Method and system for detecting abnormal electricity consumption of electric energy meter

Abstract

The invention relates to a method and a system for detecting abnormal electricity consumption of an electric energy meter, and relates to the technical field of electric power detection. According to the method for detecting abnormal power consumption of the electric energy meter, the data of the electric energy meter is collected and analyzed, so that the accuracy of wiring of the electric energy meter can be preliminarily judged through an instrument, the electric quantity needing to be compensated during a fault period is automatically calculated, the manual calculation processing time is shortened, and the field operation and maintenance working efficiency can be greatly improved; the electric quantity calculation method can be immediately corrected by analyzing acquired data of the electric energy meter, finding a wrong wiring condition, so that the device can acquire a real-time power consumption condition and automatically calculate the electric quantity needing to be compensated in a wrong wiring state and in abnormal operation, the operation and maintenance work difficulty of an electric power department is reduced, and the working efficiency is improved. And the efficiency of field operation and the timeliness of electric quantity compensation are improved.

Description

Technical Field

[0001] The present application relates to the field of power detection technology, and in particular to a method and system for detecting abnormal power consumption of an electric energy meter. Background Art

[0002] During the use of the electricity meter, there may be measurement failures such as incorrect wiring and errors. Therefore, it is necessary to use an electricity meter field calibrator to conduct on-site inspection of the electricity meter to check the error problems of the electricity meter and determine whether the electricity meter wiring is accurate. At the same time, if there is a measurement failure problem with the electricity meter, it is necessary to perform a retroactive calculation of the electricity consumption.

[0003] At present, the work of compensating the electricity consumption during metering failure is mainly calculated manually, which is inefficient and has a high error rate. For example, when the electricity meter has incorrect wiring and the compensatory electricity consumption needs to be calculated, a correction coefficient is required. The calculation of the actual power factor and the trigonometric function transformation in the correction coefficient algorithm are cumbersome, resulting in a large workload for metering personnel and a high error rate. As a result, there are errors in the calculated compensatory electricity consumption, which users do not accept very much and the efficiency of on-site operation and maintenance work is low. Summary of the Invention

[0004] In order to solve or partially solve the problems existing in the relevant technology, the present application provides a method for detecting abnormal power consumption of an electricity meter, which can collect data from the electricity meter for analysis and calculate the amount of electricity that needs to be replenished, thereby reducing the difficulty of operation and maintenance work of the power department, improving the efficiency of on-site operations and the timeliness of electricity replenishment.

[0005] In a first aspect, the present application provides a method for detecting abnormal power consumption of an electric energy meter, comprising: S100: Calculate the correct active power P of the nuclear power meter in the correct wiring state and the incorrect active power P' of the nuclear power meter in the incorrect wiring state based on the collected voltage, current, and power factor; S200: Calculate the correction coefficient K of the abnormal power consumption period of the checked electric energy meter based on the correct active power P and the incorrect active power P', K=P / P'; S300: Based on the correction coefficient K and the erroneous power W', the power required to be compensated is calculated as ∆W = W'*(K-1), where W' = L*(W2-W1), where W1 is the power value when the fault occurs, W2 is the power value when the fault ends, and L is the metering ratio.

[0006] Optionally, in some embodiments of the first aspect: The step S100 specifically includes: S101: Determine an incorrect wiring mode of the electric energy meter based on the power load attributes and the collected power factor data; S102: Determine the specific wiring mode of the electric energy meter based on the voltage phase sequence, current phase sequence, and power factor angle of each phase in the incorrect wiring state, and obtain a vector diagram of the electric energy meter wiring and an incorrect wiring diagram; S103: Obtaining an active power formula under the incorrect wiring mode according to the vector diagram of the electric energy meter connection and the incorrect wiring mode; S104: Calculate the actual phase angle of each phase of the user's electricity consumption based on the active power formula and the collected load power factor of the user's electricity consumption; S105: Calculate the correct active power P of the nuclear power meter in the correct wiring state and the incorrect active power P' of the nuclear power meter in the incorrect wiring state based on the phase angle and the collected voltage and current.

[0007] Optionally, in some embodiments of the first aspect: S101: determining the incorrect wiring mode of the electric energy meter based on the power load attributes and the collected power factor data, specifically includes: Voltage phase sequence judgment: Obtaining a voltage phase difference △θu12 between the first phase and the second phase, and obtaining a voltage phase difference △θu23 between the second phase and the third phase; If 110°≤△θu12≤130° and 110°≤△θu23≤130°, it is judged to be a positive phase sequence; If -130°≤△θu12≤110° and -130°≤△θu23≤-110°, it is determined to be a reverse phase sequence; in other cases, the phase sequence cannot be determined.

