Method for identifying abnormal superposition wiring fault of electric energy meter and related product

Abstract

The invention discloses a method for identifying an abnormal superposition wiring fault of an electric energy meter and a related product, and relates to the technical field of power systems. The method comprises the following steps: acquiring an A-phase power factor and a C-phase power factor of the electric energy meter at each sampling time point in a preset time period; within the preset time period, determining an abnormal time point when the absolute value of the ratio of the A-phase power factor to the C-phase power factor is within a preset ratio range; and in response to the condition that the ratio of the number of the abnormal time points to the total number of the sampling time points in the preset time period is greater than a first preset ratio threshold value, judging that the electric energy meter has an abnormal superposed wiring fault. According to the method, the wiring fault of the high-voltage three-phase three-wire electric energy meter is identified according to the characteristic that the A-phase power factor and the C-phase power factor of the high-voltage three-phase three-wire electric energy meter are equal under the condition that six types of abnormal superposition wiring exist.

Description

Technical Field

[0001] This application generally relates to the field of power system technology. More specifically, this application relates to a method and related products for identifying abnormal superimposed wiring faults in electricity meters. Background Technology

[0002] In modern power systems, high-load users such as industrial enterprises, high-pressure irrigation stations, and large commercial enterprises are typically supplied with power by high-voltage power supply systems such as 10kV, 35kV, and 110kV. In these high-voltage power supply systems, high-voltage three-phase three-wire energy meters are used to accurately measure the electrical energy of high-voltage users. The correctness of their wiring, the stability of their operation, and the accuracy of their data are crucial to the economic dispatching, load management, and energy efficiency analysis of the power grid. Even a minor wiring error can lead to significant metering errors, causing serious economic losses or triggering trade disputes.

[0003] There are 48 common wiring types for three-phase three-wire electricity meters. Among these 48 common wiring methods, abnormal wiring can be divided into single abnormal wiring methods and overlapping abnormal wiring methods. Among the overlapping abnormal wiring methods, there are 6 types that are difficult to identify directly from the electricity meter data. In cases of multiple overlapping wiring abnormalities, the surface data such as voltage, current, power, and power factor of these 6 overlapping abnormal wiring methods may appear to be within the normal range, but the electricity metering has already become incorrect. The long-term accumulation of metering errors can evolve into huge disputes over electricity refunds and subsidies.

[0004] In view of this, this application proposes a method and related products for identifying abnormal superimposed wiring faults in electricity meters, so as to accurately identify the above six abnormal superimposed wiring methods. Summary of the Invention

[0005] In order to at least solve one or more of the technical problems mentioned above, this application proposes a method and related product scheme for identifying abnormal superimposed wiring faults in electricity meters in several aspects.

[0006] In a first aspect, this application provides a method for identifying abnormal superimposed wiring faults in an electricity meter, comprising: acquiring the A-phase power factor and C-phase power factor of the electricity meter at various sampling time points within a preset time period; determining abnormal time points within the preset time period where the absolute value of the ratio of the A-phase power factor to the C-phase power factor is within a preset ratio range; and determining that the electricity meter has an abnormal superimposed wiring fault in response to the ratio of the number of abnormal time points to the total number of sampling time points within the preset time period being greater than a first preset ratio threshold.

[0007] In a second aspect, this application provides an electronic device, including: a processor; and a memory storing program code for identifying abnormal superimposed wiring faults in an electricity meter, wherein when the program code is executed by the processor, the electronic device performs the method described in the first aspect.

[0008] In a third aspect, this application provides a non-transitory machine-readable storage medium having stored program code thereon for identifying abnormal superimposed wiring faults in an electricity meter, wherein when the program code is executed by a processor, it causes the method described in the first aspect to be implemented.

