A method for calculating the source of power traceability under incorrect wiring of a three-phase four-wire smart meter

Abstract

This invention discloses a method for calculating traceable electricity consumption under incorrect wiring conditions of a three-phase four-wire smart meter. The method includes: acquiring various electrical parameters and active and reactive energy consumption data from the three-phase smart meter via meter reading or by viewing the meter's display screen; calculating and supplementing the phase angle using the acquired electrical parameters; analyzing the meter's wiring result using the acquired electrical parameters and the calculated voltage-current phase angle, or obtaining the meter's wiring result after verification using measuring tools; combining the incorrect wiring of the meter with the acquired energy data to calculate traceable actual electricity consumption; and displaying the correctly calculated electricity consumption and the supplemented electricity consumption. This invention calculates traceable actual electricity consumption and supplements it under incorrect wiring conditions of a three-phase four-wire smart meter, avoiding energy loss caused by incorrect meter wiring.

Description

Technical Field

[0001] This invention relates to the field of power measurement technology, and more specifically, to a method for calculating the source of electrical energy under incorrect wiring conditions of a three-phase four-wire smart meter. Background Technology

[0002] Electricity meters are devices that measure users' electricity consumption and are the main basis for power companies to collect electricity fees. However, due to maintenance of line equipment, negligence in work, or users' unauthorized modifications to the wiring, wiring errors can occur in the meters, leading to metering malfunctions. Once wiring errors or other malfunctions occur, the actual electricity consumption will be inconsistent with the metered consumption, which will have a significant impact on power companies and users in the long run.

[0003] However, there are various types of incorrect wiring in three-phase four-wire smart meters. This invention addresses metering faults caused by incorrect wiring connections between the secondary circuit and the AC sampling device in three-phase four-wire smart meters without phase loss. Such metering faults often lead to power metering losses, but traditional methods for correcting incorrect wiring require power personnel to possess advanced theoretical knowledge and extensive practical experience. Furthermore, the energy recovery for incorrectly wired meters is only an estimate based on the current load, lacking traceability. Therefore, the ability to conveniently and quickly calculate traceable correct power consumption based on incorrect wiring types is crucial for balancing the rights of both power companies and users. Summary of the Invention

[0004] To address the aforementioned phenomena and problems, this invention provides a method for calculating the source of electricity traceability under incorrect wiring conditions of a three-phase four-wire smart meter. The method uses measuring instruments, such as a field calibrator, to determine the type of incorrect wiring, calculates the voltage-current angle based on the type of incorrect wiring, and calculates and corrects the correct electricity consumption by combining the original electricity consumption data of the meter.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A method for calculating the source of power traceability under incorrect wiring of a three-phase four-wire smart meter, the calculation method specifically includes the following steps:

[0007] Step 1, Data Acquisition: Obtain various electrical parameters and the power consumption data of each active and reactive energy from the three-phase electricity meter by reading the meter or viewing the data on the electricity meter display screen.

[0008] Step 2, Calculation of the pressure-flow angle: The phase angle is calculated and supplemented by collecting electrical parameter information;

[0009] Step 3, Error Wiring Type Judgment: The wiring result of the energy meter is analyzed by collecting electrical parameter information and calculating the voltage-current phase angle, or the wiring result of the energy meter is obtained after judgment by measuring tools;

[0010] Step 4: Measure the correct electricity consumption: Combine the incorrect connection of the electricity meter with the collected electricity data to complete the traceable calculation of the actual electricity consumption;

[0011] Step 5, Output Results: Display the correctly calculated battery level and the supplemented battery level.

[0012] Furthermore, step 1 specifically includes:

[0013] Real-time electricity consumption data of three-phase electricity meters can be collected through carrier communication or RS485 communication using DL / T645 or DL / T698.45 protocols. Alternatively, electricity consumption data for a certain period of time can be obtained by viewing and recording the data displayed on the electricity meter.

[0014] The electrical parameter information includes the three-phase voltage, three-phase current, angle between each phase voltage, and angle between each phase voltage and current of the smart energy meter during the time period.

