An Automatic Power Regulation Adaptation Method, Device and System for a Charging Gun

Abstract

The present invention discloses a method, device and system for automatically adjusting the power of a charging gun to adapt. The method includes obtaining information of each charging gun, including the current charging power of the charging gun and the battery charge state of the vehicle being charged; setting the operating control conditions and power release conditions for the total power of the charging station; cyclically determining whether the current total power of the charging station meets the control or release conditions, and according to the judgment result, combining the information of each charging gun, performing power limit adjustment on all charging guns. The present invention can provide support for the safe operation of the distribution transformer for the charging station operator, assist the charging station operator to participate in the load-side demand response, maximize the charging experience of charging users, and is of great significance for the lean management of the power grid, ensuring the stable operation of the power system, and improving the charging management and operation benefits.

Description

Technical Field

[0001] The present invention belongs to the technical field of power regulation, and particularly relates to a method, device and system for automatically regulating the power of a charging gun to adapt thereto. Background Art

[0002] With the rapid development of technologies such as distributed energy, energy storage, electric vehicles, and intelligent energy use, the way of using energy on the demand side has undergone fundamental changes. As an effective alternative to traditional means of transportation, electric vehicles have attracted wide attention worldwide. With the increase in the number of new energy vehicles, the vehicle-to-pile ratio has not dropped to the ideal level, and charging difficulties and slow charging remain the most worrying problems for car owners at present. At present, charging stations lack an automated charging control system, and cannot achieve reasonable distribution of the power of charging piles, which is likely to cause safety problems such as overloading of charging power.

[0003] Currently, the technology for charging operation management of charging stations is becoming increasingly mature, and the research content mainly includes: constructing a power coordination control network for charging piles, and performing rapid power adjustment based on the current load utilization rate of the charging station; constructing a reactive power compensation control strategy for the charging station by using the remaining capacity of the charging facilities, while improving the capacity utilization rate of the charging station, performing reactive power compensation on the distribution network, and improving the voltage quality; on the premise of meeting the charging needs of electric vehicle users and the capacity limit of the distribution transformer, a first-stage optimization model with the maximization of the charging income of the charging station as the goal is established, and considering maximizing the incentives given by the power grid company for reducing the peak-valley difference, a second-stage optimization model is established with the maximum charging income obtained from the first-stage optimization as the constraint. Effectively improve the operation stability and economy of the charging station, and achieve deep demand response on the load side. Summary of the Invention

[0004] In view of the above problems, the present invention proposes a method, device and system for automatically regulating the power of a charging gun to adapt thereto. By setting a power operation control scheme and a power release scheme, the economic benefits of charging station manufacturers are maximized, and the charging experience of charging car owners is optimized. The problem of insufficient load of the distribution transformer that needs to be increased in capacity is solved, and the power overload and even damage of the distribution transformer caused by simultaneous charging of multiple vehicles are completely avoided.

[0005] In order to achieve the above technical objectives and reach the above technical effects, the present invention is realized through the following technical solutions:

[0006] In a first aspect, the present invention provides a method for automatically regulating the power of a charging gun to adapt thereto, including:

[0007] Obtaining information of each charging gun, including the current charging power of the charging gun and the battery charge state of the vehicle being charged;

[0008] Setting the operation control conditions and power release conditions of the total power of the charging station;

[0009] Loop to determine whether the current total power of the charging station meets the control or release condition, and based on the judgment result, combined with the information of each charging gun, adjust the power limit of all charging guns.

[0010] Optionally, the loop to determine whether the current total power of the charging station meets the control or release condition includes:

[0011] If there is no vehicle charging at the charging station, set the maximum allowable power of the charging station to q times the capacity, then evenly distribute the power of v times the capacity to each gun, and the power limit value assigned to each charging gun is where N is the number of charging guns, and q > v > 1.

