A method and system for real-time monitoring of incorrect wiring modes of three-phase smart meters

Abstract

The present invention provides a method and system for real-time monitoring of incorrect wiring modes of three-phase smart meters, belonging to the field of electric power measurement technology. The technical scheme is: a method for real-time monitoring of incorrect wiring modes of three-phase smart meters, including data collection, obtaining the power consumption data of each three-phase smart meter; wiring analysis, combining the power consumption data, analyzing and judging whether the wiring of the three-phase smart meter is correct; compensatory power calculation, calculating the power correction coefficient, and determining the compensatory power; result output, sending the judgment result and corresponding number of each three-phase smart meter to the concentrator, and the concentrator summarizes the incorrect wiring modes and compensatory power information of all three-phase smart meters and uploads them to the power consumption information collection main station. The beneficial effects of the present invention are: it can identify the incorrect wiring modes of three-phase smart meters, and compensatory power, solving the problems of untimely and low efficiency of manual processing; based on the distributed design of the existing power collection system, it reduces the data processing pressure of the main station.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power measurement, and in particular to a method for real-time monitoring of incorrect wiring of a three-phase smart electric meter and for catching up on the amount of electricity. Background Art

[0002] At present, the electric energy meter is a device used to measure the amount of electricity used by users. It is the reference standard for power supply companies to collect electricity charges. However, the meter often operates abnormally due to new installations, rotations, line equipment maintenance, etc., especially the high-voltage and high-supply electric energy meters introduced by mutual inductors, which have complicated wiring. If wiring errors and other abnormal conditions occur, the actual electricity consumption will be inconsistent with the measured electricity consumption, which will inevitably affect the power department and users. In order to truly and accurately measure electric energy, it is necessary not only to ensure the accuracy of the electric energy meter itself, but more importantly, to ensure the correct wiring of the electric energy meter, and to discover and correct it in time.

[0003] There are many kinds of incorrect wiring of three-phase smart meters. The present invention is aimed at the situation where the wiring of the secondary circuit and the AC sampling device is complete (meaning there is no phase loss), but the connection position is wrong during connection, and most of these incorrect wiring will cause energy metering losses. At the same time, the traditional wiring inspection method, such as using a phase volt-ampere meter or a phase sequence meter to check whether the wiring of the energy meter is correct, requires the operator to measure and verify on-site, and should have a high level of theoretical knowledge and field experience to correctly judge the wiring situation of the energy meter. Although the staff can perform wiring inspections on the energy meter and realize the catch-up of electricity, the wiring inspection is only the wiring inspection for this time. If there are any changes, they have to go to the site for inspection again, which is time-consuming and labor-intensive. In addition, the catch-up of electricity is only the catch-up coefficient at a certain point in time, and the calculated catch-up electricity is only an approximate data, which cannot be regarded as a real catch-up electricity value. Summary of the invention

[0004] In view of the above-mentioned problems in the prior art, the purpose of the present invention is to provide a method for real-time monitoring of incorrect wiring and compensatory electricity of three-phase smart meters. A distributed HPLC module is applied to use real-time measured voltage, current and other electricity consumption data to perform phase angle analysis to determine the wiring method and calculate the compensatory electricity, so that the power supply department can obtain information in time and quickly handle the fault, replacing manual on-site verification.

[0005] The present invention is implemented through the following technical solution: a method for real-time monitoring of incorrect wiring modes of a three-phase smart meter, comprising the following steps:

[0006] S1: Data collection, obtaining the power consumption data of each three-phase smart meter; the existing power collection system mostly adopts a distributed system, each three-phase smart meter corresponds to a number, and the power consumption data of each three-phase smart meter can be obtained in real time based on the distributed collection system;

[0007] S2: Wiring analysis, combining the power consumption data, calculating the phase angle of each phase of each three-phase smart meter, and judging whether the wiring of the three-phase smart meter is correct. If the wiring is wrong, recording the wrong wiring mode and wrong wiring duration, and calculating the amount of electricity to be compensated;

[0008] S3: Calculation of the amount of electricity to be compensated: the power ratio corresponding to the correct wiring mode and the incorrect wiring mode is used as the electricity correction coefficient, and the amount of electricity measured by the three-phase smart meter during the duration of the incorrect wiring is combined to determine the amount of electricity to be compensated;

[0009] S4: Result output: sending the corresponding number of the three-phase smart meter, the result of the wiring analysis, and the amount of supplementary electricity to the concentrator;

[0010] S5: Data aggregation: the concentrator aggregates the wrong wiring modes and the supplementary power information of all three-phase smart meters in the substation area and uploads them to the power consumption information collection main station in real time.

