Load crossing identification method based on time-sharing and phase-sharing power line loss and voltage difference correlation

Abstract

The invention provides a load-crossing identification method based on time-sharing and phase-sharing power line loss and voltage difference correlation, which comprises the following steps: firstly, acquiring a voltage curve, a power curve and electric quantity line loss, and judging whether load-crossing users exist in a transformer area according to electric quantity line loss data: if the load-crossing users exist, carrying out transformer area concentrator and user phase identification; obtaining a phase mapping relation between the user and the concentrator; further calculating the voltage drop from the transformer area concentrator to the user; calculating a station area time-division and phase-division power line loss rate through user power, calculating line loss through voltage drop, and obtaining a station area time-division and phase-division power management line loss rate curve through the station area time-division and phase-division power line loss rate and theoretical power loss; and finally, positioning load-crossing users by calculating the correlation coefficient of the time-sharing and phase-sharing power management line loss rate and the voltage drop.

Description

Technical Field

[0001] The present invention belongs to the technical field of electric energy metering and collection, and in particular relates to a bypass load identification method based on time-sharing and phase-sharing power line loss and voltage difference correlation. Background Art

[0002] The existing method for identifying bypass loads of low-voltage meters is mainly achieved by analyzing abnormal events of the electricity meter such as the opening of the meter cover, voltage anomalies and zero-fire current anomalies. That is, it can mainly identify users who achieve the purpose of bypassing loads by destroying the meter's wiring or the meter's sampling channel. However, this identification method is difficult to quickly and timely locate the bypass load users, and the practicality of the project is poor. Summary of the invention

[0003] In view of the defects and shortcomings of the prior art, the purpose of the present invention is to provide a bypass load identification method based on the correlation between time-sharing and phase-sharing power line loss and voltage difference, so as to solve the problems existing in the above-mentioned background technology.

[0004] The scheme mainly includes the following steps: using the acquisition system to obtain the voltage curve, power curve and power line loss, and judging whether there are users bypassing the load in the substation by the power line loss data; if there are users bypassing the load, the phase of the substation concentrator and the user is identified, so as to map the phase mapping relationship between the user and the concentrator; calculating the voltage drop from the substation concentrator to the user; calculating the substation time-phase power line loss rate by the user power, calculating the line loss by the voltage drop, and obtaining the substation time-phase power management line loss rate by deducting the line loss and the meter loss from the substation time-phase power line loss; finally, identifying the users bypassing the load by calculating the correlation coefficient between the power management line loss rate of the substation time-phase and the voltage drop between the substation master meter and the user, achieving comprehensive coverage of the scenario of bypassing the load by overlapping the line, and only needing the power curve data and the voltage curve data to locate the abnormal phase, and at the same time, the correlation coefficient is simple in principle and efficient in calculation, and can quickly and timely locate the users bypassing the load, which has strong engineering practicality.

[0005] The specific technical solutions are as follows: A method for identifying bypassed loads based on the correlation between time-sharing and phase-sharing power line loss and voltage difference: first, voltage curves, power curves and electric quantity line loss are collected and acquired, and the electric quantity line loss data is used to determine whether there are bypassed load users in the substation area: if there are bypassed load users, the phases of the substation concentrator and the user are identified to obtain the phase mapping relationship between the user and the concentrator; the voltage drop from the substation concentrator to the user is further calculated; the time-sharing and phase-sharing power line loss rate of the substation area is calculated based on the user power, the line loss is calculated based on the voltage drop, and the time-sharing and phase-sharing power management line loss rate curve of the substation area is obtained by subtracting the theoretical power loss from the time-sharing and phase-sharing power line loss rate; finally, the bypassed load users are located by calculating the correlation coefficient between the time-sharing and phase-sharing power management line loss rate and the voltage drop.

[0006] Furthermore, the voltage curve, power curve and power line loss are collected and acquired, and the power line loss data is used to determine whether there are load bypassing users in the substation area, specifically: Obtain the line loss rate data of the substation area for the last N days, N ≥ 30, locate, clean and filter the missing or abnormal data through the analysis rules such as collection failure, measurement abnormality, and file missing. If the number of days of remaining data after filtering is still greater than n, regenerate the line loss rate time series sequence from the filtered data in the original time sequence. The selection of n should be as equal to N as possible, or not less than 9 / 10 of N, to avoid excessive proportion of abnormal data in other aspects affecting the initial screening of bypass load users: LR = [lr1, lr2, …, lrk]; Where lrk represents the kth data in the line loss rate time series sequence regenerated after screening; Then calculate the standard deviation Std and mean Mean of the sequence LR. If either Std or Mean exceeds the set threshold, it is determined that there are load bypassing users in the substation area.