[0012] Optionally, the operation control condition is:

[0013] P now -P target > ε M

[0014] In the formula, P now is the total power of all charging guns, P target is the target power value; ε M is the power threshold corresponding to time, formulated according to the transformer safety specification, and the allowable operation time lengths are different for different power limits;

[0015] The power release condition is:

[0016] P now -P target < ε U

[0017] In the formula, P now is the total power of all charging guns, P target is the target power value; ε U is the power threshold corresponding to time, formulated according to the operation and management preferences of the charging station operator.

[0018] Optionally, the loop to determine whether the current total power of the charging station meets the control or release condition includes:

[0019] If there is a vehicle charging at the charging station, calculate the total power P now of all charging guns, and determine whether it meets the power control condition or the power release condition; the total power of all charging guns is the total power of the charging station;

[0020] When the power control condition is met, execute the power reduction plan;

[0021] When the power release condition is met, execute the power release plan.

[0022] Optionally, the power reduction plan includes the following steps:

[0023] Calculate the power ΔP that needs to be reduced d , where: ΔP d = P now - P target ;

[0024] Set the minimum charging power P MIN , satisfying: P MIN × N < P target ;

[0025] According to the current charging power PowerNow of each charging gun i and the state of charge SoC of the battery of the vehicle charged by each charging gun i , screen out the charging guns with the current charging power greater than P MIN ;

[0026] For the charging guns with the current charging power greater than P MIN , calculate the proportionality coefficient that needs to be reduced:

[0027]

[0028] In the formula, f is the SoC mapping function when releasing power. The lower the state of charge of the battery of the vehicle being charged, the smaller the proportionality coefficient for reducing the power of the charging gun; A is the set of charging guns that need to reduce the charging power;

[0029] Based on the proportionality coefficient d i Calculate the power that the charging guns in set A need to reduce:

[0030] Optionally, the power reduction scheme further includes the following steps:

[0031] For set B after reducing the power , take Reduce the charging power of the charging guns in set B to At the same time, generate the remaining power that should be reduced but has not been reduced

[0032] Regard the remaining power as the power that needs to be reduced, and calculate the additional power that the charging guns in the set (A - B) of charging guns that need to reduce the charging power need to reduce. If the power after reducing the power of the charging gun set (A - B) is less than P MIN , then continue to repeat this operation until the power after reducing the power of all charging guns that need to reduce the power is calculated

[0033] Optionally, considering the situation where new charging guns start charging after implementing the power control scheme, then read the total power reduced by all previous charging guns P降总 , take P 降总 +P now as P now , as PowerNow i , and substitute it into the power reduction plan for re - allocation.

[0034] Optionally, the power release plan includes the following steps:

[0035] Calculate the power ΔP that needs to be released u , where: ΔP u =P target -P now ;

[0036] Read the current charging power PowerNow of each gun i and the state of charge SoC of the battery of the vehicle charged by each charging gun i ;

[0037] Judge whether the charging gun is within the limit state. If PowerNow i <LimitedValue i , it indicates that the charging gun has exceeded the limit and is in the constant - voltage charging stage or trickle - charging stage, and no power release is required; otherwise, it indicates that the charging gun is within the limit state;

[0038] Calculate the proportionality coefficient u that needs to be increased for each vehicle within the limit state i :

[0039]

[0040] where g is the SoC mapping function when releasing power. The lower the state of charge of the battery of the vehicle being charged, the higher the power released by the vehicle; C is the set of charging guns that need to release charging power;

[0041] Obtain the power limit value that each vehicle needs to increase The steps of the power release plan end.

[0042] Optionally, the automatic power adjustment adaptation method for the charging gun further includes:

[0043] When neither the power control condition nor the power release condition is satisfied, allocate (q - v)×P target to all the charging guns that are currently charging according to the power release plan, and adjust the power limit values of all other empty guns to n is the number of current empty guns.

[0044] Optionally, for the case where the power control condition or the power release condition is satisfied, since the power after the change in control or release is both Ptarget , the power limit values of all other empty guns are adjusted to where n is the number of current empty guns.

