile, and a target power control file executed in a target time period is determined from each candidate power control file based on the output power limit information and the initial priority; and determining the output power of the target charging pile in the target time period based on the output power limit information contained in the target power control file. The method for generating a plurality of power control files by the server and issuing the power control files to each charging pile realizes the charging power control of any charging pile in different areas in any time period, and can control all the piles of the whole charging station at one time in a file mode, and can trace back, thereby being convenient for recording and tracing; by means of multi-file stacking, the power limit requirement of any time period in most practical operation can be met conveniently.
In an exemplary embodiment, each power control file also contains a charging gun identification for the restricted charging gun; the determining of the target power control file in step S230 further includes:
step S231, determining a control type corresponding to each candidate power control file according to at least one condition of the output power limit information and the charging gun identification;
step S232, determining a target power control file executed in the target time period from the plurality of candidate power control files according to the output power limitation information, the initial priority, and the control type of each candidate power control file.
Wherein each power control file must use the charging gun identification to specify which gun of the charging pile to perform the power limitation. For example, a number represents a charging gun identifier, 0 represents the charging pile body, namely all charging guns corresponding to the charging pile, and [1 \8230, N ] respectively represent charging gun numbers specifically connected with the charging pile.
Specifically, since the output power limitation information includes the limitation time and the limitation power, the determination of the target power control file further includes: and determining a control type corresponding to each candidate power control file according to at least one condition of the limiting time, the limiting power and the charging gun identifier, and determining a target power control file executed in a target time period from the multiple candidate power control files according to the output power limiting information, the initial priority and the control type of each candidate power control file.
In this embodiment, in consideration of the influence of the control type on the determination of the output power of the charging pile, the control type of each candidate power control file is determined according to at least one of the output power limit information and the charging gun identifier, and then the target power control file is determined by combining the control type, the output power limit information, and the initial priority, so that the matching degree between the determined target power control file and the actual charging demand can be improved.
In an exemplary embodiment, the present application defines three control types, including: the control system comprises a maximum power control type, a cycle control type and a temporary control type, wherein each control type is defined as follows:
1. the maximum power control type: in a load balancing scenario, the charging pile should have one or more maximum power control files to limit the charging power of all charging guns of the entire charging pile, and the output power of all guns of the entire charging pile should not exceed the limit power value in the limit parameter within the time specified by the limit parameter. The specific power limit values and time points are defined in a linked list of limiting parameters.
2. The cycle control type: in a load balancing scenario, the charging pile is allowed to use a cyclic control type file to indicate that the charging pile needs to perform power control periodically, wherein the period may be day, week and month. In this period, the charging main control unit calculates the power limit value at the current time point by itself to control the output power. The specific power limit values and time points are defined in a linked list of limiting parameters.
3. The temporary control type: in a load balancing scene, the charging pile is allowed to use the temporary control type file, which indicates that the charging pile needs to temporarily limit power, and the charging main control unit needs to automatically delete the temporary control file beyond the time point described in the limiting parameter. And the temporary control file enjoys a higher priority in the rules of the file stack than the loop control file, i.e., the temporary control file overrides the loop control file if within the same period of time. The specific power limit value and the limit time are defined in a limit parameter linked list.
In the step S231, the control type corresponding to each candidate power control file is determined according to at least one condition of the output power limit information and the charging gun identifier, which may specifically be implemented by the following steps:
step S231a, when the charging gun identifiers included in the candidate power control file are identifiers of all charging guns representing the target charging pile, determining that the control type of the candidate power control file is the maximum power control type.
For example, if 0 represents the charging pile body, i.e. all charging guns corresponding to the charging pile, [ 1' \8230n ] represents charging gun numbers specifically connected to the charging pile, respectively, when the charging gun identifier included in the candidate power control file is 0, it may be determined that the control type of the candidate power control file is the maximum power control type.
In step S231b, when the constraint time included in the candidate power control file has periodicity, it is determined that the control type of the candidate power control file is a loop control type.
Specifically, the cycle of the cyclic control type may be day, week, month, or the like. For example, if the time limit of a candidate power control file is 8 to 21 points per day or monday per week, the control type of the candidate power control file may be determined as the cyclic control type.
