A charging pile control system based on digital twin

Abstract

The present invention discloses a charging pile control system based on digital twins, which relates to the technical field of charging pile charging current control, and includes a collection and construction module, which collects data of charging pile entities in the current area, and constructs a digital twin model of the charging pile entity in a virtual space based on the one-to-one mapping of the data of the charging pile entity, which is recorded as a virtual model; the present invention determines the current fuse terminal temperature trend characteristics, outputs a corresponding signal, and determines whether to control the charging current of the charging pile entity according to the output signal, thereby reducing the risk of the charging pile entity being blown due to excessive current causing the fuse temperature to be too high during charging, thereby ensuring the safety of the charging pile entity during charging; by pre-controlling the charging pile entity in the virtual model before controlling the charging pile entity, and applying it to the charging pile entity when the expected temperature is reached, the control inside the charging pile entity can be made more accurate and safer.

Description

Technical Field

[0001] The present invention relates to the technical field of charging pile charging current regulation, and more specifically, to a charging pile regulation system based on digital twins. Background Art

[0002] A charging pile refers to a charging device that provides energy for electric vehicles. Its function is similar to that of a gas pump in a gas station. It can be fixed on the ground or on the wall and installed in public buildings, residential parking lots or charging stations to charge electric vehicles.

[0003] The existing Chinese authorized invention patent CN116494816B discloses a charging management system and method for a charging pile, which obtains a charging current signal of a predetermined time period and an ambient temperature value at multiple predetermined time points within the predetermined time period; performs feature extraction and cross-modal fusion on the charging current signal and the ambient temperature values ​​at the multiple predetermined time points to obtain an optimized current time series feature matrix that integrates ambient temperature information; and, based on the optimized current time series feature matrix that integrates ambient temperature information, determines an adjustment strategy for the maximum charging current. In this way, deep learning and artificial intelligence technologies can be used to obtain the charging current signal and ambient temperature value of a predetermined time period and process and fuse the charging current signal and ambient temperature value, so as to achieve effective control and correction of the maximum charging current and improve the safety performance of the charging pile.

[0004] However, in the process of adjusting the charging current of the charging pile, the above-mentioned patent fails to judge the risk of the fuse blowing according to the temperature trend of the terminal temperature of the fuse inside the charging pile, and pre-regulate the subsequent charging current. Moreover, after the charging pile has been used for a long time, its fuse is prone to blowing when it ages or the current is too large, requiring maintenance, which may easily affect the daily use of the charging pile. Summary of the invention

[0005] In view of the problem in the prior art that the risk of a fuse blowing is not determined based on the temperature trend of the fuse terminal inside the charging pile, and the subsequent charging current is not pre-regulated based on this, the purpose of the present invention is to provide a charging pile control system based on digital twins, which can determine the current temperature trend characteristics of the fuse terminal and pre-regulate the charging current, thereby reducing the risk of the fuse blowing due to excessive temperature caused by excessive current when the charging pile entity is charging.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: A charging pile control system based on digital twins, comprising: a collection and construction module, which collects data of charging pile entities in the current area, and constructs a digital twin model of the charging pile entity in a virtual space based on a one-to-one mapping of the data of the charging pile entity, which is recorded as a virtual model;

[0007] A database module is used to obtain historical data of multiple charging piles where fuses have blown, wherein the historical data of the charging piles includes historical temperatures of the fuse terminals and historical charging currents of the charging piles, and a relationship between the historical temperatures of the fuse terminals and the historical charging currents of the charging piles is constructed based on the historical temperatures of the fuse terminals and the historical charging currents of the charging piles;

[0008] An extraction module extracts current variation characteristics based on the historical charging current of the charging pile, and obtains the maximum safe temperature of the fuse terminal through the current variation characteristics;

[0009] A determination and selection module is used to obtain the trend characteristics of the current fuse terminal temperature, and output a signal corresponding to the current fuse terminal temperature based on the trend characteristics, wherein the corresponding signal includes a normal signal, an emergency reminder signal, and an adjustment signal;

[0010] The control module controls the charging current of the virtual model by adjusting the signal to obtain a virtual control effect, and performs the same control on the charging pile entity according to the virtual control effect.

[0011] Preferably, the acquisition and construction module obtains the charging pile entity data and environmental data of the charging piles in the current area through the acquisition device, constructs a virtual model based on the one-to-one mapping of the charging pile entity data and the environmental data in the virtual space, establishes a feature sample library of the charging pile entity, and recognizes the features based on the feature sample library to achieve synchronization between the charging pile entity and the virtual model.

