Low-voltage single-phase multi-meter-position metering box

Abstract

The invention discloses a low-voltage single-phase multi-meter-position metering box, and relates to the technical field of metering boxes. The data acquisition module is used for acquiring electric variable data and magnetic variable data of each electric meter; the data processing module is used for respectively processing and analyzing the electric variable data and the magnetic variable data to obtain an electric variable analysis result and a magnetic variable analysis result; and analyzing the electrical variable analysis result based on an anomaly monitoring algorithm of an isolated forest to judge whether any electrical variable in the electrical variable analysis result is abnormal, and if yes, generating alarm information. According to the invention, through comprehensive acquisition of electric variable and magnetic variable data and deep analysis processing by using multiple algorithms, various electric quantity and magnetic quantity parameters can be accurately measured; meanwhile, the electrical variable anomaly detection module and the magnetic variable interference judgment mechanism can find abnormal conditions in time, and powerful guarantee is provided for stable operation of a power system.

Description

Technical Field

[0001] The present invention relates to the technical field of meter boxes, in particular to a low-voltage single-phase multi-meter meter box. Background Art

[0002] In modern power systems, low-voltage single-phase multi-meter meter boxes are the key to accurately measuring the electricity consumption of multiple users. Low-voltage single-phase multi-meter meter boxes are used to centrally install multiple single-phase meters to measure the electricity consumption of multiple users. They are widely used in various places.

[0003] However, traditional meter boxes have some shortcomings: for example, in terms of measurement accuracy, electromagnetic interference between meters and external magnetic field interference causes the measurement accuracy of electrical and magnetic variables to decrease, affecting measurement accuracy and causing economic losses; in terms of overload measurement and protection, it is difficult to accurately measure the degree of overload, and the lack of effective protection measures may cause safety accidents; therefore, it is necessary to propose a low-voltage single-phase multi-meter meter box to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a low-voltage single-phase multi-meter meter box to solve the problems of low measurement accuracy, inaccurate overload measurement, unstable data transmission and external magnetic field interference in the process of measuring electrical variables and magnetic variables of existing meter boxes, and to improve the performance and reliability of the meter box.

[0005] In order to achieve the above object, the present invention adopts the following technical solution: a low-voltage single-phase multi-meter meter box, a box body, wherein a plurality of independent chambers for installing electric meters are provided in the box body, and a compensation coil is provided in the electric meter, characterized in that a test monitoring system is provided in the box body; The test monitoring system includes a data acquisition module, a data processing module, a communication module and a monitoring center; The data acquisition module is used to collect the electrical variable data and magnetic variable data of each electric meter; the data processing module is used to process and analyze the electrical variable data and the magnetic variable data respectively to obtain electrical variable analysis results and magnetic variable analysis results; the electrical variable analysis results are analyzed based on the anomaly monitoring algorithm of the isolation forest to determine whether any electrical variable in the electrical variable analysis results is abnormal, and if so, an alarm message is generated; The communication module is used to transmit the electrical variable analysis results, the magnetic variable analysis results and the alarm information to the monitoring center according to the preset communication protocol; The monitoring center is used to receive and store electrical and magnetic variable data and corresponding analysis results and alarm information, analyze and process the data, display the stored information and realize remote control.

[0006] Preferably, the monitoring center includes: A data storage unit, used for receiving electrical variable and magnetic variable data and corresponding analysis results, storing them and establishing a historical database; The data management unit is used to analyze and process the information in the historical database, including statistics on power consumption in different time periods and analysis of power quality change trends; The interactive display module is used to access and display the information stored in the data storage unit.

[0007] Preferably, the data processing module further includes an electrical variable anomaly detection module and an alarm execution module; The electrical variable anomaly monitoring module is used to analyze the electrical variable analysis results based on the isolation forest anomaly monitoring algorithm: Obtain the results of the electrical variable analysis; construct a binary search tree based on the parameters in the electrical variable analysis results, with a series of measured values of each parameter as a data point on the tree, denoted as Xi, where i represents the parameter number in the electrical variable analysis results; calculate the path length of each data point in the corresponding tree, and then calculate the average path length by combining all trees; Then calculate the adjustment factor related to the sample size; The anomaly score of the data point is calculated based on the average path length and the adjustment factor. The anomaly score of the data point is used to determine whether the data point is abnormal. If it is abnormal, the electrical variable measurement value corresponding to the data point is determined to be an abnormal value and an alarm instruction is generated. Otherwise, it is determined to be a normal measurement value. The alarm execution module triggers the alarm mechanism when receiving the alarm instruction, and sends the alarm information to the monitoring center through the communication module, including the specific parameters of the abnormal electrical variable, the measurement time and the abnormality score.

