CN113815466A - Charging pile output control method and device - Google Patents
Charging pile output control method and device Download PDFInfo
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- CN113815466A CN113815466A CN202111296434.7A CN202111296434A CN113815466A CN 113815466 A CN113815466 A CN 113815466A CN 202111296434 A CN202111296434 A CN 202111296434A CN 113815466 A CN113815466 A CN 113815466A
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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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- 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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Abstract
The application discloses a charging pile output control method and device. Wherein, the method comprises the following steps: acquiring first electric quantity demand information of a target vehicle; the method comprises the steps that first output electric quantity information of a target charging gun is obtained through first equipment in a charging pile, and/or second output electric quantity information of the target charging gun is obtained through second equipment in the charging pile, wherein the target charging gun is used for charging a target vehicle; and adjusting the first actual output electric quantity of the target charging gun according to the first electric quantity demand information, the first output electric quantity information and/or the second output electric quantity information. The output precision that fills electric pile among the correlation technique is difficult to control, can increase the technical problem of cost again when introducing high accuracy sampling equipment has been solved in this application.
Description
Technical Field
The application relates to the technical field of direct-current charging piles, in particular to a charging pile output control method and device.
Background
For traditional direct current charging pile, the output precision, such as the precision of output voltage, output current or output power, completely depends on the output precision of a charging pile internal power conversion module, the output precision of the power conversion module depends on the voltage and current sampling of a single charging module in the module, and when a plurality of charging modules are connected in parallel for output, the problem of large total output error can occur, so that potential safety hazards are caused. If the voltage and current sampling with high precision is to be realized, a high-precision sampling device is often required to be additionally installed, but the hardware cost is increased.
In view of the above problems, no effective solution has been proposed.
Disclosure of Invention
The embodiment of the application provides a charging pile output control method and device, and the technical problems that in the related art, the output precision of a charging pile is difficult to control, and the cost is increased when high-precision sampling equipment is introduced are at least solved.
According to an aspect of an embodiment of the present application, there is provided a charging pile output control method, including: acquiring first electric quantity demand information of a target vehicle; acquiring first output electric quantity information of a target charging gun through first equipment in a charging pile, and/or acquiring second output electric quantity information of the target charging gun through second equipment in the charging pile, wherein the target charging gun is used for charging a target vehicle; and adjusting the first actual output electric quantity of the target charging gun according to the first electric quantity demand information, the first output electric quantity information and/or the second output electric quantity information.
Optionally, determining first actual output electric quantity information of the target charging gun according to the first output electric quantity information and/or the second output electric quantity information; and adjusting the first actual output electric quantity of the target charging gun according to the first electric quantity demand information and the first actual output electric quantity information.
Optionally, detecting the working states of the first device and the second device; when the working state of the first equipment is normal and the working state of the second equipment is abnormal, determining the first actual output electric quantity information according to the first output electric quantity information; when the working state of the first equipment is abnormal and the working state of the second equipment is normal, determining the first actual output electric quantity information according to the second output electric quantity information; and when the working state of the first equipment is normal and the working state of the second equipment is normal, performing weighted average calculation on the first output electric quantity information and the second output electric quantity information according to a preset weight coefficient to obtain a calculation result, and determining the first actual output electric quantity information according to the calculation result.
Optionally, a first actual output electric quantity of the target charging gun is a sum of second actual output electric quantities of at least one power sub-module corresponding to the target charging gun, and first electric quantity error information of the target charging gun is determined according to the first electric quantity demand information and the first actual output electric quantity information; adjusting the first electric quantity error information through an adjuster to obtain a first adjustment result, and summing the first adjustment result and the first electric quantity demand information to obtain a first target output electric quantity of the target charging gun; for any power sub-module, determining a second target output electric quantity of the power sub-module according to the first target output electric quantity; and adjusting the second actual output electric quantity of the power sub-module according to the second target output electric quantity of the power sub-module.
Optionally, a first actual output electric quantity of the target charging gun is the sum of second actual output electric quantities of at least one power sub-module corresponding to the target charging gun, and for any one power sub-module, second electric quantity error information of the power sub-module is determined according to the first electric quantity demand information and the first actual output electric quantity information, and second electric quantity demand information of the power sub-module is determined; adjusting the second electric quantity error information through an adjuster to obtain a second adjustment result, and summing the second adjustment result and the second electric quantity demand information to obtain a second target output electric quantity of the power submodule; and adjusting the second actual output electric quantity of the power sub-module according to the second target output electric quantity of the power sub-module.
