Method and system for judging wrong wiring of three-phase four-wire wiring metering device

Abstract

The invention discloses a method and system for judging false wiring of a three-phase four-wire wiring metering device, and relates to the technical field of false wiring judgment, and the method comprises the steps: obtaining the operation parameters of an electric energy meter at each time node in a preset time interval, the operation parameters of the electric energy meter comprise an A-phase current value, a B-phase current value and a C-phase current value outputted by the electric energy meter; respectively obtaining an A-phase current absolute value, a B-phase current absolute value and a C-phase current absolute value of each time node through the A-phase current value, the B-phase current value and the C-phase current value, and obtaining an absolute value sum of each time node; performing abnormal value judgment on the sum of the absolute values in the preset time interval, and performing wiring judgment in a preset mode when an abnormal value exists in the preset time interval; and the data content of the electricity user suspected to be wrong wiring is output, and whether wrong wiring exists in the field can be judged remotely through the data content after manual auditing in the next step, so that field work, live detection and waste of a large amount of manpower resources are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of wrong wiring judgment, and more specifically, to a method and system for judging wrong wiring of a three-phase four-wire wiring metering device. Background Art

[0002] Electricity metering is an important indicator of the service quality of power companies. Its accuracy and reliability have a decisive impact on the operating results of power supply companies and the property safety of users. However, due to the lack of responsibility of meter replacement personnel, insufficient skills, and unauthorized changes to meter circuits by electricity users, it is difficult to avoid incorrect wiring in some electricity metering devices during operation. Incorrect wiring may lead to economic losses for power suppliers or property losses for users. The longer the incorrect wiring of electricity metering lasts, the more electricity charges for incorrect electricity will be incurred, which will bring greater difficulties to the refund of electricity charges. In this context, how to promptly and accurately investigate and rectify the metering errors of electricity meters, ensure the correct wiring of metering devices, and ensure that the metering is "fair, just, and open" is of great practical significance.

[0003] As for the current situation, there are two main methods for my country's power supply companies to judge whether the wiring of three-phase four-wire metering devices is incorrect: (1) sort out the wiring on site to check whether there is any wrong connection; (2) observe the power consumption on site through on-site calibration instruments. However, once away from the power consumption site, technicians cannot use remote data to judge whether the three-phase four-wire metering device connected via a transformer is incorrectly wired. This results in the use of on-site instruments for judgment, which is labor-intensive and requires high human resources. At the same time, the on-site environment is complex and there are certain safety risks. Summary of the invention

[0004] The object of the present invention is to provide a method and system for determining incorrect wiring of a three-phase four-wire connected metering device, so as to solve the problems existing in the above-mentioned background technology.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions:

[0006] In a first aspect, the present application provides a method for determining incorrect wiring of a three-phase four-wire wiring metering device, comprising the following specific steps:

[0007] S1. Obtaining the operating parameters of the electric energy meter at each time node within a preset time interval, where the operating parameters of the electric energy meter include the A-phase current value, the B-phase current value, and the C-phase current value output by the electric energy meter;

[0008] S2. Obtain the absolute value of the A phase current, the absolute value of the B phase current and the absolute value of the C phase current at each time node through the A phase current value, the B phase current value and the C phase current value, and obtain the absolute value and of each time node;

[0009] S3. Perform abnormal value judgment on each absolute value and within the preset time interval. When an abnormal value exists within the preset time interval, perform wiring judgment through a preset method. The preset method includes:

[0010] S311, obtaining the absolute value sum determined as abnormal value and the number of the absolute value sum, and obtaining the A-phase current value, the B-phase current value and the C-phase current value corresponding to each absolute value sum;

[0011] S312, for each absolute value sum determined as an abnormal value, obtain the three-phase power factor values ​​corresponding to the A-phase current value, the B-phase current value and the C-phase current value in the absolute value sum respectively;

[0012] S313, using each three-phase power factor value, respectively calculate the absolute values ​​judged as abnormal values ​​and the phase angles corresponding to the A-phase current value, the B-phase current value and the C-phase current value;

[0013] S314, for each absolute value sum determined as an abnormal value, respectively calculate the phase angle difference between any two phases of the A-phase current value, the B-phase current value and the C-phase current value in the absolute value sum, and if the phase angle difference between any two phases is not greater than a first preset value, determine the abnormal value as abnormal data;

[0014] S315. Calculate a first proportion of the number of abnormal data in the number of abnormal values. If the first proportion is not less than a second preset value, determine that the metering device for obtaining the operating parameters of the electric energy meter is suspected of having incorrect wiring.