[0015] The active and reactive power consumption data include the cumulative energy data of each phase's positive active power, each phase's negative active power, each phase's first quadrant reactive power, each phase's second quadrant reactive power, each phase's third quadrant reactive power, and each phase's fourth quadrant reactive power accumulated and recorded by the smart energy meter within a certain period.

[0016] Furthermore, step 2 specifically includes:

[0017] The obtained electrical parameter information is used to supplement the calculation of the phase angle between other related phase voltages and currents, which is used for the wiring analysis of the energy meter. The phase angle calculation formula is:

[0018] ∠U1U2=∠U1U3-∠U2I3

[0019] ∠I1I2=∠U1U2-∠U1I1+∠U2I2

[0020] =∠I1U2+∠U2I2

[0021] =∠I1I2

[0022] Where: ∠U1U2 is the voltage angle between element 1 and element 2; ∠U1U3 is the voltage angle between element 1 and element 3; ∠U2U3 is the voltage angle between element 2 and element 3; ∠U1I1 is the angle between the voltage and current of element 1; ∠U2I2 is the angle between the voltage and current of element 2; ∠I1I2 is the current angle between element 1 and element 2.

[0023] Furthermore, step 3 specifically includes:

[0024] The wiring errors of the three-phase line can be judged by a professional on-site calibration instrument; the wiring diagram of the three-phase four-wire smart energy meter can also be analyzed by the phase relationship calculated in step 2.

[0025] 1) Voltage phase sequence analysis:

[0026] Since the phase angle of each phase voltage in a three-phase four-wire system differs by approximately 120°, even when the power supply load is unstable, the phase difference is not significant. Only in the case of incorrect wiring will the phase angle of each phase voltage differ significantly. Therefore, the wiring phase sequence of the energy meter voltage can be analyzed based on the phase relationship between voltages.

[0027] When ∠U1U2 or ∠U2U3 are both around 120°, or ∠U1U3 is around 240°, if two or more of these conditions are met, the voltage connection can be confirmed as a positive phase sequence, and the voltage connection order is A, B, C. If only one angle is the same as the above angles, and the angles of the other two are different, the voltage connection can also be confirmed as a positive phase sequence, but the phases of the common components of these two components are reversed. For example, if ∠U1U2 is 120°, ∠U1U3 is 60°, and ∠U2U3 is 300°, then the three common components of ∠U1U3 and ∠U2U3 are reversed, and the voltage connection order is A, B, -C.

[0028] Similarly, when ∠U1U2 or ∠U2U3 are both around 240°, or ∠U1U3 is around 120°, if two or more of these conditions are met, the voltage connection can be confirmed as reverse phase sequence, and the voltage connection order is A, C, B. If only one of these conditions has the same angle as the above conditions, and the angles of the other two conditions are different, the voltage connection can also be confirmed as positive phase sequence. However, the phases of the common components of these two conditions are reversed. For example, if ∠U1U2 is 240°, ∠U1U3 is 300°, and ∠U2U3 is 60°, then the common three components of ∠U1U3 and ∠U2U3 are reversed, and the voltage connection order is A, -C, B.

[0029] 2) Current phase sequence analysis:

[0030] The current phase sequence analysis method is the same as the voltage phase sequence analysis method, only the analysis angle is different. The current phase sequence analysis is the phase angle between the three phase currents, namely ∠I1I2, ∠I2I3, ∠I1I3, to determine the connection phase sequence of the three phase currents.

[0031] 3) Error Wiring Analysis:

[0032] Taking a positive voltage phase sequence (A, B, C) and a positive current phase sequence (A, B, C) as an example, and analyzing the voltage-current angle of one of the components, there are six possible cases:

[0033] (1) When the angle between voltage and current is around 0°, the current follows the voltage phase sequence, that is: the voltage phase sequence is A, B, C; the current phase sequence is A, B, C.

[0034] (2) When the voltage leads the current by about 180°, the current phase sequence is reversed and then follows the voltage phase sequence, that is: the voltage phase sequence is A, B, C; the current phase sequence is -A, -B, -C.