Optionally, for any one of the power sub-modules, obtaining the second actual output electric quantity of the power sub-module; determining third electric quantity error information of the power sub-module according to the second actual output electric quantity and the second target output electric quantity of the power sub-module; and adjusting the third electric quantity error information through an adjuster to obtain a third adjustment result, and adjusting the second actual output electric quantity of the power sub-module according to the third adjustment result.
Optionally, establishing a communication connection with the target vehicle; acquiring the first electric quantity demand information sent by the target vehicle, wherein the first electric quantity demand information at least comprises one of the following information: voltage demand information, current demand information, power demand information.
Optionally, the first device is a main controller in the charging pile, and the second device is an electric meter in the charging pile.
According to another aspect of the embodiments of the present application, there is also provided a charging pile output control apparatus, including: the first acquisition module is used for acquiring first electric quantity demand information of a target vehicle; the second acquisition module is used for acquiring first output electric quantity information of a target charging gun through first equipment in a charging pile, and/or acquiring second output electric quantity information of the target charging gun through second equipment in the charging pile, wherein the target charging gun is used for charging the target vehicle; and the determining module is used for adjusting the first actual output electric quantity of the target charging gun according to the first electric quantity demand information, the first output electric quantity information and/or the second output electric quantity information.
According to another aspect of the embodiment of the application, a nonvolatile storage medium is further provided, where the nonvolatile storage medium includes a stored program, and when the program runs, the apparatus where the nonvolatile storage medium is located is controlled to execute the charging pile output control method.
In the embodiment of the application, first electric quantity demand information of a target vehicle is firstly acquired, then first output electric quantity information of a target charging gun is acquired through first equipment in a charging pile, and/or second output electric quantity information of the target charging gun is acquired through second equipment in the charging pile, wherein the target charging gun is used for charging the target vehicle; and adjusting the first actual output electric quantity of the target charging gun according to the first electric quantity demand information, the first output electric quantity information and/or the second output electric quantity information. In the process, the output voltage and current of the charging gun are directly sampled through the first device and/or the second device integrated in the charging pile, so that additional cost of other hardware is not needed; through directly or indirectly regarding this sampling result as feedback signal, combine first electric quantity demand information to adjust the output electric quantity of each power submodule piece, can improve the output accuracy of each power submodule piece to improve whole pile output accuracy, and then solved and filled the output accuracy of electric pile among the correlation technique and difficult to control, can increase the technical problem of cost when introducing high accuracy sampling equipment.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a schematic flowchart of a charging pile output control method according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a dc charging pile according to an embodiment of the present application;
fig. 3 is a schematic diagram of charging pile power module error compensation according to an embodiment of the application;
fig. 4 is a schematic diagram of another charging pile power module error compensation according to an embodiment of the application;
fig. 5 is a schematic structural diagram of a charging pile output control device according to an embodiment of the application.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of 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. Furthermore, the terms "comprises," "comprising," and any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
In accordance with an embodiment of the present application, there is provided a charging pile output control method, it should be noted that the steps shown in the flowchart of the drawings may be executed in a computer system such as a set of computer executable instructions, and that although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in an order different from that here.
Fig. 1 is a schematic flowchart of an alternative charging pile output control method according to an embodiment of the present application, and as shown in fig. 1, the method at least includes steps S102 to S106, where:
step S102, first electric quantity demand information of the target vehicle is obtained.
Specifically, the charging pile firstly establishes a communication connection with the target vehicle, and then acquires first electric quantity demand information sent by the target vehicle, wherein the first electric quantity demand information at least comprises one of the following information: voltage demand information, current demand information, power demand information. Wherein, fill electric pile mainly for the direct current and fill electric pile in this application embodiment, after waiting to charge target vehicle and fill electric pile and establish connection, can will charge required voltage, electric current or information transmission such as power to fill electric pile, by filling electric pile output corresponding voltage, electric current or power.
And S104, acquiring first output electric quantity information of a target charging gun through first equipment in the charging pile, and/or acquiring second output electric quantity information of the target charging gun through second equipment in the charging pile, wherein the target charging gun is used for charging a target vehicle.
In some optional embodiments of the present application, the first device is a main controller in the charging pile, and the second device is an electric meter in the charging pile. Of course, the first device and the second device may also be other devices integrated in the charging pile and capable of acquiring information of the output electric quantity of the target charging gun, and this is not limited specifically here.
Fig. 2 shows an alternative dc charging pile with a dual-gun structure, in which the charging pile includes an input switch, a power module, a power distribution switch combination, a main controller, an electricity meter, a charging gun a and a charging gun B, a solid line in the drawing indicates a power bus, and a dotted line indicates a communication bus. Generally, the power module includes at least one power sub-module, and the output power of the power sub-module is distributed by the power distribution switch combination, and then the vehicle to be charged is charged through the charging gun.
