Electric vehicle charging facility time sequence operation data correction method and system

Abstract

The invention discloses an electric vehicle charging facility time sequence operation data correction method comprising the following steps: S1, collecting the actual operation data of a feeder line where a charging facility is located, and calculating the difference between the actual outgoing line power of the feeder line and the actual power of all distribution transformers under the feeder line; s2, repairing the missing operation data or correcting the actual operation data according to the positive and negative values and the size of a power difference value between the outgoing line power and the actual power; and S3, calculating a deviation value between the actual outgoing line power and the theoretical outgoing line power before and after data correction, and analyzing the effect of the data correction method. According to the method, the correctness and integrity of data can be ensured, and load flow calculation errors caused by data missing or data errors are avoided.

Description

Technical Field

[0001] The present invention relates to the field of charging facility operation data processing, and in particular to a method and system for correcting the timing operation data of an electric vehicle charging facility. Background Art

[0002] With the popularity of electric vehicles and the rapid expansion of the market, charging facilities, as an important part of the electric vehicle industry chain, the accuracy and reliability of their operating data are crucial to ensuring grid stability, optimizing resource allocation, and improving user experience. However, in actual operation, due to various reasons such as equipment aging, communication failures, and human operational errors, the operating data of charging facilities is often missing or deviated, which brings challenges to the management and maintenance of electric vehicle charging facilities.

[0003] In this context, the goal of technicians is to find a method that can accurately calculate the power distribution of the feeder and, on this basis, accurately identify anomalies and deviations in the operating data. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a method and system for correcting the sequential operation data of an electric vehicle charging facility. The purpose is to propose a data correction method for the missing or data error of the sequential operation data of the distribution transformer to which the charging facility belongs during the power flow calculation process. By calculating the difference between the actual outgoing power of the feeder and the power of the distribution transformer to which all charging piles belong, the missing operation data is repaired according to the capacity and the existing operation data is corrected, and the power flow is used for verification. This method can ensure the correctness and integrity of the data and avoid power flow calculation errors caused by missing or error data.

[0005] A technical solution to achieve the above purpose is: a method for correcting the timing operation data of an electric vehicle charging facility, comprising the following steps:

[0006] S1, collect the actual operation data of the feeder where the charging facility is located, and calculate the difference between the actual outgoing power of the feeder and the actual power of all distribution transformers under the feeder;

[0007] S2, repairing the missing operation data or correcting the actual operation data according to the positive and negative sign and magnitude of the power difference between the outgoing power and the actual power;

[0008] S3, calculating the deviation between the actual outgoing power and the theoretical outgoing power before and after the data correction, and analyzing the effectiveness of the data correction method.

[0009] Furthermore, the actual operation data of the feeder where the charging facility is located in step S1 includes distribution network topology information, transformer and conductor segment parameters, bus distribution transformer, charging pile and other load operation data under the distribution transformer provided by the feeder network and charging facility operator.

[0010] Furthermore, the actual power is calculated as:

[0011] P 实际出线 =U 实际出线 *I 实际出线

[0012] P 实际出线 is the actual outgoing power of the feeder where the charging facility is located before data correction, U 实际出线 is the actual outgoing line voltage of the feeder where the charging facility is located before data correction, I 实际出线 The actual outgoing current of the feeder where the charging facility is located before data correction;

[0013] P 有 i =U 有 i *I 有 i

[0014]

[0015] ΔP=P 实际出线 -P all

[0016] P 有 i is the actual power of the ith distribution transformer with operating data, U 有 i is the actual voltage of the ith distribution transformer with operating data, I 有 i is the actual current of the ith distribution transformer with operating data, P all It is the sum of the actual powers of all distribution transformers with operating data, and ΔP is the difference between the actual outgoing power of the feeder and the sum of the actual powers of all distribution transformers with operating data under the feeder.

[0017] Furthermore, the correction method in step S2 is specifically as follows: if the difference is positive and greater than the line loss, the excess portion is allocated according to the capacity ratio of the distribution transformer whose operating data is missing, and the operating data is repaired; if the difference is negative, the difference is allocated according to the capacity of the distribution transformer load to which the existing operating data belongs, and the actual operating data of the distribution transformer is corrected until the difference is positive and equal to the line loss.

[0018] Furthermore, in step S2, if the difference is positive, the specific repair method is:

[0019] When ΔP>P 实际出线 *5%

[0020]

[0021] C 无i is the capacity of the i-th distribution transformer without operating data, C 无 all is the sum of the capacity of all distribution transformers without operating data, P 无校正前 i is the actual power of the ith distribution transformer without operating data before correction, P 无校正后 i It is the actual power after correction of the data of the i-th distribution transformer without operating data.