[0008] Optionally, in some embodiments of the first aspect: S101: determining the incorrect wiring mode of the electric energy meter based on the power load attributes and the collected power factor data, specifically includes: Current phase sequence judgment: Obtaining a current phase difference △θI12 between the first phase and the second phase, and obtaining a current phase difference △θI23 between the second phase and the third phase; If △θI12 and △θI23 are both greater than 0, it is judged to be a positive phase sequence; If ΔθI12 is greater than 0 and Δθ23 is less than 0, it is determined to be a reverse phase sequence.

[0009] Optionally, in some embodiments of the first aspect: S102: Determine the specific wiring mode of the electric energy meter based on the voltage phase sequence, current phase sequence, and power factor angle of each phase in the incorrect wiring state, and obtain a vector diagram of the electric energy meter wiring and an incorrect wiring diagram; specifically includes: Calculate the absolute value of the power factor angle of each phase based on the collected power factor of each phase, and determine whether the power factor angle of each phase is greater than 0 or less than 0 based on the positive and negative signs of the collected reactive power of each phase; The power factor angle under the incorrect wiring state is calculated based on the absolute value of the power factor angle calculated above.

[0010] Optionally, in some embodiments of the first aspect: Based on the correction coefficient K and the erroneous power W', the power required to be supplemented is calculated as ∆W = W'*(K-1), specifically including: By real-time monitoring of voltage mutations, when the mutation rate is ≥30% of the rated value and the duration is ≤10ms, the fault start timestamp t1 and W1 are automatically recorded; When the voltage returns to a steady state and remains so for 5 minutes with a fluctuation of ≤±2%, the fault end timestamp t2 is automatically recorded, and W2 is also recorded.

[0011] A second aspect of the present application provides a system for detecting abnormal power consumption of an electric energy meter, the system being used to execute the method in the above embodiment, the system comprising: a signal sampling module, a signal processing module, a metering device abnormality detection and analysis module, and an electric energy replenishment calculation module; The electric quantity replenishment calculation module includes: an electric energy meter detection function analysis module, a meter reading function module, and an electric quantity replenishment analysis and calculation processing module.

[0012] Optionally, in some embodiments of the second aspect: The energy meter detection function analysis module is connected to the energy meter being tested on site to collect the power parameter data of the energy meter, including: voltage, current, power factor and other power parameter data information of the energy meter circuit, and automatically analyzes and calculates to generate a vector diagram. According to the vector diagram, it determines the incorrect wiring of the energy meter and generates an energy meter wiring diagram based on the wiring situation, so as to analyze and judge the wiring situation of the energy meter and other fault problems, and provide fault cause analysis for the accurate accounting of the energy meter's electricity consumption.

[0013] Optionally, in some embodiments of the second aspect: The meter reading function module collects load curve records such as voltage, current, power factor, etc. required for electricity replenishment, as well as power parameter records such as electricity data, instantaneous variable data, event data, timed freeze data, and time period table data, and realizes comprehensive analysis of historical data and on-site detection data to intelligently calculate the electricity that needs to be replenished during the metering failure.

[0014] Optionally, in some embodiments of the second aspect: The electricity replenishment analysis and calculation processing module conducts a comprehensive analysis of the read electricity meter data based on the power parameter data, vector diagram, wiring method judgment, and fault type judgment detected by the electricity meter, and provides a calculation formula for the electricity that needs to be replenished based on the fault type, and calculates the amount of electricity that needs to be replenished.

[0015] The technical solution provided by this application may have the following beneficial effects: The method for detecting abnormal power consumption of an electric energy meter in the present application collects and analyzes data from the electric energy meter, and can realize a preliminary judgment on the accuracy of the electric energy meter wiring through the instrument, automatically calculate the amount of electricity that needs to be compensated during the fault period, reduce the time for manual calculation and processing, and can greatly improve the efficiency of on-site operation and maintenance work; through real-time monitoring of voltage mutations, it can capture the instantaneous starting point of the fault with high precision, avoid millisecond-level abnormal events that cannot be discovered by traditional manual inspections, and at the same time, by setting monitoring conditions, it can effectively eliminate interference and false touches, ensure the reliability of the fault start time, ensure the accuracy of subsequent fault power interval calculations, and avoid distortion in the calculation of the amount of electricity compensated due to misjudgment of the start and end times of the fault.