In the related art, the final output precision of the charging gun, such as the precision of output voltage, output current or output power, completely depends on the output precision of the power module, the output precision of the power module depends on the voltage and current sampling inside each power sub-module, the sampling precision is low, when a plurality of power sub-modules are connected in parallel for output, the total output error is large, and the actual output precision of the charging gun is difficult to meet the requirements of users.
In order to solve the above problem, the embodiment of the present application provides that the output electric quantity information of the charging gun is collected through the first device and/or the second device in the charging pile, and the output electric quantity information mainly includes output voltage and output current. Specifically, as shown in fig. 2, the output voltage and current of the charging gun are sampled separately by the main controller and the electric meter, wherein the sampling process speed of the main controller is high, the sampling precision of the electric meter is high, the main controller and the electric meter can both acquire the total voltage and the total current actually output by the charging gun, the sampling results of the main controller and the electric meter are processed separately or in combination, the sampling results are used as the feedback values of the actual output of the charging gun, and then based on the error compensation principle, the output voltage, the current or the power of each power sub-module are adjusted, the output precision of each power sub-module can be improved, and therefore the overall output precision of the charging gun is improved. Meanwhile, other high-precision sampling equipment is not required to be introduced in the process, so that the hardware cost is further saved.
And step S106, adjusting the first actual output electric quantity of the target charging gun according to the first electric quantity demand information, the first output electric quantity information and/or the second output electric quantity information.
Specifically, when the first actual output electric quantity of the target charging gun is adjusted based on the error compensation principle, the first actual output electric quantity information of the target charging gun may be determined according to the first output electric quantity information acquired by the first device and/or the second output electric quantity information acquired by the second device.
In some optional embodiments of the present application, the working states of the first device and the second device may be detected first. For example, whether the first device or the second device collects the output voltage and current of the charging gun is detected, and if the collection result is not obtained, the working state of the first device or the second device is abnormal; after the acquisition result is obtained, whether the acquisition result is within a reasonable range or not can be further judged, and if the acquisition result is not within the reasonable range, the working state of the first equipment or the second equipment is abnormal; and if the acquisition result is within a reasonable range, the working state of the first equipment or the second equipment is considered to be normal.
Specifically, when the working state of the first device is normal and the working state of the second device is abnormal, determining first actual output electric quantity information according to the first output electric quantity information; when the working state of the first equipment is abnormal and the working state of the second equipment is normal, determining first actual output electric quantity information according to the second output electric quantity information; when the working state of the first equipment is normal and the working state of the second equipment is normal, carrying out weighted average calculation on the first output electric quantity information and the second output electric quantity information according to a preset weight coefficient to obtain a calculation result, and determining first actual output electric quantity information according to the calculation result. The value range of the preset weight coefficient is between 0 and 1, and the value range can be specifically set according to the actual sampling precision of the first device and the second device.
According to the method, through judging the working states of the first equipment and the second equipment, when one of the first equipment and the second equipment has a sampling fault or has a large sampling precision error, the sampling result of the other equipment can be adopted to adjust subsequent output electric quantity, and the robustness of a charging pile output system is improved while the calculation result error is prevented from being large. Of course, when both are normal, the user may also use only one of the devices for acquisition, or set the weight coefficient of the acquisition result of one device to 0, and use only the acquisition result of the other device for subsequent adjustment.
And then, adjusting the first actual output electric quantity of the target charging gun based on an error compensation principle according to the first electric quantity demand information and the first actual output electric quantity information. As can be seen from the above, the first actual output electric quantity of the target charging gun is the sum of the second actual output electric quantities of the at least one power sub-module corresponding to the target charging gun, so that, when error compensation is implemented, the following two alternative ways are provided in the embodiments of the present application.
In a first manner, the compensated total voltage or total current or total power is determined by the first device, that is, a first target output electric quantity of the target charging gun is determined, then the compensated total voltage or total current or total power is equally divided to the corresponding at least one power sub-module, the given voltage or the given current or the given power is re-issued for each power sub-module, that is, a second target output electric quantity of each power sub-module is determined, and the output voltage or the current or the power of each power sub-module is adjusted by each power sub-module.