[0009] Using the method, electronic equipment, and non-transitory machine-readable storage medium for identifying abnormal superimposed wiring faults in electricity meters as described above, this application identifies wiring faults in high-voltage three-phase three-wire electricity meters based on the characteristic that the power factors of phase A and phase C are equal when six types of abnormal superimposed wiring exist. In the prior art, the six types of abnormal superimposed wiring are difficult to identify, while the solution proposed in this application can effectively and accurately identify such abnormal superimposed wiring faults. Attached Figure Description

[0010] The above and other objects, features, and advantages of exemplary embodiments of this application will become readily understood by reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of this application are illustrated by way of example and not limitation, and the same or corresponding reference numerals denote the same or corresponding parts, wherein:

[0011] Figure 1 A schematic diagram illustrating the normal wiring of a high-voltage three-phase three-wire energy meter in some embodiments of this application is shown.

[0012] Figure 2 An exemplary schematic diagram of a first abnormal superimposed wiring method in some embodiments of this application is shown.

[0013] Figure 3 An exemplary schematic diagram of a second abnormal superimposed wiring method is shown in some embodiments of this application.

[0014] Figure 4 An exemplary schematic diagram of a third abnormal superimposed wiring method in some embodiments of this application is shown.

[0015] Figure 5 An exemplary schematic diagram of a fourth abnormal superimposed wiring method in some embodiments of this application is shown.

[0016] Figure 6 An exemplary schematic diagram of a fifth abnormal superimposed wiring method in some embodiments of this application is shown.

[0017] Figure 7 An exemplary schematic diagram of the sixth abnormal superimposed wiring method in some embodiments of this application is shown.

[0018] Figure 8 An exemplary schematic diagram showing the relationship between apparent power, active power, and reactive power in some embodiments of this application is illustrated.

[0019] Figure 9 A block diagram is shown illustrating a hardware configuration of an electronic device that can implement some embodiments of this application. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] It should be understood that the terms "comprising" and "including" used in the specification and claims of this application indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0022] It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application. As used in this specification and claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in this specification and claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations.

[0023] As used in this specification and claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if [described condition or event] is detected" may be interpreted, depending on the context, as "once determined," "in response to determination," "once [described condition or event] is detected," or "in response to detection of [described condition or event]."

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise expressly specified. "Several" means one or more, unless otherwise expressly specified.

[0025] The specific embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0026] Figure 1 This document illustrates exemplary wiring diagrams of high-voltage three-phase three-wire energy meters according to some embodiments of this application. Figure 1 As shown, in some embodiments, the three-phase power supply can be a three-phase generator or transformer, used to output stable and efficient three-phase electricity; the three-phase electricity consists of three alternating currents with the same frequency, equal amplitude, and phases differing by 120°, respectively corresponding to... Figure 1 The three-phase three-wire energy meter consists of phases A, B, and C. It includes two single-phase voltage transformers (VT), two current transformers (CT), and two measuring elements (ME).

[0027] continue Figure 1 Two voltage transformers, VT1 and VT2, are connected in a V / V configuration. The primary winding of VT1 is connected to phase A and phase B respectively to collect line voltage data. The primary winding of VT2 is connected to phase C and phase B respectively to collect line voltage. Each of the secondary windings of VT1 and VT2 has two terminals. Terminal a of the secondary winding of VT1 is connected to terminal Ua of ME1, and terminal a of the secondary winding of VT2 is connected to terminal Uc of ME2. The terminals x of the secondary windings of VT1 and VT2 are connected together and then connected to the common terminal of the energy meter. Therefore, the output voltage of the secondary winding of VT1... Output voltage of the secondary windings of ME1 and VT2 To ME2. Figure 1 Of the two current transformers, the primary side of CT1 is connected to phase A, and the primary side of CT2 is connected to phase C. The K1 terminal of the secondary winding of CT1 is connected to the current inflow terminal (Ia) of ME1. + Terminal K2 is connected to the current output terminal (Ia) of ME1. - ), thus CT1 transmits the current Transform into Then input ME1. The K1 terminal of the CT2 secondary winding is connected to the current inflow terminal (Ic) of ME2. + Terminal K2 is connected to the current output terminal (Ic) of ME2. - ), thus CT2 transmits the current Transform into Then enter ME2.

