Charging pile performance evaluation method and device and electronic equipment

Abstract

The invention discloses a charging pile performance evaluation method and device and electronic equipment. Relates to the field of charging piles. The method comprises the steps that an interaction information matrix is established, the interaction information matrix comprises a matrix constructed based on charging data of charging of a plurality of electric vehicles on a plurality of reference piles and charging data of charging of the plurality of electric vehicles on an evaluated pile, and the reference piles comprise charging piles subjected to performance evaluation; based on the working errors of the plurality of reference piles and the initial working error of the evaluated pile, correcting the interaction information matrix to obtain a corrected interaction information matrix; based on the corrected interaction information matrix, correcting the initial working error of the evaluated pile to obtain a corrected initial working error; and determining a target working error of the evaluated pile based on the corrected initial working error. According to the invention, the technical problem that the evaluation efficiency is low when the performance of the charging pile is evaluated in a field verification mode in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the field of charging piles, and in particular to a charging pile performance evaluation method, device and electronic equipment. Background Art

[0002] At present, it is necessary to calibrate the charging and discharging facilities in operation (for example, charging piles) regularly to ensure the safety of the charging and discharging facilities. In the relevant technology, the metrological calibration method used for the charging and discharging facilities is mainly that professional metrological calibration personnel carry multiple charging and discharging facility on-site calibration devices, and use the actual load calibration method at the site where the charging and discharging facilities are installed to calibrate the metrological performance of all the charging and discharging facilities in operation one by one. There are disadvantages such as large calibration loss, low efficiency and high cost. In addition, the charging and discharging facilities in operation come from many manufacturers, and are characterized by scattered distribution, wide coverage, large quantity and uneven quality. With the rapid growth in the number of electric vehicles, the existing calibration methods can no longer meet the needs of periodic calibration, and it is extremely difficult to implement performance calibration.

[0003] To address the above-mentioned problems, no effective solution has been proposed yet. Summary of the invention

[0004] The embodiments of the present invention provide a charging pile performance evaluation method, device and electronic device, so as to at least solve the technical problem of low evaluation efficiency in evaluating the performance of the charging pile by on-site verification in the related art.

[0005] According to one aspect of an embodiment of the present invention, a charging pile performance evaluation method is provided, comprising: establishing an interactive information matrix, wherein the interactive information matrix comprises: a matrix constructed based on charging data of multiple electric vehicles charging on multiple reference piles and charging data of multiple electric vehicles charging on evaluated piles, wherein the reference piles comprise: charging piles that have been performance evaluated by on-site calibration, and the evaluated piles comprise: charging piles to be performance evaluated; based on working errors of multiple reference piles and initial working errors of the evaluated piles, the interactive information matrix is ​​corrected to obtain a corrected interactive information matrix, wherein the initial working error of the evaluated pile comprises: the working error obtained by the last performance evaluation of the evaluated pile; based on the corrected interactive information matrix, the initial working error of the evaluated pile is corrected to obtain a corrected initial working error; based on the corrected initial working error, a target working error of the evaluated pile is determined, wherein the target working error of the evaluated pile is used to represent the evaluation result of the performance evaluation of the evaluated pile this time.

[0006] Furthermore, based on the corrected interaction information matrix, the initial working error of the evaluated pile is corrected to obtain the corrected initial working error, including: based on the corrected interaction information matrix, determining the virtual electric energy standard estimate value of each of the electric vehicles, wherein the virtual electric energy standard estimate value of each of the electric vehicles is used to represent the estimated value of the electric energy corresponding to the unit state of charge of the electric vehicle; based on the virtual electric energy standard estimate value of each of the electric vehicles and the corrected interaction information matrix, the initial working error of the evaluated pile is corrected to obtain the corrected initial working error.

[0007] Furthermore, based on the revised interaction information matrix, the virtual power standard estimate value of each electric vehicle is determined, including: based on the revised interaction information matrix, calculating the confidence of power metering of multiple reference piles to obtain the power metering confidence of multiple reference piles; based on the power metering confidence of multiple reference piles and the revised interaction information matrix, determining the virtual power standard estimate value of each electric vehicle.

[0008] Furthermore, based on the virtual power energy standard estimation value of each electric vehicle and the corrected interaction information matrix, the initial working error of the evaluated pile is corrected to obtain the corrected initial working error, including: calculating the confidence of the power metering of the evaluated pile based on the power metering confidence of multiple reference piles and the corrected interaction information matrix to obtain the power metering confidence of the evaluated pile; updating the virtual power energy standard estimation value of each electric vehicle based on the power metering confidence of multiple reference piles, the power metering confidence of the evaluated pile and the corrected interaction information matrix to obtain the updated virtual power energy standard estimation value of each electric vehicle; correcting the initial working error of the evaluated pile based on the updated virtual power energy standard estimation value of each electric vehicle and the corrected interaction information matrix to obtain the corrected initial working error.

[0009] Furthermore, after determining the target working error of the evaluated pile based on the corrected initial working error, it also includes: updating the corrected interaction information matrix based on the corrected initial working error to obtain an updated interaction information matrix; updating the electric energy metering confidence of multiple reference piles and the electric energy metering confidence of the evaluated pile based on the corrected initial working error to obtain updated electric energy metering confidence.

[0010] Furthermore, based on the corrected initial working error, the target working error of the evaluated pile is determined, including: based on the corrected initial working error and the initial working error, judging whether to correct the corrected initial working error again to obtain a judgment result; when the judgment result indicates that the corrected initial working error is to be corrected again, based on the corrected initial working error, the updated mutual information matrix and the updated electric energy metering confidence, correcting the corrected initial working error again to obtain a correction result, and determining the target working error of the evaluated pile based on the correction result; when the judgment result indicates that the corrected initial working error does not need to be corrected again, determining the corrected initial working error as the target working error of the evaluated pile.

[0011] Furthermore, establishing an interactive information matrix includes: acquiring charging data of multiple electric vehicles charging on multiple reference piles and charging data of multiple electric vehicles charging on evaluated piles to obtain charging interaction data, wherein the charging data at least includes: the identification of the reference pile, the identification of the evaluated pile, the identification of the electric vehicle, the measured value of the electric energy of each electric vehicle charging on the reference pile and the evaluated pile, and the change in the state of charge of each electric vehicle charging on the reference pile and the evaluated pile; based on the charging interaction data, establishing a virtual electric energy matrix, wherein the elements in the virtual electric energy matrix are used to represent the calculated value of the electric energy corresponding to the unit state of charge; based on the virtual electric energy matrix and the charging interaction data, establishing a standard deviation matrix, wherein the elements in the standard deviation matrix include: standard deviations determined based on the elements in the virtual electric energy matrix; based on the virtual electric energy matrix and the standard deviation matrix, determining the interactive information matrix.

[0012] Furthermore, at least one of the electric vehicles has been charged on both the reference pile and the evaluated pile, and the number of the plurality of reference piles is less than a preset number threshold.