In step S231c, when the limited power and the limited time contained in the candidate power control file are temporary, it is determined that the control type of the candidate power control file is the temporary control type.
Specifically, the power of the charging pile is temporarily limited to 60kW from 5 months 1 to 5 months 2 days in 2023.
In this embodiment, because the charging demand of the power grid is various, this embodiment distinguishes different charging demands by defining a plurality of different control types, and is convenient for the control of the charging power according to the control type in the follow-up.
Referring to fig. 4, the present application further defines a stacking rule of a multi-file stacking model:
in one embodiment, power control files of the same control type are allowed to have multiple priorities while having the same multiple different control types. In general, different power control files should contain different limiting parameters, including different schedules and different limiting powers.
In one embodiment, there should be at least one maximum power control file to limit the charging power of all charging guns of the entire charging post.
In one embodiment, to avoid collisions, one charging gun does not allow for multiple power control files with the same priority and control type. If the charging main control unit receives the power control files with the same priority and control type sent by the server, the charging main control unit should replace the existing power control files.
In one embodiment, at any point in time, the charging master unit should traverse all of the power control files. Among all the power control files under the same control type, the control file which is valid at the time point and has the highest priority should be selected, and a comprehensive limited power table of the control type is obtained. The table obtains the final time by calculating the minimum value for each time interval, which need not be of fixed length. And the charging main control unit selects the minimum limit power value according to the three sorted comprehensive limit power tables and then sends the limit power value to the power module.
In one embodiment, to implement the queue-insertion mode, the temporary control file enjoys a higher priority in the rules of the file stack than the loop control file, i.e., the temporary control file overrides the loop control file if within the same time period.
In an exemplary embodiment, as shown in fig. 5, in the step S232, the target power control file executed in the target time period is determined from the multiple candidate power control files according to the output power limitation information, the initial priority, and the control type of each candidate power control file, and specifically, the step S232 may be implemented by:
step S510, classifying each candidate power control file according to the control type to obtain a plurality of candidate file sets;
step S520, aiming at each candidate file set, selecting a candidate power control file with the highest initial priority from the candidate file set according to the initial priority of each candidate power control file in the candidate file set;
step S530, according to the control type and the output power control information, a target power control file is determined from the candidate power control files with the highest initial priority corresponding to each candidate file set.
In particular, the present application is directed to the multiple file stacking rule shown in fig. 4, so that each power control file requires an initial priority level for limitation. And the initial high priority value enjoys a relatively high priority. In any effective time period, the charging main control unit can determine the power control file with the highest initial priority in the power control files of each control type, then according to a multi-file stacking rule, a target power control file is determined from the power control files with the highest initial priority selected under each control type, and the output power executed in the target time period is calculated.
In this embodiment, the power control file with the highest initial priority is selected from the candidate file set corresponding to each type, and then the target power control file is determined from the power control file with the highest initial priority selected under each control type.
Further, in an exemplary embodiment, in step S330, determining, according to the control type and the output power control information, a target power control file from candidate power control files with the highest initial priority corresponding to each candidate file set, includes: and determining a target power control file from the candidate power control files with the highest initial priority corresponding to each candidate file set according to the condition that the priority of the power control file of the temporary control type is higher than that of the power control file of the cyclic control type and the condition that the priority of the power control file of the smaller limiting power in the same limiting time is higher under the non-temporary control type.
In this embodiment, the temporary control file corresponding to the temporary control type has a higher priority in the rule of file stacking than the loop control file corresponding to the loop control type, that is, if the temporary control file is in the same time period, the temporary control file may override the loop control file, so as to implement the queue insertion mode. In the case of a plurality of power control files with limited power within the same limited time, the priority of the power control file with the smaller limited power is set higher, so that the determined target power control file can meet the requirements of all the power control files.
In an exemplary embodiment, each power control file further has a corresponding control type, and after receiving the plurality of power control files associated with the target charging pile sent by the server in step S210, the method further includes:
step S211, inquiring the control type and the initial priority of a current power control file corresponding to the target charging pile;
in step S212, if a second power control file exists in the current power control file, where the control type and the initial priority of the second power control file are the same as those of a first power control file in the received multiple power control files, the second power control file is replaced with the first power control file.