[0016] The system for detecting abnormal electricity consumption of electricity meters in the present application can collect data from electricity meters for analysis, discover incorrect wiring conditions, and immediately correct the electricity calculation method. In the event of incorrect wiring or abnormal operation, the device can collect real-time electricity consumption and automatically calculate the amount of electricity that needs to be compensated, reducing the difficulty of operation and maintenance work of the power department, improving the efficiency of on-site operations and the timeliness of electricity compensation.

[0017] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and other objects, features and advantages of the present application will become more apparent through a more detailed description of exemplary embodiments of the present application in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present application.

[0019] Figure 1 This is a structural diagram of a method for detecting abnormal power consumption of a heavy energy meter according to an embodiment of the present application; Figure 2 This is a structural diagram of a system for detecting abnormal power consumption of a heavy energy meter according to an embodiment of the present application; Figure 3 This is a schematic diagram of a calculation structure for the power replenishment analysis according to an embodiment of the present application; Figure 4 is a schematic diagram of the vector diagram in Example 1 of this application; Figure 5 This is a schematic diagram of the vector diagram in Example 2 of this application. DETAILED DESCRIPTION

[0020] The following describes embodiments of the present application in more detail with reference to the accompanying drawings. Although the accompanying drawings illustrate embodiments of the present application, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0021] It should be understood that although the terms "first", "second", "third", etc. may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0022] In the description of this application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0023] Unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be interpreted broadly. For example, they may refer to fixed or detachable connections, or integration; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0024] At present, the work of compensating the electricity consumption during metering failure is mainly calculated manually, which is inefficient and has a high error rate. For example, when the electricity meter has incorrect wiring and the compensatory electricity consumption needs to be calculated, a correction coefficient is required. The calculation of the actual power factor and the trigonometric function transformation in the correction coefficient algorithm are cumbersome, resulting in a large workload for metering personnel and a high error rate. As a result, there are errors in the calculated compensatory electricity consumption, which users do not accept very much and the efficiency of on-site operation and maintenance work is low.

[0025] In response to the above problems, the embodiments of the present application provide a method and system for detecting abnormal power consumption of an electricity meter, which can collect data from the electricity meter for analysis and calculate the amount of electricity that needs to be replenished, thereby reducing the difficulty of operation and maintenance work in the power department, improving the efficiency of on-site operations and the timeliness of electricity replenishment.

[0026] The technical solutions of the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0027] Figure 1 This is a structural diagram of a method for detecting abnormal power consumption of a heavy energy meter according to an embodiment of the present application; Figure 2 This is a structural diagram of a system for detecting abnormal power consumption of a heavy energy meter according to an embodiment of the present application; Figure 3 This is a schematic diagram of a calculation structure for the power replenishment analysis according to an embodiment of the present application; Figure 4 is a schematic diagram of the vector diagram in Example 1 of this application; Figure 5 This is a schematic diagram of the vector diagram in Example 2 of this application.

[0028] See also Figure 1 A method for detecting abnormal power consumption of an electric energy meter, comprising: S100: Calculate the correct active power P of the nuclear power meter in the correct wiring state and the incorrect active power P' of the nuclear power meter in the incorrect wiring state based on the collected voltage, current, and power factor.

[0029] Specifically, it includes: S101: Determine the incorrect wiring mode of the electric energy meter based on the electric load attribute and the collected power factor data; wherein the electric load attribute is determined based on the data of the three-phase electric energy meter, and the electric load attribute includes inductive load and capacitive load.

[0030] Specifically include: Voltage phase sequence judgment: Obtaining a voltage phase difference △θu12 between the first phase and the second phase, and obtaining a voltage phase difference △θu23 between the second phase and the third phase; If 110°≤△θu12≤130° and 110°≤△θu23≤130°, it is judged to be a positive phase sequence; If -130°≤△θu12≤110° and -130°≤△θu23≤-110°, it is determined to be a reverse phase sequence; in other cases, the phase sequence cannot be determined.

[0031] Current phase sequence judgment: Obtaining a current phase difference △θI12 between the first phase and the second phase, and obtaining a current phase difference △θI23 between the second phase and the third phase; If △θI12 and △θI23 are both greater than 0, it is judged to be a positive phase sequence; If ΔθI12 is greater than 0 and Δθ23 is less than 0, it is determined to be a reverse phase sequence.