[0013] According to another aspect of an embodiment of the present invention, a charging pile performance evaluation device is further provided, comprising: an establishment unit, configured to establish an interactive information matrix, wherein the interactive information matrix comprises: a matrix constructed based on charging data of multiple electric vehicles charging on multiple reference piles and charging data of multiple electric vehicles charging on evaluated piles, wherein the reference piles comprise: charging piles for which performance evaluation has been performed by on-site verification, and the evaluated piles comprise: charging piles for which performance evaluation is to be performed; a first correction unit, configured to correct the interactive information matrix based on working errors of the multiple reference piles and an initial working error of the evaluated pile, to obtain a corrected interactive information matrix, wherein the initial working error of the evaluated pile comprises: a working error obtained by the last performance evaluation of the evaluated pile; a second correction unit, configured to correct the initial working error of the evaluated pile based on the corrected interactive information matrix, to obtain a corrected initial working error; a determination unit, configured to determine a target working error of the evaluated pile based on the corrected initial working error, wherein the target working error of the evaluated pile is used to represent an evaluation result of the performance evaluation of the evaluated pile this time.

[0014] Furthermore, the second correction unit includes: a first determination subunit, used to determine the virtual power energy standard estimate value of each of the electric vehicles based on the corrected interaction information matrix, wherein the virtual power energy standard estimate value of each of the electric vehicles is used to represent the estimated value of the electric energy corresponding to the unit charge state of the electric vehicle; a correction subunit, used to correct the initial working error of the evaluated pile based on the virtual power energy standard estimate value of each of the electric vehicles and the corrected interaction information matrix, so as to obtain the corrected initial working error.

[0015] Furthermore, the first determination subunit includes: a first calculation module, used to calculate the confidence of the electric energy metering of multiple reference piles based on the corrected interaction information matrix, and obtain the confidence of the electric energy metering of multiple reference piles; a determination module, used to determine the virtual electric energy standard estimate value of each electric vehicle based on the electric energy metering confidence of multiple reference piles and the corrected interaction information matrix.

[0016] Furthermore, the correction subunit includes: a second calculation module, used to calculate the confidence of the energy metering of the evaluated pile based on the energy metering confidence of multiple reference piles and the corrected interaction information matrix, so as to obtain the energy metering confidence of the evaluated pile; an updating module, used to update the virtual energy standard estimation value of each electric vehicle based on the energy metering confidence of multiple reference piles, the energy metering confidence of the evaluated pile and the corrected interaction information matrix, so as to obtain the updated virtual energy standard estimation value of each electric vehicle; a correction module, used to correct the initial working error of the evaluated pile based on the updated virtual energy standard estimation value of each electric vehicle and the corrected interaction information matrix, so as to obtain the corrected initial working error.

[0017] Furthermore, the charging pile performance evaluation device also includes: a first updating unit, which is used to determine the target working error of the evaluated pile based on the corrected initial working error; a second updating unit, which is used to update the corrected interaction information matrix based on the corrected initial working error to obtain an updated interaction information matrix; and a third updating unit, which is used to update the energy metering confidence of multiple reference piles and the energy metering confidence of the evaluated pile based on the corrected initial working error to obtain an updated energy metering confidence.

[0018] Further, the determination unit includes: a judgment subunit, used to judge whether to correct the corrected initial working error again based on the corrected initial working error and the initial working error, and obtain a judgment result; a first processing subunit, used to correct the corrected initial working error again based on the corrected initial working error, the updated mutual information matrix and the updated electric energy metering confidence when the judgment result indicates that the corrected initial working error should be corrected again, and obtain a correction result, and determine the target working error of the evaluated pile based on the correction result; a second processing subunit, used to determine the corrected initial working error as the target working error of the evaluated pile when the judgment result indicates that the corrected initial working error does not need to be corrected again.

[0019] Furthermore, the establishment unit includes: an acquisition subunit, which is used to acquire charging data of multiple electric vehicles charging on multiple reference piles and charging data of multiple electric vehicles charging on evaluated piles, and obtain charging interaction data, wherein the charging data at least includes: the identification of the reference pile, the identification of the evaluated pile, the identification of the electric vehicle, the measured value of the electric energy of each electric vehicle charging on the reference pile and the evaluated pile, and the change in the charge state of each electric vehicle charging on the reference pile and the evaluated pile; a first establishment subunit, which is used to establish a virtual power matrix based on the charging interaction data, wherein the elements in the virtual power matrix are used to represent the calculated value of the electric energy corresponding to the unit charge state; a second establishment subunit, which is used to establish a standard deviation matrix based on the virtual power matrix and the charging interaction data, wherein the elements in the standard deviation matrix include: standard deviations determined based on the elements in the virtual power matrix; a second determination subunit, which is used to determine the interaction information matrix based on the virtual power matrix and the standard deviation matrix.

[0020] Furthermore, at least one of the electric vehicles has been charged on both the reference pile and the evaluated pile, and the number of the plurality of reference piles is less than a preset number threshold.

[0021] According to another aspect of an embodiment of the present invention, there is also provided an electronic device, comprising: a processor; and a memory for storing executable instructions of the processor; wherein the processor is configured to execute any one of the above-mentioned charging pile performance evaluation methods by executing the executable instructions.

[0022] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is provided, which stores a computer program, wherein when the computer program is running, the device where the computer-readable storage medium is located is controlled to execute any one of the above-mentioned charging pile performance evaluation methods.

[0023] In the present invention, an interactive information matrix is ​​established, wherein the interactive information matrix includes: a matrix constructed based on charging data of multiple electric vehicles charging on multiple reference piles and charging data of multiple electric vehicles charging on the evaluated piles, the reference piles include: charging piles that have been subjected to performance evaluation by on-site verification, and the evaluated piles include: charging piles to be subjected to performance evaluation; based on the working errors of multiple reference piles and the initial working errors of the evaluated piles, the interactive information matrix is ​​corrected to obtain a corrected interactive information matrix, wherein the initial working error of the evaluated pile includes: the working error obtained by the last performance evaluation of the evaluated pile; based on the corrected interactive information matrix, the initial working error of the evaluated pile is corrected to obtain a corrected initial working error; based on the corrected initial working error, the target working error of the evaluated pile is determined, wherein the target working error of the evaluated pile is used to represent the evaluation result of the performance evaluation of the evaluated pile this time. Thus, the technical problem of low evaluation efficiency in the related art of evaluating the performance of the charging pile by on-site verification is solved.

[0024] In the present invention, an interactive information matrix is ​​constructed based on the charging data of the electric vehicle at the reference pile and the evaluated pile, and the initial working error of the evaluated pile is corrected by using the interactive information matrix and the working error of the reference pile to obtain the evaluation result of the performance evaluation of the evaluated pile, thereby avoiding the need to conduct performance evaluation of all evaluated piles by on-site calibration in the related technology, and the low evaluation efficiency, thereby achieving the technical effect of improving the performance evaluation efficiency of the charging pile. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0026] Figure 1 is a flow chart of an optional charging pile performance evaluation method according to an embodiment of the present invention;

[0027] Figure 2 is a flow chart of another optional charging pile performance evaluation method according to an embodiment of the present invention;

[0028] Figure 3 is a schematic diagram of an optional charging pile performance evaluation process and formula according to an embodiment of the present invention;

[0029] Figure 4 is a schematic diagram of an optional correspondence between a virtual power matrix, a charging pile and an electric vehicle according to an embodiment of the present invention;

[0030] Figure 5is a schematic diagram of an optional correspondence between a standard deviation matrix, a charging pile and an electric vehicle according to an embodiment of the present invention;

[0031] Figure 6 is a schematic diagram of an optional charging pile performance evaluation device according to an embodiment of the present invention;

[0032] Figure 7 is a schematic diagram of an electronic device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0034] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0035] It should be noted that the user information (including but not limited to user device information, user personal information, etc.), collected information and data (including but not limited to data used for analysis, stored data, displayed data, charging data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, storage, use, processing, transmission, provision, disclosure and application of relevant data comply with the relevant laws, regulations and standards of the relevant regions, take necessary confidentiality measures, do not violate public order and good customs, and provide corresponding operation entrances for users to choose to authorize or refuse.