The current power control file can be understood as a power control file which is currently stored by the charging main control unit of the target charging pile and is associated with the target charging pile.
In this embodiment, after receiving a plurality of power control files associated with a target charging pile and sent by a server, a charging main control unit of the charging pile queries a control type and an initial priority of a current power control file corresponding to the target charging pile, and replaces a second power control file with the first power control file when the second power control file is present in the current power control file, where the control type and the initial priority of the first power control file are the same as those of the received plurality of power control files, so as to ensure uniqueness of each power control file of each initial priority in each charging pile, and avoid file conflicts.
In an exemplary embodiment, the output power limitation information includes a limitation time including an effective time and an end time of the power control file; the method further comprises the following steps: acquiring the limit time of a current power control file corresponding to the target charging pile; and deleting the invalid power control file when detecting that the invalid power control file exists in the current power control file according to the effective time and the termination time in the limit time.
In this embodiment, each power control file further needs to declare an effective time and a termination time to clarify the effective time of the power control file, and when it is detected that any one of the currently stored power control files of the charging main control unit of the target charging pile exceeds the effective time, that is, the current power control file is invalid, the charging main control unit automatically deletes the power control file, so as to reduce occupation of a storage space of the charging pile.
In one embodiment, to facilitate understanding of embodiments of the application by those skilled in the art, reference will now be made to the specific examples illustrated in the accompanying drawings. Carry out the restriction to filling electric pile power according to local electric wire netting with certain charging station needs, require as follows:
a) Since the charging station is just built and the power applied is insufficient, the output power of each charging pile is limited to 100kW between 2022-03-01 and 2022-03-28, and then the power can be recovered to 120kW from 3 months and 28 days of 2022 years for 5 years.
b) In 2022, in order to respond to the requirement of peak clipping and valley leveling of a power grid, the charging power of each charging pile is limited to 100kW from 8 o 'clock to 21 o' clock every day, and is recovered to 120kW from 21 o 'clock to 8 o' clock next day in the early morning.
c) After summer, in order to reduce the load of the power grid, power limitation is carried out between 2022-06-01 and 2022-09-01, and the charging power of each charging pile is limited to 80kW from 8 o 'clock to 21 o' clock every day in the period of time and is limited to 100kW from 21 o 'clock every night to 8 o' clock in the next morning.
d) Due to the grid regulation, the charging power of each charging post needs to be temporarily limited to 60kW at 2022-05-01 to 2022-05-02.
In order to meet the above requirements, the output power control method provided by the present application can be used to meet the requirements.
Referring to table 1, in order to meet the requirement a, a maximum power control file can be issued to limit the output power of the charging pile to 100kW in 2022-03-01 to 2022-03-28, and then to limit the output power of the charging pile to 120kW, and the validity period of the file is up to 2027-3-28.
Referring to table 2, in order to meet the requirement b, a cyclic control file (priority 0) may be issued, and it may be implemented that the charging power of each peg is limited to 100kW from 8 pm to 21 pm in 2022, and the charging power is restored to 120kW from 21 pm to 8 pm in the next morning.
Referring to table 3, in order to satisfy the above-described requirement c, a cyclic control file (priority 1) may be issued. This file has a higher priority at 2022-06-01 to 2022-09-01 than the power control file in table 2. Therefore, according to the file stacking rule specified in the application, during the period, the file replaces the power control file in the table 2, the charging power of each charging pile is limited to 80kW from 8 pm to 21 pm, and the charging power of each charging pile is limited to 100kW from 21 pm to 8 pm in the next morning.
Referring to table 4, in order to satisfy the above d requirement, a temporary control file may be issued. According to the file stacking rule specified in the application, the temporary control file can push over all the circulation control files within the effective time. It may be realised that 2022-05-01 to 2022-05-02 temporarily limits each pile to 60kW.
According to the multi-file stacked charging pile power remote intelligent regulation and control method, the charging power limitation can be achieved in any certain time period and in a periodic cycle through the server, and a 'queue insertion' mode is supported to conduct temporary charging power regulation and control. All piles of the whole charging station can be controlled at one time in a file mode, and the control system can trace back and is convenient to record and trace. Through the mode of stacking multiple files, the power limitation requirement of any time period in most practical operation can be conveniently met.