[0012] Preferably, the relationship between the fuse terminal historical temperature and the charging pile historical charging current is constructed based on the fuse terminal historical temperature and the charging pile historical charging current, including:

[0013] The historical temperature of the fuse terminal is preset to be linearly related to the charging current of the charging pile. The proportional coefficient K in multiple time intervals is obtained through the historical data of the fuse terminal temperature of the charging pile under constant voltage and different charging currents. Then, the formula of the proportional coefficient K is:

[0014] K=(Q-α) / I,

[0015] Where Q is the fuse terminal temperature, K is the proportionality coefficient, and α is the current internal temperature of the charging pile;

[0016] Calculate multiple proportional coefficients K through K-CenterClustering to obtain the center point value K;

[0017] Substituting the center point value K into the formula of S20, the relationship between the fuse terminal temperature and the charging current of the charging pile is obtained: Q=KI+α.

[0018] Preferably, the current variation characteristics extracted based on the historical charging current of the charging pile include:

[0019] The formula BHI=I is preset to have current variation characteristics i -I i+1 ,

[0020] Where BHI is the value of the changing current, i is the time point, I i is the current corresponding to time point i, I i+1 is the current corresponding to time point i+1;

[0021] Extract the time interval with constant voltage and constant input current in the historical data, and input the current in the time interval into the above formula;

[0022] If BHI>0, the fuse terminal temperature and charging pile charging current corresponding to this current change characteristic are marked.

[0023] Preferably, the method of obtaining the maximum safe temperature of the fuse terminal through the current variation characteristics includes:

[0024] Obtain the lowest temperature among the fuse terminal temperatures corresponding to the multiple current change characteristics, record the lowest temperature as the lowest temperature sample, and take one decimal place for the lowest temperature;

[0025] Sort multiple lowest temperature samples from low to high temperature, and sort the samples with the same lowest temperature in parallel;

[0026] The number of times multiple samples with the same minimum temperature are obtained;

[0027] If the number of times the same minimum temperature occurs is less than 2% of the total number of samples, the minimum temperature is deleted; if the number of times the same minimum temperature occurs is greater than or equal to 2% of the total number of samples, this minimum temperature is the maximum safe temperature and is marked as Qmax.

[0028] Preferably, the obtaining of the trend characteristics of the current fuse terminal temperature includes:

[0029] There are N unit times in the set time period, and the current fuse terminal temperature is obtained once in each unit time;

[0030] Mark the next current fuse terminal temperature as Q N+1 , mark the previous current fuse terminal temperature as Q N , via Q 差值 =Q N+1* -Q N , calculate the difference between the two within a time period, Q 差值 is the difference between the next current fuse terminal temperature and the previous current fuse terminal temperature;

[0031] If all Q 差值 =0, the temperature is stable;

[0032] If all Q 差值 >0, the temperature rises;

[0033] If all Q 差值 <0, the temperature drops;

[0034] If there are Q 差值 >0, Q 差值 <0, and Q 差值 >0, Q 差值 <0 is the corresponding value of positive and negative, which is temperature oscillation;

[0035] If there are Q 差值 >0, Q 差值 <0, and Q 差值 >0, Q 差值 <0 is a positive or negative value, the last Q 差值 >0 is recorded as temperature rise, the last Q 差值 <0 is recorded as temperature drop.

[0036] Preferably, the outputting of a signal corresponding to the current fuse terminal temperature based on the trend feature includes:

[0037] If the trend characteristic of the current fuse terminal temperature in the past time period is stable temperature, and the highest temperature in a time period is less than Qmax-Qs, then a normal signal is output, and the charging current of the charging pile entity is not regulated, where Qs is the reserved buffer temperature range, and Qmax-Qs<Qmax;

[0038] If the trend characteristic of the current fuse terminal temperature in the past time period is a temperature drop, and the highest temperature in a time period is less than Qmax-Qs, a normal signal is output and the charging current of the charging pile entity is not regulated;

[0039] If the trend characteristic of the current fuse terminal temperature in the past time period is temperature oscillation, and the highest temperature in a time period is less than Qmax-Qs, a normal signal is output and the charging current of the charging pile entity is not regulated;

[0040] If the trend characteristic of the current fuse terminal temperature in the past time period is temperature oscillation, and the highest temperature in a time period is greater than or equal to Qmax-Qs, an emergency reminder signal is output to stop charging the charging pile entity;

[0041] If the trend characteristic of the current fuse terminal temperature in the past time period is temperature rise, and the highest temperature in a time period is less than Qmax-Qs, an adjustment signal is output, and the charging current of the charging pile entity is regulated by the adjustment signal.