[0032] In this embodiment, judging the voltage phase sequence by the voltage phase difference can resist interference from grid frequency fluctuations and avoid misjudgment. At the same time, judging the current phase sequence by the current phase difference can identify open circuit / short circuit faults and accurately determine the phase sequence.

[0033] S102: Determine the specific wiring mode of the electric energy meter based on the voltage phase sequence, current phase sequence, and power factor angle of each phase in the incorrect wiring state, and obtain a vector diagram of the electric energy meter wiring and an incorrect wiring diagram; specifically, including: Calculate the absolute value of the power factor angle of each phase based on the collected power factor of each phase, and determine whether the power factor angle of each phase is greater than 0 or less than 0 based on the positive and negative signs of the collected reactive power of each phase; The power factor angle under the incorrect wiring state is calculated based on the absolute value of the power factor angle calculated above.

[0034] S103: Obtaining an active power formula under the incorrect wiring mode according to the vector diagram of the electric energy meter connection and the incorrect wiring mode; S104: Calculate the actual phase angle of each phase of the user's electricity consumption based on the active power formula and the collected load power factor of the user's electricity consumption; S105: Calculate the correct active power P of the nuclear power meter in the correct wiring state and the incorrect active power P' of the nuclear power meter in the incorrect wiring state based on the phase angle and the collected voltage and current.

[0035] In this embodiment, by collecting voltage, current, and power factor, incorrect wiring can be effectively discovered, the accuracy of the electricity meter wiring can be judged, and the power calculation method can be corrected. In the case of incorrect wiring or abnormal operation, the correct active power P and the incorrect active power P' can be calculated to calculate the power consumption and the amount of power that needs to be compensated.

[0036] S200: Calculate the correction coefficient K of the abnormal power consumption period of the checked electric energy meter according to the correct active power P and the erroneous active power P', where K=P / P'.

[0037] S300: Based on the correction coefficient K and the erroneous power W', the power required to be compensated is calculated as ∆W = W'*(K-1), where W' = L*(W2-W1), where W1 is the power value when the fault occurs, W2 is the power value when the fault ends, and L is the metering ratio.

[0038] Specifically: by real-time monitoring of voltage mutations, when the mutation rate is ≥30% of the rated value and the duration is ≤10ms, the fault start timestamp t1 is automatically recorded, and W1 is also recorded; When the voltage returns to a steady state and remains so for 5 minutes with a fluctuation of ≤±2%, the fault end timestamp t2 is automatically recorded, and W2 is also recorded.

[0039] In this embodiment, by real-time monitoring of voltage mutations, the starting point of an instantaneous fault can be captured with high precision, avoiding millisecond-level abnormal events that cannot be discovered by traditional manual inspections. At the same time, by setting monitoring conditions, interference and false touches can be effectively eliminated, ensuring the reliability of the fault start time, and ensuring the accuracy of subsequent fault power interval calculations, avoiding distortion in power calculations caused by misjudgment of the fault start and end times.