It should be understood that, although the steps in the flowcharts related to the embodiments as described above are sequentially displayed as indicated by arrows, the steps are not necessarily performed sequentially as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least a part of the steps in the flowcharts related to the embodiments described above may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, and the execution order of the steps or stages is not necessarily sequential, but may be performed alternately or alternately with other steps or at least a part of the steps or stages in other steps.
Based on the same inventive concept, the embodiment of the application also provides a charging pile output power control device for realizing the charging pile output power control method. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the method, so that specific limitations in one or more embodiments of the charging pile output power control device provided below can be referred to the limitations on the charging pile output power control method in the foregoing, and details are not repeated herein.
In one embodiment, as shown in fig. 6, there is provided a charging pile output power control apparatus including:
the file receiving module 610 is configured to receive a plurality of power control files associated with the target charging pile, which are sent by a server; the method comprises the steps that a plurality of power control files are generated for a server according to charging demand information of an area where a target charging pile is located, and each power control file is configured with output power limiting information and an initial priority;
a first filtering module 620, configured to determine, according to the output power limitation information, a plurality of candidate power control files associated with the target time period from among the power control files; the target time period is any effective time period;
a second filtering module 630, configured to determine, according to the output power limitation information and the initial priority of each candidate power control file, a target power control file to be executed in a target time period from the multiple candidate power control files;
the power determining module 640 determines the output power of the target charging pile in the target time period based on the output power limit information included in the target power control file.
In one embodiment, each power control file also contains a charging gun identification for the restricted charging gun; the second screening module 630, further comprising:
the type determining submodule is used for determining the control type corresponding to each candidate power control file according to at least one condition of the output power limiting information and the charging gun identification;
and the file determining submodule is used for determining a target power control file executed in a target time period from the plurality of candidate power control files according to the output power limit information, the initial priority and the control type of each candidate power control file.
In one embodiment, the output power limitation information includes limitation power and limitation time, and the control type includes: a maximum power control type, a cycle control type, and a temporary control type; the type determining submodule is further used for determining the control type of the candidate power control file as a maximum power control type when the charging gun identifications contained in the candidate power control file are identifications of all charging guns representing the target charging pile; when the limiting time contained in the candidate power control file is periodic, determining the control type of the candidate power control file as a cycle control type; and when the limiting power and the limiting time contained in the candidate power control file are temporary, determining the control type of the candidate power control file as a temporary control type.
In one embodiment, the file determining sub-module is further configured to classify each candidate power control file according to the control type to obtain a plurality of candidate file sets; aiming at each candidate file set, selecting a candidate power control file with the highest initial priority from the candidate file set according to the initial priority of each candidate power control file in the candidate file set; and determining a target power control file from the candidate power control file with the highest initial priority corresponding to each candidate file set according to the control type and the output power control information.
In one embodiment, the file determining sub-module is further configured to determine the target power control file from the candidate power control file with the highest initial priority corresponding to each candidate file set according to a condition that the priority of the temporary control type power control file is higher than that of the cyclic control type power control file and a condition that the priority of the power control file with the smaller limit power within the same limit time is higher.
In one embodiment, each power control file further has a corresponding control type, and the apparatus further includes a replacement module, configured to query the control type and the initial priority of a current power control file corresponding to the target charging pile; and if a second power control file which is the same as the control type and the initial priority of a first power control file in the received multiple power control files exists in the current power control file, replacing the second power control file with the first power control file.
In one embodiment, the limit time comprises an effective time and an end time of the power control file; the device also comprises a deleting module used for acquiring the limit time of the current power control file corresponding to the target charging pile; and deleting the invalid power control file when detecting that the invalid power control file exists in the current power control file according to the effective time and the termination time in the limit time.
All modules in the charging pile output power control device can be completely or partially realized through software, hardware and a combination of the software and the hardware. The modules can be embedded in a hardware form or independent of a processor in the charging pile, and can also be stored in a memory in the charging pile in a software form, so that the processor can call and execute the corresponding operation of the modules.