[0045] In a second aspect, the present invention provides an automatic power adjustment adaptation device for a charging gun, comprising:

[0046] An acquisition module, configured to acquire information of each charging gun, including the current charging power of the charging gun and the battery charge state of the vehicle being charged;

[0047] A setting module, configured to set the operation control conditions and power release conditions of the total power of the charging station;

[0048] A power adjustment module, configured to cyclically determine whether the current total power of the charging station meets the control or release conditions, and based on the determination result, combine the information of each charging gun to adjust the power limit of all charging guns.

[0049] In a third aspect, the present invention provides an automatic power adjustment adaptation device for a charging gun, comprising:

[0050] A storage medium and a processor;

[0051] The storage medium is used to store instructions;

[0052] The processor is configured to operate according to the instructions to execute the method according to any one of the methods in the first aspect.

[0053] Compared with the prior art, the beneficial effects of the present invention are:

[0054] The present invention provides an automatic power adjustment adaptation method, device and system for a charging gun. By acquiring the information of each charging gun, setting the operation control conditions and power release conditions of the total power of the charging station, and cyclically determining whether the current total power of the charging station meets the control or release conditions; if the total power meets the operation control conditions, a power reduction scheme is executed according to the battery charge state of the vehicle charged by the charging gun; if the total power meets the power release conditions, a power release scheme is executed according to the battery charge state of the vehicle charged by the charging gun. It provides support for the safe operation of the distribution transformer for the charging station operator, assists the charging station operator to participate in the load-side demand response, maximally guarantees the charging experience of charging users, and is of great significance for the lean management of the power grid, ensuring the stable operation of the power system, and improving the charging management and operation benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] In order to make the content of the present invention easier to be clearly understood, the following further describes the present invention in detail according to specific embodiments in conjunction with the drawings, wherein:

[0056] Figure 1Schematic flow diagram of an automatic power adjustment adaptation method for a charging gun according to an embodiment of the present invention. Detailed implementation manners

[0057] In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below in conjunction with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the protection scope of the present invention.

[0058] The application principle of the present invention will be described in detail below with reference to the accompanying drawings.

[0059] Embodiment 1

[0060] An automatic power adjustment adaptation method for a charging gun is provided in an embodiment of the present invention. As Figure 1 shown, it specifically includes the following steps:

[0061] (1) Obtain information of each charging gun, including the current charging power of the charging gun and the battery charge state of the vehicle being charged;

[0062] (2) Set the operating control conditions and power release conditions for the total power of the charging station;

[0063] (3) Continuously judge whether the current total power of the charging station meets the control or release conditions, and based on the judgment result, combine the information of each charging gun to adjust the power limit of all charging guns; specifically: if the total power of all charging guns meets the operating control conditions, execute a power reduction plan according to the battery charge state of the vehicle being charged by the charging gun; if the total power of all charging guns meets the power release conditions, execute a power release plan according to the battery charge state of the vehicle being charged by the charging gun.

[0064] In a specific implementation manner of the embodiment of the present invention, the method for obtaining information of each charging gun includes:

[0065] First, obtain the current charging power PowerNow of the charging gun i ;

[0066] Next, obtain the battery charge state SoC i of the vehicle being charged, that is, the percentage of the current power in the total power;

[0067] Finally, obtain the vehicle charging start time StartTime, which can mark all guns with a charging time exceeding X seconds and include them in the operating control range; X can be set according to the actual situation, such as set to 30 or 50, etc.;

[0068] In a specific implementation manner of the embodiment of the present invention, the method for setting the operating control conditions and power release conditions for the total power of the charging station includes:

[0069] According to the performance and safety specifications of dry-type transformers, set the operating control conditions that the total power of the charging station should meet. Set the power release conditions according to the operation preferences of the charging station. P target is the target power value to be controlled, usually the single-capacity value of the distribution transformer. Here, take P target as the single-capacity value of the distribution transformer; specifically:

[0070] The operating control conditions are:

[0071] P now -P target > ε M

[0072] In the formula, P now is the total power of all charging guns, P target is the target power value; ε M is the power threshold corresponding to time, formulated according to the transformer safety specifications. The allowable operating time lengths are different for different power limits;

[0073] The power release conditions are:

[0074] P now -P target < ε U

[0075] In the formula, P now is the total power of all charging guns, P target is the target power value; ε U is the power threshold corresponding to time, formulated according to the operation and management preferences of the charging station operator

[0076] In a specific implementation manner of the embodiment of the present invention, the loop for judging whether the current total power of the charging station meets the control or release conditions includes:

[0077] (3.1) If there is no vehicle charging at the charging station, set the maximum allowable power of the charging station to q times the capacity, and then evenly distribute the power of v times the capacity to each gun. The power limit assigned to each charging gun is where N is the number of charging guns, and q > v > 1. That is, the same power limit is assigned to all charging guns in the initial empty state. At this time, the total power of each charging gun is less than the power limit of the distribution transformer of the charging station.

[0078] (3.2) If there are vehicles charging at the charging station, calculate the total power P now of all charging guns, and judge whether it meets the power control conditions or the power release conditions; when the power control conditions are met, execute the power reduction plan; when the power release conditions are met, execute the power release plan. The total power of all charging guns is the total power of the charging station.

[0079] The power reduction scheme includes the following steps:

[0080] Calculate the power ΔP that needs to be reduced d , where: ΔP d = P now - P target ;

[0081] Set the minimum charging power P MIN , satisfying: P MIN ×N < P target ;

[0082] According to the current charging power PowerNow of each charging gun i and the state of charge SoC of the battery of the vehicle charged by each charging gun i , screen out the charging guns with the current charging power greater than P MIN ;

[0083] For the charging guns with the current charging power greater than P MIN , calculate the proportionality coefficient that needs to be reduced:

[0084]

[0085] In the formula, f is the SoC mapping function when releasing power, f(SoC) = 1.5 - cos(2.5×SoC). The lower the state of charge of the battery of the vehicle being charged, the smaller the proportionality coefficient for reducing the power of the charging gun; A is the set of charging guns that need to reduce the charging power;

[0086] Based on the proportionality coefficient d i Calculate the power that the charging guns in set A need to reduce:

[0087] For the set B after reducing the power , at this time, in order to make the controlled power not lower than P MIN , take Reduce the charging power of the charging guns in set B to At the same time, generate the remaining power that should be reduced but has not been reduced

[0088] Regard the remaining power as the power that needs to be reduced and substitute it into the power reduction scheme to calculate the additional power that the charging guns in the set of charging guns (A - B) that need to reduce the charging power need to reduce. If the power after reducing the power of the set of charging guns (A - B) is less than P MIN , then continue to repeat this operation until the power after reducing the power of all the charging guns that need to reduce the power is calculated Note: Since P MINMeet P MIN ×N < P target Condition, it can be known that during the repeated operation process, set A remains unchanged, set B gradually increases, but set (A - B) will not be empty. Also, since the number of charging guns N is finite, the power reduction scheme is a finite loop calculation. The power reduction scheme steps end.

[0089] Furthermore, considering the situation where new charging guns start charging after the power control scheme is executed, then read the total power reduction P of all the previous charging guns 降总 , and use P 降总 +P now as P now , as PowerNow i , and substitute it into the power reduction scheme for re - distribution.