[0042] Preferably, the charging current of the virtual model is regulated by adjusting the signal to obtain a virtual regulation effect, and the charging pile entity is regulated in the same manner according to the virtual regulation effect, including:

[0043] Get the current fuse terminal temperature Q in the current charging pile entity 当前 、Current charging current of charging pile I 当前 , set the expected temperature Q to which the fuse terminal temperature needs to be adjusted 预计 ;

[0044] By Q 调节 =Q 当前 -Q 预计 , the temperature that needs to be adjusted for the current fuse terminal temperature is recorded as Q 调节 , through Q = KI + α, we can get the expected reduction in charging current I of the charging pile entity. 调节 ;

[0045] Reduce the virtual model corresponding to the current charging pile entity by I 调节 The charging current is set according to the charging pile historical data. 预计 ;

[0046] In the estimated time T of the virtual model 预计 After the regulation, the virtual regulation effect Q is obtained 虚拟 , the virtual control effect Q 虚拟 With the expected temperature Q 预计 Make comparisons;

[0047] If the estimated time T 预计 Inside, Q 虚拟 预计 , it is considered that the expected temperature has been reached, and then it is applied to the charging pile entity to regulate the charging current of the charging pile entity;

[0048] If the estimated time T 预计 Inside, Q 虚拟 >Q 预计 , it is considered that the expected temperature has not been reached, and steps S71 to S75 are repeated until the expected temperature Q is reached. 预计 .

[0049] Preferably, in the extraction module, it also includes obtaining the current change characteristic times based on the current change characteristic;

[0050] ​The obtaining the current change characteristic times based on the current change characteristic includes:

[0051] Record the number of times BHI>0 for each fuse under constant voltage and constant charging current;

[0052] The number of times BHI>0 is the number of times each fuse has a current change characteristic before it blows;

[0053] The number of current change characteristics is recorded as M.

[0054] Preferably, the average current change characteristic Mpj of each fuse before it blows is calculated. When the fuse differs from the average current change characteristic Mpj by 20%, the current fuse is marked as a fuse to be repaired. The number of the fuse to be repaired, the internal area of ​​the charging pile where it is located, and the location of the charging pile are all sent to the maintenance personnel.

[0055] Compared with the prior art, the present invention has the following beneficial effects:

[0056] 1. In the present invention, by extracting the current change characteristics, the maximum safe temperature of the current fuse terminal can be obtained, and the reserved buffer temperature range of the charging pile during charging can be preset through the maximum safe temperature. According to the maximum safe temperature, the reserved buffer temperature range and the current fuse terminal temperature trend characteristics within a time period, a corresponding signal is output, and it is determined whether to adjust the charging current of the charging pile entity according to the output signal, thereby reducing the risk of the charging pile entity causing the fuse temperature to be too high and melted due to excessive current during charging, thereby ensuring the safety of the charging pile entity during charging; by pre-regulating the charging pile entity in the virtual model before regulating the charging pile entity, and applying it to the charging pile entity when the expected temperature is reached, the regulation inside the charging pile entity can be made more accurate and safer.

[0057] 2. In the present invention, by establishing a feature sample library of the charging pile entity, the pictures collected by the collection device can be quickly identified and classified into corresponding feature samples, so that the virtual model can make advance preparations for subsequent operations according to the corresponding feature samples, and then the virtual model can be quickly synchronized with the operation of the charging pile entity, reducing the reaction time of the virtual model identifying the operation features and synchronizing the virtual model;

[0058] 3. In the present invention, by obtaining the average current change characteristic times of each fuse, the maintenance personnel can be reminded when the average current change characteristics of the fuse occur a certain number of times, which is convenient for the maintenance personnel to repair or replace the fuse and reduces the situation where the fuse suddenly blows. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1The present invention proposes a structural schematic diagram of a charging pile control system based on digital twins;

[0060] Figure 2 It is a schematic diagram of the flow of the control module in the present invention;

[0061] Figure 3 It is a schematic diagram of the process of extracting the module in the present invention. DETAILED DESCRIPTION

[0062] Below, the exemplary embodiments according to the present application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application, and it should be understood that the present application is not limited to the exemplary embodiments described here.

[0063] Embodiment 1

[0064] Reference Figure 1 , Example 1 further illustrates a charging pile control system based on digital twin proposed by the present invention.