[0022] Furthermore, in step S2, if the difference is negative, the specific repair method is:

[0023] When ΔP<0:

[0024]

[0025] C 有 i is the capacity of the i-th distribution transformer with operating data, C 有 all is the sum of the capacity of all distribution transformers with operating data, P 有校正前 i is the actual power of the ith distribution transformer without operating data before correction, P 有校正后 i It is the actual power after correction of the i-th distribution transformer data with operating data.

[0026] Furthermore, the specific method for analyzing the effectiveness of the data correction method is to calculate the actual outgoing line power before and after the data correction, calculate the theoretical outgoing line power curve of the feeder before and after the data correction through the power flow, compare the deviation value between the actual outgoing line power and the theoretical outgoing line power before and after the data correction, and verify the effectiveness of the data correction.

[0027] Furthermore, if the outgoing line power deviation value after data correction is less than the deviation value before data correction, the data correction method is effective and its effectiveness is analyzed:

[0028] P before data correction 无校正前 i and P 有校正前 i Perform power flow calculation and obtain P 理论出线 校正前 ;

[0029] After correcting the data, P 无校正后 i and P 有校正后 i Perform power flow calculation and obtain P 理论出线 校正后 ;

[0030] ΔP 出线校正前 =P 理论出线 校正前 -P 实际出线

[0031] ΔP 出线 校正后 =P 理论出线 校正后 -P 实际出线

[0032] If ΔP 出线 校正后 <ΔP 出线 校正前 , then the data correction method is effective, and the effectiveness is based on ΔP 出线 校正后 / ΔP 出线 校正前 Conduct an assessment.

[0033] Furthermore, if the deviation value after data correction is greater than the deviation value before data correction, the process returns to step S1 to detect the data source.

[0034] A technical solution to achieve the above-mentioned purpose also includes a system for correcting the timing operation data of an electric vehicle charging facility, the system including a memory, a processor, and a computer program stored in the memory and executable on the processor, and the computer program, when executed by the processor, implements the steps of a method for correcting the timing operation data of an electric vehicle charging facility as described in any one of claims 1 to 9.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] The method for correcting the timing operation data of electric vehicle charging facilities proposed in the present invention solves the problem of missing and deviation in the operation data of charging facilities. By deeply analyzing the historical operation curve and using power flow simulation technology to accurately calculate the power distribution, the method can efficiently identify and correct errors in the operation data to ensure the accuracy and integrity of the data. In addition, the present invention realizes the precise repair of missing data and accurate correction of existing data through the reasonable allocation of positive and negative deviations, thereby improving the operating efficiency and reliability of charging facilities. This method not only embodies a high degree of creativity, but also provides strong support for the optimized management of electric vehicle charging facilities, and has significant practical application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 The present invention is a method flow chart of a method for correcting sequential operation data of an electric vehicle charging facility. DETAILED DESCRIPTION

[0038] In order to better understand the technical solution of the present invention, the following is a detailed description through specific embodiments:

[0039] See also Figure 1 The present invention provides a method for correcting the timing operation data of an electric vehicle charging facility, comprising the following steps:

[0040] S1, the power grid and charging facility operators provide distribution network topology information, transformer and conductor segment parameters, busbar, distribution transformer and charging pile and other load operation data under the distribution transformer, and integrate the above data to form input data for import into the system. By analyzing the actual outgoing line operation timing curves of the feeder and all distribution transformers under the feeder, the difference between the actual outgoing line power of the feeder and the actual power of all distribution transformers is calculated.

[0041] The actual power is calculated as:

[0042] P 实际出线 =U 实际出线 *I 实际出线

[0043] P 实际出线 is the actual outgoing power of the feeder where the charging facility is located before data correction, U 实际出线 is the actual outgoing line voltage of the feeder where the charging facility is located before data correction, I 实际出线 The actual outgoing current of the feeder where the charging facility is located before data correction;

[0044] P 有 i =U 有 i *I 有 i

[0045]

[0046] ΔP=P 实际出线 -P all

[0047] P 有 i is the actual power of the ith distribution transformer with operating data, U 有 i is the actual voltage of the ith distribution transformer with operating data, I 有 i is the actual current of the ith distribution transformer with operating data, P all It is the sum of the actual powers of all distribution transformers with operating data, and ΔP is the difference between the actual outgoing power of the feeder and the sum of the actual powers of all distribution transformers with operating data under the feeder.