[0028] Thus, ME1 acquired the voltage signal. and current signal ME2 collected voltage signals. and current signal ME1 according to as well as Calculate the active power of phase A ME2 according to as well as Calculate the active power of phase B ,in This represents the load power factor angle. Because the three-phase three-wire system is symmetrical, adding the active power of phases A and B yields the total secondary power. U can be or I can be or Furthermore, the microprocessor inside the electricity meter can convert the total secondary power into the total primary power based on the transformation ratios of VT and CT. ,in Integrating the total primary power over time yields the accumulated electrical energy. .

[0029] The wiring of a three-phase energy meter includes wiring for the voltage section and wiring for the current section. Wiring for the voltage section includes connecting terminal a of the secondary winding of VT1 to terminal Ua of ME1, connecting terminal a of the secondary winding of VT2 to terminal Uc of ME2, and connecting the x terminals of the secondary windings of VT1 and VT2 to the common terminal. Errors in this type of wiring include reverse polarity, missing phase, and incorrect phase connection. Wiring for the current section includes connecting terminal K1 of the secondary winding of CT1 to terminal Ia of ME1. + Terminal K2 is connected to ME1's Ia. - Terminal; Connect the K1 terminal of the CT2 secondary winding to the Ic terminal of ME2. + Terminal K2 is connected to the IC of ME2. - Terminals. Errors in this type of wiring include reverse polarity of secondary input terminals, short circuits, current phase mismatch, and reverse connection of current input and current output terminals.

[0030] Based on the voltage wiring method, three positive phase sequences (ABC, BCA, CAB) and three negative phase sequences (ACB, BAC, CBA) can be obtained. Based on the current wiring method, eight current combinations can be obtained. Combining the six voltage wiring methods and the eight current wiring methods yields 48 possible wiring methods for a three-phase three-wire energy meter. Among these 48 wiring methods, abnormal wiring methods can be divided into single abnormal wiring methods and superimposed abnormal wiring methods. Single abnormal wiring methods include the aforementioned voltage wiring issues such as reverse polarity, phase loss, and phase misalignment, as well as current wiring issues such as reverse polarity, short circuit, current phase misalignment, and reverse connection between the current input and output terminals. Superimposed abnormal wiring methods can include any combination of the above two abnormalities. Among the superimposed abnormal wiring methods, there are six types of superimposed abnormal wiring methods that are difficult to identify directly from the energy meter data.

[0031] Figure 2 An exemplary schematic diagram of a first abnormal superimposed wiring method in some embodiments of this application is shown. For example... Figure 2 As shown, in the first abnormal superimposed wiring method, the A and C phase currents are out of phase and the polarity of the A phase current is reversed. Figure 2 The phasor diagram corresponding to the first abnormal superimposed wiring method is further shown. In this case, the energy meter measures the total active power. .

[0032] Figure 3 An exemplary schematic diagram of a second abnormal superimposed wiring method in some embodiments of this application is shown. For example... Figure 3 As shown, in the second abnormal superimposed wiring method, the voltages of phases B and C are out of phase and the polarity of the current of phase C is reversed. Figure 3 The phasor diagram corresponding to the second abnormal superposition wiring method is further shown. In this case, the energy meter measures the total active power. .

[0033] Figure 4 An exemplary schematic diagram of a third abnormal superimposed wiring method in some embodiments of this application is shown. For example... Figure 4 As shown, in the third abnormal superimposed wiring method, the voltages of phases A and B are out of phase and the polarity of the current of phase A is reversed. Figure 4 The phasor diagram corresponding to the third abnormal superposition wiring method is further shown. In this case, the energy meter measures the total active power. .

[0034] Figure 5 An exemplary schematic diagram of a fourth abnormal superimposed wiring method in some embodiments of this application is shown. For example... Figure 5 As shown, in the fourth abnormal superimposed wiring method, the voltages of phases A and C are out of phase and the polarity of the current of phase A is reversed. Figure 5The phasor diagram corresponding to the fourth abnormal superposition wiring method is further shown. In this case, the energy meter measures the total active power. .