[0065] A charging pile control system based on digital twins includes: a collection and construction module, which collects data of charging pile entities in a current area, and constructs a digital twin model of the charging pile entity in a virtual space based on a one-to-one mapping of the data of the charging pile entity, which is recorded as a virtual model;

[0066] The acquisition and construction module acquires the physical data and environmental data of the charging piles in the current area through acquisition devices such as 3D scanners, cameras, and sensors, builds a virtual model based on the one-to-one mapping of the physical data and environmental data of the charging piles in the virtual space, establishes a feature sample library of the charging pile entity, and recognizes the features based on the feature sample library to achieve synchronization between the charging pile entity and the virtual model;

[0067] Among them, a feature sample library of the charging pile entity is established, and the identification of features based on the feature sample library includes the following steps:

[0068] S10, collecting operation pictures of the charging pile entity during use, recording them as an operation picture set, and manually classifying the operation picture set to obtain a classified operation picture set;

[0069] S11, extracting features of a classification operation picture set through a deep neural network model, recorded as a preliminary operation picture feature set, the preliminary operation picture feature set is composed of a plurality of feature combinations, and the features in the preliminary operation picture feature set are arranged in chronological order;

[0070] S12, removing the same features in all preliminary operation picture feature sets, classifying all preliminary operation picture feature sets with the same features in the recognition order into one category, recording them as partially identical feature sets, hiding the same features in the partially identical feature sets, and saving the features that are different from other preliminary operation picture feature sets as the features of the preliminary operation picture feature set;

[0071] For example, the identification features of partially identical feature set A are a1→a2→a3→a4, and the identification features of partially identical feature set B are a1→a2→a3→a4→a5. If a1→a2→a3→a4 is hidden, then the difference between A and B is a5.

[0072] S13, recording the preliminary operation picture feature set processed by S12 as a feature sample;

[0073] S14, recording the picture collected by the collection construction module as an input picture, and inputting the input picture into the feature sample library for feature sample recognition;

[0074] S15, obtaining the similarity between the input image and the feature sample by using the Euclidean distance algorithm, and when the similarity reaches 80%, it can be identified as the corresponding feature sample, and the corresponding feature sample is input into the virtual model to synchronize the virtual model;

[0075] In this embodiment, by establishing a feature sample library of the charging pile entity, the images collected by the acquisition device can be quickly identified and classified into corresponding feature samples, so that the virtual model can make advance preparations for subsequent operations according to the corresponding feature samples, and then the virtual model can be quickly synchronized with the operation of the charging pile entity, reducing the reaction time of the virtual model to identify the operation features and synchronize the virtual model.

[0076] Embodiment 2

[0077] Reference Figure 1 , Figure 2 and Figure 3 , Example 2 further illustrates a charging pile control system based on digital twin proposed by the present invention.

[0078] A database module is used to obtain historical data of multiple charging piles where fuses have blown, wherein the historical data of the charging piles includes historical temperatures of the fuse terminals and historical charging currents of the charging piles, and a relationship between the historical temperatures of the fuse terminals and the historical charging currents of the charging piles is constructed based on the historical temperatures of the fuse terminals and the historical charging currents of the charging piles;

[0079] Among them, constructing a relationship between the fuse terminal historical temperature and the charging pile historical charging current includes the following steps:

[0080] S20, the historical temperature of the fuse terminal is preset to be in a linear relationship with the charging current of the charging pile, and the proportional coefficient K in multiple time intervals is obtained through the historical data of the fuse terminal temperature of the charging pile under constant voltage and different charging currents. Then, the formula of the proportional coefficient K is:

[0081] K=(Q-α) / I,

[0082] Where Q is the fuse terminal temperature, K is the proportionality coefficient, and α is the current internal temperature of the charging pile;

[0083] S21, calculating multiple proportional coefficients K through K-Center Calculating to obtain a center point value K;

[0084] S22. Substitute the center point value K into the formula of S20 to obtain the relationship between the fuse terminal temperature and the charging current of the charging pile: Q = KI + α;

[0085] An extraction module extracts current variation characteristics based on the historical charging current of the charging pile, and obtains the maximum safe temperature of the fuse terminal through the current variation characteristics;

[0086] Among them, the current change characteristics are extracted based on the historical charging current of the charging pile, including:

[0087] S30, preset the formula with current change characteristics, BHI=I i -I i+1 ,

[0088] Where BHI is the value of the changing current, i is the time point, I i is the current corresponding to time point i, I i+1 is the current corresponding to time point i+1;

[0089] S31, extracting the time interval with constant voltage and constant input current in the historical data, and inputting the current in the time interval into the above formula;

[0090] S32. If BHI>0, mark the fuse terminal temperature and charging current of the charging pile corresponding to the current change characteristics;

[0091] The maximum safe temperature of the fuse terminal is obtained through the current variation characteristics, including,

[0092] S40, obtaining the lowest temperature among the fuse terminal temperatures corresponding to the multiple current change characteristics, recording the lowest temperature as the lowest temperature sample, and taking one decimal place for the lowest temperature;