Specifically, first electric quantity error information of the target charging gun can be determined according to the first electric quantity demand information and the first actual output electric quantity information; adjusting the first electric quantity error information through an adjuster to obtain a first adjusting result, and summing the first adjusting result and the first electric quantity demand information to obtain a first target output electric quantity of the target charging gun; for any power sub-module, determining a second target output electric quantity of the power sub-module according to the first target output electric quantity; and adjusting a second actual output electric quantity of the power sub-module according to a second target output electric quantity of the power sub-module.
Taking the example of adjusting the output current of the charging gun a, as shown in fig. 3, the current output current (first output electric quantity information) of the charging gun a obtained by the first device is iA1The current output current (second output power information) of the charging gun a acquired by the second device is iA2If the preset weight coefficient is K, determining that the current actual output current (first actual output electric quantity information) of the charging gun A is iA＝KiA1+(1-K)iA2The current (first electric quantity demand information) requested to be output by the vehicle is iA_refThe difference between the two is used to obtain the error current (first electric quantity error information) iA_err＝iA_ref-iA(ii) a Error current i is adjusted by PI (proportional integral) regulatorA_errAfter processing, the current is then compared with the request current iA_refSumming to obtain the compensated total current (first target output electric quantity) iA_ref *(ii) a Assuming that charging gun A corresponds to n (n ≧ 1) power sub-modules, the total given current i can be setA_ref *Equally dividing the current to the n power sub-modules, namely determining the new given current (second target output electric quantity) of each power sub-module as
Then, each power sub-module adjusts the actual output current (second actual output electric quantity) according to the new given current, and the precision control of the output current of the charging gun A can be realized.
It will be understood that the output voltage is regulated in the same way as the output current, whereas when the input power is regulated, the voltage and current are collected at the same time, and the corresponding power is determined by the voltage and current.
When the second actual output electric quantity of each power sub-module is adjusted according to the second target output electric quantity of each power sub-module, acquiring the second actual output electric quantity of each power sub-module for any power sub-module; determining third electric quantity error information of the power sub-module according to the second actual output electric quantity and a second target output electric quantity of the power sub-module; and adjusting the third electric quantity error information through the adjuster to obtain a third adjustment result, and adjusting a second actual output electric quantity of the power submodule according to the third adjustment result.
Taking the example of adjusting the output current of the power sub-module 1, as shown in fig. 3, the given current (the second target output electric quantity) of the power sub-module 1 is i1_refObtaining the current output current (second actual output electric quantity) as i1The difference between the two is used to obtain the error current (the third electric quantity error information) i1_err *＝i1_ref-i1(ii) a Error current i through PI regulator1_err *After the processing, the controller of the power sub-module 1 controls the power devices in the power sub-module 1 to act according to the processing result so as to adjust the output current (the second actual output electric quantity) of the power sub-module 1.
In a second mode, the first device directly issues the current actual output voltage or current or power (i.e., the first actual output electric quantity information) and the voltage or current or power requested by the vehicle (i.e., the first electric quantity demand information) to the corresponding at least one power sub-module, and each power sub-module calculates the voltage or current to be compensated.
Specifically, for any power sub-module, second electric quantity error information of the power sub-module is determined according to first electric quantity demand information and first actual output electric quantity information, and second electric quantity demand information of the power sub-module is determined; adjusting the second electric quantity error information through the adjuster to obtain a second adjustment result, and summing the second adjustment result and the second electric quantity demand information to obtain a second target output electric quantity of the power submodule; and adjusting a second actual output electric quantity of the power sub-module according to a second target output electric quantity of the power sub-module.
Still taking the example of adjusting the output current of the charging gun a as an example, as shown in fig. 4, the current output current (first output electric quantity information) of the charging gun a obtained by the first device is iA1The current output current (second output electric quantity information) of the charging gun A acquired by the second device isiA2If the preset weight coefficient is K, determining that the current actual output current (first actual output electric quantity information) of the charging gun A is iA＝KiA1+(1-K)iA2The current (first electric quantity demand information) requested to be output by the vehicle is iA_refThe actual output current i is transmitted via the communication busAAnd request current iA_refAnd sending the signals to n (n is more than or equal to 1) power sub-modules corresponding to the charging gun A.
For the n power sub-modules, taking power sub-module 1 as an example, the initial given current (second electric quantity demand information) is determined as
Its error current (second quantity error information)
Error current i through PI regulator1_errAfter treatment, the current is again compared with the initial given current i1_refSumming to obtain a compensated given current (second target output electric quantity) i1_ref *(ii) a Then obtaining the current output current (second actual output electric quantity) as i1The difference between the two is used to obtain the error current (the third electric quantity error information) i1_err *＝i1_ref *-i1(ii) a Error current i through PI regulator1_err *After the processing, the controller of the power sub-module 1 controls the power devices in the power sub-module 1 to act according to the processing result so as to adjust the output current (the second actual output electric quantity) of the power sub-module 1.