[0035] Figure 6 An exemplary schematic diagram of a fifth abnormal superimposed wiring method in some embodiments of this application is shown. For example... Figure 6 As shown, in the fifth abnormal superimposed wiring method, the voltages of phases B and C are out of phase and the polarity of the current of phase C is reversed. Figure 6 The phasor diagram corresponding to the fifth abnormal superposition wiring method is further shown. In this case, the energy meter measures the total active power. .

[0036] Figure 7 An exemplary schematic diagram of the sixth abnormal superimposed wiring method in some embodiments of this application is shown. For example... Figure 7 As shown, in the sixth abnormal superimposed wiring method, the voltages of phases A and B are out of phase and the polarity of the current of phase A is reversed. Figure 7 The phasor diagram corresponding to the sixth abnormal superposition wiring method is further shown. In this case, the energy meter measures the total active power. .

[0037] Among the six types of abnormal wiring configurations mentioned above, high-voltage three-phase three-wire energy meters exhibit multiple types of anomalies simultaneously. When multiple wiring anomalies overlap, surface data such as voltage, current, power, and power factor may appear to be within normal ranges, but the electricity measurement has already become erroneous. The long-term accumulation of these measurement errors can escalate into huge disputes over electricity refunds. In other words, these six types of abnormal wiring configurations are difficult to identify, presenting numerous challenges such as difficulty in verification and the difficulty in calculating refund amounts, becoming a "blind spot" for frontline operators and an "economic black hole" for power supply companies. However, the inventors of this application, through phasor diagram analysis and total active power analysis of the energy meters, discovered that in high-voltage three-phase three-wire energy meters with these six abnormal wiring configurations, the power factors of phase A and phase C are theoretically equal. Based on this characteristic, the abnormal wiring faults in the energy meter can be accurately identified. Therefore, this application proposes a method for identifying abnormal wiring faults in energy meters to accurately identify the six types of abnormal wiring configurations.

[0038] In some embodiments, the method for identifying abnormal superimposed wiring faults in an energy meter in this application includes: obtaining the A-phase power factor and C-phase power factor of the energy meter at each sampling time point within a preset time period; determining abnormal time points within the preset time period where the absolute value of the ratio of the A-phase power factor to the C-phase power factor is within a preset ratio range; and determining that the energy meter has an abnormal superimposed wiring fault in response to the ratio of the number of abnormal time points to the total number of sampling time points within the preset time period being greater than a preset ratio threshold.

[0039] The method proposed in this application for identifying abnormal superimposed wiring faults in electricity meters can be used to identify the six abnormal superimposed wiring methods described above for high-voltage three-phase three-wire electricity meters. This facilitates early detection, early prevention, and early handling of the above six abnormal superimposed wiring faults, thereby significantly reducing economic losses in power supply, lowering the risk of customer complaints, improving the technical level of meter installation and connection management, and ensuring the accuracy and fairness of power equipment metering during operation.

[0040] In some embodiments, the electricity meter can periodically collect various electrical parameters. For example, the electricity meter can collect data at a frequency of 96 sampling points per day, and the collected electrical parameters include the output voltage of the secondary winding of VT1. Output voltage of VT2 secondary winding Output current of CT1 secondary winding Output current of CT2 secondary winding Furthermore, the metering unit in the electricity meter can calculate total active power (P), total reactive power (Q), apparent power (S), A-phase power factor, C-phase power factor, and overall power factor based on the collected voltage and current data. In these embodiments, the A-phase power factor... C-phase power factor ;in, , These represent the power factors of phases A and C, respectively. , These represent the apparent power of phases A and C, respectively. , These represent the voltage amplitudes of phases A and C, respectively. , These represent the current amplitudes of phases A and C, respectively. In some embodiments, the energy meter can determine the current amplitudes based on the turns ratios of CT1 and CT2. , Convert to , Then according to , To get , In some embodiments, the electricity meter can be configured to convert the voltage between VT1 and VT2 based on their respective turns ratios. , Convert to , Then according to , To calculate , .