[0036] Embodiment 1

[0037] According to an embodiment of the present invention, a method embodiment of an optional charging pile performance evaluation method is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0038] Figure 1 is a flow chart of an optional charging pile performance evaluation method according to an embodiment of the present invention, such as Figure 1 As shown, the method comprises the following steps:

[0039] Step S101, establishing an interactive information matrix, wherein the interactive information matrix includes: a matrix constructed based on charging data of multiple electric vehicles charging on multiple reference piles and charging data of multiple electric vehicles charging on evaluated piles, the reference piles include: charging piles that have been performance evaluated by on-site calibration, and the evaluated piles include: charging piles to be performance evaluated.

[0040] The above-mentioned interaction information matrix includes: a matrix constructed based on the charging data of multiple electric vehicles charging on multiple reference piles and the charging data of multiple electric vehicles charging on the evaluated piles. The interaction information matrix may include: an electric energy calculation value matrix corresponding to the unit SOC value (referred to as the "virtual electric energy matrix") and a standard deviation matrix. The standard deviation matrix can be used to record the standard deviation of the electric energy calculation value corresponding to the unit SOC value. In order to improve data quality and ensure the accuracy of the performance evaluation results of the evaluated piles, the vehicle-pile interaction information matrix bundle may only include interaction information in which a single charge causes the SOC value change to be greater than or equal to 50%.

[0041] In this embodiment, the basis for selecting the reference charging pile may include but is not limited to: (1) all evaluated charging piles are associated with the reference charging pile through at least one electric vehicle, and at least one electric vehicle has been charged at both the reference charging pile and the evaluated charging pile; (2) the number of reference charging piles is as small as possible, and the number of times the electric vehicle is charged at the reference charging pile is as large as possible.

[0042] In this embodiment, the electric energy metering interaction information data of multiple electric vehicles and charging piles (reference piles and evaluated piles) during the charging process can be counted, a virtual electric energy matrix and a standard deviation matrix can be established, and a vehicle-pile interaction information matrix bundle (corresponding to the interaction information matrix) can be obtained.

[0043] The calculation formula of the elements in the virtual power matrix is:

[0044]

[0045] Where i is the number of the charging pile (including the reference charging pile (i.e., the reference pile) and the evaluated charging pile); j represents the number of the electric vehicle; Et represents the electric energy value measured by the charging pile during the tth charging of electric vehicle j at the charging pile i; ΔSOC t It is the change of SOC value of electric vehicle during charging process.

[0046] The calculation formula for the elements in the standard deviation matrix is:

[0047]

[0048] Step S102, based on the working errors of multiple reference piles and the initial working error of the evaluated pile, the interaction information matrix is ​​corrected to obtain a corrected interaction information matrix, wherein the initial working error of the evaluated pile includes: the working error obtained by the last performance evaluation of the evaluated pile.

[0049] In this embodiment, the working error of the charging pile may be the ratio of the difference between the actual charging electric energy value of the electric vehicle charged by the charging pile and the charging electric energy value measured by the charging pile to the actual charging electric energy value.

[0050] In this embodiment, the number of charging piles and electric vehicles can be counted, Ns and Nc respectively; then the reference pile is determined based on the following two criteria: (1) all evaluated piles are associated with the reference pile through at least one electric vehicle; (2) the number of reference piles is as small as possible, and the number of times the electric vehicle is charged at the reference pile is as large as possible.

[0051] Furthermore, the charging piles and electric vehicles can be numbered, where the reference piles are numbered from 1 to N. bs ; Then, based on the specified on-site verification method, the working error of the reference pile is determined, and the last verification result (performance evaluation result) can be used as the initial working error of the evaluated pile.

[0052] In this embodiment, the mutual information matrix (ie, the virtual power matrix and the standard deviation matrix) may be corrected with the working error of the reference pile and the initial working error of the evaluated pile to obtain a corrected mutual information matrix.

[0053] The calculation formula of the virtual power matrix element corrected by the working error of the charging pile is:

[0054]

[0055] Among them, k' ij is the correction value; irepresents the working error of charging pile i (including reference pile and evaluated charging pile). It should be noted that, at this time, the working error of the evaluated pile is the initial working error (i.e., the working error obtained by the last performance evaluation of the evaluated pile); the calculation formula for correcting the standard deviation matrix element using the working error of the charging pile is:

[0056]

[0057] Among them, σ' ij is the correction value (i.e., the element in the corrected standard deviation matrix).

[0058] Step S103, based on the corrected mutual information matrix, correct the initial working error of the evaluated pile to obtain a corrected initial working error.

[0059] In this embodiment, the confidence of the reference pile's energy metering can also be determined based on the vehicle-pile interaction information matrix bundle (i.e., the corrected interaction information matrix), and this can be used as a weight coefficient to calculate the estimated value of the true value of the energy corresponding to the unit SOC value of each electric vehicle by weighted averaging, i.e., the virtual energy standard estimated value; the confidence of the energy metering of the evaluated pile can be calculated by combining the virtual energy matrix and the standard deviation matrix. Furthermore, the energy metering interaction information of all piles (reference piles and evaluated piles) and electric vehicles (corresponding to the corrected interaction information matrix) can be used, and the confidence of the charging pile's energy metering can be used as a weight coefficient to update the virtual energy standard estimated value, and the updated virtual energy standard estimated value can be used to correct the initial working error of the evaluated pile.

[0060] Step S104, determining a target working error of the evaluated pile based on the corrected initial working error, wherein the target working error of the evaluated pile is used to represent the evaluation result of the performance of the evaluated pile this time.

[0061] In this embodiment, after obtaining the corrected initial working error, it can also be judged whether the working error value of the evaluated pile tends to be stable. If it is not stable, the corrected initial working error can be further corrected until the working error of the evaluated pile tends to be stable, and the working error of the evaluated pile that tends to be stable is used as the target working error.

[0062] For example, the latest virtual electric energy standard estimate is used to correct the initial working error of the evaluated charging pile. At the same time, the virtual electric energy matrix and standard deviation matrix are corrected, and the confidence of the electric energy metering of all piles is updated. Finally, an iterative calculation method is used until the working error value of the evaluated pile tends to be stable, completing the large-scale evaluation of the electric energy metering performance of the charging pile.

[0063] Through the above steps, in this embodiment, based on the exchange data of the electric vehicle charging at the reference pile and the evaluated pile, an interactive information matrix is ​​constructed, and the initial working error of the evaluated pile is corrected by using the interactive information matrix and the working error of the reference pile, and the evaluation result of the performance evaluation of the evaluated pile is obtained, which avoids the situation in the related art that all the evaluated piles need to be evaluated by on-site verification, and the evaluation efficiency is low, thereby achieving the technical effect of improving the performance evaluation efficiency of the charging pile. And then solves the technical problem of low evaluation efficiency in the related art that the performance of the charging pile is evaluated by on-site verification.