[0007] Furthermore, when identifying the phase of the concentrator and the user in the substation, the HPLC module phase information, user voltage phase sequence data and concentrator phase angle data of all meters are collected, and the meter HPLC module phase freezing technology, user phase sequence and concentrator phase and phase angle mapping relationship are used to identify the phase of the concentrator and the user, and obtain the user and concentrator phase mapping relationship.

[0008] Furthermore, the voltage drop from the area concentrator to the user is calculated by calculating the voltage time-sharing and phase-sharing voltage difference through the time-sharing and phase-sharing curves of the area master meter and the user voltage: V dropA,i,m = V A,i -V A,i,m V dropB,i,m = V B,i -V B,i,m VdropC,i,m = V C,i -V C,i,m Where V A,i Indicates the voltage of phase A at i, V A,i,m Indicates the voltage of phase A user M at i, V dropA,i,m Indicates the voltage drop of phase A user M at i, V B,i Indicates the voltage of the total meter of phase B at i, V B,i,m Indicates the voltage of phase B user M at i, V dropB,i,m Indicates the voltage drop of phase B user M at i, V C,i Indicates the voltage of the C phase total meter at i, V C,i,m Indicates the voltage of phase C user M at i, V dropC,i,m It represents the voltage drop of user M in phase C at time i.

[0009] Furthermore, when the user voltage drop calculation is completed, the time-sharing and phase-sharing power line loss rate of the substation is calculated through the time-sharing and phase-sharing power curve data: by calculating the theoretical power loss of the substation and deducting the theoretical power loss from the actual power, the management power loss is obtained; specifically, the line loss is calculated through the voltage difference curve, and the time-sharing and phase-sharing power management line loss rate curve of the substation is obtained by subtracting the theoretical power loss from the time-sharing and phase-sharing power line loss rate, and the time-sharing and phase-sharing power management line loss rate curve is used to determine whether there is a user who bypasses the load in the phase.

[0010] Furthermore, the calculation formula of the time-sharing and phase-sharing power line loss rate is as follows: P lossA,i =(P A,i -∑P A,i,m ) / P A,i P lossB,i =(P B,i -∑P B,i,m ) / P B,i P lossC,i =(P C,i -∑P C,i,m ) / P C,i Where P A,i Indicates the total meter power of phase A at time i, P A,i,m represents the power of all A-phase users M at time i, P lossA,i Indicates the power line loss rate of phase A at time i, P B,i Indicates the total meter power of phase B at time i, P B,i,m represents the power of all B-phase users M at time i, P lossB，i Indicates the power line loss rate of phase B at time i, P C,i Indicates the total meter power of phase C at time i, PC,,mi represents the power of all C-phase users M at time i, P lossC,i It represents the power line loss rate of phase C at time i; The line loss is calculated as follows: L lossA,i,m =P A,i,m * V dropA,i,m L lossB,i,m =P B,i,m * V dropB,i,m L lossC,i,m =P C,i,m * V dropC,i,m The calculation formula of the meter loss is as follows: B lossA = N 1A / 30 + 0.8 * N 3A / 30 B lossB = N 1B / 30 + 0.8 * N 3B / 30 B lossC = N 1C / 30 + 0.8 * N 3C / 30 The calculation formula of the time-sharing and phase-sharing power management line loss rate is as follows: P lmA,i =P lossA,i -L lossA,i,m - B lossA P lmB,i =P lossB,i -L lossB,i,m - B lossB P lmC,i =P lossC,i -L lossC,i,m - B lossC .

[0011] Furthermore, when the phase where the bypass load user is located is identified, the maximum value Max of the three-phase power management line loss rate is calculated respectively. lmA ,Max lmB ,Max lmC and Mean lmA ,Mean lmB ,Mean lmC When either the maximum value or the average value exceeds the set threshold, it is determined that there is a bypassed load user in this phase.