[0008] Preferably, the electrical variable data is processed and analyzed, specifically as follows: Obtain electrical variable data for each meter, including basic electrical parameters, derived electrical parameters, and dynamically changing parameters. Basic electrical parameters include voltage, current, and power; derived electrical parameters include power factor and frequency; and dynamically changing parameters include voltage fluctuation, current harmonics, and the number of voltage sags and swells. Set the electrical parameter monitoring time zone and calculate the basic statistical values of any basic electrical parameter within the electrical parameter monitoring time zone, including the average value, maximum value, minimum value, and standard deviation value; Extract the characteristic data of the derived electrical parameters, use the standard deviation formula to calculate the stability of the power factor in the electrical parameter monitoring time zone and record it as the power factor stability value; Analyze the current harmonic data and calculate the content of each harmonic and record it as the harmonic content; The average value, maximum value, minimum value, standard deviation value, power factor stability, harmonic content, number of voltage sags and number of voltage swells are marked as electrical variable analysis results.

[0009] Preferably, the magnetic variable data is processed and analyzed, specifically as follows: Obtain the external magnetic field strength of each meter and the magnetic flux inside the meter; Set the magnetic monitoring time zone, calculate the change of magnetic flux in the magnetic monitoring time zone to obtain the magnetic flux change; then calculate the magnetic circuit loss compensation coefficient; Obtain the magnetic circuit temperature inside the meter and the magnetic circuit ambient temperature within the magnetic circuit setting range; set the magnetic circuit standard temperature, calculate the difference between the magnetic circuit temperature inside the meter and the magnetic circuit standard temperature, and obtain the magnetic circuit temperature difference; obtain the external ambient temperature outside the meter; Identify the power-on time of the electric meter closest to the current time, and mark the time between the power-on time and the current time as the working time of the electric meter; The external environment temperature, magnetic circuit environment temperature, meter working time and magnetic circuit temperature difference are weighted to obtain the magnetic shadow value; The external magnetic field intensity, magnetic circuit loss compensation coefficient and magnetic shadow value are weighted to obtain the magnetic interference value; If the magnetic interference value is greater than the preset magnetic field interference intensity threshold, it is determined that magnetic field interference exists, and at the same time, the compensation current is calculated according to the external magnetic field intensity, and the compensation circuit in the compensation coil is controlled to generate the compensation current; The external magnetic field intensity, compensation current, magnetic flux change, magnetic circuit loss compensation coefficient, and magnetic interference value are marked as magnetic variable analysis results.

[0010] Preferably, the rear end face of the box body is provided with a plurality of ventilation strips, dust exhaust fans are installed in the ventilation strips, side panels are vertically fixed on the left and right sides of the top surface of the box body, air passage strips are provided on the side panels, a back panel is fixed on the back side of the side panels, a top panel is fixed between the side panels and the top surface of the back panel, one of the side panels is hinged to the main box door, and the other side panel is hinged to the metering box door; a support assembly and a dust removal assembly are provided in the box body.

[0011] Preferably, the support assembly includes a side panel, the front end surface of the side panel is provided with a front panel in conjunction with the main box door and the metering box door, the front panel is installed and fixed on the top surface of the box body, a partition is installed and fixed between the front panel and the back panel, a porous hanging plate is installed and fixed on the back of the partition, and both sides of the porous hanging plate are installed and fixed on the side panels.

[0012] Preferably, the dust removal assembly includes a side panel, a dustproof plate is provided on the opposite surface of the side panel, the dustproof plate is fixed on the front end surface of the porous hanging plate, a dust-passing plate is provided under the dustproof plate, the dust-passing plate is fixed on the end of the box body, and a mounting plate is fixed on the porous hanging plate.