[0041] This application can obtain the A-phase power factor and C-phase power factor of an electricity meter at various sampling time points within a preset time period. For example, the preset time period can be one day, and the electricity meter samples electrical quantities at N1 time points within that day, obtaining the power factors of phase A and phase C at N1 time points throughout the day. Let Pf be the phase A power factor at time t. a The C-phase power factor at time t is Pf c ,if If the sampling point is within a preset ratio range, then time t is considered an abnormal sampling point. Let N2 be the number of abnormal sampling points out of N1 sampling time points within a day. If... If the value is greater than the preset ratio threshold, it is considered that the electricity meter has an abnormal superimposed wiring fault.

[0042] Understandably, this application identifies wiring faults in high-voltage three-phase three-wire energy meters based on the characteristic that the power factors of phase A and phase C are equal under six types of abnormal overlapping wiring conditions. In existing technologies, the six types of abnormal overlapping wiring are difficult to identify, while the solution proposed in this application can effectively and accurately identify such abnormal overlapping wiring faults.

[0043] In some embodiments, the abnormal superimposed wiring faults include: phase A and phase C currents are out of phase and phase A current polarity is reversed; phase B and phase C voltages are out of phase and phase C current polarity is reversed; phase A and phase B voltages are out of phase and phase A current polarity is reversed; phase A and phase C voltages are out of phase and phase A current polarity is reversed; phase B and phase C voltages are out of phase and phase C current polarity is reversed; and phase A and phase B voltages are out of phase and phase A current polarity is reversed.

[0044] Combination Figure 2 The A and C phase current misalignment means that the output terminal of the secondary winding of CT1 is connected to the two current terminals of ME2, and the output terminal of the secondary winding of CT2 is connected to the two current terminals of ME1; the A phase current polarity reversal means that the K1 terminal of the secondary winding of CT1 is connected to the current output terminal of ME2, and the K2 terminal is connected to the current input terminal of ME2.

[0045] Combination Figure 3 The phase reversal of phases B and C means that the x terminal of the secondary windings of VT1 and VT2 is connected to the Uc terminal of ME2, and the a terminal of the secondary winding of VT2 is connected to the common terminal of ME1 and ME2; the reverse polarity of phase C current means that the K1 terminal of the secondary winding of CT2 is connected to the current output terminal of ME2, and the K2 terminal is connected to the input terminal of ME2.

[0046] Combination Figure 4The phase reversal of phases A and B means that the a terminal of the secondary winding of VT1 is connected to the common terminal of ME1 and ME2, and the x terminal of the secondary windings of VT1 and VT2 is connected to the Ua terminal of ME1; the phase A current polarity reversal means that the K1 terminal of the secondary winding of CT1 is connected to the current output terminal of ME1, and the K2 terminal is connected to the current input terminal of ME1.

[0047] Combination Figure 5 The phase reversal of phases A and C means that the a terminal of the secondary winding of VT1 is connected to the Uc terminal of ME2, and the a terminal of the secondary winding of VT2 is connected to the Ua terminal of ME1; the phase A current polarity reversal means that the K1 terminal of the secondary winding of CT1 is connected to the current output terminal of ME1, and the K2 terminal is connected to the current input terminal of ME1.

[0048] Combination Figure 6 Looking at the diagram, phase B and phase C voltage reversal means that terminal a of the secondary winding of VT2 is connected to the common terminal of ME1 and ME2, terminal x of the secondary windings of VT1 and VT2 is connected to terminal Ua of ME1, and terminal a of the secondary winding of VT1 is connected to terminal Uc of ME2; phase C current polarity reversal means that terminal K1 of the secondary winding of CT2 is connected to the current output terminal of ME1, and terminal K2 is connected to the current input terminal of ME1.