[0012] Furthermore, when calculating the correlation coefficient between the time-division phase power management line loss rate and the voltage drop, the covariance of the user's voltage drop and the time-division phase power management line loss rate, the variance of the time-division phase power management line loss rate and the variance of the user's voltage drop are calculated respectively, and finally the correlation coefficient is calculated: The covariance formula for calculating the user's voltage drop and the line loss rate of time-division phase power management is as follows: COV(P lmA,i, , V dropA,i,m ) = ∑ (P lmA,i -avg(P lmA,i ))* (V dropA,i,m -avg(V dropA,i,m ) COV(P lmB,i , V dropB,i,m ) = ∑ (P lmB,i -avg(P lmB,i ))* (V dropB,i,m -avg(V dropB,i,m ) COV(P lmC,i , V dropC,i,m ) = ∑ (P lmC,i -avg(P lmC,i ))* (V dropC,i,m -avg(V dropC,i,m ) The formula for calculating the variance of the line loss rate of time-phase power management is as follows: σ PlmA,i = (P lmA,i -avg(P lmA,i ))^(1 / 2) σ PlmB,i = (P lmB,i -avg(P lmB,i ))^(1 / 2) σ PlmC,i = (P lmC,i -avg(P lmC,i ))^(1 / 2) The formula for calculating the variance of user pressure drop is as follows: σ VdropA,i,m = (V dropA,i,m -avg(V dropA,i,m ))^(1 / 2) σ VdropB,i,m = (V dropB,i,m -avg(V dropB,i,m ))^(1 / 2) σ VdropC,i,m = (V dropC,i,m -avg(V dropC,i,m))^(1 / 2) The formula for calculating the correlation coefficient is as follows: P m,A =COV(P lmA,i , V dropA,i,m ) / (σ PlmA,i * σ VdropA,i,m ) P m,B =COV(P lmB,i , V dropB,i,m ) / (σ PlmB,i * σ VdropB,i,m ) P m,C =COV(P lmC,i , V dropC,i,m ) / (σ PlmC,i * σ VdropC,i,m ) Get the correlation coefficient results for all users: [P 1,A ,P 2,A ,……,P m,A ,P 1,B ,P 2,B ,……,P m,B ,P 1,C ,P 2,C ,……,P m,C ]After that, select the users with abnormal phases and sort them from large to small. The larger the coefficient, the higher the suspicion of bypassing the load.

[0013] An electronic device comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the steps of the bypass load identification method based on the correlation between time-sharing and phase-sharing power line loss and voltage difference as described above are implemented.

[0014] A non-transitory computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the bypass load identification method based on the correlation between time-sharing and phase-sharing power line losses and voltage differences as described above.

[0015] Compared with the prior art, the present invention and its preferred scheme identify users who bypass the load by calculating the correlation coefficient between the time- and phase-divided power management line loss rate of the substation and the voltage drop between the substation master meter and the user, thereby achieving comprehensive coverage of the scenario of bypassing the load by overlapping lines, and only requiring power curve data and voltage curve data to locate the abnormal phase. At the same time, the correlation coefficient has a simple principle and efficient calculation, and can quickly and timely locate users who bypass the load, and has strong engineering practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments: Figure 1 A flow chart of a method provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in combination with 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 are within the scope of protection of the present invention.

[0018] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0019] The present invention will be further described below in conjunction with specific embodiments, but the present invention is not limited thereto.

[0020] The embodiment of the present invention provides a bypass load identification method based on the correlation between time-sharing and phase-sharing power line loss and voltage difference, such as Figure 1 As shown, the following steps are included: Step 1: Use the data collection system to obtain the voltage curve, power curve and power line loss, and use the power line loss data to determine whether there are load bypassing users in the substation area; First, you need to obtain the line loss rate data of the substation area for the last N days (N ≥ 30), formulate sample cleaning rules, and obtain cleaned data. If the number of days of remaining data after screening is still greater than n, regenerate the line loss rate time series sequence from the filtered data in the original time order: LR = [lr1, lr2, …, lrk]; Where lrk represents the kth data in the line loss rate time series sequence regenerated after screening; Then calculate the standard deviation Std and mean Mean of the sequence LR. If either Std or Mean exceeds the threshold, it is considered that there are load bypassing users in the substation area.