It should be noted that the regulator applied in fig. 3 and 4 is a PI regulator, which is only an example and is not limited, and in the actual regulation process, a PID (proportional integral derivative) regulator or another regulator may be selected as needed to process the electric quantity error information.
In the embodiment of the application, first electric quantity demand information of a target vehicle is firstly acquired, then first output electric quantity information of a target charging gun is acquired through first equipment in a charging pile, and/or second output electric quantity information of the target charging gun is acquired through second equipment in the charging pile, wherein the target charging gun is used for charging the target vehicle; and adjusting the first actual output electric quantity of the target charging gun according to the first electric quantity demand information, the first output electric quantity information and/or the second output electric quantity information. In the process, the output voltage and current of the charging gun are directly sampled through the first device and/or the second device integrated in the charging pile, so that additional cost of other hardware is not needed; through directly or indirectly regarding this sampling result as feedback signal, combine first electric quantity demand information to adjust the output electric quantity of each power submodule piece, can improve the output accuracy of each power submodule piece to improve whole pile output accuracy, and then solved and filled the output accuracy of electric pile among the correlation technique and difficult to control, can increase the technical problem of cost when introducing high accuracy sampling equipment.
Example 2
According to an embodiment of the present application, there is also provided a charging pile output control apparatus for implementing the charging pile output control method, as shown in fig. 5, the apparatus at least includes a first obtaining module 50, a second obtaining module 52, and a determining module 54, where:
the first obtaining module 50 is configured to obtain first electric quantity demand information of the target vehicle.
Specifically, the charging pile firstly establishes a communication connection with the target vehicle, and then acquires first electric quantity demand information sent by the target vehicle, wherein the first electric quantity demand information at least comprises one of the following information: voltage demand information, current demand information, power demand information. Wherein, fill electric pile mainly for the direct current and fill electric pile in this application embodiment, after waiting to charge target vehicle and fill electric pile and establish connection, can will charge required voltage, electric current or information transmission such as power to fill electric pile, by filling electric pile output corresponding voltage, electric current or power.
The second obtaining module 52 is configured to obtain first output power information of the target charging gun through a first device in the charging pile, and/or obtain second output power information of the target charging gun through a second device in the charging pile, where the target charging gun is used to charge the target vehicle.
In some optional embodiments of the present application, the first device is a main controller in the charging pile, and the second device is an electric meter in the charging pile. Of course, the first device and the second device may also be other devices integrated in the charging pile and capable of acquiring information of the output electric quantity of the target charging gun, and this is not limited specifically here.
In the related art, the final output precision of the charging gun, such as the precision of output voltage, output current or output power, completely depends on the output precision of the power module, the output precision of the power module depends on the voltage and current sampling inside each power sub-module, the sampling precision is low, when a plurality of power sub-modules are connected in parallel for output, the total output error is large, and the actual output precision of the charging gun is difficult to meet the requirements of users.
In order to solve the above problem, the embodiment of the present application provides that the output electric quantity information of the charging gun is collected through the first device and/or the second device in the charging pile, and the output electric quantity information mainly includes output voltage and output current. Specifically, as shown in fig. 2, the output voltage and current of the charging gun are sampled separately by the main controller and the electric meter, wherein the sampling process speed of the main controller is high, the sampling precision of the electric meter is high, the main controller and the electric meter can both acquire the total voltage and the total current actually output by the charging gun, the sampling results of the main controller and the electric meter are processed separately or in combination, the sampling results are used as the feedback values of the actual output of the charging gun, and then based on the error compensation principle, the output voltage, the current or the power of each power sub-module are adjusted, the output precision of each power sub-module can be improved, and therefore the overall output precision of the charging gun is improved. Meanwhile, other high-precision sampling equipment is not required to be introduced in the process, so that the hardware cost is further saved.
The determining module 54 is configured to adjust the first actual output electric quantity of the target charging gun according to the first electric quantity demand information, the first output electric quantity information, and/or the second output electric quantity information.
Specifically, when the first actual output electric quantity of the target charging gun is adjusted based on the error compensation principle, the first actual output electric quantity information of the target charging gun may be determined according to the first output electric quantity information acquired by the first device and/or the second output electric quantity information acquired by the second device.