[0064] Optionally, based on the corrected interaction information matrix, the initial working error of the evaluated pile is corrected to obtain the corrected initial working error, including: based on the corrected interaction information matrix, determining the virtual electric energy standard estimate value of each electric vehicle, wherein the virtual electric energy standard estimate value of each electric vehicle is used to represent the estimated value of the electric energy corresponding to the unit charge state of the electric vehicle; based on the virtual electric energy standard estimate value of each electric vehicle and the corrected interaction information matrix, the initial working error of the evaluated pile is corrected to obtain the corrected initial working error.

[0065] The virtual electric energy standard estimate corresponding to each electric vehicle is calculated by weighted average of the interaction data between the electric vehicle and all charging piles. In this embodiment, the confidence of the electric energy metering of the reference pile can also be determined according to the modified interaction information matrix, and this is used as the weight coefficient. By weighted average, the estimated value of the electric energy true value corresponding to the unit SOC value of each electric vehicle is calculated, that is, the virtual electric energy standard estimate; combined with the modified interaction information matrix (that is, the modified virtual electric energy matrix and the standard deviation matrix), the confidence of the electric energy metering of the evaluated pile is calculated; further, the electric energy metering interaction information of all piles (multiple reference piles and evaluated piles) and electric vehicles (that is, the modified interaction information matrix) can be used, and the confidence of the electric energy metering of the charging pile is used as the weight coefficient to update the virtual electric energy standard estimate, and the latest estimate of the virtual electric energy standard estimate is used to correct the initial working error of the evaluated pile to obtain the corrected initial working error.

[0066] Optionally, based on the revised interaction information matrix, the estimated value of the virtual electric energy standard of each electric vehicle is determined, including: based on the revised interaction information matrix, calculating the confidence of the electric energy metering of multiple reference piles to obtain the confidence of the electric energy metering of multiple reference piles; based on the electric energy metering confidence of multiple reference piles and the revised interaction information matrix, determining the estimated value of the virtual electric energy standard of each electric vehicle.

[0067] In an optional example, the calculation formula for the confidence level of charging pile electric energy metering may be:

[0068]

[0069] Among them, Ci represents the confidence level of the electric energy measurement of charging pile i; Xj represents the estimated value of the virtual electric energy standard corresponding to electric vehicle j.

[0070] The calculation formula for the estimated value of the virtual electric energy standard corresponding to electric vehicle j can be:

[0071]

[0072] In another optional example, the confidence level of the reference pile electricity measurement is:

[0073]

[0074] Among them, Ci is the confidence level of the charging pile power metering. Then, based on the confidence level of the reference pile power metering, the virtual power standard estimate corresponding to each electric vehicle is calculated based on the following formula:

[0075]

[0076] Where i:1-N bs Indicates that the value range of i is 1-N bs .

[0077] Optionally, based on the virtual power energy standard estimate of each electric vehicle and the corrected interaction information matrix, the initial working error of the evaluated pile is corrected to obtain the corrected initial working error, including: calculating the confidence of the power metering of the evaluated pile based on the power metering confidence of multiple reference piles and the corrected interaction information matrix to obtain the power metering confidence of the evaluated pile; updating the virtual power standard estimate of each electric vehicle based on the power metering confidence of multiple reference piles, the power metering confidence of the evaluated pile and the corrected interaction information matrix to obtain the updated virtual power standard estimate of each electric vehicle; correcting the initial working error of the evaluated pile based on the updated virtual power standard estimate of each electric vehicle and the corrected interaction information matrix to obtain the corrected initial working error.

[0078] For example, the confidence level of the reference pile electricity metering can be calculated based on the following formula:

[0079]

[0080] Among them, Ci is the confidence level of the charging pile power metering. Then, using the confidence level of the reference pile power metering, the virtual power standard estimate corresponding to each electric vehicle is calculated as:

[0081]

[0082] Among them, Xj is the estimated value of the virtual electric energy standard corresponding to the j-th electric vehicle.

[0083] Furthermore, the formula for evaluating the confidence of the evaluated pile is:

[0084]

[0085] In this embodiment, the evaluation value of the charging pile working error can also be stabilized by iterative calculation. Specifically, the virtual electric energy standard estimation value is first updated based on the following formula:

[0086]

[0087] Then, the updated virtual power labeling estimated value can be used to correct the initial working error of the evaluated pile, wherein the formula for correcting the initial working error of the evaluated pile is:

[0088]

[0089] Optionally, after determining the target working error of the evaluated pile based on the corrected initial working error, it also includes: updating the corrected interaction information matrix based on the corrected initial working error to obtain an updated interaction information matrix; updating the electric energy metering confidence of multiple reference piles and the electric energy metering confidence of the evaluated pile based on the corrected initial working error to obtain updated electric energy metering confidence.

[0090] For example, the interactive information matrix bundle can be corrected based on the calculation formula of the virtual power matrix and the standard deviation matrix, and the formula for updating the confidence of all pile power metering is:

[0091]

[0092] By updating the corrected interactive information matrix and the confidence levels of the reference pile and the evaluated pile in electric energy metering, the corrected initial working error of the evaluated pile can be corrected again when the corrected working error of the evaluated pile has not yet stabilized, until the working error of the evaluated pile tends to stabilize, and the working error of the evaluated pile for this performance test can be obtained.

[0093] Optionally, based on the corrected initial working error, the target working error of the evaluated pile is determined, including: based on the corrected initial working error and the initial working error, judging whether to correct the corrected initial working error again to obtain a judgment result; when the judgment result indicates that the corrected initial working error is to be corrected again, based on the corrected initial working error, the updated interactive information matrix and the updated electric energy metering confidence, the corrected initial working error is corrected again to obtain a correction result, and the target working error of the evaluated pile is determined based on the correction result; when the judgment result indicates that the corrected initial working error does not need to be corrected again, the corrected initial working error is determined as the target working error of the evaluated pile.

[0094] In this embodiment, based on the corrected initial working error and the initial working error, it can be judged whether the corrected initial working error tends to be stable. If it tends to be stable, no further correction is required. If it does not tend to be stable, the corrected initial working error can be corrected again to obtain a judgment result. The formula for determining whether the evaluation value of the working error tends to be stable can be:

[0095]

[0096] in, is the working error of the charging pile numbered i after the lth correction, ε is the preset threshold, when , it can be determined that the working error after the lth correction tends to be stable.

[0097] When the judgment result indicates that the corrected initial working error should be corrected again, the corrected initial working error is corrected again based on the corrected initial working error, the updated mutual information matrix and the updated electric energy metering confidence to obtain a correction result, and the target working error of the evaluated pile is determined based on the correction result, wherein the principle of correcting the corrected initial working error again is the same as the method of correcting the initial working error, and the corrected initial working error is only used as the initial working error. Therefore, the correction process of correcting the corrected initial working error again will not be repeated.

[0098] When the judgment result indicates that the corrected initial working error does not need to be corrected again, the corrected initial working error is determined as the target working error of the evaluated pile.