[0021] Step 2: If there is a user bypassing the load, the phase of the area concentrator and the user is identified, so as to map the phase mapping relationship between the user and the concentrator. If there is no user bypassing the load, the detection is directly terminated. Compared with other algorithms for identifying users bypassing the load, the innovation of this embodiment is to use the HPLC module phase freezing technology of the meter, the user phase sequence and the concentrator phase and phase angle mapping relationship to identify the phase of the concentrator and the user, and further narrow the scope of the users bypassing the load by distinguishing the user phases; When identifying the phase between the concentrator and the user in the substation, the HPLC module phase information, user voltage phase sequence data and concentrator phase angle data of all electric meters are collected, and the user and concentrator phase mapping relationship is obtained according to the following table: Load curve phase (meter curve data) HPLC module differences (provided by the module) Is the phase sequence reversed (meter operation status word 7) Concentrator phase angle Conversion results (load curve relative to the concentrator) 1 1 0 0,120,240 A 2 1 0 0,120,240 B 3 1 0 0,120,240 C 1 2 0 0,120,240 B 2 2 0 0,120,240 C 3 2 0 0,120,240 A 1 3 0 0,120,240 C 2 3 0 0,120,240 A 3 3 0 0,120,240 B 1 1 1 0,120,240 A 2 1 1 0,120,240 C 3 1 1 0,120,240 B 1 2 1 0,120,240 B 2 2 1 0,120,240 A 3 2 1 0,120,240 C 1 3 1 0,120,240 C 2 3 1 0,120,240 B 3 3 1 0,120,240 A 1 1 0 0,240,120 A 2 1 0 0,240,120 C 3 1 0 0,240,120 B 1 2 0 0,240,120 C 2 2 0 0,240,120 B 3 2 0 0,240,120 A 1 3 0 0,240,120 B 2 3 0 0,240,120 A 3 3 0 0,240,120 C 1 1 1 0,240,120 A 2 1 1 0,240,120 B 3 1 1 0,240,120 C 1 2 1 0,240,120 C 2 2 1 0,240,120 A 3 2 1 0,240,120 B 1 3 1 0,240,120 B 2 3 1 0,240,120 C 3 3 1 0,240,120 A Step 3: After the phase mapping relationship between the user and the concentrator is obtained, the voltage drop between the area concentrator and the user is calculated. Compared with other algorithms for identifying bypassed load users, the backplane embodiment calculates the voltage time-sharing and phase-sharing voltage difference through the 96-point time-sharing and phase-sharing curves of the area total meter and the user voltage; Get the voltage curve data for a recent period of time and calculate the voltage drop of each user. V dropA,i,m = V A,i -V A,i,m V dropB,i,m = V B,i -V B,i,m V dropC,i,m = V C,i -V C,i,m Where V A,i Indicates the voltage of phase A at i, V A,i,m Indicates the voltage of phase A user M at i, V dropA,i,m Indicates the voltage drop of phase A user M at i, V B,i Indicates the voltage of the total meter of phase B at i, V B,i,m Indicates the voltage of phase B user M at i, V dropB,i,m Indicates the voltage drop of phase B user M at i, V C,i Indicates the voltage of the C phase total meter at i, V C,i,m Indicates the voltage of phase C user M at i, V dropC,i,m It represents the voltage drop of user M in phase C at time i.

[0022] Step 4. After the user voltage drop calculation is completed, unlike the traditional line loss rate algorithm that uses daily frozen electricity, this patent calculates the time-sharing and phase-splitting power line loss rate of the substation through the time-sharing and phase-splitting power curve data. In addition, compared with other algorithms for identifying users who bypass loads, this embodiment calculates the theoretical power loss of the substation, and deducts the theoretical power loss from the actual power to obtain the management power loss. Specifically, the line loss is calculated through the voltage differential curve, and the time-sharing and phase-splitting power management line loss rate curve of the substation is obtained by subtracting the theoretical power loss from the time-sharing and phase-splitting power line loss rate. The time-sharing and phase-splitting power management line loss rate curve is used to determine whether there are users who bypass loads in the phase. When calculating the time-sharing and phase-splitting power management line loss rate, it is necessary to calculate the time-sharing and phase-splitting power line losses of the substation separately: P lossA,i =(PA,i -∑P A,i,m ) / P A,i P lossB,i =(P B,i -∑P B,i,m ) / P B,i P lossC,i =(P C,i -∑P C,i,m ) / P C,i Where P A,i Indicates the total meter power of phase A at time i, P A,i,m represents the power of all A-phase users M at time i, P lossA,i Indicates the power line loss rate of phase A at time i, P B,i Indicates the total meter power of phase B at time i, P B,i,m represents the power of all B-phase users M at time i, P lossB，i Indicates the power line loss rate of phase B at time i, P C,i Indicates the total meter power of phase C at time i, P C,,mi represents the power of all C-phase users M at time i, P lossC,i Represents the power line loss rate of phase C at time i.