[0015] The beneficial effects of the present invention are as follows: in this scheme, a method for screening and distinguishing wrong wiring of a three-phase four-wire electric energy metering device connected by a transformer is provided; first, based on the power consumption information collection system built by the power supply company, which covers all users and is used to collect various parameters in the operation of the electric energy meter, the operating parameters of each electric energy meter are obtained; secondly, the phase angle is calculated and compared and judged according to the various current data in the operating parameters of the electric energy meter, and finally the proportion of the number of abnormal data in the number of abnormal values ​​is obtained; finally, according to the obtained first proportion, it is judged that the electric energy meter has a wiring abnormality, that is, when the first proportion is exceeded, the electric energy meter is judged to be suspected of wrong wiring; and when the electric energy meter is judged to be suspected of wrong wiring, the corresponding electricity user account number, account name, voltage level, electricity consumption category, electricity price classification, metering point number, meter number, multiple, etc. can be obtained according to the electric energy meter, and after selecting the power supply unit to which the user belongs, the account name, the account number, the specific data of the abnormality, the specific time and the phase-by-phase display data are displayed, so that the staff can perform manual verification and data review.

[0016] In this solution, an electricity consumption information collection system is built by the power supply company to cover all users and collect various parameters during the operation of the electricity meter. The collected parameters are used to determine whether wrong wiring has occurred, so as to achieve a comprehensive analysis of users in the supply area, effectively reducing the number of on-site work by staff, saving labor costs, reducing the number of on-site work, and ensuring on-site safety. In addition, it can regularly control and troubleshoot wrong wiring, and promptly correct wrong wiring in the supply area to avoid large erroneous electricity charges and achieve fair, just and open metering.

[0017] Based on the above technical solution, the present invention can also be improved as follows.

[0018] Furthermore, the above-mentioned presetting method also includes:

[0019] S321, obtaining the absolute value sum determined as abnormal value and the number of the absolute value sum, and obtaining the absolute value of the A phase current, the absolute value of the B phase current and the absolute value of the C phase current corresponding to each absolute value sum;

[0020] S322, for each absolute value and determined as an abnormal value, respectively determine the magnitude between any two phases of the absolute value of the A phase current, the absolute value of the B phase current, and the absolute value of the C phase current in the absolute value and, if the magnitudes between any two phases are the same, determine the abnormal value as abnormal data;

[0021] S323, calculating a second proportion of the number of abnormal data in the number of abnormal values, and if the second proportion is not less than a third preset value, determining the metering device for obtaining the operating parameters of the electric energy meter as suspected of incorrect wiring.

[0022] The beneficial effect of adopting the above further scheme is that the current absolute value comparison method is parallel to the phase angle comparison method, that is, when there is an abnormal value within the preset time interval, the phase angle judgment and the current absolute value judgment are carried out simultaneously; first, each absolute value and the corresponding A-phase current absolute value, B-phase current absolute value and C-phase current absolute value are obtained; secondly, the size between any two phases of the absolute value of the A-phase current, the absolute value of the B-phase current and the absolute value of the C-phase current in the absolute value is judged; finally, whether it is a suspected wrong wiring is determined according to the proportion of the number of abnormal data in the number of abnormal values, that is, when the second proportion is not less than the third preset value, the metering device is judged to be a suspected wrong wiring.

[0023] In actual application, the load can be limited by setting the current value to eliminate the influence of the user's load properties (such as capacitor equipment, etc.) on the judgment method; or the load can be excluded by limiting the voltage, current, power and user files containing relevant important information about the load properties, so as to screen out users who can make incorrect wiring judgments.