[0099] Optionally, establishing an interactive information matrix includes: acquiring charging data of multiple electric vehicles charging on multiple reference piles and charging data of multiple electric vehicles charging on evaluated piles to obtain charging interaction data, wherein the charging data includes at least: an identification of the reference pile, an identification of the evaluated pile, an identification of the electric vehicle, a measured value of the electric energy of each electric vehicle charging on the reference pile and the evaluated pile, and a change in the state of charge of each electric vehicle charging on the reference pile and the evaluated pile; establishing a virtual electric energy matrix based on the charging interaction data, wherein elements in the virtual electric energy matrix are used to represent calculated values ​​of electric energy corresponding to a unit state of charge; establishing a standard deviation matrix based on the virtual electric energy matrix and the charging interaction data, wherein elements in the standard deviation matrix include: a standard deviation determined based on elements in the virtual electric energy matrix; and determining an interactive information matrix based on the virtual electric energy matrix and the standard deviation matrix.

[0100] The calculation formula of the elements in the virtual power matrix is:

[0101]

[0102] Wherein, i is the number of the charging pile (including the reference charging pile and the evaluated charging pile) (i.e., the identification of the reference pile and the identification of the evaluated pile); j represents the number of the electric vehicle (i.e., the identification of the electric vehicle); Et represents the electric energy value measured by the charging pile during the t-th charging of the electric vehicle j at the charging pile i (i.e., the measured value of the electric energy of the electric vehicle j when charging at the charging pile i (reference pile or evaluated pile)); ΔSOC t It is the change in the SOC value of the electric vehicle during the charging process (the change in the state of charge of the electric vehicle when charging on the reference pile or the evaluated pile).

[0103] The calculation formula for the elements in the standard deviation matrix is:

[0104]

[0105] Optionally, at least one electric vehicle has been charged at both a reference charging pile and an evaluated charging pile, and the number of the plurality of reference charging piles is less than a preset number threshold.

[0106] In this embodiment, the selection rules of the reference piles may be: (1) the evaluated pile is associated with the reference pile by at least one electric vehicle, for example, at least one electric vehicle has been charged at both the evaluated pile and the reference pile; (2) the number of reference piles is as small as possible, and the number of electric vehicles charged at the reference piles is as large as possible, for example, the number of multiple reference piles is less than a preset number threshold.

[0107] In this embodiment, some charging piles can be selected as reference piles according to the charging behavior of electric vehicles in a certain area, and the working error of the reference piles can be determined by on-site verification. At the same time, the result of the last verification is used as the initial working error of the evaluated piles; the electric energy metering information data of all electric vehicles interacting with the charging piles during the charging process are counted, and a vehicle-pile interaction information matrix bundle is established, including a virtual electric energy matrix and a standard deviation matrix; the vehicle-pile interaction information matrix bundle is corrected by using the working error of the reference pile, and the confidence of the electric energy metering of the reference pile is further determined, and this is used as a weight coefficient to calculate the virtual electric energy standard estimation value corresponding to each electric vehicle, and further, the confidence of the evaluated pile is calculated in combination with the vehicle-pile interaction information matrix bundle; and the electric energy metering interaction information of all piles is used to update the virtual electric energy standard estimation value; the working error of the evaluated charging pile is corrected by using the latest virtual electric energy standard estimation value, and at the same time, the virtual electric energy matrix and the standard deviation matrix are corrected, and the confidence of the electric energy metering of all piles is updated; finally, an iterative calculation method is used until the working error value of the evaluated pile tends to be stable, and the large-scale evaluation of the electric energy metering performance of the charging pile is completed.

[0108] Based on the concept of big data measurement, using vehicle-mounted SOC data as a medium, a pile-to-pile comparison chain is established to achieve efficient transmission of physical electricity benchmarks, which can reduce the manpower, material and time costs under traditional on-site calibration methods, effectively improve the efficiency of charging pile electricity metering performance evaluation, and thus meet the needs of periodic and comprehensive calibration and evaluation of charging pile electricity metering performance.

[0109] Embodiment 2

[0110] The embodiment provides another optional charging pile performance evaluation method, which can evaluate the working error of the charging pile through a digital virtual electric energy standard value, and the digital virtual electric energy standard value comes from a reference pile, and the working error of the reference pile is determined by on-site calibration. Therefore, the essence of this application is to use the on-board SOC as a medium to achieve efficient transmission of the physical benchmark of electric energy.

[0111] In this embodiment, since the resolution of the vehicle-mounted SOC estimation value is 1%, in order to avoid large deviations in the unit electric energy value due to the quantization error of the SOC, the interactive data with a change in the vehicle-mounted SOC value of less than 50% after a single charge can be deleted. When the same electric vehicle has multiple charging behaviors on the same charging pile, when calculating the elements at the corresponding positions of the vehicle-pile interaction information matrix, the multiple charging data can be weighted averaged. Since the greater the change in the SOC value, the smaller the error in the unit electric energy value caused by the low SOC accuracy, the weight coefficient is:

[0112]

[0113] Among them, W iis the weight value corresponding to the i-th charging data, and t is the number of charging times.

[0114] In the implementation of this application, the working error of the charging pile can distinguish between positive and negative errors. The confidence of the charging pile electric energy metering is related to the standard deviation of the electric energy calculation value corresponding to the unit SOC value, and the difference between the electric energy calculation value corresponding to the unit SOC value and the virtual electric energy standard value. The larger the standard deviation of the electric energy calculation value corresponding to the unit SOC value, or the larger the difference between the electric energy calculation value corresponding to the unit SOC value and the virtual electric energy standard value, the lower the confidence of the charging pile electric energy metering. Therefore, the confidence calculation formula of the charging pile electric energy metering can be:

[0115]

[0116] Among them, k i ' j and σ i ' j are the correction values ​​of the virtual power matrix and standard deviation matrix elements, respectively, j It is an estimate of the virtual electric energy standard value.

[0117] In this embodiment, the virtual electric energy standard estimation value corresponding to each electric vehicle can be calculated by weighted average of the interaction data between the electric vehicle and all charging piles, and the weight coefficient can be the confidence level of the charging pile electric energy metering.

[0118] The charging pile performance evaluation method provided in this embodiment can realize the evaluation of charging pile electric energy metering performance by means of big data metering. Compared with the traditional on-site verification method, it greatly reduces the consumption of manpower, material resources and financial resources, and shortens the cycle of comprehensive verification of charging piles.

[0119] Figure 2 is a flow chart of another optional charging pile performance evaluation method according to an embodiment of the present invention, Figure 3 is a schematic diagram of an optional charging pile performance evaluation process and formula according to an embodiment of the present invention, such as Figure 2 and Figure 3 As shown, the charging pile performance evaluation method provided in this embodiment includes the following steps:

[0120] In step S201, the number of charging piles and electric vehicles is first counted, which are Ns and Nc respectively. Then, the reference pile is determined based on the following two criteria: (1) all evaluated piles are associated with the reference pile through at least one electric vehicle; (2) the number of reference piles is as small as possible, and the number of times the electric vehicle is charged at the reference pile is as large as possible;

[0121] Furthermore, the charging piles and electric vehicles are numbered, where the reference piles are numbered from 1 to N. bs; Then, based on the prescribed on-site verification method, the working error of the reference pile is determined, the previous verification result is used as the initial working error of the evaluated pile, and the convergence condition ε is set.