[0090] When the power release condition is met, execute the power release scheme. The power release scheme includes the following steps:

[0091] First, calculate the power ΔP to be released u , where: ΔP u = P target - P now ;

[0092] Then, read the current charging power PowerNow of each gun i and the state of charge SoC of the battery of the vehicle charged by each charging gun i ;

[0093] Judge whether the charging gun is within the restricted state. If PowerNow i < LimitedValue i , it means that the charging gun has been out of the restriction and is in the constant - voltage charging stage or the trickle - charging stage, and there is no need to release power; otherwise, it means that the charging gun is within the restricted state;

[0094] Secondly, calculate the proportionality coefficient u that each vehicle in the restricted state needs to be increased i :

[0095]

[0096] Among them, g is the SoC mapping function when releasing power, g(SoC)=1.5 + cos(2.5×SoC). The lower the state of charge of the battery of the vehicle being charged, the higher the power released by the vehicle; C is the set of charging guns that need to release charging power;

[0097] Get the power limit value ΔP that each vehicle needs to be increased ui = u i ×ΔPu , the power release scheme steps end.

[0098] For the case where the power control condition or power release condition is satisfied, since the power after the change control or release is both P target , then adjust the power limit values of all other idle guns to n is the number of current idle guns.

[0099] (3.3) When neither the power control condition nor the power release condition is satisfied, allocate (q - v) × P target to all the charging guns that are charging according to the power release scheme, and adjust the power limit values of all other idle guns to n is the number of current idle guns.

[0100] Embodiment 2

[0101] Based on the same inventive concept as Embodiment 1, an automatic power adjustment adaptation device for charging guns is provided in an embodiment of the present invention, including:

[0102] An acquisition module for acquiring information of each charging gun, including the current charging power of the charging gun and the battery charge state of the vehicle being charged;

[0103] A setting module for setting the operation control conditions and power release conditions of the total power of the charging station;

[0104] A power adjustment module for cyclically determining whether the current total power of the charging station meets the control or release conditions, and based on the judgment result, combining the information of each charging gun, adjusting the power limit of all charging guns.

[0105] In a specific implementation manner of the embodiment of the present invention, the method for acquiring information of each charging gun includes:

[0106] First, acquire the current charging power PowerNow of the charging gun i ;

[0107] Next, acquire the battery charge state SoC of the vehicle being charged i , that is, the percentage of the current power in the total power;

[0108] Finally, acquire the vehicle charging start time StartTime, mark all the guns with a charging time exceeding 30 seconds, and include them in the operation control range.

[0109] In a specific implementation manner of the embodiment of the present invention, the method for setting the operation control conditions and power release conditions of the total power of the charging station includes:

[0110] According to the performance and safety specifications of dry-type transformers, set the operating control conditions that the total power of the charging station should meet. Set the power release conditions according to the operating preferences of the charging station. P target is the target power value to be controlled, usually the single-capacity value of the distribution transformer. Here, take P target as the single-capacity value of the distribution transformer; specifically:

[0111] The operating control conditions are:

[0112] P now -P target > ε M

[0113] In the formula, P now is the total power of all charging guns, and P target is the target power value; ε M is the power threshold corresponding to time, formulated according to the transformer safety specifications. The allowable operating time lengths are different for different power limits;

[0114] The power release conditions are:

[0115] P now -P target < ε U

[0116] In the formula, P now is the total power of all charging guns, and P target is the target power value; ε U is the power threshold corresponding to time, formulated according to the operating management preferences of the charging station operator

[0117] In a specific implementation manner of the embodiment of the present invention, the loop for judging whether the current total power of the charging station meets the control or release conditions includes:

[0118] (3.1) If there is no vehicle charging at the charging station, set the maximum allowable power of the charging station to q times the capacity, and then evenly distribute the power of v times the capacity to each gun. The power limit assigned to each charging gun is where N is the number of charging guns, and q > v > 1. That is, the same power limit is assigned to all charging guns in the initial vacant state. At this time, the total power of each charging gun is less than the power limit of the distribution transformer of the charging station.

[0119] (3.2) If there is a vehicle charging at the charging station, calculate the total power P now of all charging guns, and judge whether it meets the power control conditions or the power release conditions; when the power control conditions are met, execute the power reduction plan; when the power release conditions are met, execute the power release plan. The total power of all charging guns is the total power of the charging station.