[0035] (3) When the voltage leads the current by about 120°, the current phase sequence shifts forward by 1 position to follow the voltage phase sequence, that is: the voltage phase sequence is A, B, C; the current phase sequence is B, C, A;

[0036] (4) When the voltage leads the current by about 300°, the current phase sequence is shifted forward by 1 position and inverted, and then follows the voltage phase sequence. That is, the voltage phase sequence is A, B, C; the current phase sequence is -B, -C, -A.

[0037] (5) When the voltage lags the current by about 120°, the current phase sequence shifts back by 1 position to follow the voltage phase sequence, that is: the voltage phase sequence is A, B, C; the current phase sequence is C, A, B;

[0038] (6) When the voltage lags the current by about 300°, the current phase sequence is shifted back by 1 position and inverted, and then follows the voltage phase sequence. That is, the voltage phase sequence is A, B, C; the current phase sequence is -C, -A, -B.

[0039] Furthermore, step 4 specifically involves:

[0040] By utilizing the pressure-current angle data and phase diagram, and combining the incorrect wiring type of the energy meter, the various types of energy data recorded by the three-phase four-wire smart energy meter within a metering cycle are used to complete the traceable energy calculation and supplement through mathematical calculation methods.

[0041] The energy recovery algorithm is obtained by calculating arbitrary voltage, current, and phase angle between voltage and current in step 2. When the voltage connection is A, B, C and the current connection is B, A, C, the energy recovery algorithm is as follows:

[0042] The correct method for calculating active energy and active power is as follows:

[0043] W a =P a ·T=U a I a cosα·T

[0044] W b =P b·T=U b I b cosβ·T

[0045] W c =P c ·T=U c I c codγ·T

[0046] W z =W a +W b +W c =(P a +P b +P c )·T

[0047] P Z =P A +P B +P C

[0048] Active energy and active power calculated by a three-phase four-wire smart energy meter;

[0049] W1=P1·T=U1I1cosθ·T

[0050] W1=P1·T=U1I1cosθ·T

[0051] W2=P2·T=U2I2cosδ·T

[0052] W3=P3·T=U3I3cosγ·T

[0053] W h =W1+W2+W3=(P1+P2+P3)·T

[0054] in:

[0055] W a W b W c This corresponds to the active electrical energy supplied by the three phases of power supply lines A, B, and C.

[0056] P a P b P c This corresponds to the active power of the three-phase power supply in power lines A, B, and C;

[0057] W1, W2, W3: These correspond to the active energy measured by the first, second, and third elements of the electricity meter.

[0058] P1, P2, P3: These correspond to the active power measured by the first, second, and third elements of the electricity meter.

[0059] Since the three-phase voltage in a three-phase four-wire power supply line is approximately 220V, it can be assumed to be:

[0060] U a =U b =U c =U, that is, U1=U2=U3=U, and the angle between the three phase voltages is 120°, or the angle ω between the voltages can be regarded as 120°;

[0061] The correct algorithm for deriving the active power of phase A is as follows:

[0062]

[0063] Since I2 is in its third quadrant relative to U2, P2 is the reverse-phase active power, which is negative; Q2 is the reactive power in the third quadrant, which is also negative.

[0064] Therefore, the above formula can be optimized as follows:

[0065] Similarly, the correct algorithm for deriving the active power of phase B is as follows:

[0066]

[0067] Since I1 is in its second quadrant relative to U1, P1 is the reverse-phase active power, which is negative; while Q1 is the reactive power in the second quadrant, which is positive.

[0068] Therefore, the above formula can be optimized as follows:

[0069] There is no incorrect wiring in phase C, therefore: P c =U c I c cosγ=U3I3cosγ=P3

[0070] The accumulation of active and reactive energy is the accumulation of active and reactive power over a certain period of time. Therefore, the correct calculation and replenishment of electrical energy is the correct calculation and replenishment of active power.