[0024] Furthermore, the phase angles corresponding to the A-phase current value, the B-phase current value and the C-phase current value in the above absolute values ​​are specifically:

[0025]

[0026] In the formula, Indicates the phase angles corresponding to the A-phase current value, B-phase current value, and C-phase current value in the absolute value and, It represents the phasor angle between the three-phase current and voltage of A, B and C in the operating parameters of the electric energy meter.

[0027] Furthermore, the absolute value sum of the above time nodes is specifically:

[0028] |I n |=|I na |+|I nb |+|I nc |;

[0029] In the formula, |I n | represents the absolute value and the value of the nth time node, |I na |、|I nb |、|I nc |represent the absolute value of the current of phase A, phase B, and phase C at the nth time node, respectively. na ,I nb ,I nc They respectively represent the A-phase current value, B-phase current value and C-phase current value at the n-th time node.

[0030] Furthermore, the second preset value is 50%.

[0031] Furthermore, the third preset value is 50%.

[0032] In a third aspect, the present application provides a system for determining incorrect wiring of a three-phase four-wire connected metering device, which is applied to a method for determining incorrect wiring of a three-phase four-wire connected metering device in any one of the first aspects, comprising:

[0033] The first module is used to obtain the operating parameters of the electric energy meter at each time node within a preset time interval, and the operating parameters of the electric energy meter include the A-phase current value, the B-phase current value and the C-phase current value output by the electric energy meter;

[0034] The second module is used to obtain the absolute value of the A phase current, the absolute value of the B phase current and the absolute value of the C phase current at each time node through the A phase current value, the B phase current value and the C phase current value, and obtain the absolute value and of each time node;

[0035] The third module is used to judge the abnormal value of each absolute value and within the preset time interval. When there is an abnormal value within the preset time interval, the wiring judgment is performed through the preset method, and the preset method is executed as follows;

[0036] The first submodule is used to obtain the absolute value sum determined as abnormal value and the number of the absolute value sum, and obtain the A-phase current value, B-phase current value and C-phase current value corresponding to each absolute value sum;

[0037] The second submodule is used to obtain, for each absolute value sum determined as an abnormal value, three-phase power factor values ​​corresponding to the A-phase current value, the B-phase current value and the C-phase current value in the absolute value sum respectively;

[0038] The third submodule is used to calculate the absolute values ​​of the abnormal values ​​and the phase angles corresponding to the A-phase current value, the B-phase current value and the C-phase current value respectively by using the three-phase power factor values.

[0039] A fourth submodule is used to calculate the phase angle difference between any two phases of the A-phase current value, the B-phase current value and the C-phase current value in the absolute value sum for each absolute value sum judged as an abnormal value, and if the phase angle difference between any two phases is not greater than a first preset value, the abnormal value is determined as abnormal data;

[0040] The fifth submodule is used to calculate a first proportion of the number of abnormal data in the number of abnormal values. If the first proportion is not less than a second preset value, the metering device for obtaining the operating parameters of the electric energy meter is judged to be suspected of incorrect wiring.

[0041] Furthermore, the above-mentioned presetting method is also performed by:

[0042] The sixth submodule is used to obtain the absolute value sum determined as abnormal values ​​and the number of the absolute value sums, and obtain the absolute value of the A-phase current, the absolute value of the B-phase current and the absolute value of the C-phase current corresponding to each absolute value sum;

[0043] The seventh submodule is used to determine the magnitude between any two phases of the absolute value of the A-phase current, the absolute value of the B-phase current and the absolute value of the C-phase current in the absolute value and for each absolute value determined as an abnormal value, and if the magnitudes between any two phases are the same, determine the abnormal value as abnormal data;

[0044] The eighth submodule is used to calculate a second proportion of the number of abnormal data in the number of abnormal values. If the second proportion is not less than a third preset value, the metering device for obtaining the operating parameters of the electric energy meter is judged to be suspected of incorrect wiring.

[0045] In a third aspect, the present application provides an electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements any one of the methods in the first aspect when executing the computer program.

[0046] In a fourth aspect, the present application provides a non-transitory computer-readable storage medium, which stores computer instructions, and the computer instructions enable a computer to execute any one of the methods in the first aspect.