[0048] S2, repairing the missing operation data or correcting the actual operation data according to the positive or negative sign and the magnitude of the power difference between the outgoing power and the actual power.

[0049] If the difference is positive and greater than the line loss, the excess will be allocated according to the distribution transformer capacity where the operating data is missing, and the operating data will be repaired. The specific repair method is:

[0050] When ΔP>P 实际出线 *5%

[0051]

[0052] C 无 i is the capacity of the i-th distribution transformer without operating data, C 无 all is the sum of the capacity of all distribution transformers without operating data, P 无校正前 i is the actual power of the ith distribution transformer without operating data before correction, P 无校正后 i It is the actual power after correction of the data of the i-th distribution transformer without operating data.

[0053] If the difference is negative, distribute the difference according to the capacity of the distribution transformer load to which the existing operating data belongs, and correct the actual operating data of the distribution transformer until the difference is positive and equal to the line loss. The specific repair method is:

[0054] When ΔP<0:

[0055]

[0056] C 有 i is the capacity of the i-th distribution transformer with operating data, C 有 all is the sum of the capacity of all distribution transformers with operating data, P 有校正前 i is the actual power of the ith distribution transformer without operating data before correction, P 有校正后 i It is the actual power after correction of the i-th distribution transformer data with operating data.

[0057] S3, calculate the actual outgoing power before and after data correction. Calculate the theoretical outgoing power curve of the feeder before and after data correction through power flow. Compare the deviation value between the actual outgoing power and the theoretical outgoing power before and after data correction to verify the validity of data correction.

[0058] If the outgoing line power deviation value after data correction is less than the deviation value before data correction, the data correction method is effective and its effectiveness is analyzed:

[0059] P before data correction 无校正前 i and P 有校正前 i Perform power flow calculation and obtain P理论出线 校正前 ;

[0060] After correcting the data, P 无校正后 i and P 有校正后 i Perform power flow calculation and obtain P 理论出线 校正后 ;

[0061] ΔP 出线 校正前 =P 理论出线 校正前 -P 实际出线

[0062] ΔP 出线 校正后 =P 理论出线 校正后 -P 实际出线

[0063] If ΔP 出线 校正后 <ΔP 出线 校正前 , then the data correction method is effective, and the effectiveness is based on ΔP 出线 校正后 / ΔP 出线 校正前 Conduct an assessment.

[0064] If the deviation value after data correction is greater than the deviation value before data correction, the process returns to step S1 to detect the data source. According to the detection result, the data correction method is further optimized.

[0065] Another embodiment of the present invention relates to a system for correcting the timing operation data of an electric vehicle charging facility, the system comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program, when executed by the processor, implements the steps of the above-mentioned method for correcting the timing operation data of an electric vehicle charging facility.

[0066] The present invention proposes a method for correcting the sequential operation data of electric vehicle charging facilities. The method can accurately calculate the power distribution of the feeder by deeply analyzing the historical operation curve of the charging facilities and using advanced power flow simulation technology. On this basis, the difference between the actual outgoing power of the feeder and the outgoing power calculated by the power flow is calculated through a top-down statistical method, so as to accurately identify the anomalies and deviations of the operation data.

[0067] For missing operation data, the present invention adopts a positive deviation allocation strategy to repair it. Specifically, according to the capacity of the distribution transformer to which the missing data belongs, the positive deviation is proportionally allocated to the corresponding distribution transformer, thereby achieving reasonable estimation and repair of the missing data. For the deviations existing in the existing operation data, the present invention adopts a negative deviation allocation strategy to correct it. By allocating according to the capacity of the distribution transformer to which the existing data belongs, it is ensured that the corrected data is closer to the actual operation situation.

[0068] The invention not only provides a new and effective method for the operation data correction of electric vehicle charging facilities, but also provides strong support for improving the operation efficiency of charging facilities, ensuring the safety and stability of the power grid, and optimizing resource allocation. At the same time, the implementation of this method will also help promote the healthy development of the electric vehicle industry and contribute to the construction of a green and low-carbon energy system.

[0069] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention, and are not intended to limit the present invention. As long as they are within the spirit of the present invention, any changes or modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. A method for correcting the timing operation data of an electric vehicle charging facility, characterized in that: The steps include: S1, collect the actual operation data of the feeder where the charging facility is located, and calculate the difference between the actual outgoing power of the feeder and the actual power of all distribution transformers under the feeder; S2, repairing the missing operation data or correcting the actual operation data according to the positive and negative sign and magnitude of the power difference between the outgoing power and the actual power; S3, calculating the deviation between the actual outgoing power and the theoretical outgoing power before and after the data correction, and analyzing the effectiveness of the data correction method.