[0040] To better illustrate the present application method, the following is described through specific examples: Specific embodiment 1: In a three-phase three-wire metering device implementation, the collected power factor data indicates that the load attribute of the three-phase three-wire electric energy meter is inductive, indicating a wiring error. Based on the collected voltage and current phase angles and power factors, it is determined that the incorrect wiring method of the electric energy meter is that the third phase current line Ic is connected to the first metering element, and the first phase current line Ia is reversely connected to the second metering element. The vector diagram is shown in FIG. Figure 4 As shown; The active power formula of the abnormal incorrect wiring is: P'= Uab*Ic*cos(90°-φc) + Ucb*Ia*(90°-φa) Where φa and φc are the phase angles when the first phase voltage and current are correctly connected, and the phase angle when the third phase voltage and current are correctly connected, respectively. Assuming cos∅1 is the recorded power factor of the first metering element and cos∅2 is the recorded power factor of the second metering element, then cos∅1 and cos∅2 are the load power factor data collected under incorrect wiring, then: cosφ1= cos(90°-φc), cosφ2= cos(90°-φa), The above formula can be used to calculate the phase angles φa and φc when the wiring is correct by using the inverse trigonometric function method. Then, the active power formula under normal wiring conditions is: P=Uab*Ia*cos(30°+ ∅a)+Ucb*Ic*cos(30°-∅c) The correct active power value P can be calculated. Based on the calculated correct active power P and the erroneous active power P', the correction coefficient K = P / P' during the incorrect wiring or fault period of the nuclear power meter is calculated. The power value W1 and the power value W2 at the time of the fault are collected through the meter reading function, and the multiplier L is used to calculate the erroneous power W' = L * (W2-W1) during the fault period. Finally, based on the correction coefficient K calculated above, the power required to be compensated is calculated as ∆W = W' * (K-1). Specific embodiment 2: In a three-phase four-wire metering device implementation case, the collected power factor data determined that the load attribute of the three-phase four-wire electricity meter was an inductive load, indicating a wiring error. Based on the collected voltage and current phase angles and their power factors, it was determined that the incorrect wiring method of the electricity meter was that the third-phase current line Ic was connected to the first-phase current interface, and the first-phase current line Ia was connected to the third-phase current interface. The load wiring had a voltage phase sequence of Ua, Ub, and Uc, and a current phase sequence of Ic, Ib, and Ia. The vector diagram is shown in the figure below. Figure 5 As shown; The active power formula of the abnormal incorrect wiring is: P' = Pa' + Pb' + Pc' = Ua*Ic* cos(120°-φc) + Ub*Ib*cosφb + Uc*Ia* cos(120°+φa) Where φa, φb, and φc are the phase angles when the voltage and current of the first, second, and third phases are correctly connected. Assuming that cos∅1, cos∅2, and cos∅3 are the recorded power factors of the first, second, and third phases, and cos∅1, cos∅2, and cos∅3 are the load power factor data collected under incorrect wiring, we have: cos∅1=cos(120°-∅c), cos∅2=cos∅b, cos∅3=cos(120°+∅a), The above formula can be used to calculate the phase angles φa, φb, and φc when the wiring is correct by using the inverse trigonometric function method. Then, the active power formula under normal wiring conditions is as follows: P=Pa+Pb+Pc =Ua*Ia*cos∅a+Ub*Ib*cos∅b+Uc*Ic*cos∅c The correct active power value P can be calculated. Based on the calculated correct active power P and the erroneous active power P', the correction coefficient K = P / P' during the incorrect wiring or fault period of the nuclear power meter is calculated. The power value W1 and the power value W2 at the time of the fault are collected through the meter reading function, and the multiplier L is used to calculate the erroneous power W' = L * (W2-W1) during the fault period. Finally, based on the correction coefficient K calculated above, the power required to be compensated is calculated as ∆W = W' * (K-1).

[0042] See also Figure 2-3 The present application provides a system for detecting abnormal power consumption of an electric energy meter. The system is used to execute the method in the above embodiment. The system includes: a signal sampling module, a signal processing module, a metering device abnormality detection and analysis module, and an electric energy recovery calculation module. The signal sampling module includes a voltage sampling module and a current sampling module. The voltage sampling module includes a voltage sampling circuit and a voltage gear switch. The current sampling module includes a current transformer sampling, a clamp meter sampling, a current sampling circuit switch, and a current gear switch. The signal processing module includes a signal anti-aliasing filter, a programmable gain amplifier, and a digital processor. The signal anti-aliasing filter is used to filter out high-frequency components. The programmable gain amplifier controls the signal amplification gain according to the strength of the sampled signal and converts the sampled analog signal into a digital signal through the A / D conversion module. The digital processor calculates, analyzes, and processes the sampled digital signal for parameters such as voltage, current, power, frequency, phase, power factor, and harmonics, and then sends this data information to the metering device anomaly detection and analysis module for detection and analysis. The abnormality detection and analysis module of the metering device includes an ARM processor, a data storage device, a display and a 485 communication interface. The ARM processor receives data sent by the signal processing module to realize functions such as human data display, data storage, and data analysis. The 485 communication module is connected to the ARM processing module and can be used to realize the function of reading the electric energy data of the electric energy meter.

[0043] Specifically: The electric energy meter detection function analysis module is connected to the electric energy meter being tested on site, and collects the electric energy meter's power parameter data, including: the voltage, current, power factor and other power parameter data information of the electric energy meter circuit, and automatically analyzes and calculates to generate a vector diagram, and judges the incorrect wiring of the electric energy meter based on the vector diagram, and generates an electric energy meter wiring diagram based on the wiring situation, so as to analyze and judge the wiring situation of the electric energy meter and other fault problems, and provide fault cause analysis for the accurate accounting of the electric energy meter's electricity consumption.