[0013] Preferably, through holes are provided on both the left and right sides of the rear bottom surface of the dust-passing plate, a motor is provided in the through holes, a transmission box is fixedly mounted on the top surface of the motor, the transmission box is fixedly mounted on the back of the porous hanging plate, a threaded rod is rotatably connected in the transmission box, the lower end of the threaded rod is connected to the motor, a threaded seat is sleeved on the outer side of the threaded rod, the threaded seat is slidably connected to the inside of the transmission box, a dust-sweeping plate is fixed on the threaded seat, a brush is provided on the dust-sweeping plate, and the brush abuts against the dust-proof plate.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention can accurately measure various electrical and magnetic parameters by comprehensively collecting electrical and magnetic variable data and applying multiple algorithms for in-depth analysis and processing. At the same time, the electrical variable anomaly detection module and the magnetic variable interference judgment mechanism can promptly detect abnormal situations, providing strong guarantees for the stable operation of the power system.

[0015] 2. The present invention uses the synergistic effect of the dust removal component and the support component. The design of the dust removal component effectively prevents dust from entering the interior of the box, avoiding short-circuit failures of power-connected equipment caused by dust accumulation. The support component facilitates equipment installation and layout, thereby improving the practicality and applicability of the meter box.

[0016] 3. The present invention designs a compensation coil and a compensation circuit inside the electric meter. When the external magnetic field and harmonic interference factors are too large, the compensation circuit in the compensation coil is controlled to generate a compensation current. The compensation circuit generates a corresponding magnetic field to offset the influence of the external magnetic field and harmonic interference on the electric meter measurement. It can effectively offset the external magnetic field and harmonic interference, ensure the measurement accuracy of the electric meter, and improve the reliability and stability of the meter box. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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: Figure 1 This is a three-dimensional schematic diagram of the low-voltage single-phase multi-meter meter box proposed by the present invention; Figure 2 This is a front view schematic diagram of the appearance of the present invention; Figure 3 This is a front view schematic diagram of the internal structure of the box body proposed by the present invention; Figure 4 A three-dimensional schematic diagram of the support assembly proposed by the present invention; Figure 5 A three-dimensional schematic diagram of the dust removal assembly proposed in the present invention; Figure 6 for Figure 5 A magnified schematic diagram of part A in the middle; Figure 7 This is a functional block diagram of the test monitoring system proposed in the present invention.

[0018] Serial numbers in the figure: 1. Box body; 2. Side panels; 3. Top panel; 4. Main box door; 5. Metering box door; 6. Front panel; 7. Partition; 8. Perforated hanging plate; 9. Dust-proof plate; 10. Dust-screening plate; 11. Mounting plate; 12. Dust exhaust fan; 13. Motor; 14. Transmission box; 15. Threaded rod; 16. Threaded seat; 17. Dust sweeping plate. DETAILED DESCRIPTION

[0019] 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 only part of the embodiments of the present invention, rather than all the embodiments.

[0020] See also Figure 1-Figure 7 The low-voltage single-phase multi-meter meter box of the present invention includes a box body 1, which is provided with a plurality of independent chambers for installing electric meters, a compensation coil is provided in the electric meter, and a test monitoring system is provided in the box body 1; The test monitoring system includes data acquisition module, data processing module and communication module; The data acquisition module is used to collect the electrical variable data and magnetic variable data of each electric meter; the data processing module is used to process and analyze the electrical variable data and magnetic variable data respectively to obtain electrical variable analysis results and magnetic variable analysis results; the electrical variable analysis results are analyzed by the anomaly monitoring algorithm based on the isolation forest to determine whether any electrical variable in the electrical variable analysis results is abnormal. If an anomaly is found, an alarm message is generated; The communication module is used to transmit the electric variable analysis results, magnetic variable analysis results and alarm information to the monitoring center according to the preset communication protocol; The monitoring center is used to receive and store electrical and magnetic variable data and corresponding analysis results and alarm information, analyze and process the data, display the stored information and realize remote control.

[0021] In this application, the monitoring center includes: A data storage unit, used for receiving electrical variable and magnetic variable data and corresponding analysis results, storing them and establishing a historical database; The data management unit is used to analyze and process the information in the historical database, including statistics on power consumption in different time periods and analysis of power quality change trends; The interactive display module is used to access and display the information stored in the data storage unit.