[0049] Combination Figure 7 In this context, phase A and phase B voltage reversal means that terminal a of the secondary winding of VT1 is connected to the common terminal of ME1 and ME2, terminals x of the secondary windings of VT1 and VT2 are connected to terminal Uc of ME2, and terminal a of the secondary winding of VT2 is connected to terminal Ua of ME1. Phase A current polarity reversal means that terminal K1 of the secondary winding of CT1 is connected to the current output terminal of ME2, and terminal K2 is connected to the current input terminal of ME2.

[0050] In some embodiments, the preset ratio range includes [90%, 110%]. In these embodiments, when the absolute value of the ratio of the A-phase power factor to the C-phase power factor corresponding to the sampling time point is within [90%, 110%], the sampling point is determined to be an abnormal time point.

[0051] In some embodiments, the first preset ratio threshold includes 90%, 92%, or 95%. In these embodiments, when the ratio of the number of abnormal time points to the total number of sampling time points within a preset time period is greater than 90%, 92%, or 95%, it can be considered that the electricity meter has an abnormal superimposed wiring fault.

[0052] Figure 8 An exemplary schematic diagram illustrating the relationship between apparent power, active power, and reactive power in some embodiments of this application is shown. For example... Figure 8 As shown, when a high-voltage three-phase three-wire energy meter is correctly wired, the total active power is... Total reactive power Apparent power When the load is purely resistive, the voltage and current are in phase, and the overall power factor is... When the total active power P is equal to 1 under the same load, P = S; when the load is purely inductive or purely capacitive, the total power factor is 1. When the value equals 0, the total reactive power Q is at its maximum under the same load, and Q=S. Based on this, this application proposes the following embodiments to facilitate the following: after determining that the energy meter has an abnormal superimposed wiring fault based on the ratio of the number of abnormal time points to the total number of sampling time points within a preset time period, the accuracy of the judgment that "the energy meter has an abnormal superimposed wiring fault" is further verified based on the apparent power within the preset time period and the total active power / total reactive power.

[0053] In some embodiments, after determining that the energy meter has an abnormal superimposed wiring fault based on the ratio of the number of abnormal time points to the total number of sampling time points within a preset time period, the method includes: obtaining the total active power and apparent power of the energy meter at each sampling time point within the preset time period; and determining that the energy meter has an abnormal superimposed wiring fault in response to each sampling time point within the preset time period satisfying that the total active power is greater than the apparent power.

[0054] In some embodiments, after determining that the energy meter has an abnormal superimposed wiring fault based on the ratio of the number of abnormal time points to the total number of sampling time points within a preset time period, the method includes: obtaining the total reactive power and apparent power of the energy meter at each sampling time point within the preset time period; and determining that the energy meter has an abnormal superimposed wiring fault in response to each sampling time point within the preset time period satisfying that the total reactive power is greater than the apparent power.

[0055] In some embodiments, the high-voltage three-phase three-wire energy meter collects electrical parameters at 96 time points every day. If the total active power P at each of the 96 time points collected each day is greater than the apparent power S, or the total reactive power Q at each of the 96 time points is greater than the apparent power S, then the judgment that "the energy meter has an abnormal superimposed wiring fault" is correct.

[0056] In general AC circuits, the transmitted power includes both active and reactive power. The power factor is typically assessed at three levels: 0.90, 0.85, and 0.80. According to the "Electricity Supply Business Rules" and the local "Power Factor Adjustment Electricity Fee Method," the mainstream power factor assessment standards for user types are shown in Table 1 below. It is understandable that, without wiring abnormalities, even for the lowest-standard user, the total active power P should be ≥0.8×S. If P < 0.8×S, it indicates that the measured P value is lower than the minimum value for all reasonable scenarios, inevitably indicating a metering logic abnormality. Based on this, this application discloses the following embodiments to verify the correctness of the judgment that "the electricity meter has an abnormal superimposed wiring fault" based on the total active power, apparent power, and power factor assessment standards.