[0011] Steps S1-S4 are all completed on the three-phase smart meter side. Based on the distributed data collection system, timely judgment of the incorrect wiring mode of the three-phase smart meter and accurate calculation of the replenishment power can be achieved; step S5 is to complete the information aggregation based on the existing data collection system.

[0012] Furthermore, S1 specifically performs high-frequency real-time data collection on three-phase smart meters based on power line high-speed carrier technology, and saves various types of electricity consumption data at specified time intervals. The electricity consumption data includes phase voltage, phase current, power factor, active power and reactive power corresponding to the three phases respectively.

[0013] High-speed power line carrier technology (HPLC) refers to a communication network that uses low-voltage power lines as communication media to realize the aggregation, transmission and interaction of electricity consumption information of low-voltage power users. It is a high-speed power line carrier communication network. Through distributed HPLC modules, three-phase smart meters can be used for minute-level data collection, which can realize real-time monitoring of residential power load and in-depth mining of electricity consumption data, so as to better implement demand-side management for residents and enterprises.

[0014] Furthermore, for three-phase four-wire wiring, when three currents are connected, there will be two types of wiring methods for the direction of the currents, one is the reverse connection of each phase current, and the other is the swapping of the wiring positions of each phase current; when three voltages are connected, there will be two types of wiring methods for the direction of the voltages, one is the positive phase sequence (ABC, BCA, CAB), and each of the three voltages lags behind the previous voltage by 120 degrees, and the other is the reverse phase sequence (ACB, BAC, CBA), and each of the three voltages lags behind the previous voltage by 240 degrees. There is only one correct wiring method under the two combinations, that is, the current is connected in the positive phase sequence of ABC, and the voltage is connected in the positive phase sequence of ABC. Figure 2 This is the phasor diagram of a three-phase four-wire electric energy meter when it is correctly wired.

[0015] The S2 is specifically:

[0016] S21: Determine the reference voltage coordinate system: obtain the phase sequence status word, determine the voltage positive phase sequence or the voltage reverse phase sequence, if it is a positive phase sequence, the voltage reference reference is Ua, Ub, Uc, if it is a reverse phase sequence, the voltage reference reference is Ua, Uc, Ub;

[0017] S22: Calculate the phase angle of each phase voltage and current: determine the positive and negative of active power P and reactive power Q, and the power factor Calculate the arc cosine value to obtain the phase angle of each phase voltage and current; take the arc cosine value of the power factor to obtain the phase angle of the voltage and current, and uniquely determine the angle of the phase angle based on the positive and negative energy of the active power and reactive power, and then perform the angle conversion, as shown in the following formula:

[0018] ; ; ;

[0019] S23, determining the wiring mode of the three-phase smart meter according to the phase angle range;

[0020] S24, if the wiring is wrong, record the wrong wiring mode and wrong wiring duration.

[0021] Further, the S23 is specifically:

[0022] S231: Since the wiring mode is unknown, the three currents are tentatively assumed to be I1, I2 and I3. Through steps S21 and S22, the phase angle relationship of each phase current relative to the corresponding phase voltage phasor is obtained, which is recorded as ∠UaI1, ∠UbI2 and ∠UcI3. The angles correspond to , , ;

[0023] S232: According to , , Calculate the angles between I1 and I2, I2 and I3, and I3 and I1 as follows: ∠I1I2= ,∠I2I3= ,∠I3I1= ;

[0024] S233: Determine the current direction: When the wiring is correct, the three current vectors are symmetrical, and the phase difference of the three current vectors is 120° respectively; the specific determination is as follows:

[0025] Case 1: If ∠I1I2=120°, ∠I2I3=120°, ∠I3I1=120°, and it is a positive phase sequence, then the three-phase wiring is correct;

[0026] Case 2: If ∠I1I2<120°, ∠I2I3=120°, ∠I3I1<120°, and it is a positive phase sequence, then I1 is connected inversely or I2 and I3 are connected inversely; adjust the direction of I1, that is , determine whether the three current vectors are symmetrical after the direction of I1 changes; if they are symmetrical and , , Less than 45°, it means I1 is reversed, recorded as -I1; if it is asymmetric or , , If it is greater than 45°, the direction of I1 will not be changed, and the directions of I2 and I3 will be adjusted at the same time, that is, , , and the conversion is within [0, 2π], then determine whether the three current directions after adjusting I2 and I3 are symmetrical. If they are symmetrical and , , If it is less than 45°, it means I2 and I3 are reversely connected, which is recorded as -I2 and -I3;

[0027] Case 3: If ∠I1I2=120°, ∠I2I3<120°, ∠I3I1<120°, and it is a positive phase sequence, then I3 is connected in reverse or I1 and I2 are connected in reverse. According to the judgment method of case 2, the wiring method can be obtained by reasoning; except for the correct three-phase current wiring angle difference and phase difference, other cases are judged according to the above cases;

[0028] S234: Re-phase the three currents I1, I2 and I3 after determining their directions: , , Convert it into an angle in the range of [0, 2π], and convert it into , , The corresponding currents are recorded as Ia, Ib, and Ic in the clockwise direction, and then the corresponding relationship and signs of Ia, Ib, and Ic are converted in the order of I1, I2, and I3. At this time, the incorrect wiring method is determined.