In some optional embodiments of the present application, the working states of the first device and the second device may be detected first. For example, whether the first device or the second device collects the output voltage and current of the charging gun is detected, and if the collection result is not obtained, the working state of the first device or the second device is abnormal; after the acquisition result is obtained, whether the acquisition result is within a reasonable range or not can be further judged, and if the acquisition result is not within the reasonable range, the working state of the first equipment or the second equipment is abnormal; and if the acquisition result is within a reasonable range, the working state of the first equipment or the second equipment is considered to be normal.
Specifically, when the working state of the first device is normal and the working state of the second device is abnormal, determining first actual output electric quantity information according to the first output electric quantity information; when the working state of the first equipment is abnormal and the working state of the second equipment is normal, determining first actual output electric quantity information according to the second output electric quantity information; when the working state of the first equipment is normal and the working state of the second equipment is normal, carrying out weighted average calculation on the first output electric quantity information and the second output electric quantity information according to a preset weight coefficient to obtain a calculation result, and determining first actual output electric quantity information according to the calculation result. The value range of the preset weight coefficient is between 0 and 1, and the value range can be specifically set according to the actual sampling precision of the first device and the second device.
According to the method, through judging the working states of the first equipment and the second equipment, when one of the first equipment and the second equipment has a sampling fault or has a large sampling precision error, the sampling result of the other equipment can be adopted to adjust subsequent output electric quantity, and the robustness of a charging pile output system is improved while the calculation result error is prevented from being large. Of course, when both are normal, the user may also use only one of the devices for acquisition, or set the weight coefficient of the acquisition result of one device to 0, and use only the acquisition result of the other device for subsequent adjustment.
And then, adjusting the first actual output electric quantity of the target charging gun based on an error compensation principle according to the first electric quantity demand information and the first actual output electric quantity information. As can be seen from the above, the first actual output electric quantity of the target charging gun is the sum of the second actual output electric quantities of the at least one power sub-module corresponding to the target charging gun, so that, when error compensation is implemented, the following two alternative ways are provided in the embodiments of the present application.
In a first manner, the compensated total voltage or total current or total power is determined by the first device, that is, a first target output electric quantity of the target charging gun is determined, then the compensated total voltage or total current or total power is equally divided to the corresponding at least one power sub-module, the given voltage or the given current or the given power is re-issued for each power sub-module, that is, a second target output electric quantity of each power sub-module is determined, and the output voltage or the current or the power of each power sub-module is adjusted by each power sub-module.
Specifically, first electric quantity error information of the target charging gun can be determined according to the first electric quantity demand information and the first actual output electric quantity information; adjusting the first electric quantity error information through an adjuster to obtain a first adjusting result, and summing the first adjusting result and the first electric quantity demand information to obtain a first target output electric quantity of the target charging gun; for any power sub-module, determining a second target output electric quantity of the power sub-module according to the first target output electric quantity; and adjusting a second actual output electric quantity of the power sub-module according to a second target output electric quantity of the power sub-module.
Taking the example of adjusting the output current of the charging gun a, as shown in fig. 3, the current output current (first output electric quantity information) of the charging gun a obtained by the first device is iA1The current output current (second output power information) of the charging gun a acquired by the second device is iA2If the preset weight coefficient is K, the current actual output current (first actual output electric quantity information) of the charging gun a is determined to be KiA＝KiA1+(1-K)iA2The current (first electric quantity demand information) requested to be output by the vehicle is iA_refThe difference between the two is used to obtain the error current (first electric quantity error information) iA_err＝iA_ref-iA(ii) a Error current i is adjusted by PI (proportional integral) regulatorA_errAfter processing, the current is then compared with the request current iA_refSumming to obtain the compensated total current (first target output electric quantity) iA_ref *(ii) a Assuming that charging gun A corresponds to n (n ≧ 1) power sub-modules, the total given current i can be setA_ref *Equally dividing the current to the n power sub-modules, namely determining the new given current (second target output electric quantity) of each power sub-module as
Then, each power sub-module adjusts the actual output current (second actual output electric quantity) according to the new given current, and the precision control of the output current of the charging gun A can be realized.
It will be understood that the output voltage is regulated in the same way as the output current, whereas when the input power is regulated, the voltage and current are collected at the same time, and the corresponding power is determined by the voltage and current.
When the second actual output electric quantity of each power sub-module is adjusted according to the second target output electric quantity of each power sub-module, acquiring the second actual output electric quantity of each power sub-module for any power sub-module; determining third electric quantity error information of the power sub-module according to the second actual output electric quantity and a second target output electric quantity of the power sub-module; and adjusting the third electric quantity error information through the adjuster to obtain a third adjustment result, and adjusting a second actual output electric quantity of the power submodule according to the third adjustment result.