[0057] In some embodiments, after determining that the energy meter has an abnormal superimposed wiring fault based on the ratio of the number of abnormal time points to the total number of sampling time points within a preset time period, the method includes: obtaining the total active power and apparent power of the energy meter at each sampling time point within the preset time period; and determining that the energy meter has an abnormal superimposed wiring fault in response to each sampling time point within the preset time period satisfying that the ratio of the total active power to the apparent power is less than a second preset ratio threshold.

[0058] In some embodiments, the second preset ratio threshold includes 80%.

[0059] Corresponding to the aforementioned application function implementation method embodiments, this application also provides an electronic device and corresponding embodiments.

[0060] Figure 9 A block diagram illustrating a hardware configuration that can implement some embodiments of the electronic device 900 of this application is shown. Figure 9 As shown, the electronic device 900 may include a processor 910 and a memory 920. Figure 9 In the electronic device 900, only the components relevant to this embodiment are shown. Therefore, it will be apparent to those skilled in the art that the electronic device 900 may also include components related to... Figure 9 The following are common components with different constituent elements. For example, a fixed-point arithmetic unit.

[0061] Electronic device 900 can correspond to a computing device with various processing functions, such as functions for generating neural networks, training or learning neural networks, quantizing floating-point neural networks into fixed-point neural networks, or retraining neural networks. For example, electronic device 900 can be implemented as various types of devices, such as personal computers (PCs), server devices, mobile devices, etc.

[0062] The processor 910 controls all functions of the electronic device 900. For example, the processor 910 controls all functions of the electronic device 900 by executing programs stored in the memory 920 on the electronic device 900. The processor 910 can be implemented by a central processing unit (CPU), graphics processing unit (GPU), application processor (AP), artificial intelligence processor chip (IPU), etc., provided in the electronic device 900. However, this application is not limited to this.

[0063] In some embodiments, the processor 910 may include an input / output (I / O) unit 911 and a computing unit 912. The I / O unit 911 may be used to receive various types of data, such as data collected from an electricity meter. Exemplarily, the computing unit 912 may be used to process the electricity meter data received via the I / O unit 911, and the processing result may be output by the I / O unit 911. The output data may be provided to a memory 920 for use by other devices (not shown), or it may be directly provided to other devices.

[0064] Memory 920 is hardware used to store various data processed in electronic device 900. For example, memory 920 can store processed data and data to be processed in electronic device 900. Furthermore, memory 920 can store applications, drivers, etc., to be driven by electronic device 900. For example, memory 920 can store various programs related to a method for identifying abnormal superimposed wiring faults in electricity meters, which will be executed by processor 910. Memory 920 can be DRAM, but this application is not limited to it. Memory 920 can include at least one of volatile memory or non-volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), flash memory, phase-change RAM (PRAM), magnetic RAM (MRAM), resistive RAM (RRAM), ferroelectric RAM (FRAM), etc. Volatile memory can include dynamic RAM (DRAM), static RAM (SRAM), synchronous DRAM (SDRAM), PRAM, MRAM, RRAM, ferroelectric RAM (FeRAM), etc. In some embodiments, the memory 920 may include at least one of a hard disk drive (HDD), a solid-state drive (SSD), a high-density flash memory (CF), a secure digital card (SD), a micro-secure digital card (Micro-SD), a mini-secure digital card (Mini-SD), an extreme digital card (xD), caches, or a memory stick.

[0065] In summary, the specific functions implemented by the memory 920 and processor 910 of the electronic device 900 provided in this specification can be explained in comparison with the aforementioned embodiments in this specification, and can achieve the technical effects of the aforementioned embodiments. Therefore, they will not be repeated here.

[0066] In this embodiment, the processor 910 can be implemented in any suitable manner. For example, the processor 910 can take the form of a microprocessor or processor and a computer-readable medium storing computer-readable program code (e.g., software or firmware) that can be executed by the (micro)processor, logic gates, switches, application-specific integrated circuits (ASICs), programmable logic controllers, and embedded microcontrollers, etc.