[0120] The power reduction scheme includes the following steps:

[0121] Calculate the power ΔP that needs to be reduced d , where: ΔP d = P now - P target ;

[0122] Set the minimum charging power P MIN , satisfying: P MIN ×N < P target ;

[0123] According to the current charging power PowerNow of each charging gun i and the state of charge SoC of the battery of the vehicle charged by each charging gun i , screen out the charging guns with the current charging power greater than P MIN ;

[0124] For the charging guns with the current charging power greater than P MIN , calculate the proportionality coefficient that needs to be reduced:

[0125]

[0126] In the formula, f is the SoC mapping function when releasing power, f(SoC) = 1.5 - cos(2.5×SoC). The lower the state of charge of the battery of the vehicle being charged, the smaller the proportionality coefficient for reducing the power of the charging gun; A is the set of charging guns that need to reduce the charging power;

[0127] Based on the proportionality coefficient d i Calculate the power that the charging guns in set A need to reduce:

[0128] For the set B after reducing the power , at this time, in order to make the controlled power not lower than P MIN , take Reduce the charging power of the charging guns in set B to At the same time, generate the remaining power that should be reduced but has not been reduced

[0129] Take the remaining power As the power that needs to be reduced and substitute it into the power reduction scheme, calculate the additional power that the charging guns in the set of charging guns (A - B) that need to reduce the charging power need to reduce. If the power after reducing the power of the set of charging guns (A - B) is less than P MIN , then continue to repeat this operation until the power after reducing the power of all the charging guns that need to reduce the power Note: Since P MIN satisfies P MIN ×N < Ptarget Under this condition, it can be known that during the repeated operation process, set A remains unchanged, set B gradually increases, but set (A - B) will not be empty. Also, since the number N of charging guns is finite, the power reduction scheme is a finite loop calculation. The steps of the power reduction scheme end.

[0130] Furthermore, considering the situation where new charging guns start charging after the power control scheme is executed, then read the total reduced power P of all the charging guns before. 降总 , take P 降总 +P now as P now , as PowerNow i , and substitute it into the power reduction scheme for re - distribution.

[0131] When the power release condition is met, execute the power release scheme. The power release scheme includes the following steps:

[0132] First, calculate the power ΔP to be released u , where: ΔP u =P target -P now ;

[0133] Then, read the current charging power PowerNow of each gun i and the state of charge SoC of the battery of the vehicle charged by each charging gun i ;

[0134] Judge whether the charging gun is within the restricted state. If PowerNow i <LimitedValue i , it indicates that the charging gun has been out of the restriction and is in the constant - voltage charging stage or the trickle - charging stage, and no power release is required; otherwise, it indicates that the charging gun is within the restricted state;

[0135] Secondly, calculate the proportionality coefficient u that each vehicle in the restricted state needs to be increased i :

[0136]

[0137] where g is the SoC mapping function when releasing power, g(SoC)=1.5 + cos(2.5×SoC). The lower the state of charge of the battery of the vehicle being charged, the higher the power released by the vehicle; C is the set of charging guns that need to release the charging power;

[0138] Obtain the power limit value that each vehicle needs to be increased The steps of the power release scheme end.

[0139] For the case where the power control condition or the power release condition is satisfied, since the power after the change control or release is both P target , the power limit values of all other empty guns are adjusted to where n is the number of current empty guns.

[0140] (3.3) When neither the power control condition nor the power release condition is satisfied, (q - v) × P target is distributed to all the charging guns that are charging according to the power release scheme, and the power limit values of all other empty guns are adjusted to where n is the number of current empty guns.

[0141] Embodiment 3

[0142] Based on the same inventive concept as Embodiment 1, an automatic power adjustment adaptation device for a charging gun is provided in an embodiment of the present invention, including a storage medium and a processor;

[0143] The storage medium is used to store instructions;

[0144] The processor is used to operate according to the instructions to execute the method according to any one of the methods in Embodiment 1.