Taking the example of adjusting the output current of the power sub-module 1, as shown in fig. 3, the given current (the second target output electric quantity) of the power sub-module 1 is i1_refObtaining the current output current (second actual output electric quantity) as i1The difference between the two is used to obtain the error current (thirdPower error information) is i1_err *＝i1_ref-i1(ii) a Error current i through PI regulator1_err *After the processing, the controller of the power sub-module 1 controls the power devices in the power sub-module 1 to act according to the processing result so as to adjust the output current (the second actual output electric quantity) of the power sub-module 1.
In a second mode, the first device directly issues the current actual output voltage or current or power (i.e., the first actual output electric quantity information) and the voltage or current or power requested by the vehicle (i.e., the first electric quantity demand information) to the corresponding at least one power sub-module, and each power sub-module calculates the voltage or current to be compensated.
Specifically, for any power sub-module, second electric quantity error information of the power sub-module is determined according to first electric quantity demand information and first actual output electric quantity information, and second electric quantity demand information of the power sub-module is determined; adjusting the second electric quantity error information through the adjuster to obtain a second adjustment result, and summing the second adjustment result and the second electric quantity demand information to obtain a second target output electric quantity of the power submodule; and adjusting a second actual output electric quantity of the power sub-module according to a second target output electric quantity of the power sub-module.
Still taking the example of adjusting the output current of the charging gun a as an example, as shown in fig. 4, the current output current (first output electric quantity information) of the charging gun a obtained by the first device is iA1The current output current (second output power information) of the charging gun a acquired by the second device is iA2If the preset weight coefficient is K, determining that the current actual output current (first actual output electric quantity information) of the charging gun A is iA＝KiA1+(1-K)iA2The current (first electric quantity demand information) requested to be output by the vehicle is iA_refThe actual output current i is transmitted via the communication busAAnd request current iA_refAnd sending the signals to n (n is more than or equal to 1) power sub-modules corresponding to the charging gun A.
For the n power sub-modules, taking power sub-module 1 as an example, the initial given current (second charge demand signal) is first determinedInformation) is
Its error current (second quantity error information)
Error current i through PI regulator1_errAfter treatment, the current is again compared with the initial given current i1_refSumming to obtain a compensated given current (second target output electric quantity) i1_ref *(ii) a Then obtaining the current output current (second actual output electric quantity) as i1The difference between the two is used to obtain the error current (the third electric quantity error information) i1_err *＝i1_ref *-i1(ii) a Error current i through PI regulator1_err *After the processing, the controller of the power sub-module 1 controls the power devices in the power sub-module 1 to act according to the processing result so as to adjust the output current (the second actual output electric quantity) of the power sub-module 1.
It should be noted that the regulator applied in fig. 3 and 4 is a PI regulator, which is only an example and is not limited, and in the actual regulation process, a PID (proportional integral derivative) regulator or another regulator may be selected as needed to process the electric quantity error information.
It should be noted that, in the embodiment of the present application, each module in the charging pile output control device corresponds to the implementation steps of the charging pile output control method in embodiment 1 one to one, and since the detailed description is already performed in embodiment 1, some details that are not shown in this embodiment may refer to embodiment 1, and are not described herein again.
Example 3
According to the embodiment of the application, a nonvolatile storage medium is further provided, and the nonvolatile storage medium comprises a stored program, wherein the device where the nonvolatile storage medium is located is controlled to execute the charging pile output control method when the program runs.
Specifically, the device in which the nonvolatile storage medium is controlled to execute the following steps when the program runs: acquiring first electric quantity demand information of a target vehicle; the method comprises the steps that first output electric quantity information of a target charging gun is obtained through first equipment in a charging pile, and/or second output electric quantity information of the target charging gun is obtained through second equipment in the charging pile, wherein the target charging gun is used for charging a target vehicle; and adjusting the first actual output electric quantity of the target charging gun according to the first electric quantity demand information, the first output electric quantity information and/or the second output electric quantity information.
The above-mentioned serial numbers of the embodiments of the present application are merely for description and do not represent the merits of the embodiments.
In the above embodiments of the present application, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, a division of a unit may be a division of a logic function, and an actual implementation may have another division, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or may not be executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method of the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The foregoing is only a preferred embodiment of the present application and it should be noted that those skilled in the art can make several improvements and modifications without departing from the principle of the present application, and these improvements and modifications should also be considered as the protection scope of the present application.