In one embodiment, a computer device is provided, which may be a server, the internal structure of which may be as shown in fig. 7. The computer device includes a processor, a memory, and a network interface connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The database of the computer equipment is used for storing data in the charging pile output power control process. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a charging post output power control method.
Those skilled in the art will appreciate that the architecture shown in fig. 7 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, there is also provided a charging pile including a memory and a processor, where the memory stores a computer program, and the processor executes the computer program to implement the steps of the above method embodiments.
In an embodiment, a computer-readable storage medium is provided, on which a computer program is stored which, when being executed by a processor, carries out the steps of the above-mentioned method embodiments.
In an embodiment, a computer program product is provided, comprising a computer program which, when being executed by a processor, carries out the steps of the above-mentioned method embodiments.
It should be noted that, the user information (including but not limited to user equipment information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, displayed data, etc.) referred to in the present application are information and data authorized by the user or sufficiently authorized by each party, and the collection, use and processing of the related data need to comply with the relevant laws and regulations and standards of the relevant country and region.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, database, or other medium used in the embodiments provided herein may include at least one of non-volatile and volatile memory. The nonvolatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, high-density embedded nonvolatile Memory, resistive Random Access Memory (ReRAM), magnetic Random Access Memory (MRAM), ferroelectric Random Access Memory (FRAM), phase Change Memory (PCM), graphene Memory, and the like. Volatile Memory can include Random Access Memory (RAM), external cache Memory, and the like. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others. The databases referred to in various embodiments provided herein may include at least one of relational and non-relational databases. The non-relational database may include, but is not limited to, a block chain based distributed database, and the like. The processors referred to in the embodiments provided herein may be general purpose processors, central processing units, graphics processors, digital signal processors, programmable logic devices, quantum computing based data processing logic devices, etc., without limitation.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.
Claims (10)
1. A charging pile output power control method is characterized by comprising the following steps:
receiving a plurality of power control files which are sent by a server and are associated with a target charging pile; the multiple power control files are generated by the server according to the charging demand information of the area where the target charging pile is located, each power control file is configured with output power limiting information and an initial priority, the target charging pile is any charging pile in any area, the power control files correspond to multiple control types, and the initial priority represents the priority of the power control files under the control types; the control type comprises a cycle control type;
determining a plurality of candidate power control files related to a target time period from the power control files according to the output power limit information; the target time period is any effective time period, and the output power limitation information comprises limitation time;
when the limiting time contained in the candidate power control file is periodic, determining that the control type of the candidate power control file is a cycle control type; determining a target power control file executed in the target time period from the plurality of candidate power control files according to the output power limit information, the initial priority and the control type of each candidate power control file;
and determining the output power of the target charging pile in the target time period based on the output power limit information contained in the target power control file.
2. The method of claim 1, wherein each power control file further contains a charging gun identification for the restricted charging gun; the method further comprises the following steps:
and determining the control type corresponding to each candidate power control file according to at least one condition of the output power limit information and the charging gun identifier.
3. The method of claim 2, wherein the output power limit information further comprises a limit power, and wherein the control type further comprises: a maximum power control type and a temporary control type;
determining the control type corresponding to each candidate power control file according to at least one condition of the output power limit information and the charging gun identifier, including:
when the charging gun identifications contained in the candidate power control file are identifications representing all charging guns of the target charging pile, determining that the control type of the candidate power control file is a maximum power control type;
and when the limiting power and the limiting time contained in the candidate power control file are temporary, determining that the control type of the candidate power control file is a temporary control type.
4. The method of claim 1, wherein determining a target power control file to be executed in the target time period from the plurality of candidate power control files according to the output power limitation information, the initial priority and the control type of each candidate power control file comprises:
classifying the candidate power control files according to the control types to obtain a plurality of candidate file sets;
aiming at each candidate file set, selecting a candidate power control file with the highest initial priority from the candidate file set according to the initial priority of each candidate power control file in the candidate file set;
and determining the target power control file from the candidate power control file with the highest initial priority corresponding to each candidate file set according to the control type and the output power control information.
5. The method according to claim 4, wherein the determining the target power control file from the candidate power control file with the highest initial priority corresponding to each candidate file set according to the control type and the output power control information comprises:
and determining the target power control file from the candidate power control file with the highest initial priority corresponding to each candidate file set according to the condition that the priority of the power control file of the temporary control type is higher than that of the power control file of the cyclic control type and the condition that the priority of the power control file with the smaller limiting power in the same limiting time is higher.