[0022] In this application, the data processing module also includes an electrical variable anomaly detection module and an alarm execution module; The electrical variable anomaly monitoring module is used to analyze the electrical variable analysis results based on the isolation forest anomaly monitoring algorithm: Obtain the results of the electrical variable analysis; construct a binary search tree based on the parameters in the electrical variable analysis results, and record a series of measurement values of each parameter as data points on the tree as Xi, where i represents the number of the parameter in the electrical variable analysis results; calculate the path length of each data point in the corresponding tree , and then combine all trees to calculate the average path length , the formula is as follows: , where T is the total number of parameters in the electrical variable analysis results, that is, the number of trees in the isolated forest, Represents the path length of the data point x in the binary search tree corresponding to the i-th electrical variable parameter; Then calculate the adjustment factor related to the sample size n , ,in, represents the harmonic number, which is approximately expressed as , represents Euler's constant, n represents the total number of samples of all parameter measurements in the electrical variable analysis results; Calculates anomaly score for a data point based on average path length and adjustment factor , the formula is ; Based on the anomaly score of the data point, it is judged whether the data point (i.e. the measured value of a certain electrical variable at a certain moment) is abnormal, specifically: Set an abnormal threshold. If the abnormal score of a data point is greater than the abnormal threshold, the electrical variable measurement value corresponding to the data point is determined to be an abnormal value and an alarm instruction is generated; otherwise, it is determined to be a normal measurement value. The alarm execution module triggers the alarm mechanism when receiving the alarm instruction, and sends the alarm information to the monitoring center through the communication module, including the specific parameters of the abnormal electrical variables, measurement time and abnormality score.

[0023] In this application, the electrical variable data is processed and analyzed, specifically: Obtain electrical variable data for each meter, including basic electrical parameters, derived electrical parameters, and dynamically changing parameters. Basic electrical parameters include voltage, current, and power; derived electrical parameters include power factor and frequency; and dynamically changing parameters include voltage fluctuation, current harmonics, and the number of voltage sags and swells. Set the electrical parameter monitoring time zone and calculate the basic statistical values of any basic electrical parameter within the electrical parameter monitoring time zone, including the average value, maximum value, minimum value, and standard deviation value (the maximum value and minimum value are used to reflect the fluctuation range of the parameter within the electrical parameter monitoring time zone, and the standard deviation value is used to reflect the degree of dispersion of the parameter); Extract the characteristic data of the derived electrical parameters, use the standard deviation formula to calculate the stability of the power factor in the electrical parameter monitoring time zone and record it as the power factor stability value; Analyze the current harmonic data and calculate the content of each harmonic, which is recorded as the harmonic content HR h , the formula is ,in, represents the effective value of the hth harmonic, Indicates the effective value of the fundamental current; The average value, maximum value, minimum value, standard deviation value, power factor stability, harmonic content, number of voltage sags and number of voltage swells are marked as electrical variable analysis results.

[0024] In this application, magnetic variable data is processed and analyzed, specifically: Get the external magnetic field strength of each meter , and obtain the magnetic flux in the meter; Set the magnetic monitoring time zone, calculate the change of magnetic flux in the magnetic monitoring time zone, and obtain the magnetic flux change as ; Then calculate the magnetic circuit loss compensation coefficient , the formula is ,in is the preset loss coefficient (set according to the magnetic circuit material and working conditions); Obtain the magnetic circuit temperature inside the meter and the magnetic circuit ambient temperature within the magnetic circuit setting range; set the magnetic circuit standard temperature, calculate the difference between the magnetic circuit temperature inside the meter and the magnetic circuit standard temperature, and obtain the magnetic circuit temperature difference; obtain the external ambient temperature outside the meter; Identify the power-on time of the electric meter closest to the current time, and mark the time between the power-on time and the current time as the working time of the electric meter; The external environment temperature, magnetic circuit environment temperature, meter working time and magnetic circuit temperature difference are weighted to obtain the magnetic shadow value; The external magnetic field intensity, magnetic circuit loss compensation coefficient and magnetic shadow value are weighted to obtain the magnetic interference value; If the magnetic interference value is greater than the preset magnetic field interference intensity threshold, it is determined that there is magnetic field interference, and the compensation current is calculated according to the external magnetic field intensity. , the formula is , controls the compensation circuit in the compensation coil to generate compensation current; generates corresponding magnetic field through the compensation circuit to offset the influence of external magnetic field and harmonic interference on the meter measurement; The external magnetic field intensity, compensation current, magnetic flux change, magnetic circuit loss compensation coefficient, and magnetic interference value are marked as magnetic variable analysis results.