Claims (10)
1. A charging pile output control method is characterized by comprising the following steps:
acquiring first electric quantity demand information of a target vehicle;
acquiring first output electric quantity information of a target charging gun through first equipment in a charging pile, and/or acquiring second output electric quantity information of the target charging gun through second equipment in the charging pile, wherein the target charging gun is used for charging a target vehicle;
and adjusting the first actual output electric quantity of the target charging gun according to the first electric quantity demand information, the first output electric quantity information and/or the second output electric quantity information.
2. The method of claim 1, wherein adjusting the first actual output power of the target charging gun according to the first power demand information, the first output power information, and/or the second output power information comprises:
determining first actual output electric quantity information of the target charging gun according to the first output electric quantity information and/or the second output electric quantity information;
and adjusting the first actual output electric quantity of the target charging gun according to the first electric quantity demand information and the first actual output electric quantity information.
3. The method according to claim 2, wherein determining first actual output power information of the target charging gun according to the first output power information and/or the second output power information comprises:
detecting the working states of the first equipment and the second equipment;
when the working state of the first equipment is normal and the working state of the second equipment is abnormal, determining the first actual output electric quantity information according to the first output electric quantity information;
when the working state of the first equipment is abnormal and the working state of the second equipment is normal, determining the first actual output electric quantity information according to the second output electric quantity information;
and when the working state of the first equipment is normal and the working state of the second equipment is normal, performing weighted average calculation on the first output electric quantity information and the second output electric quantity information according to a preset weight coefficient to obtain a calculation result, and determining the first actual output electric quantity information according to the calculation result.
4. The method of claim 2, wherein the first actual output power of the target charging gun is a sum of second actual output powers of at least one power sub-module corresponding to the target charging gun, and the adjusting the first actual output power of the target charging gun according to the first power demand information and the first actual output power information comprises:
determining first electric quantity error information of the target charging gun according to the first electric quantity demand information and the first actual output electric quantity information;
adjusting the first electric quantity error information through an adjuster to obtain a first adjustment result, and summing the first adjustment result and the first electric quantity demand information to obtain a first target output electric quantity of the target charging gun;
for any power sub-module, determining a second target output electric quantity of the power sub-module according to the first target output electric quantity;
and adjusting the second actual output electric quantity of the power sub-module according to the second target output electric quantity of the power sub-module.
5. The method of claim 2, wherein the first actual output power of the target charging gun is a sum of second actual output powers of at least one power sub-module corresponding to the target charging gun, and the adjusting the first actual output power of the target charging gun according to the first power demand information and the first actual output power information comprises:
for any power sub-module, determining second electric quantity error information of the power sub-module according to the first electric quantity demand information and the first actual output electric quantity information, and determining second electric quantity demand information of the power sub-module;
adjusting the second electric quantity error information through an adjuster to obtain a second adjustment result, and summing the second adjustment result and the second electric quantity demand information to obtain a second target output electric quantity of the power submodule;
and adjusting the second actual output electric quantity of the power sub-module according to the second target output electric quantity of the power sub-module.
6. The method according to any one of claims 4 or 5, wherein adjusting the second actual output power of the power sub-module in accordance with the second target output power of the power sub-module comprises:
for any power sub-module, acquiring the second actual output electric quantity of the power sub-module;
determining third electric quantity error information of the power sub-module according to the second actual output electric quantity and the second target output electric quantity of the power sub-module;
and adjusting the third electric quantity error information through an adjuster to obtain a third adjustment result, and adjusting the second actual output electric quantity of the power sub-module according to the third adjustment result.
7. The method of claim 1, wherein obtaining first power demand information for a target vehicle comprises:
establishing a communication connection with the target vehicle;
acquiring the first electric quantity demand information sent by the target vehicle, wherein the first electric quantity demand information at least comprises one of the following information: voltage demand information, current demand information, power demand information.
8. The method of claim 1, wherein the first device is a master controller in the charging pole and the second device is an electric meter in the charging pole.
9. An output control device for a charging pile, comprising:
the first acquisition module is used for acquiring first electric quantity demand information of a target vehicle;
the second acquisition module is used for acquiring first output electric quantity information of a target charging gun through first equipment in a charging pile, and/or acquiring second output electric quantity information of the target charging gun through second equipment in the charging pile, wherein the target charging gun is used for charging the target vehicle;
and the determining module is used for adjusting the first actual output electric quantity of the target charging gun according to the first electric quantity demand information, the first output electric quantity information and/or the second output electric quantity information.
10. A non-volatile storage medium, characterized in that the non-volatile storage medium includes a stored program, wherein when the program runs, a device in which the non-volatile storage medium is located is controlled to execute the charging pile output control method according to any one of claims 1 to 8.
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