[0047] Compared with the prior art, the present invention has at least the following beneficial effects:

[0048] In the present application, a method for screening and distinguishing incorrect wiring of a three-phase four-wire electric energy metering device connected via a transformer is provided; first, based on the power consumption information collection system built by the power supply company, which covers all users and is used to collect various parameters in the operation of the electric energy meter, the operating parameters of each electric energy meter are obtained; secondly, the phase angle is calculated and compared based on the various current data in the operating parameters of the electric energy meter, and finally the proportion of the number of abnormal data in the number of abnormal values ​​is obtained; finally, based on the first proportion obtained, it is judged that the electric energy meter has a wiring abnormality, that is, when the first proportion is exceeded, the electric energy meter is judged to be suspected of incorrect wiring; and when the electric energy meter is judged to be suspected of incorrect wiring, the corresponding electricity user number, household name, voltage level, electricity consumption category, electricity price classification, metering point number, meter number, multiple, etc. can be obtained according to the electric energy meter, and after selecting the power supply unit to which the user belongs, the household name, the household number, the specific data of the abnormality, the specific time, and the phase-by-phase display data, the staff can perform manual verification and data review.

[0049] In the present application, the current absolute value comparison method is parallel to the phase angle comparison method, that is, when there is an abnormal value within the preset time interval, the phase angle judgment and the current absolute value judgment are performed simultaneously; first, each absolute value and the corresponding A-phase current absolute value, B-phase current absolute value and C-phase current absolute value are obtained; secondly, the size between any two phases of the absolute value of the A-phase current, the absolute value of the B-phase current and the absolute value of the C-phase current in the absolute value is judged; finally, whether it is a suspected wrong wiring is determined according to the proportion of the number of abnormal data in the number of abnormal values, that is, when the second proportion is not less than the third preset value, the metering device is judged to be a suspected wrong wiring.

[0050] In this application, an electricity consumption information collection system is built by the power supply company to cover all users and collect various parameters in the operation of the electricity meter. The collected parameters are used to judge whether wrong wiring has occurred, so as to realize full analysis of users in the supply area, effectively reduce the number of on-site work times of staff, save labor costs, reduce the number of on-site work times, and ensure on-site safety; and it can regularly control and check wrong wiring, and promptly correct the wrong wiring in the supply area, avoid large erroneous electricity charges, and realize fair, just and open metering. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0052] Figure 1 A method flow chart of a determination method in an embodiment of the present invention;

[0053] Figure 2 A flowchart of one of the preset methods in an embodiment of the present invention;

[0054] Figure 3 This is a flow chart of another presetting method in an embodiment of the present invention;

[0055] Figure 4 is a flow chart of a determination method in an embodiment of the present invention;

[0056] Figure 5 Schematic diagram of the connection of the judgment system in the embodiment of the present invention. DETAILED DESCRIPTION

[0057] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions 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 part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0058] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0059] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0060] In the description of the embodiments of the present invention, "plurality" means at least 2.

[0061] Embodiment 1:

[0062] This embodiment provides a method for determining incorrect wiring of a three-phase four-wire connection metering device. Figure 1 As shown, the following specific steps are included:

[0063] S1. Obtaining the operating parameters of the electric energy meter at each time node within a preset time interval, the operating parameters of the electric energy meter including the A-phase current value, the B-phase current value and the C-phase current value output by the electric energy meter.

[0064] Among them, the operation parameters of the electric energy meter may also include the user's account number, name, voltage level, electricity consumption category, electricity price classification, metering point number, meter number, multiple, etc.; the time interval may be 1 day, and the time node may be a node every 15 minutes. In this way, there are 96 time nodes in a day, so 96 sets of corresponding electric energy meter operation parameters may be collected.

[0065] S2. Obtain the absolute value of the A phase current, the absolute value of the B phase current and the absolute value of the C phase current at each time node through the A phase current value, the B phase current value and the C phase current value, and obtain the absolute value and of each time node.

[0066] Optionally, the absolute value sum of the above time nodes is:

[0067] |I n |=|I na |+|I nb |+|I nc |.