[0044] Specifically: The meter reading function module collects load curve records such as voltage, current, power factor, etc. required for electricity replenishment, as well as power parameter records such as electricity data, instantaneous variable data, event data, timed freeze data, and time period table data, and realizes comprehensive analysis of historical data and on-site detection data to intelligently calculate the electricity that needs to be replenished during the metering failure.

[0045] Specifically: The electricity replenishment analysis and calculation processing module conducts a comprehensive analysis of the read electricity meter data based on the power parameter data, vector diagram, wiring method judgment, and fault type judgment detected by the electricity meter, and provides a calculation formula for the electricity that needs to be replenished based on the fault type, and calculates the electricity that needs to be replenished.

[0046] The technical solutions provided by the embodiments of the present application include the following beneficial effects: The method for detecting abnormal power consumption of an electric energy meter in the present application collects and analyzes data from the electric energy meter, and can realize a preliminary judgment on the accuracy of the electric energy meter wiring through the instrument, automatically calculate the amount of electricity that needs to be compensated during the fault period, reduce the time for manual calculation and processing, and can greatly improve the efficiency of on-site operation and maintenance work; through real-time monitoring of voltage mutations, it can capture the instantaneous starting point of the fault with high precision, avoid millisecond-level abnormal events that cannot be discovered by traditional manual inspections, and at the same time, by setting monitoring conditions, it can effectively eliminate interference and false touches, ensure the reliability of the fault start time, ensure the accuracy of subsequent fault power interval calculations, and avoid distortion in the calculation of the amount of electricity compensated due to misjudgment of the start and end times of the fault.

[0047] The system for detecting abnormal electricity consumption of electricity meters in the present application can collect data from electricity meters for analysis, discover incorrect wiring conditions, and immediately correct the electricity calculation method. In the event of incorrect wiring or abnormal operation, the device can collect real-time electricity consumption and automatically calculate the amount of electricity that needs to be compensated, reducing the difficulty of operation and maintenance work of the power department, improving the efficiency of on-site operations and the timeliness of electricity compensation.

[0048] Finally, it should be noted that, in this document, relationships such as first and second, etc., are used solely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms include, comprise, or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0049] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the units may be selected to achieve the purpose of the solution of this embodiment according to actual needs.

[0050] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0051] If this integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, or the part that contributes to the existing technology, or all or part of this technical solution can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes a number of instructions for causing a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method of each embodiment of this application.

[0052] The embodiments of the present application have been described above. The above description is illustrative and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is selected to best explain the principles of the embodiments, their practical applications, or improvements to the technology in the market, or to enable other persons skilled in the art to understand the embodiments disclosed herein.

Claims

1. A method for detecting abnormal power consumption of an electric energy meter, characterized in that: include: S100: Calculate the correct active power P of the nuclear power meter in the correct wiring state and the incorrect active power P' of the nuclear power meter in the incorrect wiring state based on the collected voltage, current, and power factor; S200: Calculate the correction coefficient K during the abnormal power consumption period of the checked electric energy meter according to the correct active power P and the incorrect active power P', where K=P / P'; S300: Calculate the amount of electricity to be supplemented ∆W = W'*(K-1) based on the correction coefficient K and the erroneous electricity W', where W' = L*(W2-W1), where W1 is the electricity value when the fault occurs, W2 is the electricity value when the fault ends, and L is the metering ratio.

2. The method for detecting abnormal power consumption of an electric energy meter according to claim 1, wherein: The S100 specifically includes: S101: Determine an incorrect wiring mode of the electric energy meter based on the power load attributes and the collected power factor data; S102: Determine the specific wiring mode of the electric energy meter based on the voltage phase sequence, current phase sequence, and power factor angle of each phase in the incorrect wiring state, and obtain a vector diagram of the electric energy meter wiring and an incorrect wiring diagram; S103: Obtaining an active power formula under the incorrect wiring mode according to the vector diagram of the electric energy meter wiring and the incorrect wiring mode; S104: Calculating the actual phase angle of each phase of the user's electricity consumption based on the active power formula and the collected load power factor of the user's electricity consumption; S105: Calculate the correct active power P of the nuclear power meter in the correct wiring state and the incorrect active power P' of the nuclear power meter in the incorrect wiring state according to the phase angle and the collected voltage and current.