[0025] The working principle of the test control system proposed by the present invention is as follows: Data acquisition phase: The data acquisition module continuously collects the electrical variable data (covering basic electrical parameters, derived electrical parameters, and dynamically changing parameters) and magnetic variable data (external magnetic field strength, magnetic flux inside the meter, etc.) of each meter. Data processing stage: Electrical variable processing: The data processing module first processes the electrical variable data; sets the electrical parameter monitoring time zone and calculates the average, maximum, minimum, and standard deviation values of the basic electrical parameters within the time zone to assess their fluctuation range and degree of dispersion; uses the standard deviation formula to calculate the stability of the power factor within the electrical parameter monitoring time zone, analyzes the current harmonic data, and calculates the content of each harmonic; then, the electrical variable anomaly detection module performs anomaly detection on the processed electrical variable analysis results based on the isolation forest algorithm; constructs a binary search tree, calculates the path length, average path length, adjustment factor, and anomaly score of the data point, and compares it with the preset anomaly threshold to determine whether the electrical variable measurement value is abnormal; if it is an abnormal value, the alarm execution module generates an alarm message and sends it to the monitoring center through the communication module; Magnetic variable processing: For magnetic variable data, the magnetic monitoring time zone is set, and the change in magnetic flux and the magnetic circuit loss compensation coefficient are calculated. The magnetic circuit temperature inside the meter, the magnetic circuit ambient temperature, and the external ambient temperature are obtained, and the magnetic circuit temperature difference is calculated. The magnetic shadow value is obtained by combining the meter's operating time. The external magnetic field strength, the magnetic circuit loss compensation coefficient, and the magnetic shadow value are weighted to obtain the magnetic interference value. If the magnetic interference value is greater than the preset magnetic field interference strength threshold, the compensation current is calculated and the compensation circuit in the compensation coil is controlled to generate the compensation current to offset the impact of the external magnetic field and harmonic interference on the meter measurement. Data transmission stage: The communication module transmits the electrical variable analysis results, magnetic variable analysis results and alarm information to the monitoring center according to the preset communication protocol to ensure accurate and stable data transmission.

[0026] In the present application, a plurality of ventilation strips are provided on the rear end face of the box body 1, and a dust exhaust fan 12 is installed in the ventilation strips. Side panels 2 are vertically fixed on the left and right sides of the top surface of the box body 1, and air passage strips are provided on the side panels 2. A back panel is fixed on the back of the side panels 2, and a top panel 3 is fixed between the side panels 2 and the top surface of the back panel. One of the side panels 2 is hinged with a main box door 4, and the other side panel 2 is hinged with a metering box door 5; a support assembly and a dust removal assembly are provided in the box body 1.

[0027] In the present application, the supporting assembly includes a side panel 2, and the front end surface of the side panel 2 is provided with a front panel 6 in conjunction with the main box door 4 and the metering box door 5. The front panel 6 is installed and fixed on the top surface of the box body 1, and a partition 7 is installed and fixed between the front panel 6 and the back panel. A porous hanging plate 8 is installed and fixed on the back of the partition 7, and the porous hanging plate 8 is installed and fixed on both sides of the side panel 2.

[0028] In this application, the dust removal assembly includes a side panel 2, a dustproof plate 9 is provided on the opposite surface of the side panel 2, and is installed and fixed on the front end surface of the porous hanging plate 8, a dust-passing plate 10 is provided below the dustproof plate 9, and the dust-passing plate 10 is installed and fixed at the end of the box body 1, and a mounting plate 11 is installed and fixed on the porous hanging plate 8.

[0029] In the present application, holes are provided on both sides of the rear left and right sides of the bottom surface of the dust-passing plate 10, and a motor 13 is provided in the through hole. A transmission box 14 is fixedly mounted on the top surface of the motor 13, and the transmission box 14 is fixed on the back of the porous hanging plate 8. A threaded rod 15 is rotatably connected in the transmission box 14, and the lower end of the threaded rod 15 is connected to the motor 13. A threaded seat 16 is provided on the outer side of the threaded rod 15, and the threaded seat 16 is slidably connected to the inside of the transmission box 14. A dust-sweeping plate 17 is fixed on the threaded seat 16, and a brush is provided on the dust-sweeping plate 17, which abuts the dust-proof plate 9.