[0093] S41, sorting multiple lowest temperature samples from low to high temperature, and sorting the samples with the same lowest temperature in parallel;

[0094] S42, the number of times a plurality of samples with the same minimum temperature are obtained;

[0095] S43, if the number of times the same minimum temperature occurs is less than 2% of the total number of samples, the minimum temperature is deleted; if the number of times the same minimum temperature occurs is greater than or equal to 2% of the total number of samples, this minimum temperature is the maximum safe temperature and is marked as Qmax;

[0096] For example, the lowest temperatures corresponding to multiple BHIs are 78.1, 79.2, 81.3, 82.1, 79.2, 82.3, 78.2, 82.3, 81.3, and 79.4. Then, the order is 78.1, 78.2, 79.2, 79.2, 79.4, 81.3, 81.3, 82.1, 82.3, and 82.3. Delete 78.2 and 78.1, and the lowest temperature corresponding to multiple BHIs should be 79.2.

[0097] A determination and selection module is used to obtain the trend characteristics of the current fuse terminal temperature, and output a signal corresponding to the current fuse terminal temperature based on the trend characteristics, wherein the corresponding signal includes a normal signal, an emergency reminder signal, and an adjustment signal;

[0098] Wherein, obtaining the trend characteristics of the current fuse terminal temperature includes the following steps:

[0099] S50, setting a time period, there are N unit times, and obtaining the current fuse terminal temperature once in each unit time;

[0100] Among them, the time period is marked as C, the reserved buffer temperature interval is marked as Qs, the specific value of the reserved buffer temperature interval Qs is set by the user according to the actual situation, and the average temperature rise rate is marked as V 平均 , then, C <Qs / V 平均 , that is, the maximum duration of the time period is less than the reserved buffer temperature interval Qs divided by the average temperature rise rate, and the average temperature rise rate is the average temperature rise rate value of the historical fuse terminal temperature;

[0101] S51, mark the next current fuse terminal temperature as Q N+1 , mark the previous current fuse terminal temperature as Q N , via Q 差值 =Q N+1* -Q N , calculate all Q in a time period 差值 , Q difference is the difference between the next current fuse terminal temperature and the previous current fuse terminal temperature;

[0102] S52, if all Q 差值 =0, the temperature is stable;

[0103] S53, if all Q 差值 >0, the temperature rises;

[0104] S54, if all Q 差值 <0, the temperature drops;

[0105] S55. If there are Q 差值 >0, Q 差值 <0, and Q 差值 >0, Q 差值 <0 is the corresponding value of positive and negative, which is temperature oscillation;

[0106] S56. If there are Q 差值 >0, Q 差值 <0, and Q 差值 >0, Q 差值 <0 is a positive or negative value, the last Q 差值 >0 is recorded as temperature rise, the last Q 差值 <0 is recorded as temperature drop;

[0107] For example, within a time period, there are 5 unit times, and the temperatures corresponding to the 5 unit times are 64.5, 64.5, 64.5, 64.5, 64.5, respectively. Then, for each Q 差值 If both are 0, then the trend characteristic of the current fuse terminal temperature in this time period is stable temperature;

[0108] In a time period, there are 5 unit times, and the temperatures corresponding to the 5 unit times are 64.5, 64.6, 64.7, 64.8, and 64.9, respectively. Then, for each Q 差值 If both are 0.1, then the trend characteristic of the current fuse terminal temperature in this time period is temperature rise;

[0109] In a time period, there are 5 unit times, and the temperatures corresponding to the 5 unit times are 64.9, 64.8, 64.7, 64.6, and 64.5, respectively. Then, for each Q 差值 If both are -0.1, then the trend characteristic of the current fuse terminal temperature in this time period is a temperature drop;

[0110] In a time period, there are 5 unit times, and the temperatures corresponding to the 5 unit times are 64.5, 64.6, 64.7, 64.6, and 64.5, respectively. Then, Q 差值 If they are 0.1, 0.1, -0.1, and -0.1 respectively, it is a temperature oscillation;

[0111] In a time period, there are 5 unit times, and the temperatures corresponding to the 5 unit times are 64.5, 64.7, 64.7, 64.4, and 64.3, respectively. Then, Q 差值 If they are 0.2, 0, -0.3, and -0.1 respectively, it means the temperature is decreasing;

[0112] In a time period, there are 5 unit times, and the temperatures corresponding to the 5 unit times are 64.4, 64.2, 64.2, 64.3, and 64.5, respectively. Then, Q 差值 If they are -0.2, 0, 0.1, and 0.2 respectively, it means the temperature rises;

[0113] Outputting a signal corresponding to the current fuse terminal temperature based on the trend characteristics includes the following steps:

[0114] S60. If the trend characteristic of the current fuse terminal temperature in the past time period is that the temperature is stable, and the highest temperature in a time period is less than Qmax-Qs, a normal signal is output, and the charging current of the charging pile entity is not regulated, wherein Qs is a reserved buffer temperature range, and Qmax-Qs<Qmax (the specific value of Qs is set by the user according to the actual situation);

[0115] S61. If the trend characteristic of the current fuse terminal temperature in the past time period is a temperature drop, and the highest temperature in a time period is less than Qmax-Qs, a normal signal is output, and the charging current of the charging pile entity is not regulated;

[0116] S62: If the trend characteristic of the current fuse terminal temperature in the past time period is temperature oscillation, and the highest temperature in a time period is less than Qmax-Qs, a normal signal is output, and the charging current of the charging pile entity is not regulated;

[0117] S63: If the trend characteristic of the current fuse terminal temperature in the past time period is temperature oscillation, and the highest temperature in a time period is greater than or equal to Qmax-Qs, an emergency reminder signal is output to stop charging the charging pile entity;

[0118] S64. If the trend characteristic of the current fuse terminal temperature in the past time period is a temperature rise, and the highest temperature in a time period is less than Qmax-Qs, then an adjustment signal is output, and the charging current of the charging pile entity is regulated by the adjustment signal;

[0119] A control module controls the charging current of the virtual model by adjusting the signal to obtain a virtual control effect, and performs the same control on the charging pile entity according to the virtual control effect;

[0120] Regulate the charging current of the virtual model through the adjustment signal to obtain the virtual regulation effect, and perform the same regulation on the charging pile entity according to the virtual regulation effect, including:

[0121] S70. Obtain the current fuse terminal temperature Q in the current charging pile entity 当前 and the current charging current I of the current charging pile 当前 , and set the expected temperature Q that the fuse terminal temperature needs to be adjusted to 预计 (the internal temperature of the charging pile entity < Q 预计 < Qmax - Qs, and the specific value is set by the user according to the actual situation);

[0122] S71. Through Q 调节 = Q 当前 - Q 预计 , obtain the temperature to be adjusted for the current fuse terminal temperature, denoted as Q 调节 , and through Q = KI + α, obtain the expected reduced charging current I of the charging pile entity 调节 ;

[0123] S72. Reduce the charging current I of the virtual model corresponding to the current charging pile entity 调节 , and preset the expected time T through the historical data of the charging pile 预计 ;

[0124] The obtaining of the expected time T 预计 includes obtaining the historical temperature average decrease rate of the fuse terminal temperature after reducing the charging current through the historical data of the charging pile, denoted as V 预计 ; then dividing the temperature Q 调节 by V 预计 , to obtain the expected time T 预计 ;

[0125] S73. After regulating the virtual model for the expected time T 预计 , obtain the virtual regulation effect Q 虚拟 , and compare the virtual regulation effect Q 虚拟 with the expected temperature Q 预计 ;

[0126] S74. If within the expected time T 预计 , Q 虚拟 < Q 预计 , it is considered that the expected temperature is reached, and then apply it to the charging pile entity to regulate the charging current of the charging pile entity;

[0127] S75. If within the expected time T 预计 , Q 虚拟 > Q 预计, it is considered that the expected temperature has not been reached, and steps S71 to S75 are repeated until the expected temperature Q is reached. 预计 ;

[0128] In this embodiment, by extracting the current change characteristics, the maximum safe temperature of the current fuse terminal can be obtained, and the maximum safe temperature can be used to preset the reserved buffer temperature range of the charging pile during charging. According to the maximum safe temperature, the reserved buffer temperature range and the current fuse terminal temperature trend characteristics within a time period, a corresponding signal is output, and it is determined whether to adjust the charging current of the charging pile entity based on the output signal, thereby reducing the risk of the charging pile entity causing the fuse to blow due to excessive current during charging, thereby ensuring the safety of the charging pile entity during charging; by pre-regulating the charging pile entity in the virtual model before regulating the charging pile entity, and applying it to the charging pile entity when the expected temperature is reached, the regulation inside the charging pile entity can be more accurate and safer, wherein the virtual model can facilitate the testing and detection of the regulation, so as to provide better regulation for the charging pile entity.

[0129] Embodiment 3

[0130] Reference Figure 1 , Figure 2 and Figure 3 , Example 3 further illustrates a charging pile control system based on digital twin proposed by the present invention.