[0122] In step S202, the interaction data of the vehicle SOC value change amount below 50% after a single charge is first deleted, and the virtual power matrix and standard deviation matrix are established based on formula (3) and formula (4) respectively using the vehicle-pile interaction data:

[0123]

[0124] Among them, k ij is an element in the virtual power matrix, i is the charging pile number, j is the electric vehicle number, E t ΔSOC is the measured power value of the charging pile during the tth charging of electric vehicle j at the charging pile i. t is the change in the SOC value of the electric vehicle during the charging process, σ ij are the elements in the standard deviation matrix.

[0125] Furthermore, the original virtual power matrix and standard deviation matrix are corrected using formula (5) and formula (6), respectively:

[0126]

[0127] where k i ' j and σ i ' j is the correction value, γ i is the working error of the charging pile numbered i.

[0128] In step S203, first, the confidence of the reference pile electric energy metering is calculated based on formula (7):

[0129]

[0130] Where Ci is the confidence level of the charging pile power metering. Then, based on the confidence level of the reference pile power metering, the virtual power standard estimate corresponding to each electric vehicle can be calculated based on formula (8):

[0131]

[0132] Among them, Xj is the estimated value of the virtual electric energy standard corresponding to the j-th electric vehicle.

[0133] Furthermore, the confidence of the pile being evaluated can be evaluated using formula (9):

[0134]

[0135] In step S204, the evaluation value of the charging pile working error can be stabilized by iterative calculation. Specifically, the virtual electric energy standard estimation value is first updated based on the following formula:

[0136]

[0137] Then, the updated virtual energy labeling estimate can be used to correct the working error of the evaluated pile based on formula (11):

[0138]

[0139] Furthermore, the interactive information matrix bundle is corrected based on formula (3), and the confidence of the electric energy metering of all charging piles (multiple reference piles and charging piles) is updated based on formula (12):

[0140]

[0141] Finally, step S204 is repeated until the evaluation value of the working error tends to be stable, that is:

[0142]

[0143] In order to further clarify the calculation process of this method, this application provides an example. Figure 4 is a schematic diagram of an optional correspondence between a virtual power matrix, a charging pile and an electric vehicle according to an embodiment of the present invention; Figure 5 is a schematic diagram of an optional correspondence between a standard deviation matrix, a charging pile and an electric vehicle according to an embodiment of the present invention; Figure 4 and Figure 5 As shown, this embodiment includes 5 charging piles (No. 1 and No. 2 are reference piles, and the working errors are 1%, and No. 3, 4, and 5 are tested piles, and the working errors are 2%, -1%, and 1%, respectively) and 10 electric vehicles. Tables 1 to 10 are statistical data of electric vehicle charging information. The condition for the termination of iteration is Furthermore, with k 11 The calculation process of is used as an example to illustrate the process of establishing the virtual power matrix:

[0144]

[0145] Calculate the other elements in the virtual power matrix in turn, and the virtual power matrix is:

[0146]

[0147] In particular, when there is no charging record for an electric vehicle on a certain charging pile, the corresponding element in the virtual matrix should be recorded as 0. 11 The calculation process of is used as an example to illustrate the process of establishing the standard deviation matrix:

[0148]

[0149] Calculate all elements in the standard deviation matrix in turn. The standard deviation matrix is:

[0150]

[0151] In particular, when the electric vehicle has no charging record on a certain charging pile, the corresponding element in the standard deviation matrix should be recorded as 0.

[0152] Furthermore, it is assumed that the working errors of charging piles No. 1 and No. 2 are γ1 = 0.01 and γ2 = 0.01 respectively through the on-site verification method, and the initial values ​​of the working errors of the evaluated piles are Then the corrected unit power matrix and standard deviation matrix are:

[0153]

[0154] Furthermore, the confidence levels C1 and C2 of the benchmark pile electric energy metering are:

[0155]

[0156] Furthermore, the estimated values ​​of virtual electric energy standards corresponding to the 10 electric vehicles determined by the reference piles are:

[0157]

[0158] Furthermore, the confidence of the evaluated pile is determined by the estimated value of the virtual electric energy standard, which are:

[0159]

[0160] Further, entering the iterative operation, let l = 1, firstly, the virtual power standard estimation value can be updated using the initial confidence of the power metering of all charging piles, and the updated virtual power standard estimation values ​​are:

[0161]

[0162] X2=0.1796,X3=0.1892,X4=0.2302,X5=0.2102,X6=0.1991 (31)

[0163] X7=0.1704,X8=0.2398,X9=0.2485,X 10 =0.2108 (32)

[0164] Furthermore, the working error of the evaluated pile is corrected using the new virtual electric energy standard estimated value (the working error of the reference pile is not corrected), and the corrected working errors are:

[0165]

[0166]

[0167]

[0168] Furthermore, the confidence of all pile power metering is updated based on formula (37) using the modified virtual power matrix and standard deviation matrix:

[0169] C1=0.9871, C2=0.9859, C3=0.9856, C4=0.9872, C5=0.9855 (37)

[0170] Furthermore, determine whether the iteration is terminated:

[0171]

[0172] If the termination condition is not met, the next iteration is entered, and the updated parameters are used to repeatedly calculate formulas (27)-(38) until the termination condition is met. This example reaches the termination condition after 2 iterations, and the verification results of the working errors of the evaluated piles are:

[0173] γ3=0.0204, γ4=-0.0087, γ5=0.0094 (39)

[0174] The calibration results are very close to the actual working error of the charging pile, which verifies the rationality of this method.

[0175] Table 1

[0176]

[0177] Table 2

[0178]

[0179] Table 3

[0180]

[0181]

[0182] Table 4

[0183]

[0184] Table 5

[0185]

[0186]

[0187] Table 6

[0188]

[0189] Table 7

[0190]

[0191] Table 8

[0192]

[0193] Table 9

[0194]

[0195] Table 10

[0196]

[0197]

[0198] In this embodiment, the vehicle-mounted SOC value is used to reflect the charging power of the electric vehicle battery pack. With this power as the link, a pile-pile comparison chain is established, thereby realizing the transmission of the working error of the charging pile, and providing a theoretical basis for the large-scale evaluation of the electric energy metering performance of the charging pile. The specific steps include: selecting a reference pile, determining the working error of the reference pile by the on-site verification method, and taking the result of the last verification as the initial working error of the evaluated charging pile; establishing a vehicle-pile interaction information matrix, and using the working error for correction; calculating the initial confidence of all piles for electric energy metering and the virtual electric energy standard estimate; updating the estimated value of the virtual electric energy standard value, correcting the working error of the evaluated charging pile, the interactive information matrix bundle, and updating the confidence; using an iterative calculation method until the evaluation value of the working error tends to be stable, and finally completing the large-scale evaluation of the electric energy metering performance of the charging pile, achieving the technical effect of reducing the human, material and financial consumption brought by the on-site verification method and improving the efficiency of the charging pile performance evaluation.

[0199] Embodiment 3

[0200] Embodiment 3 of the present invention provides an optional charging pile performance evaluation device, and each implementation unit in the charging pile performance evaluation device corresponds to each implementation step in Embodiment 1.

[0201] Figure 6 is a schematic diagram of an optional charging pile performance evaluation device according to an embodiment of the present invention, such as Figure 6As shown, it includes: an establishing unit 61, a first correcting unit 62, a second correcting unit 63 and a determining unit 64.