[0068] In the formula, |I n | represents the absolute value and the value of the nth time node, |I na |、|I nb |、|I nc |represent the absolute value of the current of phase A, phase B, and phase C at the nth time node, respectively. na ,I nb ,I nc They respectively represent the A-phase current value, B-phase current value and C-phase current value at the n-th time node.

[0069] S3, judge the abnormal value of each absolute value and within the preset time interval; wherein, if |I n|≥N value, the absolute value and is judged to be an abnormal value, and when an abnormal value occurs, it is necessary to judge the wiring error; the N value is set manually according to the situation and environment. If the N value is smaller, the probability of being interfered by the reactive power compensation on the user side is greater, and the power consumption data will show negative current and negative power factor, resulting in reduced accuracy of judgment and increased workload of manual review; in this link, N of the 96 points of data can be screened out. 1 Group data value (N 1 is the outlier, N 1 ≤96); when there is an abnormal value within the preset time interval, the wiring judgment is performed through the preset method, such as Figure 2 As shown, the preset mode may include:

[0070] S311. Obtain the absolute value sum determined as abnormal values ​​and the number of the absolute value sums, and obtain the A-phase current value, B-phase current value and C-phase current value corresponding to each absolute value sum.

[0071] S312. For each absolute value sum determined as an abnormal value, obtain the three-phase power factor values ​​corresponding to the A-phase current value, the B-phase current value and the C-phase current value in the absolute value sum.

[0072] S313. Using the three-phase power factor values, respectively calculate the absolute values ​​judged as abnormal values ​​and the phase angles corresponding to the A-phase current value, the B-phase current value and the C-phase current value.

[0073] Optionally, the phase angles corresponding to the A-phase current value, the B-phase current value and the C-phase current value in the above-mentioned absolute value sums are specifically:

[0074]

[0075] In the formula, Indicates the phase angles corresponding to the A-phase current value, B-phase current value, and C-phase current value in the absolute value and, It represents the phasor angle between the three-phase current and voltage of A, B and C in the operating parameters of the electric energy meter.

[0076] Among them, the phase angles of the above three phases are further:

[0077]

[0078] Among them, α, β, and γ in the formula represent the A, B, and C three-phase power factor values ​​of the electricity user data respectively.

[0079] S314. For each absolute value sum judged as an abnormal value, calculate the phase angle difference between any two phases of the A-phase current value, the B-phase current value and the C-phase current value in the absolute value sum respectively; if the phase angle difference between any two phases is not greater than a first preset value, determine the abnormal value as abnormal data.

[0080] The above judgment process can be expressed as follows: or or When any one of the above conditions is met, the data set is considered to be abnormal data suspected of incorrect wiring; M is a manually set reference value. The higher the value, the higher the accuracy of the program judgment, but the probability of missing users with incorrect wiring will increase. Conversely, the lower the value, the lower the accuracy of the program judgment, but the probability of missing users with incorrect wiring will decrease. Based on the vector diagram formed by the three-phase four-wire wiring system, generally known as the "hexagonal diagram", if the phase angle difference obtained by subtracting any two voltage and current phase angles exceeds a certain limit, it can be effectively determined that the current and voltage are different phases, so it can be determined whether there is a possibility of incorrect wiring.

[0081] S315, calculating a first proportion of the number of abnormal data to the number of abnormal values, and if the first proportion is not less than a second preset value, determining the metering device for obtaining the operation parameters of the electric energy meter as suspected wrong wiring. The second preset value may be 50%.

[0082] Further, if Figure 3 As shown, the above-mentioned preset method may also include:

[0083] S321. Obtain the absolute value sum determined as abnormal values ​​and the number of the absolute value sums, and obtain the absolute value of the A-phase current, the absolute value of the B-phase current and the absolute value of the C-phase current corresponding to each absolute value sum.

[0084] S322. For each absolute value and determined as an abnormal value, respectively determine the size between any two phases of the absolute value of the A-phase current, the absolute value of the B-phase current and the absolute value of the C-phase current in the absolute value and, if the sizes between any two phases are the same, determine the abnormal value as abnormal data.