6. The method of claim 1, wherein each power control file further has a corresponding control type, and wherein receiving the plurality of power control files associated with the target charging post sent by the server further comprises:
inquiring the control type and the initial priority of a current power control file corresponding to the target charging pile;
and if a second power control file which is the same as the control type and the initial priority of a first power control file in the received multiple power control files exists in the current power control file, replacing the second power control file with the first power control file.
7. The method according to any of claims 1-6, wherein the output power limit information comprises a limit time, the limit time comprising an effective time and an end time of a power control file; the method further comprises the following steps:
acquiring the limit time of a current power control file corresponding to the target charging pile;
and deleting the invalid power control file when detecting that the invalid power control file exists in the current power control file according to the effective time and the termination time in the limit time.
8. A charging pile output power control apparatus, comprising:
the file receiving module is used for receiving a plurality of power control files which are sent by a server and are associated with the target charging pile; the multiple power control files are generated by the server according to the charging demand information of the area where the target charging pile is located, each power control file is configured with output power limiting information and an initial priority, the target charging pile is any charging pile in any area, the power control files correspond to multiple control types, and the initial priority represents the priority of the power control files under the control types; the control type comprises a cycle control type;
the first screening module is used for determining a plurality of candidate power control files related to a target time period from the power control files according to the output power limit information; the target time period is any effective time period, and the output power limitation information comprises limitation time;
the type determining module is used for determining the control type of the candidate power control file to be a cycle control type under the condition that the limiting time contained in the candidate power control file is periodic;
the second screening module is used for determining a target power control file executed in the target time period from the candidate power control files according to the output power limit information, the initial priority and the control type of each candidate power control file;
and the power determining module is used for determining the output power of the target charging pile in the target time period based on the output power limit information contained in the target power control file.
9. A charging pole comprising a memory and a processor, the memory storing a computer program, wherein the processor when executing the computer program performs the steps of the method of controlling the output power of the charging pole of any one of claims 1 to 7.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the charging pile output power control method according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310118307.0A CN115837855B (en) | 2023-02-15 | 2023-02-15 | Charging pile output power control method and device, charging pile and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310118307.0A CN115837855B (en) | 2023-02-15 | 2023-02-15 | Charging pile output power control method and device, charging pile and storage medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115837855A true CN115837855A (en) | 2023-03-24 |
| CN115837855B CN115837855B (en) | 2023-05-16 |
Family
ID=85579704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310118307.0A Active CN115837855B (en) | 2023-02-15 | 2023-02-15 | Charging pile output power control method and device, charging pile and storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115837855B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116090675A (en) * | 2023-04-10 | 2023-05-09 | 成都信息工程大学 | Short-time charging scheduling method based on combination of block chain and neural network |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103559567A (en) * | 2013-07-18 | 2014-02-05 | 南方电网科学研究院有限责任公司 | Management method of management system of power grid on electric vehicle charging station |
| CN109532549A (en) * | 2018-12-26 | 2019-03-29 | 深圳供电局有限公司 | Charge power method of adjustment, device, computer equipment and storage medium |
| CN111347910A (en) * | 2018-12-20 | 2020-06-30 | 中国电信股份有限公司 | Charging power distribution method, control cloud platform and system |
| CN112440806A (en) * | 2020-11-23 | 2021-03-05 | 南方电网调峰调频发电有限公司 | Power control method and device for charging pile, computer equipment and storage medium |