[0023] The formula for calculating user line loss is as follows: L lossA,i,m =P A,i,m * V dropA,i,m L lossB,i,m =P B,i,m * V dropB,i,m L lossC,i,m =P C,i,m * V dropC,i,m The formula for calculating meter loss is as follows: B lossA = N 1A / 30 + 0.8 * N 3A / 30 B lossB = N 1B / 30 + 0.8 * N 3B / 30 B lossC = N 1C / 30 + 0.8 * N 3C / 30 The formula for calculating the line loss rate of time-sharing and phase-sharing power management is as follows: P lmA,i =P lossA,i-L lossA,i,m - B lossA P lmB,i =P lossB,i -L lossB,i,m - B lossB P lmC,i =P lossC,i -L lossC,i,m - B lossC When the phase where the bypass load user is located is identified, the maximum value of the three-phase power management line loss rate Max is calculated separately lmA ,Max lmB ,Max lmC and Mean lmA ,Mean lmB ,Mean lmC , when either the maximum value or the average value exceeds the threshold, it is considered that there is a bypassed load user in this phase.

[0024] Step 5: Calculate the correlation coefficient by using the time-sharing and phase-sharing power management line loss rate and voltage drop to obtain the bypass load users. In particular, this embodiment uses the time-sharing and phase-sharing power management line loss and voltage curve to calculate the covariance, variance, correlation coefficient and other mathematical methods to accurately identify the bypass load users; When calculating the correlation coefficient between the line loss rate and voltage drop of the time-sharing and phase-sharing power management, it is necessary to calculate the covariance of the user's voltage drop and the line loss rate of the time-sharing and phase-sharing power management respectively: COV(P lmA,i, , V dropA,i,m ) = ∑ (P lmA,i -avg(P lmA,i ))* (V dropA,i,m -avg(V dropA,i,m ) COV(P lmB,i , V dropB,i,m ) = ∑ (P lmB,i -avg(P lmB,i ))* (V dropB,i,m -avg(V dropB,i,m ) COV(P lmC,i , V dropC,i,m ) = ∑ (P lmC,i -avg(P lmC,i ))* (V dropC,i,m -avg(V dropC,i,m ) The formula for calculating the variance of the line loss rate of time-sharing and phase-sharing power management is as follows: σ PlmA,i = (PlmA,i -avg(P lmA,i ))^(1 / 2) σ PlmB,i = (P lmB,i -avg(P lmB,i ))^(1 / 2) σ PlmC,i = (P lmC,i -avg(P lmC,i ))^(1 / 2) The formula for calculating the variance of user pressure drop is as follows: σ VdropA,i,m = (V dropA,i,m -avg(V dropA,i,m ))^(1 / 2) σ VdropB,i,m = (V dropB,i,m -avg(V dropB,i,m ))^(1 / 2) σ VdropC,i,m = (V dropC,i,m -avg(V dropC,i,m ))^(1 / 2) The formula for calculating the correlation coefficient is as follows: P m,A =COV(P lmA,i , V dropA,i,m ) / (σ PlmA,i * σ VdropA,i,m ) P m,B =COV(P lmB,i , V dropB,i,m ) / (σ PlmB,i * σ VdropB,i,m ) P m,C =COV(P lmC,i , V dropC,i,m ) / (σ PlmC,i * σ VdropC,i,m ) When the correlation coefficient results of all users are obtained [P 1,A ,P 2,A ,……,P m,A ,P 1,B ,P 2,B ,……,P m,B ,P 1,C ,P 2,C ,……,P m,C ], select the users with abnormal phase and sort them from large to small. The larger the coefficient, the higher the suspicion of bypassing the load, which is the electricity theft user.

[0025] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0026] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0027] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0028] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0029] The above is only a preferred embodiment of the present invention, and does not limit the present invention in other forms. Any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention still belongs to the protection scope of the technical solution of the present invention.

[0030] This patent is not limited to the above-mentioned optimal implementation mode. Anyone can derive other forms of bypass load identification methods based on the correlation between time-sharing and phase-sharing power line loss and voltage difference under the inspiration of this patent. All equal changes and modifications made according to the scope of the patent application of the present invention should be covered by this patent.