[0085] S323, calculating a second proportion of the number of abnormal data in the number of abnormal values, and if the second proportion is not less than a third preset value, determining the metering device for obtaining the operation parameters of the electric energy meter as suspected wrong wiring. The third preset value may be 50%.

[0086] Among them, the comparison method of the absolute value of the current is parallel to the comparison method of the phase angle. The A-phase current value Ia, B-phase current value Ib, and C-phase current value Ic of each household user obtained are used; the absolute values of the three-phase current values are taken. The absolute value of the A-phase current value of the circuit is expressed as |Ia|, the absolute value of the B-phase current value of the circuit is expressed as |Ib|, and the absolute value of the C-phase current value of the circuit is expressed as |Ic|; if in the 96-point data, any one of the three equations |Ia| - |Ib| = 0, |Ib| - |Ic| = 0, or |Ia| - |Ic| = 0 holds, and more than 50% of the groups of |Ia|, |Ib|, and |Ic| at the same moment satisfy the above equation, it is determined as abnormal data of incorrect wiring, and the basis for determination is output - the established one or more groups of equations, and the expression and the number of incorrect groups are output.

[0087] Specifically, the flow of the above judgment method can be referred to Figure 4 , in Figure 4 , the external database represents various parameters collected by the power consumption information acquisition system. When making a judgment, first, an outlier judgment is made on each absolute value sum. When an outlier appears, it enters Figure 4 's "series connection troubleshooting" and "phase angle troubleshooting", and these two respectively represent the absolute value comparison and phase angle comparison methods in this embodiment. Finally, the corresponding judgment result is output according to the judgment; Figure 4 's "obvious suspected abnormality" can include the final "suspected incorrect wiring" and various information of relevant electric energy meters in this embodiment; then output display and other operations are performed; based on the above judgment method, the data content of the user with suspected incorrect wiring can be output after judgment. Next, through manual review, it can be remotely determined whether there is incorrect wiring on-site through the data content, avoiding on-site work, live detection, and waste of a large amount of human resources.

[0088] Embodiment 2:

[0089] The embodiment of the present application provides a judgment system for incorrect wiring of a three-phase four-wire wiring metering device, which is applied to a judgment method for incorrect wiring of a three-phase four-wire wiring metering device according to any one of Embodiment 1, as Figure 5 shown, including:

[0090] The first module is used to obtain the operation parameters of the electric energy meter at each time node within a preset time interval, and the operation parameters of the electric energy meter include the A-phase current value, B-phase current value, and C-phase current value output by the electric energy meter.

[0091] The second module is used to obtain the absolute value of the A-phase current, the absolute value of the B-phase current, and the absolute value of the C-phase current at each time node respectively through the A-phase current value, B-phase current value, and C-phase current value, and obtain the sum of the absolute values at each time node.

[0092] The third module is used to judge the abnormal value of each absolute value and within the preset time interval. When there is an abnormal value within the preset time interval, the wiring judgment is performed through the preset method, and the preset method is executed as follows.

[0093] The first submodule is used to obtain the absolute value sum judged as abnormal value and the number of the absolute value sum, and obtain the A-phase current value, B-phase current value and C-phase current value corresponding to each absolute value sum.

[0094] The second submodule is used to obtain the three-phase power factor values ​​corresponding to the A-phase current value, the B-phase current value and the C-phase current value in the absolute value sum for each absolute value sum judged as an abnormal value.

[0095] The third submodule is used to use each three-phase power factor value to calculate each absolute value judged as an abnormal value and the phase angle corresponding to the A-phase current value, the B-phase current value and the C-phase current value.

[0096] The fourth submodule is used to calculate the phase angle difference between any two phases of the A-phase current value, the B-phase current value and the C-phase current value in the absolute value and for each absolute value judged as an abnormal value. If the phase angle difference between any two phases is not greater than the first preset value, the abnormal value is determined as abnormal data.

[0097] The fifth submodule is used to calculate a first proportion of the number of abnormal data in the number of abnormal values. If the first proportion is not less than a second preset value, the metering device for obtaining the operating parameters of the electric energy meter is judged to be suspected of incorrect wiring.