[0071] The actual electrical energy of the power supply line can be further calculated as follows:

[0072]

[0073] in:

[0074] W x The sum of the positive and negative active power of a certain component;

[0075] C x The total reactive power of a component across its four quadrants;

[0076] Similarly, three-phase four-wire smart energy meters can also use this method to achieve traceable measurement of actual electrical energy in the event of other incorrect wiring.

[0077] Due to W x and C x These are the energy values ​​of each phase accumulated by the three-phase four-wire smart energy meter itself. The data can be obtained through step 2, and since they are all based on the measurement of the energy meter, the value can be traced back to its source. Therefore, it is possible to realize the energy calculation and replenishment for energy traceability.

[0078] Furthermore, step 5 specifically includes:

[0079] Display the correctly calculated battery level and the supplementary battery level;

[0080] The aforementioned replenishment power display can be shown or printed on a PC or other device via communication methods for easy viewing; or it can be displayed on the device itself.

[0081] Compared with the prior art, the beneficial effects of this invention are: a method for calculating the correct amount of electricity and supplementing the amount of electricity by means of incorrect wiring type. This method can automatically obtain the original data of the electricity meter to calculate the correct amount of electricity and supplement it. Attached Figure Description

[0082] Figure 1 This is a vector diagram of the electrical energy compensation algorithm in this invention. Detailed Implementation

[0083] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding the present invention, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0084] This invention provides a method for calculating the source of electricity in a three-phase four-wire smart meter under incorrect wiring conditions. The calculation method specifically includes the following steps:

[0085] S1: Data Acquisition: Obtain raw data for a certain period of time from the three-phase electricity meter by reading the meter or viewing the data on the electricity meter display screen.

[0086] S2: Pressure-current angle calculation: The phase angle is calculated and supplemented by collecting electrical parameter information, and its phase diagram is drawn; the wiring analysis of the energy meter can be realized, providing a basis for the accurate measurement of energy meter error.

[0087] S3: Error Wiring Type Judgment: Analyze the wiring result of the energy meter by collecting electrical parameter information and calculating the voltage-current phase angle, or obtain the wiring result of the energy meter after judging by measuring tools; analyze the error wiring type of the energy meter.

[0088] S4: Measuring accurate electricity consumption: Utilizing the voltage-current angle data and phase diagram, and combined with the incorrect wiring type of the electricity meter, this patented calculation method uses various types of electricity data recorded by a three-phase four-wire smart electricity meter within a metering cycle to achieve traceable metering and replenishment of electrical energy.

[0089] S5: Output Results: Displays the correctly calculated battery level and the supplemented battery level.

[0090] Specifically, S1 is:

[0091] Real-time electricity consumption data of three-phase energy meters can be collected via carrier communication or RS485 communication using the DL / T645 or DL / T698.45 protocol. Alternatively, electricity consumption data for a specific time period can be obtained by viewing and recording the data displayed on the energy meter. The electricity consumption data includes, but is not limited to, the three-phase voltage, three-phase current, the angle between each phase voltage, the angle between each phase voltage and current, the positive active energy of each phase, the negative active energy of each phase, the reactive energy in the first quadrant of each phase, the reactive energy in the second quadrant of each phase, the reactive energy in the third quadrant of each phase, and the reactive energy in the fourth quadrant of each phase.

[0092] Specifically, S2 is:

[0093] The data obtained from S1 is shown in the table below, along with phase angle calculation formulas 1 and 2, which can be used to calculate the phase relationship between any phase voltage and current.

[0094]

[0095]

[0096] ∠U1U2=∠U1U3-∠U2U3 Formula 1;

[0097] ∠I1I2=∠U1U2=∠U1I1-∠U2I2 Formula 2;

[0098] =∠I1U2+∠U2I2

[0099] =∠I1I2

[0100] Using the phase relationship calculated by S2, a phase vector diagram of a three-phase four-wire energy meter can be drawn. Let's analyze this using a specific load with an electrical load of 1.0 as an example.

[0101] Specifically, S3 involves using a professional on-site verification instrument to determine incorrect wiring of the three-phase lines; or analyzing the wiring diagram of a three-phase four-wire smart energy meter based on the phase relationship calculated in S2.