3. The method for detecting abnormal power consumption of an electric energy meter according to claim 2, characterized in that: The step S101: determining the incorrect wiring mode of the electric energy meter according to the power load attributes and the collected power factor data, specifically includes: Voltage phase sequence judgment: Obtaining a voltage phase difference △θu12 between the first phase and the second phase, and obtaining a voltage phase difference △θu23 between the second phase and the third phase; If 110°≤△θu12≤130° and 110°≤△θu23≤130°, it is judged to be a positive phase sequence; If -130°≤△θu12≤110° and -130°≤△θu23≤-110°, it is determined to be a reverse phase sequence; in other cases, the phase sequence cannot be determined.

4. The method for detecting abnormal power consumption of an electric energy meter according to claim 3, wherein: The step S101: determining the incorrect wiring mode of the electric energy meter according to the power load attributes and the collected power factor data, specifically includes: Current phase sequence judgment: Obtaining a current phase difference △θI12 between the first phase and the second phase, and obtaining a current phase difference △θI23 between the second phase and the third phase; If △θI12 and △θI23 are both greater than 0, it is judged to be a positive phase sequence; If ΔθI12 is greater than 0 and Δθ23 is less than 0, it is determined to be a reverse phase sequence.

5. The method for detecting abnormal power consumption of an electric energy meter according to claim 4, characterized in that: S102: determining the specific wiring mode of the electric energy meter based on the voltage phase sequence, current phase sequence, and power factor angle of each phase in the incorrect wiring state, and obtaining a vector diagram of the electric energy meter wiring and an incorrect wiring diagram; specifically includes: Calculating the absolute value of the power factor angle of each phase based on the collected power factor of each phase, and determining whether the power factor angle of each phase is greater than 0 or less than 0 based on the positive and negative signs of the collected reactive power of each phase; The power factor angle under the incorrect wiring state is calculated based on the absolute value of the power factor angle calculated above.

6. The method for detecting abnormal power consumption of an electric energy meter according to any one of claims 1 to 5, characterized in that: The calculation of the required amount of electricity to be supplemented ∆W=W'*(K-1) based on the correction coefficient K and the erroneous electricity W' specifically includes: By real-time monitoring of voltage mutations, when the mutation rate is ≥30% of the rated value and the duration is ≤10ms, the fault start timestamp t1 and W1 are automatically recorded; When the voltage returns to a steady state and remains so for 5 minutes with a fluctuation of ≤±2%, the fault end timestamp t2 is automatically recorded, and W2 is also recorded.

7. A system for detecting abnormal power consumption of an electric energy meter, characterized in that: The system is used to run the above-mentioned method for detecting abnormal power consumption of electric energy meters, and the system includes: a signal sampling module, a signal processing module, a metering device abnormality detection and analysis module, and an electric energy replenishment calculation module; The electric quantity supplement calculation module includes: an electric energy meter detection function analysis module, a meter reading function module, and an electric quantity supplement analysis and calculation processing module.

8. The system for detecting abnormal power consumption of an electric energy meter according to claim 7, characterized in that: The electric energy meter detection function analysis module is connected to the electric energy meter being tested on site, and collects the electric energy meter's power parameter data, including: the voltage, current, power factor and other power parameter data information of the electric energy meter circuit, and automatically analyzes and calculates to generate a vector diagram, judges the incorrect wiring of the electric energy meter based on the vector diagram, and generates an electric energy meter wiring diagram based on the wiring situation, so as to analyze and judge the wiring situation of the electric energy meter and other fault problems, and provide fault cause analysis for the accurate calculation of the electric energy meter's electricity quantity.

9. The system for detecting abnormal electricity consumption of an electric energy meter according to claim 8, characterized in that: The meter reading function module collects load curve records such as voltage, current, power factor, etc. required for electricity replenishment, as well as power parameter records such as electricity data, instantaneous variable data, event data, timed freeze data, and time period table data, and realizes comprehensive analysis of historical data and on-site detection data to intelligently calculate the electricity that needs to be replenished during the metering fault period.

10. The system for detecting abnormal power consumption of an electric energy meter according to claim 9, characterized in that: The electricity replenishment analysis and calculation processing module conducts a comprehensive analysis of the read electricity meter data based on the power parameter data, vector diagram, wiring method judgment, and fault type judgment detected by the electricity meter, and provides a calculation formula for the electricity that needs to be replenished based on the fault type, and calculates the electricity that needs to be replenished.

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