Claims

1. A bypass load identification method based on time-sharing and phase-sharing power line loss and voltage difference correlation, characterized in that: First, the voltage curve, power curve and power line loss are collected and acquired, and the power line loss data is used to determine whether there are users who bypass the load in the substation. If there are users who bypass the load, the phase of the substation concentrator and the user is identified to obtain the phase mapping relationship between the user and the concentrator. The voltage drop from the substation concentrator to the user is further calculated. The time-sharing and phase-divided power line loss rate of the substation is calculated based on the user power, and the line loss is calculated based on the voltage drop. The time-sharing and phase-divided power line loss rate of the substation is obtained by subtracting the theoretical line loss and the meter loss from the time-sharing and phase-divided power line loss of the substation. Finally, the users who bypass the load are located by calculating the correlation coefficient between the time-sharing and phase-divided power line loss rate and the voltage drop.

2. The bypass load identification method based on time-sharing and phase-sharing power line loss and voltage difference correlation according to claim 1 is characterized in that: The acquisition of voltage curve, power curve and electric quantity line loss, and judging whether there is a user bypassing the load in the substation area through the electric quantity line loss data are specifically as follows: Get the line loss rate data of the substation area for the last N days, N ≥ 30, locate, clean and filter the missing or abnormal data. If the number of days of remaining data after filtering is still greater than n, regenerate the line loss rate time series sequence from the filtered data in the original time order: LR = [lr1, lr2, …, lrk]; Where lrk represents the kth data in the line loss rate time series sequence regenerated after screening; Then calculate the standard deviation Std and mean Mean of the sequence LR. If either Std or Mean exceeds the set threshold, it is determined that there are load bypassing users in the substation area.

3. The bypass load identification method based on time-sharing and phase-sharing power line loss and voltage difference correlation according to claim 1 is characterized in that: When identifying the phase of the concentrator and the user in the substation, the HPLC module phase information, user voltage phase sequence data and concentrator phase angle data of all meters are collected, and the HPLC module phase freezing technology of the meter, the user phase sequence and the concentrator phase and phase angle mapping relationship are used to identify the phase of the concentrator and the user, and obtain the user and concentrator phase mapping relationship.

4. The bypass load identification method based on time-sharing and phase-sharing power line loss and voltage difference correlation according to claim 1 is characterized in that: The calculation of the voltage drop from the area concentrator to the user is specifically to calculate the voltage time-sharing and phase-sharing voltage difference through the area master meter and the time-sharing and phase-sharing curve of the user voltage: V dropA,i,m = V A,i - V A,i,m V dropB,i,m = V B,i - V B,i,m V dropC,i,m = V C,i - V C,i,m Where V A,i Indicates the voltage of phase A at i, V A,i,m Indicates the voltage of phase A user M at i, V dropA,i,m Indicates the voltage drop of phase A user M at i, V B,i Indicates the voltage of the total meter of phase B at i, V B,i,m Indicates the voltage of phase B user M at i, V dropB,i,m Indicates the voltage drop of phase B user M at i, V C,i Indicates the voltage of the C phase total meter at i, V C,i,m Indicates the voltage of phase C user M at i, V dropC,i,m It represents the voltage drop of user M in phase C at time i.

5. The bypass load identification method based on time-sharing and phase-sharing power line loss and voltage difference correlation according to claim 1 is characterized in that: When the user voltage drop calculation is completed, the time-sharing and phase-sharing power line loss rate of the substation is calculated through the time-sharing and phase-sharing power curve data: by calculating the theoretical power loss of the substation and deducting the theoretical power loss from the actual power, the management power loss is obtained; specifically, the line loss is calculated through the voltage difference curve, and the time-sharing and phase-sharing power management line loss rate curve of the substation is obtained by subtracting the theoretical power loss from the time-sharing and phase-sharing power line loss rate, and the time-sharing and phase-sharing power management line loss rate curve is used to determine whether there is a user who bypasses the load in the phase.