[0102] Let's take a specific load with an electrical load of 1.0 as an example for analysis:

[0103] 1) Voltage phase sequence analysis:

[0104] Since the phase angle of each phase voltage in a three-phase four-wire system differs by approximately 120°, even when the power supply load is unstable, the phase difference will not deviate significantly. Only in the case of incorrect wiring will the phase angle of each phase voltage differ greatly. Therefore, the wiring phase sequence of the energy meter voltage can be analyzed based on the phase relationship between voltages.

[0105] When ∠U1U2 or ∠U2U3 are both around 120°, or ∠U1U3 is around 240°, if two or more of these conditions are met, the voltage connection result can be confirmed as a positive phase sequence, and the voltage connection order is A, B, C. If only one of these conditions has the same angle, and the other two conditions have different angles, the voltage connection result can also be confirmed as a positive phase sequence. However, the phases of the common components of these two conditions are reversed. For example, if ∠U1U2 is 120°, ∠U1U3 is 60°, and ∠U2U3 is 300°, then the common components of ∠U1U3 and ∠U2U3 are reversed, and the voltage connection order is A, B, -C.

[0106] Similarly, when ∠U1U2 or ∠U2U3 are both around 240°, or ∠U1U3 is around 120°, if two or more of these conditions are met, the voltage connection result can be confirmed as reverse phase sequence, and the voltage connection order is A, C, B. If only one of these conditions has the same angle, and the other two conditions have different angles, the voltage connection result can also be confirmed as positive phase sequence. However, the phases of the common components of these two conditions are reversed. For example, if ∠U1U2 is 240°, ∠U1U3 is 300°, and ∠U2U3 is 60°, then the common components of ∠U1U3 and ∠U2U3 are reversed, and the voltage connection order is A, C, B.

[0107] 2) Current phase sequence analysis:

[0108] The current phase sequence analysis method is the same as the voltage phase sequence analysis method, only the analysis angle is different. The current phase sequence analysis is the phase angle between the three phase currents (i.e., ∠I1I2, ∠I2I3, ∠I1I3) to determine the connection phase sequence of the three phase currents.

[0109] 3) Error Wiring Analysis:

[0110] Taking a voltage positive phase sequence (i.e., A, B, C) and a current positive phase sequence (i.e., A, B, C) as an example, and analyzing the voltage-current angle of one of the components, there are the following six cases:

[0111] (1) When the angle between voltage and current is around 0°, the current follows the voltage phase sequence, that is: the voltage phase sequence is A, B, C; the current phase sequence is A, B, C.

[0112] (2) When the voltage leads the current by about 180°, the current phase sequence is reversed and then follows the voltage phase sequence, that is: the voltage phase sequence is A, B, C; the current phase sequence is -A, -B, -C.

[0113] (3) When the voltage leads the current by about 120°, the current phase sequence shifts forward by 1 position to follow the voltage phase sequence, that is: the voltage phase sequence is A, B, C; the current phase sequence is B, C, A.

[0114] (4) When the voltage leads the current by about 300° (or the voltage lags the current by 60°), the current phase sequence is shifted forward by 1 position and inverted, and then follows the voltage phase sequence. That is, the voltage phase sequence is A, B, C; the current phase sequence is -B, -C, -A.

[0115] (5) When the voltage lags the current by about 120°, the current phase sequence shifts back by 1 position to follow the voltage phase sequence, that is: the voltage phase sequence is A, B, C; the current phase sequence is C, A, B.

[0116] (6) When the voltage lags the current by about 300° (or the voltage leads the current by 60°), the current phase sequence is shifted back by 1 position and inverted, and then follows the voltage phase sequence. That is, the voltage phase sequence is A, B, C; the current phase sequence is -C, -A, -B.

[0117] Specifically, S4 is:

[0118] S2 can be used to calculate any voltage, current, and the phase angle between voltage and current. Here, we take the voltage connection A, B, C and the current connection B, A, C as an example to analyze the energy recovery algorithm. Its vector diagram is shown below. Figure 1 .