[0029] Further, the S3 is specifically:

[0030] S31: Calculate the power when the wiring is wrong and record it as P (error), P (error) = PA + PB + PC = UaIacosφ A +UbIbcosφ B +UcIccosφ C；

[0031] S32: Calculate the power P (positive) when the wiring is correct, P (positive) = 3UxIcosφ; where P (positive) is the active power corresponding to P (wrong) after adjustment, and the power factor cosφ used to calculate P (positive) can be calculated through phasor diagram analysis.

[0032] S33: Calculate the correction coefficient K X =P(correct) / P(wrong);

[0033] S34: Calculate the replenishment power ∆A=(K X -1)*A(error), where A(error) is the amount of electricity measured in the three-phase smart meter during the duration of the wrong wiring.

[0034] A system for real-time monitoring of incorrect wiring modes of a three-phase smart meter, comprising:

[0035] A data acquisition module, which is based on high-speed power line carrier technology (HPLC), uses the HPLC module to perform high-frequency real-time data acquisition and storage on the three-phase smart meter, and saves various types of power consumption data at specified time intervals. The power consumption data includes phase voltage, phase current, power factor, active power and reactive power corresponding to the three phases respectively;

[0036] The wiring analysis module calculates the phase angle of each phase of each three-phase smart meter in combination with the power consumption data, and determines whether the wiring of the three-phase smart meter is correct. If the wiring is wrong, the wrong wiring mode and the duration of the wrong wiring are recorded, and the replenishment power is calculated and stored;

[0037] The compensatory power calculation module uses the power ratio corresponding to the correct wiring mode and the incorrect wiring mode as the power correction coefficient, and combines the power measured by the three-phase smart meter during the duration of the incorrect wiring to determine the compensatory power;

[0038] The result output module sends the corresponding number of the three-phase smart meter, the result of the wiring analysis, and the amount of supplementary electricity to the concentrator;

[0039] Data aggregation: the concentrator aggregates the wrong wiring mode and the supplementary power information of all three-phase smart meters in the substation area and uploads it to the power consumption information collection main station in real time.

[0040] Furthermore, the result output module specifically attaches the judgment result of each three-phase smart meter, the corresponding number of the three-phase smart meter, the result of the wiring analysis, and the compensatory electricity quantity to the HPLC protocol in the form of a data message based on the HPLC module and sends it to the concentrator. The concentrator summarizes the wrong wiring methods and compensatory electricity quantity information of all three-phase smart meters in the substation and uploads it to the electricity consumption information collection main station in real time.

[0041] Further, the working steps of the wiring analysis module include:

[0042] S21: Determine the reference voltage coordinate system: obtain the phase sequence status word, determine the voltage positive phase sequence or the voltage reverse phase sequence, if it is a positive phase sequence, the voltage reference reference is Ua, Ub, Uc, if it is a reverse phase sequence, the voltage reference reference is Ua, Uc, Ub;

[0043] S22: Calculate the phase angle of each phase voltage and current: determine the positive and negative of active power P and reactive power Q, and the power factor Calculate the arc cosine value to obtain the phase angle of each phase voltage and current;

[0044] S23: judging the wiring mode of the three-phase smart meter according to the phase angle range;

[0045] S24: If the wiring is wrong, the wrong wiring method and the wrong wiring duration are recorded.