| CN114254912A (en) * | 2021-12-17 | 2022-03-29 | 深圳供电局有限公司 | Load control system and method for electric vehicle charging station |
| CN114447987A (en) * | 2022-03-30 | 2022-05-06 | 安徽明生恒卓科技有限公司 | New energy automobile charging management method for distributed photovoltaic power generation platform area |
-
2023
- 2023-02-15 CN CN202310118307.0A patent/CN115837855B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103559567A (en) * | 2013-07-18 | 2014-02-05 | 南方电网科学研究院有限责任公司 | Management method of management system of power grid on electric vehicle charging station |
| CN111347910A (en) * | 2018-12-20 | 2020-06-30 | 中国电信股份有限公司 | Charging power distribution method, control cloud platform and system |
| CN109532549A (en) * | 2018-12-26 | 2019-03-29 | 深圳供电局有限公司 | Charge power method of adjustment, device, computer equipment and storage medium |
| CN112440806A (en) * | 2020-11-23 | 2021-03-05 | 南方电网调峰调频发电有限公司 | Power control method and device for charging pile, computer equipment and storage medium |
| CN114254912A (en) * | 2021-12-17 | 2022-03-29 | 深圳供电局有限公司 | Load control system and method for electric vehicle charging station |
| CN114447987A (en) * | 2022-03-30 | 2022-05-06 | 安徽明生恒卓科技有限公司 | New energy automobile charging management method for distributed photovoltaic power generation platform area |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116090675A (en) * | 2023-04-10 | 2023-05-09 | 成都信息工程大学 | Short-time charging scheduling method based on combination of block chain and neural network |
| CN116090675B (en) * | 2023-04-10 | 2023-06-09 | 成都信息工程大学 | Short-time charging scheduling method based on combination of block chain and neural network |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115837855B (en) | 2023-05-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111506398B (en) | Task scheduling method and device, storage medium and electronic device | |
| CN115837855A (en) | Charging pile output power control method and device, charging pile and storage medium | |
| CN116362527B (en) | Vehicle scheduling method, device, computer equipment and storage medium | |
| CN110728432A (en) | Transport capacity scheduling method and device, electronic equipment and storage medium | |
| CN116974784A (en) | Task queue processing method and device, computer equipment and storage medium | |
| CN116204311A (en) | Pod cluster capacity expansion and contraction method and device, computer equipment and storage medium | |
| CN114691630B (en) | Smart supply chain big data sharing method and system | |
| CN113448747B (en) | Data transmission method, device, computer equipment and storage medium | |
| CN110990640B (en) | Data determination method, device, equipment and computer readable storage medium | |
| CN111090670A (en) | Data pre-polymerization method, system, computing equipment and storage medium | |
| CN115953010B (en) | Station location method, station location device and computer equipment | |
| CN115081233B (en) | Flow simulation method and electronic equipment | |
| CN116383208A (en) | Multi-time granularity data summarization method, device, equipment and storage medium | |
| CN112598312B (en) | Electric vehicle charging scheduling method and device based on longicorn stigma search algorithm | |
| CN117196598A (en) | Resource transfer method, device, computer equipment and storage medium | |
| CN117827760A (en) | Hadoop file dividing method, device, equipment and storage medium | |
| CN114691335A (en) | Task scheduling processing method and device, computer equipment and storage medium | |
| CN114896457A (en) | Generation method, device, equipment and storage medium of electric carbon database | |
| CN114338601A (en) | Unknown domain name identification method, computer equipment and storage medium | |
| CN113434492A (en) | Data detection method and device, storage medium and electronic device | |
| CN118012618A (en) | Interface request scheduling method and device, computer equipment and storage medium | |
| CN117252621A (en) | Price prediction method, device, equipment and storage medium | |
| CN113919903A (en) | Method and device for determining resource information, server and storage medium | |
| CN118227571A (en) | File repartition method, device, equipment and storage medium | |
| CN115695437A (en) | Resource scheduling method, electronic device, and computer storage medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 511458 room 409-a156, a157, No. 1, Mingzhu 1st Street, Hengli Town, Nansha District, Guangzhou City, Guangdong Province Patentee after: China Southern Power Grid Industry Investment Group Co.,Ltd. Patentee after: Southern Power Grid Electric Vehicle Service Co.,Ltd. Patentee after: Yonglian Technology (Changshu) Co.,Ltd. Address before: 511458 room 409-a156, a157, No. 1, Mingzhu 1st Street, Hengli Town, Nansha District, Guangzhou City, Guangdong Province Patentee before: China Southern Power Grid Industry Investment Group Co.,Ltd. Patentee before: Southern Power Grid Electric Vehicle Service Co.,Ltd. Patentee before: Yonglian smart energy technology (Changshu) Co.,Ltd. |