[0119] The correct method for calculating active electrical energy and active power.

[0120] W a =P a ·T=U a I a cosα·T (Formula 3)

[0121] W b =P b ·T=U b I b cosβ·T formula 4;

[0122] W c =P c ·T=U c I c cosγ·T formula 5;

[0123]

[0124] The active energy and active power calculated by a three-phase four-wire smart energy meter.

[0125] W1=P1·T=U1I1cosθ·T Formula 7;

[0126] W1=P1·T=U1I1cosθ·T Formula 7;

[0127] W2=P2·T=U2I2cosδ·T Formula 8;

[0128] W3=P3·T=U3I3cosγ·T Formula 9;

[0129] W h =W1+W2+W3=(P1+P2+P3)·T Formula 10;

[0130] Formula explanation:

[0131] W a W b W c This corresponds to the active electrical energy supplied by the three phases of power supply lines A, B, and C.

[0132] P a P b P c This corresponds to the active power of the three-phase power supply in power lines A, B, and C;

[0133] W1, W2, W3: These correspond to the active energy measured by the first, second, and third elements of the electricity meter.

[0134] P1, P2, P3: These correspond to the active power measured by the first, second, and third elements of the electricity meter.

[0135] Since the three-phase voltage in a three-phase four-wire power supply line is approximately 220V, it can be assumed to be:

[0136] U a =U b =U c =U (that is: U1 = U2 = U3 = U); and the angle between the three phase voltages is 120°, so the angle ω between the voltages can also be regarded as 120°.

[0137] The correct active power derivation algorithm for phase A is shown in Formula 11 below;

[0138]

[0139] Since I2 is in its third quadrant relative to U2, P2 is the reverse-phase active power, which is negative; Q2 is the reactive power in the third quadrant, which is also negative.

[0140] Therefore, formula 11 can be optimized as follows:

[0141] Similarly, the correct active power derivation algorithm for phase B is shown in Formula 13 below;

[0142]

[0143] Since I1 is in its second quadrant relative to U1, P1 is the active power in reverse phase, which is negative; while Q1 is the reactive power in the second quadrant, which is positive.

[0144] Therefore, formula 13 can be optimized as follows:

[0145] There is no incorrect wiring in phase C, therefore: P c =U c I c cosγ=U3I3cosγ=P3 Formula 15;

[0146] According to formulas 3 to 10, the accumulation of active and reactive energy is the accumulation of active and reactive power over a certain period of time. Therefore, the correct calculation and replenishment of electrical energy is the correct calculation and replenishment of active power.

[0147] Substituting formulas 12, 14, and 15 into formula 6, we can calculate the actual electrical energy of the power supply line as follows:

[0148]

[0149] illustrate:

[0150] W x The sum of the positive and negative active power of a certain component;

[0151] C x The total reactive power of a component across its four quadrants.

[0152] Similarly, three-phase four-wire smart energy meters can also use this method to achieve traceable measurement of actual electrical energy even in cases of other incorrect wiring.

[0153] Because of W in Formula 16 x and c xThe energy values ​​of each phase are accumulated by the three-phase four-wire smart energy meter itself. The data can be obtained through S2 described in this invention, and the values ​​can be traced back to the meter. Therefore, the method of this invention can realize the energy calculation and replenishment for energy traceability.

[0154] Specifically, S5 is:

[0155] Display the correctly calculated battery level and the supplementary battery level;

[0156] The aforementioned replenishment power display can be shown or printed on a PC or other device via communication methods for easy viewing; or it can be displayed on the device itself.