[0098] Optionally, the above preset method can also be executed as follows:

[0099] The sixth submodule is used to obtain the absolute value sum judged as abnormal value and the number of absolute value sums, and obtain the absolute value of phase A current, phase B current absolute value and phase C current absolute value corresponding to each absolute value sum.

[0100] The seventh submodule is used to determine the size between any two phases of the absolute value of phase A current, the absolute value of phase B current and the absolute value of phase C current in the absolute value and for each absolute value judged as an abnormal value. If the sizes between any two phases are the same, the abnormal value is determined as abnormal data.

[0101] The eighth submodule is used to calculate a second proportion of the number of abnormal data in the number of abnormal values. If the second proportion is not less than a third preset value, the metering device for obtaining the operating parameters of the electric energy meter is judged to be suspected of incorrect wiring.

[0102] Embodiment 3:

[0103] An embodiment of the present application provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements any one of the methods in Embodiment 1 when executing the computer program.

[0104] Embodiment 4:

[0105] An embodiment of the present application provides a non-transitory computer-readable storage medium, which stores computer instructions, and the computer instructions enable a computer to execute any method in Example 1.

[0106] The above specific implementation methods further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific implementation methods of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for determining incorrect wiring of a three-phase four-wire metering device, characterized in that: The specific steps include: S1. Acquire the operating parameters of the electric energy meter at each time node within a preset time interval, wherein the operating parameters of the electric energy meter include the A-phase current value, the B-phase current value and the C-phase current value output by the electric energy meter; S2. Obtain the absolute value of the A phase current, the absolute value of the B phase current and the absolute value of the C phase current at each time node through the A phase current value, the B phase current value and the C phase current value, and obtain the absolute value and of each time node; S3, performing abnormal value judgment on each absolute value and within the preset time interval, and when an abnormal value exists within the preset time interval, performing wiring judgment by a preset method, the preset method includes: S311, obtaining the absolute value sum determined as abnormal value and the number of the absolute value sum, and obtaining the A-phase current value, the B-phase current value and the C-phase current value corresponding to each absolute value sum; S312, for each absolute value sum determined as an abnormal value, obtain the three-phase power factor values ​​corresponding to the A-phase current value, the B-phase current value and the C-phase current value in the absolute value sum respectively; S313, using each three-phase power factor value, respectively calculate the absolute values ​​judged as abnormal values ​​and the phase angles corresponding to the A-phase current value, the B-phase current value and the C-phase current value; S314, for each absolute value sum determined as an abnormal value, respectively calculate the phase angle difference between any two phases of the A-phase current value, the B-phase current value and the C-phase current value in the absolute value sum, and if the phase angle difference between any two phases is not greater than a first preset value, determine the abnormal value as abnormal data; S315. Calculate a first proportion of the number of abnormal data in the number of abnormal values. If the first proportion is not less than a second preset value, determine that the metering device for obtaining the operating parameters of the electric energy meter is suspected of having incorrect wiring.

2. A method for determining incorrect wiring of a three-phase four-wire connection metering device according to claim 1, characterized in that: The preset method also includes: S321, obtaining the absolute value sum determined as abnormal value and the number of the absolute value sum, and obtaining the absolute value of the A phase current, the absolute value of the B phase current and the absolute value of the C phase current corresponding to each absolute value sum; S322, for each absolute value and determined as an abnormal value, respectively determine the magnitude between any two phases of the absolute value of the A phase current, the absolute value of the B phase current, and the absolute value of the C phase current in the absolute value and, if the magnitudes between any two phases are the same, determine the abnormal value as abnormal data; S323, calculating a second proportion of the number of abnormal data in the number of abnormal values, and if the second proportion is not less than a third preset value, determining the metering device for obtaining the operating parameters of the electric energy meter as suspected of incorrect wiring.

3. The method for determining incorrect wiring of a three-phase four-wire connection metering device according to claim 1, characterized in that: The phase angles corresponding to the A-phase current value, the B-phase current value and the C-phase current value in the absolute value sums are specifically: In the formula, Indicates the phase angles corresponding to the A-phase current value, the B-phase current value, and the C-phase current value in the absolute value and, It represents the phasor angle between the three-phase current and voltage of A, B and C in the operating parameters of the electric energy meter.