[0145] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0146] The present application is described with reference to the flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each flow and / or block in the flowchart and / or block diagram, and the combination of flows and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing devices generate means for realizing the functions specified in one Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0147] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to operate in a particular manner, such that the instructions stored in the computer-readable memory produce a manufacture including an instruction device that implements the functions specified in the process(es) Figure 1 one or more processes and / or blocks Figure 1 specified in the block(s) or blocks.

[0148] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process, so that the instructions executed on the computer or other programmable apparatus provide steps for implementing the functions specified in the process(es) Figure 1 one or more processes and / or blocks Figure 1 specified in the block(s) or blocks.

[0149] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications or equivalent replacements can still be made to the specific embodiments of the present invention. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention shall be covered by the protection scope of the claims of the present invention.

Claims

1. An automatic power adjustment adaptation method for a charging gun, characterized in that, it includes: Obtain information of each charging gun, including the current charging power of the charging gun and the battery charge state of the vehicle being charged; Set the operating control conditions and power release conditions for the total power of the charging station; Circularly judge whether the current total power of the charging station meets the control or release conditions, and according to the judgment result, combined with the information of each charging gun, adjust the power limit of all charging guns; The circular judgment of whether the current total power of the charging station meets the control or release conditions includes: If there are vehicles charging at the charging station, calculate the total power P of all charging guns now , and determine whether the operating control conditions or power release conditions are met; the total power of all charging guns is the total power of the charging station; When the operating control conditions are met, execute the power reduction plan; When the power release conditions are met, execute the power release plan; The power reduction plan includes the following steps: Calculate the power ΔP that needs to be reduced d , where: ΔP d = P now - P target ; P target is the target power value; Set the minimum charging power P MIN , satisfying: P MIN ×N < P target ; N is the number of charging guns; According to the current charging power PowerNow of each charging gun i and the state of charge SoC of the battery of the vehicle charged by each charging gun i , select the charging guns with the current charging power greater than P MIN ; For a charging gun with a current charging power greater than P MIN calculate the proportionality coefficient that needs to be reduced: Where f is the SoC mapping function when releasing power, and the lower the battery charge state of the vehicle being charged, the smaller the proportional coefficient of power reduction for this charging gun; A is the set of charging guns that need to reduce the charging power; Based on the proportionality coefficient d i Calculate the power that the charging guns in set A need to reduce: The operating control conditions are: P now -P target > ε M Where P now is the total power of all charging guns; ε M is the power threshold corresponding to time, which is formulated according to the transformer safety specification, and the allowable running time lengths are different for different power limits. The power release conditions are: P now -P target <ε U Wherein, P now is the total power of all charging guns, and P target is the target power value; ε U is the power threshold corresponding to time, which is formulated according to the operation and management preferences of the charging station operator.

2. An automatic power adjustment adaptation method for a charging gun according to claim 1, characterized in that, The circular judgment of whether the current total power of the charging station meets the control or release conditions includes: If there is no vehicle charging at the charging station, set the maximum allowable power of the charging station to q times the capacity, and then evenly distribute the power of v times the capacity to each gun. The power limit assigned to each charging gun is q > v > 1.

3. An automatic power adjustment adaptation method for a charging gun according to claim 1, characterized in that: The power reduction plan further includes the following steps: For the set B after power reduction take Reduce the charging power of the charging guns in set B to At the same time, there is remaining power that should have been reduced but was not Treat the remaining power as the power to be reduced, calculate the additional power that needs to be reduced for the charging guns in the set of charging guns (A - B) for which the charging power needs to be reduced. If the power after reduction in the set of charging guns (A - B) is less than P MIN , then continue to repeat this operation until the power after reduction for all charging guns that need to have their power reduced is calculated 4. An automatic power adjustment adaptation method for a charging gun according to claim 3, characterized in that: Consider the case where a charging gun is newly added after implementing the power control scheme, then read the total reduced power P of all previous charging guns 降总 , and take P 降总 + P now as P now , take it as PowerNow i , and substitute it into the power reduction scheme for re - distribution.