2. A method for correcting the timing operation data of an electric vehicle charging facility according to claim 1, characterized in that: The actual operation data of the feeder where the charging facility is located in step S1 includes the distribution network topology information, transformer and conductor segment parameters, bus distribution transformer and charging pile and other load operation data under the distribution transformer provided by the feeder network and charging facility operator.

3. A method for correcting the timing operation data of an electric vehicle charging facility according to claim 1, characterized in that: The actual power is calculated as: P 实际出线 =U 实际出线 *AND 实际出线 P 实际出线 is the actual outgoing power of the feeder where the charging facility is located before data correction, U 实际出线 is the actual outgoing line voltage of the feeder where the charging facility is located before data correction, I 实际出线 The actual outgoing current of the feeder where the charging facility is located before data correction; P 有 i =U 有 i *AND 有 i ΔP=P 实际出线 -P all P 有 i is the actual power of the ith distribution transformer with operating data, U 有 i is the actual voltage of the ith distribution transformer with operating data, I 有 i is the actual current of the ith distribution transformer with operating data, P all It is the sum of the actual powers of all distribution transformers with operating data, and ΔP is the difference between the actual outgoing power of the feeder and the sum of the actual powers of all distribution transformers with operating data under the feeder.

4. The method for correcting the timing operation data of an electric vehicle charging facility according to claim 1, characterized in that: The correction method in step S2 is specifically as follows: if the difference is positive and greater than the line loss, the excess part is allocated according to the capacity ratio of the distribution transformer whose operating data is missing, and the operating data is repaired; if the difference is negative, the difference is allocated according to the capacity of the distribution transformer load to which the existing operating data belongs, and the actual operating data of the distribution transformer is corrected until the difference is positive and equal to the line loss.

5. A method for correcting the timing operation data of an electric vehicle charging facility according to claim 4, characterized in that: In step S2, if the difference is positive, the specific repair method is: When ΔP>P 实际出线 *5% C 无 i is the capacity of the i-th distribution transformer without operating data, C 无 all is the sum of the capacity of all distribution transformers without operating data, P 无校正前 i is the actual power of the ith distribution transformer without operating data before correction, P 无校正后 i It is the actual power after correction of the data of the i-th distribution transformer without operating data.

6. A method for correcting the timing operation data of an electric vehicle charging facility according to claim 4, characterized in that: In step S2, if the difference is negative, the specific repair method is: When ΔP<0: C 有 i is the capacity of the i-th distribution transformer with operating data, C 有 all is the sum of the capacity of all distribution transformers with operating data, P 有校正前 i is the actual power of the ith distribution transformer without operating data before correction, P 有校正后 i It is the actual power after correction of the i-th distribution transformer data with operating data.

7. A method for correcting the timing operation data of an electric vehicle charging facility as claimed in claim 1, characterized in that: The specific method for analyzing the effectiveness of the data correction method is to calculate the actual outgoing line power before and after the data correction, calculate the theoretical outgoing line power curve of the feeder before and after the data correction through the power flow, compare the deviation value between the actual outgoing line power and the theoretical outgoing line power before and after the data correction, and verify the effectiveness of the data correction.

8. A method for correcting the timing operation data of an electric vehicle charging facility as claimed in claim 7, characterized in that: If the outgoing line power deviation value after data correction is less than the deviation value before data correction, the data correction method is effective and its effectiveness is analyzed: P before data correction 无校正前 i and P 有校正前 i Perform power flow calculation and obtain P 理论出线 校正前 ; After correcting the data, P 无校正后 i and P 有校正后 i Perform power flow calculation and obtain P 理论出线 校正后 ; ΔP 出线 校正前 =P 理论出线 校正前 -P 实际出线 ΔP 出线 校正后 =P 理论出线 校正后 -P 实际出线 If ΔP 出线 校正后 <ΔP 出线 校正前 , then the data correction method is effective, and the effectiveness is based on ΔP 出线 校正后 / ΔP 出线 校正前 Conduct an assessment.

9. A method for correcting the timing operation data of an electric vehicle charging facility as claimed in claim 7, characterized in that: If the deviation value after data correction is greater than the deviation value before data correction, the process returns to step S1 to detect the data source.

10. A system for correcting the timing operation data of an electric vehicle charging facility, the system comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the computer program is executed by a processor, the steps of a method for correcting timing operation data of an electric vehicle charging facility as described in any one of claims 1 to 9 are implemented.

Images