6. The bypass load identification method based on time-sharing and phase-sharing power line loss and voltage difference correlation according to claim 4 is characterized in that: The calculation formula of the time-sharing and phase-sharing power line loss rate is as follows: P lossA,i =(P A,i -∑P A,i,m ) / P A,i P lossB,i =(P B,i -∑P B,i,m ) / P B,i P lossC,i =(P C,i -∑P C,i,m ) / P C,i Where P A,i Indicates the total meter power of phase A at time i, P A,i,m represents the power of all A-phase users M at time i, P lossA,i Indicates the power line loss rate of phase A at time i, P B,i Indicates the total meter power of phase B at time i, P B,i,m represents the power of all B-phase users M at time i, P lossB，i Indicates the power line loss rate of phase B at time i, P C,i Indicates the total meter power of phase C at time i, P C,,mi represents the power of all C-phase users M at time i, P lossC,i It represents the power line loss rate of phase C at time i; The calculation formula of the line loss is as follows: L lossA,i,m = P A,i,m * V dropA,i,m L lossB,i,m = P B,i,m * V dropB,i,m L lossC,i,m = P C,i,m * V dropC,i,m The calculation formula of the meter loss is as follows: B lossA = N 1A / 30 + 0.8 * N 3A / 30 B lossB = N 1B / 30 + 0.8 * N 3B / 30 B lossC = N 1C / 30 + 0.8 * N 3C / 30 The calculation formula of the time-sharing and phase-sharing power management line loss rate is as follows: P lmA,i = P lossA,i -L lossA,i,m - B lossA P lmB,i = P lossB,i -L lossB,i,m - B lossB P lmC,i = P lossC,i -L lossC,i,m - B lossC 。 7. The bypass load identification method based on time-sharing and phase-sharing power line loss and voltage difference correlation according to claim 1 is characterized in that: When the phase where the bypass load user is located is identified, the maximum value of the three-phase power management line loss rate Max is calculated separately lmA ,Max lmB ,Max lmC and Mean lmA ,Mean lmB ,Mean lmC When either the maximum value or the average value exceeds the set threshold, it is determined that there is a bypassed load user in this phase.

8. The bypass load identification method based on time-sharing and phase-sharing power line loss and voltage difference correlation according to claim 6 is characterized in that: When calculating the correlation coefficient between the time-division power management line loss rate and the voltage drop, the covariance of the user's voltage drop and the time-division power management line loss rate, the variance of the time-division power management line loss rate and the variance of the user's voltage drop are calculated respectively, and finally the correlation coefficient is calculated: The covariance formula for calculating the user's voltage drop and the line loss rate of time-division phase power management is as follows: COV(P lmA,i, , V dropA,i,m )= ∑(P lmA,i - avg(P lmA,i ))* (V dropA,i,m - avg(V dropA,i,m )) COV(P lmB,i , V dropB,i,m )= ∑(P lmB,i - avg(P lmB,i ))* (V dropB,i,m - avg(V dropB,i,m )) COV(P lmC,i , V dropC,i,m )= ∑(P lmC,i - avg(P lmC,i ))* (V dropC,i,m - avg(V dropC,i,m )) The formula for calculating the variance of the line loss rate of time-phase power management is as follows: σ PlmA,i = (P lmA,i - avg(P lmA,i ))^(1 / 2) σ PlmB,i = (P lmB,i - avg(P lmB,i ))^(1 / 2) σ PlmC,i = (P lmC,i - avg(P lmC,i ))^(1 / 2) The formula for calculating the variance of user pressure drop is as follows: σ VdropA,i,m = (V dropA,i,m - avg(V dropA,i,m ))^(1 / 2) σ VdropB,i,m = (V dropB,i,m - avg(V dropB,i,m ))^(1 / 2) σ VdropC,i,m = (V dropC,i,m - avg(V dropC,i,m ))^(1 / 2) The formula for calculating the correlation coefficient is as follows: P m,A = COV(P lmA,i , V dropA,i,m ) / (s PlmA,i * s VdropA,i,m ) P m,B = COV(P lmB,i , V dropB,i,m ) / (s PlmB,i * s VdropB,i,m ) P m,C = COV(P lmC,i , V dropC,i,m ) / (s PlmC,i * s VdropC,i,m ) Get the correlation coefficient results for all users: [P 1,A ,P 2,A ,……,P m,A ,P 1,B ,P 2,B ,……,P m,B ,P 1,C ,P 2,C ,……,P m,C ]After that, select the users with abnormal phases and sort them from large to small. The larger the coefficient, the higher the suspicion of bypassing the load.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the steps of the bypass load identification method based on time-sharing and phase-sharing power line loss and voltage difference correlation as described in any one of claims 1 to 8 are implemented.

10. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the bypass load identification method based on time-sharing and phase-sharing power line loss and voltage difference correlation as described in any one of claims 1 to 8 are implemented.

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