[0157] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A method for calculating the source of electrical energy under incorrect wiring of a three-phase four-wire smart meter, characterized in that: The calculation method specifically includes the following steps: Step 1, Data Acquisition: Obtain various electrical parameters and the power consumption data of each active and reactive energy from the three-phase electricity meter by reading the meter or viewing the data on the electricity meter display screen. Step 2, Calculation of the pressure-flow angle: The phase angle is calculated and supplemented by collecting electrical parameter information; Step 3, Error Wiring Type Judgment: The wiring result of the energy meter is analyzed by collecting electrical parameter information and calculating the voltage-current phase angle, or the wiring result of the energy meter is obtained after judgment by measuring tools; Step 4: Measure the correct electricity consumption: Combine the incorrect connection of the electricity meter with the collected electricity data to complete the traceable calculation of the actual electricity consumption, specifically as follows: By utilizing the pressure-current angle data and phase diagram, and combining the incorrect wiring type of the energy meter, the various types of energy data recorded by the three-phase four-wire smart energy meter within a metering cycle are used to complete the traceable energy calculation and supplement through mathematical calculation methods. The energy recovery algorithm is obtained by calculating arbitrary voltage, current, and phase angle between voltage and current in step 2. When the voltage connection is A, B, C and the current connection is B, A, C, the energy recovery algorithm is as follows: The correct method for calculating active energy and active power is as follows: ， Active energy and active power calculated by a three-phase four-wire smart energy meter; ， in: , , This corresponds to the active electrical energy supplied by the three phases of power supply lines A, B, and C. , , This corresponds to the active power of the three-phase power supply in power lines A, B, and C. , , This corresponds to the active electrical energy measured by the first, second, and third elements of the electricity meter; , , This corresponds to the active power measured by the first, second, and third elements of the electricity meter; Since the three-phase voltage in a three-phase four-wire power supply line is approximately 220V, it can be assumed to be: ,Right now Furthermore, the angles between the three-phase voltages are 120°, which also allows us to measure the angles between the voltages. Viewed as 120°; The correct algorithm for deriving the active power of phase A is as follows: ， because relatively In its three quadrants, therefore This represents the reverse-phase active power, which is a negative value. It represents no reactive power in the three quadrants and is also a negative value; Therefore, the above formula can be optimized as follows: , Similarly, the correct algorithm for deriving the active power of phase B is as follows: ， because relatively In its second quadrant, therefore This represents the reverse-phase active power, which is a negative value; while The second quadrant is inactive, which is a positive value; Therefore, the above formula can be optimized as follows: , There is no incorrect wiring in phase C, therefore: , The accumulation of active and reactive energy is the accumulation of active and reactive power over a certain period of time. Therefore, the correct calculation and replenishment of electrical energy is the correct calculation and replenishment of active power. The actual electrical energy of the power supply line can be further calculated as follows: ， in: The sum of the positive and negative active power of a certain component; The total reactive power of a component across its four quadrants; Similarly, three-phase four-wire smart energy meters can also use this method to achieve traceable measurement of actual electrical energy in the event of other incorrect wiring. because and These are all the energy values ​​of each phase accumulated by the three-phase four-wire smart energy meter itself. The data can be obtained through step 2, and they are all traceable to the source of the energy value by following the measurement of the energy meter. Therefore, it is possible to realize the energy calculation and replenishment for energy traceability. Step 5, Output Results: Display the correctly calculated battery level and the supplemented battery level.

2. The method for calculating the source of electricity under incorrect wiring of a three-phase four-wire smart meter according to claim 1, characterized in that: Step 1 specifically involves: Real-time electricity consumption data of three-phase electricity meters can be collected through carrier communication or RS485 communication using DL / T645 or DL / T698.45 protocols. Alternatively, electricity consumption data for a certain period of time can be obtained by viewing and recording the data displayed on the electricity meter. The electrical parameter information includes the three-phase voltage, three-phase current, angle between each phase voltage, and angle between each phase voltage and current of the smart energy meter during the time period. The active and reactive power consumption data include the cumulative energy data of each phase's positive active power, each phase's negative active power, each phase's first quadrant reactive power, each phase's second quadrant reactive power, each phase's third quadrant reactive power, and each phase's fourth quadrant reactive power accumulated and recorded by the smart energy meter within a certain period.