[0131] In the extraction module, it also includes obtaining the current change feature times based on the current change feature;

[0132] The method of obtaining the current change characteristic times based on the current change characteristic comprises the following steps:

[0133] S80, recording the number of times BH I>0 for each fuse under constant voltage and constant charging current;

[0134] S81, BH I>0 is the number of times each fuse has current variation characteristics before it blows;

[0135] S82, record the number of current change characteristics as M;

[0136] Calculate the average current change feature Mpj of each fuse before it blows. When the fuse differs from the average current change feature Mpj by 20%, mark the current fuse as a fuse to be repaired. The number of the fuse to be repaired, the internal area of ​​the charging pile where it is located, and the location of the charging pile are all sent to the maintenance personnel.

[0137] Each charging pile entity has a unique number, and each fuse inside the charging pile has a number and a corresponding area inside the charging pile;

[0138] In this embodiment, by obtaining the average current change characteristic times of each fuse, maintenance personnel can be reminded when the average current change characteristics of the fuse occur a certain number of times, which facilitates maintenance personnel to repair or replace the fuse and reduces the situation where the fuse suddenly blows.

[0139] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0140] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

[0141] It should also be noted that in the apparatus, device and method of the present application, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0142] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0143] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

[0144] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A charging pile control system based on digital twin, characterized in that: It includes: a collection and construction module, which collects data of charging pile entities in the current area, and constructs a digital twin model of the charging pile entity in a virtual space based on a one-to-one mapping of the data of the charging pile entity, which is recorded as a virtual model; A database module is used to obtain historical data of multiple charging piles where fuses have blown, wherein the historical data of the charging piles includes historical temperatures of the fuse terminals and historical charging currents of the charging piles, and a relationship between the historical temperatures of the fuse terminals and the historical charging currents of the charging piles is constructed based on the historical temperatures of the fuse terminals and the historical charging currents of the charging piles; An extraction module extracts current variation characteristics based on the historical charging current of the charging pile, and obtains the maximum safe temperature of the fuse terminal through the current variation characteristics; A determination and selection module is used to obtain the trend characteristics of the current fuse terminal temperature, and output a signal corresponding to the current fuse terminal temperature based on the trend characteristics, wherein the corresponding signal includes a normal signal, an emergency reminder signal, and an adjustment signal; A control module controls the charging current of the virtual model by adjusting the signal to obtain a virtual control effect, and performs the same control on the charging pile entity according to the virtual control effect; The current variation characteristics are extracted based on the historical charging current of the charging pile, include, The formula BHI=I is preset to have current variation characteristics i -I i+1 , Where BHI is the value of the changing current, i is the time point, I i is the current corresponding to time point i, I i+1 is the current corresponding to time point i+1; Extract the time interval with constant voltage and constant input current in the historical data, and input the current in the time interval into the above formula; If BHI>0, the fuse terminal temperature and charging current of the charging pile corresponding to this current change characteristic are marked; The method of obtaining the maximum safe temperature of the fuse terminal through the current variation characteristics includes: Obtain the lowest temperature among the fuse terminal temperatures corresponding to the multiple current change characteristics, record the lowest temperature as the lowest temperature sample, and take one decimal place for the lowest temperature; Sort multiple lowest temperature samples from low to high temperature, and sort the samples with the same lowest temperature in parallel; The number of times multiple samples with the same minimum temperature are obtained; If the number of times the same minimum temperature occurs is less than 2% of the total number of samples, the minimum temperature will be deleted; if the number of times the same minimum temperature occurs is greater than or equal to 2% of the total number of samples, this minimum temperature is the maximum safe temperature and is marked as Qmax; The relationship between the fuse terminal historical temperature and the charging pile historical charging current is constructed based on the fuse terminal historical temperature and the charging pile historical charging current, including: The historical temperature of the fuse terminal is preset to be linearly related to the charging current of the charging pile. The proportional coefficient K in multiple time intervals is obtained through the historical data of the fuse terminal temperature of the charging pile under constant voltage and different charging currents. Then, the formula of the proportional coefficient K is: K=(Q-α) / I, Where Q is the fuse terminal temperature, K is the proportionality coefficient, α is the current internal temperature of the charging pile; I is the charging current; Calculate multiple scale coefficients K through K-CenterClustering to obtain the center point value K; Substituting the center point value K into the formula, we can obtain the relationship between the fuse terminal temperature and the charging current of the charging pile: Q = KI + α.

2. According to the digital twin-based charging pile control system of claim 1, it is characterized in that: The acquisition and construction module obtains the charging pile entity data and environmental data of the charging piles in the current area through the acquisition device, constructs a virtual model based on the one-to-one mapping of the charging pile entity data and the environmental data in the virtual space, establishes a feature sample library of the charging pile entity, and recognizes the features based on the feature sample library to achieve synchronization between the charging pile entity and the virtual model.