4. The method for determining incorrect wiring of a three-phase four-wire connection metering device according to claim 1, characterized in that: The absolute value sum of each time node is specifically: |I n |=|I na |+|I nb |+|I nc |; In the formula, |I n | represents the absolute value and the value of the nth time node, |I na |、|I nb |、|I nc | respectively represent the absolute value of the current of phase A, phase B, and phase C at the nth time node, I na ,I nb ,I nc They respectively represent the A-phase current value, B-phase current value and C-phase current value at the n-th time node.

5. The method for determining incorrect wiring of a three-phase four-wire connection metering device according to claim 1, characterized in that: The second preset value is 50%.

6. A method for determining incorrect wiring of a three-phase four-wire connection metering device according to claim 2, characterized in that: The third preset value is 50%.

7. A system for determining incorrect wiring of a three-phase four-wire connected metering device, applied to a method for determining incorrect wiring of a three-phase four-wire connected metering device according to any one of claims 1 to 6, characterized in that: include: The first module is used to obtain the operating parameters of the electric energy meter at each time node within a preset time interval, wherein the operating parameters of the electric energy meter include the A-phase current value, the B-phase current value and the C-phase current value output by the electric energy meter; The second module is used to obtain the absolute value of the A phase current, the absolute value of the B phase current and the absolute value of the C phase current at each time node through the A phase current value, the B phase current value and the C phase current value, and obtain the absolute value and of each time node; The third module is used to judge the abnormal value of each absolute value and within the preset time interval. When there is an abnormal value within the preset time interval, the connection judgment is performed by a preset method, and the preset method is executed as follows; The first submodule is used to obtain the absolute value sum determined as abnormal value and the number of the absolute value sum, and obtain the A-phase current value, B-phase current value and C-phase current value corresponding to each absolute value sum; The second submodule is used to obtain, for each absolute value sum determined as an abnormal value, three-phase power factor values ​​corresponding to the A-phase current value, the B-phase current value and the C-phase current value in the absolute value sum respectively; The third submodule is used to calculate the absolute values ​​of the abnormal values ​​and the phase angles corresponding to the A-phase current value, the B-phase current value and the C-phase current value respectively by using the three-phase power factor values. A fourth submodule is used to calculate the phase angle difference between any two phases of the A-phase current value, the B-phase current value and the C-phase current value in the absolute value sum for each absolute value sum judged as an abnormal value, and if the phase angle difference between any two phases is not greater than a first preset value, the abnormal value is determined as abnormal data; The fifth submodule is used to calculate a first proportion of the number of abnormal data in the number of abnormal values. If the first proportion is not less than a second preset value, the metering device for obtaining the operating parameters of the electric energy meter is judged to be suspected of incorrect wiring.

8. A system for determining incorrect wiring of a three-phase four-wire connection metering device according to claim 7, characterized in that: The preset mode is also performed by: The sixth submodule is used to obtain the absolute value sum determined as abnormal values ​​and the number of the absolute value sums, and obtain the absolute value of the A-phase current, the absolute value of the B-phase current and the absolute value of the C-phase current corresponding to each absolute value sum; The seventh submodule is used to determine the magnitude between any two phases of the absolute value of the A-phase current, the absolute value of the B-phase current and the absolute value of the C-phase current in the absolute value and for each absolute value determined as an abnormal value, and if the magnitudes between any two phases are the same, determine the abnormal value as abnormal data; The eighth submodule is used to calculate a second proportion of the number of abnormal data in the number of abnormal values. If the second proportion is not less than a third preset value, the metering device for obtaining the operating parameters of the electric energy meter is judged to be suspected of incorrect wiring.

9. An electronic device, characterized in that: The method comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the method according to any one of claims 1 to 6 is implemented.

10. A non-transitory computer-readable storage medium, characterized in that: The non-transitory computer-readable storage medium stores computer instructions, which enable a computer to execute the method of any one of claims 1-6.

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