3. The method for calculating the source of electricity under incorrect wiring of a three-phase four-wire smart meter according to claim 1, characterized in that: Step 2 specifically involves: The obtained electrical parameter information is used to supplement the calculation of the phase angle between other related phase voltages and currents, which is used for the wiring analysis of the energy meter. The phase angle calculation formula is: ， in: The voltage angle between element 1 and element 2; The voltage angle between element 1 and element 3; The voltage angle between element 2 and element 3; The angle between the voltage and current of a single element; The angle between the voltage and current of the two components; The current angle between element 1 and element 2.

4. The method for calculating the source of electricity under incorrect wiring of a three-phase four-wire smart meter according to claim 1, characterized in that: Step 3 specifically involves: The wiring errors of the three-phase line can be judged by a professional on-site calibration instrument; the wiring diagram of the three-phase four-wire smart energy meter can also be analyzed by the phase relationship calculated in step 2. 1) Voltage phase sequence analysis: Since the phase angle of each phase voltage in a three-phase four-wire system differs by approximately 120°, even when the power supply load is unstable, the phase difference is not significant. Only in the case of incorrect wiring will the phase angle of each phase voltage differ significantly. Therefore, the wiring phase sequence of the energy meter voltage can be analyzed based on the phase relationship between voltages. when or When both are around 120°, or When the angle is around 240°, if two or more conditions are met, the voltage connection can be confirmed as a positive phase sequence, and the voltage connection order is A, B, C. If only one condition has the same angle as the above conditions, and the angles of the other two conditions are different, the voltage connection can also be confirmed as a positive phase sequence, but the phases of the two common components are reversed. For example: It is 120°. It is 60°. It can be determined at 300°. and The common three components are connected in reverse voltage, that is: the voltage connection sequence is A, B, -C; Similarly, when or When both are around 240°, or When the angle is around 120°, if two or more conditions are met, the voltage connection can be confirmed as reverse phase sequence, and the voltage connection order is A, C, B. If only one condition has the same angle as the above conditions, and the angles of the other two conditions are different, the voltage connection can also be confirmed as positive phase sequence. However, the phases of the two common components are reversed. For example: It is 240°. It is 300°. It can be determined at 60°. and The common three components are connected in reverse voltage, that is: the voltage connection sequence is A, -C, B; 2) Current phase sequence analysis: Current phase sequence analysis and voltage phase sequence analysis follow the same method, only the perspective differs. Current phase sequence analysis focuses on the phase angles between the three-phase currents. , , Determine the phase sequence of the three-phase current connection; 3) Error Wiring Analysis: Taking a positive voltage phase sequence (A, B, C) and a positive current phase sequence (A, B, C) as an example, and analyzing the voltage-current angle of one of the components, there are six possible cases: (1) When the angle between voltage and current is around 0°, the current follows the voltage phase sequence, that is: the voltage phase sequence is A, B, C; the current phase sequence is A, B, C. (2) When the voltage leads the current by about 180°, the current phase sequence is reversed and then follows the voltage phase sequence, that is: the voltage phase sequence is A, B, C; the current phase sequence is -A, -B, -C. (3) When the voltage leads the current by about 120°, the current phase sequence shifts forward by 1 position to follow the voltage phase sequence, that is: the voltage phase sequence is A, B, C; the current phase sequence is B, C, A; (4) When the voltage leads the current by about 300°, the current phase sequence is shifted forward by 1 position and inverted, and then follows the voltage phase sequence. That is, the voltage phase sequence is A, B, C; the current phase sequence is -B, -C, -A. (5) When the voltage lags the current by about 120°, the current phase sequence shifts one position to follow the voltage phase sequence, that is: the voltage phase sequence is A, B, C; the current phase sequence is C, A, B; (6) When the voltage lags the current by about 300°, the current phase sequence is shifted back by 1 position and inverted, and then follows the voltage phase sequence. That is, the voltage phase sequence is A, B, C; the current phase sequence is -C, -A, -B.

5. The method for calculating the source of electricity under incorrect wiring of a three-phase four-wire smart meter according to claim 1, characterized in that: Step 5 specifically involves: Display the correctly calculated battery level and the supplementary battery level; The aforementioned replenishment power display can be shown or printed on a PC or other device via communication methods for easy viewing; or it can be displayed on the device itself.

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