3. The charging pile control system based on digital twin according to claim 2 is characterized in that: The obtaining of the trend characteristics of the current fuse terminal temperature includes: There are N unit times in the set time period, and the current fuse terminal temperature is obtained once in each unit time; Mark the next current fuse terminal temperature as Q N+1 , mark the previous current fuse terminal temperature as Q N , via Q 差值 =Q N+1 -Q N , calculate the difference between the two within a time period, Q 差值 is the difference between the next current fuse terminal temperature and the previous current fuse terminal temperature; If all Q 差值 =0, the temperature is stable; If all Q 差值 >0, the temperature rises; If all Q 差值 <0, the temperature drops; If there are Q 差值 >0, Q 差值 <0, and Q 差值 >0, Q 差值 <0 is the corresponding value of positive and negative, which is temperature oscillation; If there are Q 差值 >0, Q 差值 <0, and Q 差值 >0, Q 差值 <0 is a positive or negative value, the last Q 差值 >0 is recorded as temperature rise, the last Q 差值 <0 is recorded as temperature drop.

4. The charging pile control system based on digital twin according to claim 3 is characterized in that: The outputting of a signal corresponding to the current fuse terminal temperature based on the trend feature includes: If the trend characteristic of the current fuse terminal temperature in the past time period is stable temperature, and the highest temperature in a time period is less than Qmax-Qs, then a normal signal is output, and the charging current of the charging pile entity is not regulated, where Qs is the reserved buffer temperature range, and Qmax-Qs<Qmax; If the trend characteristic of the current fuse terminal temperature in the past time period is a temperature drop, and the highest temperature in a time period is less than Qmax-Qs, a normal signal is output and the charging current of the charging pile entity is not regulated; If the trend characteristic of the current fuse terminal temperature in the past time period is temperature oscillation, and the highest temperature in a time period is less than Qmax-Qs, a normal signal is output and the charging current of the charging pile entity is not regulated; If the trend characteristic of the current fuse terminal temperature in the past time period is temperature oscillation, and the highest temperature in a time period is greater than or equal to Qmax-Qs, an emergency reminder signal is output to stop charging the charging pile entity; If the trend characteristic of the current fuse terminal temperature in the past time period is temperature rise, and the highest temperature in a time period is less than Qmax-Qs, an adjustment signal is output, and the charging current of the charging pile entity is regulated by the adjustment signal.

5. The charging pile control system based on digital twin according to claim 4 is characterized in that: The charging current of the virtual model is regulated by adjusting the signal to obtain a virtual regulation effect, and the charging pile entity is regulated in the same manner according to the virtual regulation effect, including: S70, obtaining the current fuse terminal temperature Q in the current charging pile entity 当前 、Current charging current of charging pile I 当前 , set the expected temperature Q to which the fuse terminal temperature needs to be adjusted 预计 ; S71, through Q 调节 =Q 当前 -Q 预计 , the temperature that needs to be adjusted for the current fuse terminal temperature is recorded as Q 调节 , through Q = KI + α, we can get the expected reduction in charging current I of the charging pile entity. 调节 ; S72, reduce the virtual model corresponding to the current charging pile entity by I 调节 The charging current is set according to the charging pile historical data. 预计 ; S73, when estimating the time T for the virtual model 预计 After the regulation, the virtual regulation effect Q is obtained 虚拟 , the virtual control effect Q 虚拟 With the expected temperature Q 预计 Make comparisons; S74. If the estimated time T 预计 Inside, Q 虚拟 预计 , it is considered that the expected temperature has been reached, and then it is applied to the charging pile entity to regulate the charging current of the charging pile entity;​ S75. If the estimated time T 预计 Inside, Q 虚拟 >Q 预计 , it is considered that the expected temperature has not been reached, and steps S71 to S75 are repeated until the expected temperature Q is reached. 预计 .

6. A charging pile control system based on digital twin according to claim 5, characterized in that: In the extraction module, it also includes obtaining the current change feature times based on the current change feature; The current change characteristic times are obtained based on the current change characteristic, include, Record the number of times BHI>0 for each fuse under constant voltage and constant charging current; The number of times BHI>0 is the number of times each fuse has a current change characteristic before it blows; The number of current change characteristics is recorded as M.

7. The charging pile control system based on digital twin according to claim 6 is characterized in that: The average current change characteristic Mpj of each fuse before it blows is calculated. When the difference between the fuse and the average current change characteristic Mpj is 20%, the current fuse is marked as a fuse to be repaired. The number of the fuse to be repaired, the internal area of ​​the charging pile where it is located, and the location of the charging pile are all sent to the maintenance personnel.

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