[0202] The establishing unit 61 is used to establish an interactive information matrix, wherein the interactive information matrix includes: a matrix constructed based on charging data of multiple electric vehicles charging on multiple reference piles and charging data of multiple electric vehicles charging on evaluated piles, the reference piles include: charging piles that have been subjected to performance evaluation by on-site verification, and the evaluated piles include: charging piles to be subjected to performance evaluation;

[0203] A first correction unit 62 is used to correct the interaction information matrix based on the working errors of the plurality of reference piles and the initial working error of the evaluated pile to obtain a corrected interaction information matrix, wherein the initial working error of the evaluated pile includes: the working error obtained by the last performance evaluation of the evaluated pile;

[0204] A second correction unit 63 is used to correct the initial working error of the evaluated pile based on the corrected mutual information matrix to obtain a corrected initial working error;

[0205] The determination unit 64 is used to determine the target working error of the evaluated pile based on the corrected initial working error, wherein the target working error of the evaluated pile is used to represent the evaluation result of the performance of the evaluated pile this time.

[0206] In the charging pile performance evaluation device of the third embodiment of the present invention, an establishing unit 61 can be used to establish an interactive information matrix, wherein the interactive information matrix includes: a matrix constructed based on charging data of multiple electric vehicles charging on multiple reference piles and charging data of multiple electric vehicles charging on evaluated piles, the reference piles include: charging piles that have been performance evaluated by on-site calibration, and the evaluated piles include: charging piles to be performance evaluated, and the interactive information matrix is ​​corrected by the first correction unit 62 based on the working errors of the multiple reference piles and the initial working error of the evaluated pile to obtain a corrected interactive information matrix, wherein the initial working error of the evaluated pile includes: the working error obtained by the last performance evaluation of the evaluated pile, and the initial working error of the evaluated pile is corrected by the second correction unit 63 based on the corrected interactive information matrix to obtain a corrected initial working error, and the target working error of the evaluated pile is determined by the determination unit 64 based on the corrected initial working error, wherein the target working error of the evaluated pile is used to represent the evaluation result of the performance evaluation of the evaluated pile this time. This solves the technical problem of low evaluation efficiency in evaluating the performance of charging piles by on-site verification in related technologies.

[0207] In this embodiment, an interactive information matrix is ​​constructed based on the charging data of the electric vehicle at the reference pile and the evaluated pile, and the initial working error of the evaluated pile is corrected by using the interactive information matrix and the working error of the reference pile to obtain the evaluation result of the performance evaluation of the evaluated pile, thereby avoiding the need for on-site calibration of all evaluated piles for performance evaluation in related technologies and the low evaluation efficiency, thereby achieving the technical effect of improving the performance evaluation efficiency of charging piles.

[0208] Optionally, the second correction unit includes: a first determination subunit, used to determine the virtual electric energy standard estimate value of each electric vehicle based on the corrected interaction information matrix, wherein the virtual electric energy standard estimate value of each electric vehicle is used to represent the estimated value of the electric energy corresponding to the unit charge state of the electric vehicle; a correction subunit, used to correct the initial working error of the evaluated pile based on the virtual electric energy standard estimate value of each electric vehicle and the corrected interaction information matrix, so as to obtain a corrected initial working error.

[0209] Optionally, the first determination subunit includes: a first calculation module, used to calculate the confidence of the electric energy metering of multiple reference piles based on the corrected interaction information matrix, and obtain the confidence of the electric energy metering of multiple reference piles; a determination module, used to determine the virtual electric energy standard estimate of each electric vehicle based on the electric energy metering confidence of multiple reference piles and the corrected interaction information matrix.

[0210] Optionally, the correction subunit includes: a second calculation module, used to calculate the confidence of the energy metering of the evaluated pile based on the energy metering confidence of multiple reference piles and the corrected interaction information matrix, so as to obtain the energy metering confidence of the evaluated pile; an update module, used to update the virtual energy standard estimate of each electric vehicle based on the energy metering confidence of multiple reference piles, the energy metering confidence of the evaluated pile and the corrected interaction information matrix, so as to obtain the updated virtual energy standard estimate of each electric vehicle; a correction module, used to correct the initial working error of the evaluated pile based on the updated virtual energy standard estimate of each electric vehicle and the corrected interaction information matrix, so as to obtain the corrected initial working error.

[0211] Optionally, the charging pile performance evaluation device also includes: a first updating unit, which is used to determine the target working error of the evaluated pile based on the corrected initial working error; a second updating unit, which is used to update the corrected interaction information matrix based on the corrected initial working error to obtain an updated interaction information matrix; and a third updating unit, which is used to update the energy metering confidence of multiple reference piles and the energy metering confidence of the evaluated pile based on the corrected initial working error to obtain an updated energy metering confidence.

[0212] Optionally, the determination unit includes: a judgment subunit, used to judge whether to correct the corrected initial working error again based on the corrected initial working error and the initial working error, and obtain a judgment result; a first processing subunit, used to correct the corrected initial working error again based on the corrected initial working error, the updated mutual information matrix and the updated electric energy metering confidence level when the judgment result indicates that the corrected initial working error should be corrected again, and obtain a correction result, and determine the target working error of the evaluated pile based on the correction result; a second processing subunit, used to determine the corrected initial working error as the target working error of the evaluated pile when the judgment result indicates that the corrected initial working error does not need to be corrected again.

[0213] Optionally, the establishing unit includes: an acquisition subunit, used to acquire charging data of multiple electric vehicles charging on multiple reference piles and charging data of multiple electric vehicles charging on evaluated piles, to obtain charging interaction data, wherein the charging data at least includes: the identification of the reference pile, the identification of the evaluated pile, the identification of the electric vehicle, the measured value of the electric energy of each electric vehicle charging on the reference pile and the evaluated pile, and the change in the charge state of each electric vehicle charging on the reference pile and the evaluated pile; a first establishing subunit, used to establish a virtual electric energy matrix based on the charging interaction data, wherein the elements in the virtual electric energy matrix are used to represent the calculated value of the electric energy corresponding to the unit charge state; a second establishing subunit, used to establish a standard deviation matrix based on the virtual electric energy matrix and the charging interaction data, wherein the elements in the standard deviation matrix include: standard deviations determined based on the elements in the virtual electric energy matrix; a second determining subunit, used to determine the interaction information matrix based on the virtual electric energy matrix and the standard deviation matrix.

[0214] Optionally, at least one electric vehicle has been charged at both a reference charging pile and an evaluated charging pile, and the number of the plurality of reference charging piles is less than a preset number threshold.

[0215] The above-mentioned charging pile performance evaluation device may also include a processor and a memory. The above-mentioned establishment unit 61, first correction unit 62, second correction unit 63 and determination unit 64 are all stored in the memory as program units, and the processor executes the above-mentioned program units stored in the memory to realize corresponding functions.

[0216] The processor includes a kernel, which retrieves the corresponding program unit from the memory. One or more kernels can be set, and the interactive information matrix is ​​constructed based on the exchange data of the electric vehicle charging at the reference pile and the evaluated pile by adjusting the kernel parameters, and the initial working error of the pile to be evaluated is corrected by using the interactive information matrix and the working error of the reference pile, and the evaluation result of the performance evaluation of the pile to be evaluated is obtained, which avoids the need to use on-site verification to perform performance evaluation on all the evaluated piles in the related technology, and the situation of low evaluation efficiency, thereby achieving the technical effect of improving the performance evaluation efficiency of the charging pile.