[0067] It should also be understood that any module, unit, component, server, computer, terminal, or device that executes the instructions executorized herein may include or otherwise access computer-readable media, such as storage media, computer storage media, or data storage devices (removable) and / or non-removable) such as disks, optical discs, or magnetic tapes. Computer storage media may include volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information, such as computer-readable instructions, data structures, program modules, or other data.

[0068] Table 1. Mainstream Power Factor Assessment Standards

[0069] While numerous embodiments of this application have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Many modifications, alterations, and alternatives will arise for those skilled in the art without departing from the spirit and intent of this application. It should be understood that various alternatives to the embodiments of this application described herein may be employed in the practice of this application. The appended claims are intended to define the scope of protection of this application and therefore cover equivalents or alternatives within the scope of these claims.

Claims

1. A method for identifying abnormal superimposed wiring faults in electricity meters, characterized in that, include: Obtain the A-phase power factor and C-phase power factor of the energy meter at each sampling time point within a preset time period; Within the preset time period, identify abnormal time points where the absolute value of the ratio of the power factor of phase A to the power factor of phase C is within the preset ratio range; If the ratio of the number of abnormal time points to the total number of sampling time points within the preset time period is greater than a first preset ratio threshold, it is determined that the electricity meter has an abnormal superimposed wiring fault.

2. The method according to claim 1, characterized in that, The abnormal superimposed wiring faults include: The phase currents of phases A and C are out of phase and the polarity of phase A current is reversed; The voltages of phases B and C are out of phase and the polarity of the current in phase C is reversed. The voltages of phases A and B are out of phase and the polarity of the current in phase A is reversed; The voltages of phases A and C are out of phase and the polarity of the current in phase A is reversed; Phase B and C voltages are out of phase and phase C current polarity is reversed; and The voltages of phases A and B are out of phase, and the polarity of the current in phase A is reversed.

3. The method according to claim 1, characterized in that, The preset ratio range includes: [90%, 110%].

4. The method according to claim 1, characterized in that, The first preset ratio threshold includes: 90%, 92%, or 95%.

5. The method according to claim 1, characterized in that, After determining that the electricity meter has an abnormal superimposed wiring fault based on the ratio of the number of abnormal time points to the total number of sampling time points within the preset time period, the process includes: Obtain the total active power and apparent power of the energy meter at each sampling time point within the preset time period; If, at each sampling time point within the preset time period, the total active power is greater than the apparent power, it is determined that the energy meter has an abnormal superimposed wiring fault.

6. The method according to claim 1, characterized in that, After determining that the electricity meter has an abnormal superimposed wiring fault based on the ratio of the number of abnormal time points to the total number of sampling time points within the preset time period, the process includes: The total reactive power and apparent power of the energy meter are obtained at each sampling time point within the preset time period. If, at each sampling time point within the preset time period, the total reactive power is greater than the apparent power, it is determined that the energy meter has an abnormal superimposed wiring fault.

7. The method according to claim 1, characterized in that, After determining that the electricity meter has an abnormal superimposed wiring fault based on the ratio of the number of abnormal time points to the total number of sampling time points within the preset time period, the process includes: Obtain the total active power and apparent power of the energy meter at each sampling time point within the preset time period; If, at each sampling time point within the preset time period, the ratio of total active power to apparent power is less than a second preset ratio threshold, it is determined that the energy meter has an abnormal superimposed wiring fault.

8. The method according to claim 7, characterized in that, The second preset ratio threshold includes 80%.

9. An electronic device, characterized in that, include: processor; as well as The memory stores program code for identifying abnormal superimposed wiring faults in the electricity meter, and when the program code is executed by the processor, the electronic device implements the method as described in any one of claims 1-8.

10. A non-transitory machine-readable storage medium having stored thereon program code for identifying abnormal superimposed wiring faults in an electricity meter, wherein when the program code is executed by a processor, it causes the method of any one of claims 1-8 to be implemented.

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