[0030] The working principle of this application achieved through the support component and dust removal component is as follows: The porous hanging plate 8 and the mounting plate 11 of the supporting component facilitate the installation of power connection equipment and reasonably divide the equipment layout; the dust exhaust fan 12 of the dust removal component is started, so that the air in the box flows in from both sides and is discharged from the bottom to form a circulation; the motor 13 is started regularly, driving the threaded rod 15 to rotate, so that the threaded seat 16 drives the dust sweeping plate 17 to move up and down, cleaning the dust on the dustproof plate 9 to prevent dust accumulation from affecting the operation of the equipment.

[0031] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A low-voltage single-phase multi-meter meter box, comprising a box body (1), wherein a plurality of independent chambers for installing electric meters are provided in the box body, and a compensation coil is provided in the electric meter, characterized in that: A test monitoring system is provided in the box (1); The test monitoring system includes a data acquisition module, a data processing module, a communication module and a monitoring center; The data acquisition module is used to collect the electrical variable data and magnetic variable data of each electric meter; the data processing module is used to process and analyze the electrical variable data and the magnetic variable data respectively to obtain electrical variable analysis results and magnetic variable analysis results; the electrical variable analysis results are analyzed based on the anomaly monitoring algorithm of the isolation forest to determine whether any electrical variable in the electrical variable analysis results is abnormal, and if so, an alarm message is generated; The communication module is used to transmit the electrical variable analysis results, the magnetic variable analysis results and the alarm information to the monitoring center according to the preset communication protocol; The monitoring center is used to receive and store electrical and magnetic variable data and corresponding analysis results and alarm information, analyze and process the data, display the stored information and realize remote control.

2. The low-voltage single-phase multi-meter meter box according to claim 1, characterized in that: The monitoring center includes: A data storage unit, used for receiving electrical variable and magnetic variable data and corresponding analysis results, storing them and establishing a historical database; The data management unit is used to analyze and process the information in the historical database, including statistics on power consumption in different time periods and analysis of power quality change trends; The interactive display module is used to access and display the information stored in the data storage unit.

3. The low-voltage single-phase multi-meter meter box according to claim 1, characterized in that: The data processing module also includes an electrical variable anomaly detection module and an alarm execution module; The electrical variable anomaly monitoring module is used to analyze the electrical variable analysis results based on the isolation forest anomaly monitoring algorithm: Obtain electrical variable analysis results; A binary search tree is constructed based on the parameters in the electrical variable analysis results. A series of measured values of each parameter is recorded as a data point on the tree, Xi, where i represents the parameter number in the electrical variable analysis results. The path length of each data point in the corresponding tree is calculated, and then the average path length is calculated by combining all the trees. Then calculate the adjustment factor related to the sample size; The anomaly score of the data point is calculated based on the average path length and the adjustment factor. The anomaly score of the data point is used to determine whether the data point is abnormal. If it is abnormal, the electrical variable measurement value corresponding to the data point is determined to be an abnormal value and an alarm instruction is generated. Otherwise, it is determined to be a normal measurement value. The alarm execution module triggers the alarm mechanism when receiving the alarm instruction, and sends the alarm information to the monitoring center through the communication module, including the specific parameters of the abnormal electrical variable, the measurement time and the abnormality score.

4. The low-voltage single-phase multi-meter meter box according to claim 1, characterized in that: Process and analyze electrical variable data, specifically: Obtain electrical variable data for each meter, including basic electrical parameters, derived electrical parameters, and dynamically changing parameters. Basic electrical parameters include voltage, current, and power; derived electrical parameters include power factor and frequency; and dynamically changing parameters include voltage fluctuation, current harmonics, and the number of voltage sags and swells. Set the electrical parameter monitoring time zone and calculate the basic statistical values of any basic electrical parameter within the electrical parameter monitoring time zone, including the average value, maximum value, minimum value, and standard deviation value; Extract the characteristic data of the derived electrical parameters, use the standard deviation formula to calculate the stability of the power factor in the electrical parameter monitoring time zone and record it as the power factor stability value; Analyze the current harmonic data and calculate the content of each harmonic and record it as the harmonic content; The average value, maximum value, minimum value, standard deviation value, power factor stability, harmonic content, number of voltage sags and number of voltage swells are marked as electrical variable analysis results.