5. An automatic power adjustment adaptation method for a charging gun according to claim 1, characterized in that: The power release plan includes the following steps: Calculate the power ΔP to be released u , where: ΔP u = P target - P now ; Read the current charging power PowerNow of each gun i and the state of charge SoC of the battery of the vehicle charged by each charging gun i ; Determine whether the charging gun is within the restricted state. If PowerNow i <LimitedValue i , LimitedValue i is the charging power limit value for each gun, it indicates that the charging gun has been released from the restriction and is in the constant voltage charging stage or the trickle charging stage, and there is no need to release power; otherwise, it indicates that the charging gun is within the restricted state; Calculate the proportionality coefficient u by which each vehicle within the restricted state needs to be increased i : Where g is the SoC mapping function when releasing power, and the lower the battery charge state of the vehicle being charged, the higher the power released by this vehicle; C is the set of charging guns that need to release the charging power; Obtain the power limit value that each vehicle needs to increase The steps of the power release plan end.

6. An automatic power adjustment adaptation method for a charging gun according to claim 2, characterized in that: The automatic power adjustment adaptation method for the charging gun further includes: When neither the operation control condition nor the power release condition is satisfied, (q - v) × P target is allocated to all the charging guns that are charging according to the power release scheme, and the power limit values of all other empty guns are adjusted to where n is the number of current empty guns.

7. An automatic power adjustment adaptation method for a charging gun according to claim 1, characterized in that: For the case where the operating control condition or power release condition is satisfied, since the power after the change control or release is both P target , the power limit values of all other empty guns are adjusted to where n is the number of current empty guns.

8. An automatic power adjustment adaptation device for a charging gun, characterized in that: it includes: An acquisition module for acquiring information of each charging gun, including the current charging power of the charging gun and the battery charge state of the vehicle being charged; A setting module for setting the operating control conditions and power release conditions for the total power of the charging station; A power adjustment module for circularly judging whether the current total power of the charging station meets the control or release conditions, and according to the judgment result, combined with the information of each charging gun, adjusting the power limit of all charging guns; The circular judgment of whether the current total power of the charging station meets the control or release conditions includes: If there are vehicles charging at the charging station, calculate the total power P of all charging guns now , and determine whether the operating control conditions or power release conditions are met; the total power of all charging guns is the total power of the charging station; When the operating control conditions are met, execute the power reduction plan; When the power release conditions are met, execute the power release plan; The power reduction plan includes the following steps: Calculate the power ΔP that needs to be reduced d , where: ΔP d = P now - P target ; P target is the target power value; Set the minimum charging power P MIN , satisfying: P MIN ×N < P target ; N is the number of charging guns; Based on the current charging power PowerNow of each charging gun i and the state of charge SoC of the battery of the vehicle being charged by each charging gun i , select the charging guns with a current charging power greater than P MIN ; For a charging gun with a current charging power greater than P MIN , calculate the proportionality coefficient that needs to be reduced: Where f is the SoC mapping function when releasing power, and the lower the battery charge state of the vehicle being charged, the smaller the proportional coefficient of power reduction for this charging gun; A is the set of charging guns that need to reduce the charging power; Based on the proportionality coefficient d i Calculate the power that the charging gun in set A needs to reduce: ΔP di = d i ×ΔP d ; The operating control conditions are: P now -P target > ε M Where P now is the total power of all charging guns; ε M is the power threshold corresponding to time, which is formulated according to the transformer safety specification. The allowable running time lengths are different for different power limits. The power release conditions are: P now -P target <ε U Wherein, P now is the total power of all charging guns, and P target is the target power value; ε U is the power threshold corresponding to time, which is formulated according to the operation and management preferences of the charging station operator.

9. An automatic power adjustment adaptation device for a charging gun, characterized in that: it includes: a storage medium and a processor; the storage medium is used for storing instructions; the processor is used for operating according to the instructions to execute the method according to any one of claims 1 to 7.

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