[0217] The above-mentioned memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one storage chip.

[0218] According to another aspect of an embodiment of the present invention, there is also provided an electronic device, comprising: a processor; and a memory for storing executable instructions of the processor; wherein the processor is configured to execute any one of the above-mentioned charging pile performance evaluation methods by executing the executable instructions.

[0219] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is provided, which stores a computer program, wherein when the computer program is running, the device where the computer-readable storage medium is located is controlled to execute any one of the above-mentioned charging pile performance evaluation methods.

[0220] Figure 7 is a schematic diagram of an electronic device according to an embodiment of the present invention, such as Figure 7 As shown, an embodiment of the present invention provides an electronic device 70, which includes a processor, a memory, and a program stored in the memory and executable on the processor. When the processor executes the program, any one of the above-mentioned charging pile performance evaluation methods is implemented.

[0221] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0222] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0223] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0224] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0225] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0226] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes.

[0227] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A charging pile performance evaluation method, characterized in that: include: Establishing an interactive information matrix, wherein the interactive information matrix includes: a matrix constructed based on charging data of multiple electric vehicles charging on multiple reference piles and charging data of multiple electric vehicles charging on evaluated piles, the reference piles include: charging piles that have been subjected to performance evaluation by on-site verification, and the evaluated piles include: charging piles to be subjected to performance evaluation; Based on the working errors of the plurality of reference piles and the initial working errors of the evaluated piles, the interaction information matrix is ​​corrected to obtain a corrected interaction information matrix, wherein the initial working error of the evaluated pile includes: the working error obtained by the last performance evaluation of the evaluated pile; Based on the corrected mutual information matrix, correcting the initial working error of the evaluated pile to obtain a corrected initial working error; Based on the corrected initial working error, a target working error of the evaluated pile is determined, wherein the target working error of the evaluated pile is used to represent the evaluation result of the performance of the evaluated pile this time.

2. The performance evaluation method according to claim 1, characterized in that: Based on the modified mutual information matrix, the initial working error of the evaluated pile is modified to obtain the modified initial working error, including: Based on the modified interaction information matrix, determining a standard estimated value of virtual electric energy for each electric vehicle, wherein the standard estimated value of virtual electric energy for each electric vehicle is used to represent an estimated value of electric energy corresponding to a unit state of charge of the electric vehicle; Based on the virtual electric energy standard estimation value of each electric vehicle and the corrected interaction information matrix, the initial working error of the evaluated pile is corrected to obtain the corrected initial working error.

3. The performance evaluation method according to claim 2, characterized in that: Determining a virtual electric energy standard estimate value of each electric vehicle based on the modified interactive information matrix includes: Based on the modified interaction information matrix, the confidence levels of the electric energy metering of the plurality of reference piles are calculated to obtain the confidence levels of the electric energy metering of the plurality of reference piles; Based on the electric energy metering confidence levels of the plurality of reference piles and the corrected interaction information matrix, a virtual electric energy standard estimation value of each of the electric vehicles is determined.

4. The performance evaluation method according to claim 3, characterized in that: Based on the virtual electric energy standard estimation value of each electric vehicle and the modified interaction information matrix, the initial working error of the evaluated pile is corrected to obtain the corrected initial working error, including: Based on the electric energy metering confidences of the plurality of reference piles and the modified mutual information matrix, the electric energy metering confidence of the evaluated pile is calculated to obtain the electric energy metering confidence of the evaluated pile; Based on the energy metering confidence of the plurality of reference piles, the energy metering confidence of the evaluated pile and the corrected interaction information matrix, updating the virtual energy standard estimation value of each of the electric vehicles to obtain an updated virtual energy standard estimation value of each of the electric vehicles; Based on the updated virtual electric energy standard estimation value of each electric vehicle and the corrected interaction information matrix, the initial working error of the evaluated pile is corrected to obtain the corrected initial working error.

5. The performance evaluation method according to claim 4, characterized in that: After determining the target working error of the evaluated pile based on the corrected initial working error, the method further includes: Based on the corrected initial working error, the corrected interaction information matrix is ​​updated to obtain an updated interaction information matrix; Based on the corrected initial working error, the electric energy metering confidences of the plurality of reference piles and the electric energy metering confidences of the evaluated piles are updated to obtain updated electric energy metering confidences.

6. The performance evaluation method according to claim 5, characterized in that: Determining a target working error of the evaluated pile based on the corrected initial working error includes: Based on the corrected initial working error and the initial working error, determining whether to correct the corrected initial working error again to obtain a determination result; In the case where the judgment result indicates that the corrected initial working error is to be corrected again, based on the corrected initial working error, the updated mutual information matrix and the updated electric energy metering confidence, the corrected initial working error is corrected again to obtain a correction result, and the target working error of the evaluated pile is determined based on the correction result; When the judgment result indicates that the corrected initial working error does not need to be corrected again, the corrected initial working error is determined as the target working error of the evaluated pile.

7. The performance evaluation method according to claim 1, characterized in that: Establish an interactive information matrix, including: Acquire charging data of multiple electric vehicles charging on multiple reference piles and charging data of multiple electric vehicles charging on evaluated piles to obtain charging interaction data, wherein the charging data at least includes: the identification of the reference pile, the identification of the evaluated pile, the identification of the electric vehicle, the measured value of the electric energy of each electric vehicle charging on the reference pile and the evaluated pile, and the change amount of the charge state of each electric vehicle charging on the reference pile and the evaluated pile; Based on the charging interaction data, a virtual power matrix is ​​established, wherein the elements in the virtual power matrix are used to represent the calculated value of the power corresponding to the unit state of charge; Based on the virtual power matrix and the charging interaction data, a standard deviation matrix is ​​established, wherein the elements in the standard deviation matrix include: standard deviations determined based on the elements in the virtual power matrix; The interaction information matrix is ​​determined based on the virtual power matrix and the standard deviation matrix.

8. The performance evaluation method according to claim 1, characterized in that: At least one of the electric vehicles has been charged on both the reference pile and the evaluated pile, and the number of the plurality of reference piles is less than a preset number threshold.

9. A charging pile performance evaluation device, characterized in that: include: An establishing unit is used to establish an interactive information matrix, wherein the interactive information matrix includes: a matrix constructed based on charging data of multiple electric vehicles charging on multiple reference piles and charging data of multiple electric vehicles charging on evaluated piles, the reference piles include: charging piles that have been subjected to performance evaluation by on-site verification, and the evaluated piles include: charging piles to be subjected to performance evaluation; A first correction unit is used to correct the interaction information matrix based on the working errors of the plurality of reference piles and the initial working error of the evaluated pile to obtain a corrected interaction information matrix, wherein the initial working error of the evaluated pile includes: the working error obtained by the last performance evaluation of the evaluated pile; A second correction unit, configured to correct the initial working error of the evaluated pile based on the corrected mutual information matrix to obtain a corrected initial working error; A determination unit is used to determine a target working error of the evaluated pile based on the corrected initial working error, wherein the target working error of the evaluated pile is used to represent an evaluation result of the performance of the evaluated pile this time.

10. An electronic device, characterized in that: It includes one or more processors and a memory, wherein the memory is used to store one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors implement the charging pile performance evaluation method described in any one of claims 1 to 7.

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