5. The low-voltage single-phase multi-meter meter box according to claim 1, characterized in that: Process and analyze magnetic variable data, specifically: Obtain the external magnetic field strength of each meter and the magnetic flux inside the meter; Set the magnetic monitoring time zone, calculate the change of magnetic flux in the magnetic monitoring time zone to obtain the magnetic flux change; then calculate the magnetic circuit loss compensation coefficient; Obtain the magnetic circuit temperature inside the meter and the magnetic circuit ambient temperature within the magnetic circuit setting range; set the magnetic circuit standard temperature, calculate the difference between the magnetic circuit temperature inside the meter and the magnetic circuit standard temperature, and obtain the magnetic circuit temperature difference; obtain the external ambient temperature outside the meter; Identify the power-on time of the electric meter closest to the current time, and mark the time between the power-on time and the current time as the working time of the electric meter; The external environment temperature, magnetic circuit environment temperature, meter working time and magnetic circuit temperature difference are weighted to obtain the magnetic shadow value; The external magnetic field intensity, magnetic circuit loss compensation coefficient and magnetic shadow value are weighted to obtain the magnetic interference value; If the magnetic interference value is greater than the preset magnetic field interference intensity threshold, it is determined that magnetic field interference exists, and at the same time, the compensation current is calculated according to the external magnetic field intensity, and the compensation circuit in the compensation coil is controlled to generate the compensation current; The external magnetic field intensity, compensation current, magnetic flux change, magnetic circuit loss compensation coefficient, and magnetic interference value are marked as magnetic variable analysis results.

6. The low-voltage single-phase multi-meter meter box according to claim 1, characterized in that: The rear end face of the box body (1) is provided with a plurality of ventilation strips, and a dust exhaust fan (12) is installed in the ventilation strips. Side panels (2) are vertically fixedly connected to the left and right sides of the top face of the box body (1). The side panels (2) are provided with air passage strips. The back face of the side panels (2) is fixedly connected to a back panel. A top panel (3) is fixedly connected between the side panels (2) and the top face of the back panel. One of the side panels (2) is hingedly connected to a main box door (4), and the other side panel (2) is hingedly connected to a metering box door (5). A support assembly and a dust removal assembly are provided in the box body (1).

7. The low-voltage single-phase multi-meter meter box according to claim 6, characterized in that: The support assembly comprises a side panel (2), the front end surface of the side panel (2) being matched with the main box door (4) and the metering box door (5) and provided with a front panel (6), the front panel (6) being mounted and fixed on the top surface of the box body (1), a partition (7) being mounted and fixed between the front panel (6) and the back panel, a porous hanging panel (8) being mounted and fixed on the back side of the partition (7), and both sides of the porous hanging panel (8) being mounted and fixed on the side panel (2).

8. The low-voltage single-phase multi-meter meter box according to claim 6, characterized in that: The dust removal assembly comprises a side plate (2), a dustproof plate (9) is provided on the opposite surface of the side plate (2), and the dustproof plate (9) is fixed on the front end surface of the porous hanging plate (8), a dust-passing plate (10) is provided below the dustproof plate (9), and the dust-passing plate (10) is fixed on the end of the box body (1), and a mounting plate (11) is fixed on the porous hanging plate (8).

9. The low-voltage single-phase multi-meter meter box according to claim 8, characterized in that: The bottom surface of the dust-passing plate (10) is provided with through holes on both the left and right sides. A motor (13) is provided in the through holes. A transmission box (14) is fixedly mounted on the top surface of the motor (13). The transmission box (14) is fixedly mounted on the back of the porous hanging plate (8). A threaded rod (15) is rotatably connected in the transmission box (14). The lower end of the threaded rod (15) is connected to the motor (13). A threaded seat (16) is sleeved on the outer side surface of the threaded rod (15). The threaded seat (16) is slidably connected to the inside of the transmission box (14). A dust-sweeping plate (17) is fixedly connected to the threaded seat (16). A brush is provided on the dust-sweeping plate (17). The brush abuts against the dust-proof plate (9).

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