[0046] Further, the S23 is specifically:

[0047] S231: Since the wiring mode is unknown, the three currents are tentatively assumed to be I1, I2 and I3. Through steps S21 and S22, the phase angle relationship of each phase current relative to the corresponding phase voltage phasor is obtained, which is recorded as ∠UaI1, ∠UbI2 and ∠UcI3. The angles correspond to , , ;

[0048] S232: According to , , Calculate the angles between I1 and I2, I2 and I3, and I3 and I1 as follows: ∠I1I2= ,∠I2I3= ,∠I3I1= ;

[0049] S233: Determine the current direction: When the wiring is correct, the three current vectors are symmetrical, and the phase difference of the three current vectors is 120° respectively; the specific determination is as follows:

[0050] Case 1: If ∠I1I2=120°, ∠I2I3=120°, ∠I3I1=120°, and it is a positive phase sequence, then the three-phase wiring is correct;

[0051] Case 2: If ∠I1I2<120°, ∠I2I3=120°, ∠I3I1<120°, and it is a positive phase sequence, then I1 is connected inversely or I2 and I3 are connected inversely; adjust the direction of I1, that is , determine whether the three current vectors are symmetrical after the direction of I1 changes; if they are symmetrical and , , Less than 45°, it means I1 is reversed, recorded as -I1; if it is asymmetric or , , If it is greater than 45°, the direction of I1 will not be changed, and the directions of I2 and I3 will be adjusted at the same time, that is, , , and the conversion is within [0, 2π], then determine whether the three current directions after adjusting I2 and I3 are symmetrical. If they are symmetrical and , , If it is less than 45°, it means I2 and I3 are reversely connected, which is recorded as -I2 and -I3;

[0052] Case 3: If ∠I1I2=120°, ∠I2I3<120°, ∠I3I1<120°, and it is a positive phase sequence, then I3 is connected in reverse or I1 and I2 are connected in reverse. According to the judgment method of case 2, the wiring method can be obtained by reasoning; except for the correct three-phase current wiring angle difference and phase difference, other cases are judged according to the above cases;

[0053] S234: Re-phase the three currents I1, I2 and I3 after determining their directions: , , Convert it into an angle in the range of [0, 2π], and convert it into , , The corresponding currents are recorded as Ia, Ib, and Ic in the clockwise direction, and then the corresponding relationship and signs of Ia, Ib, and Ic are converted in the order of I1, I2, and I3. At this time, the incorrect wiring method is determined.

[0054] Furthermore, the working steps of the supplementary power calculation module include:

[0055] S31: Calculate the power when the wiring is wrong and record it as P (error), P (error) = PA + PB + PC = UaIacosφ A +UbIbcosφ B +UcIccosφ C；

[0056] S32: Calculate the power P (positive) when the wiring is correct, P (positive) = 3UxIcosφ;

[0057] S33: Calculate the correction coefficient K X =P(correct) / P(wrong);

[0058] S34: Calculate the replenishment power ∆A=(K X -1)*A(error), where A(error) is the amount of electricity measured in the three-phase smart meter during the duration of the wrong wiring.

[0059] The beneficial effects of the present invention are as follows: a method and system for real-time monitoring of the miswiring mode of a three-phase smart meter provided by the present invention, relying on the HPLC communication network, can not only realize real-time detection and intelligent analysis of wiring anomalies of the metering device, but also can realize automatic electricity replenishment for the corresponding miswiring type, solving the problems of heavy workload and untimely processing in calculating the electricity replenishment; the present invention adopts distributed computing with HPLC module as the medium, avoiding the network congestion and time delay caused by the traditional method of aggregating data collection to the main station for diagnosis, accelerating the computing and processing speed, and improving the efficiency of maintenance personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] Figure 1 The present invention provides a flow chart of the method.

[0061] Figure 2 This is the correct wiring phasor diagram for the three-phase four-wire system.

[0062] Figure 3 The system framework of the present invention Figure 1 .

[0063] Figure 4 The system framework of the present invention Figure 2 . DETAILED DESCRIPTION

[0064] In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.

[0065] Embodiment 1, as Figure 1 As shown, the present invention is implemented by the following technical solution: a method for real-time monitoring of incorrect wiring modes of a three-phase smart meter, comprising the following steps:

[0066] S1: Data collection, based on high-speed power line carrier technology (HPLC), high-frequency real-time data collection is performed on three-phase smart meters, and various types of power consumption data are saved at specified time intervals. The power consumption data includes phase voltage, phase current, power factor, active power and reactive power corresponding to the three phases respectively; high-speed power line carrier technology (HPLC) refers to the communication network that uses low-voltage power lines as communication media to realize the aggregation, transmission and interaction of power consumption information of low-voltage power users as high-speed power line carrier communication network. Through distributed HPLC modules, three-phase smart meters can be collected at the minute level, which can realize real-time monitoring of residential power load and in-depth mining of power consumption data, so as to better implement demand-side management for residents and enterprises;

[0067] S2: Wiring analysis, combining the power consumption data, calculating the phase angle of each phase of each three-phase smart meter, and judging whether the wiring of the three-phase smart meter is correct. If the wiring is wrong, recording the wrong wiring mode and wrong wiring duration, and calculating the amount of electricity to be compensated;

[0068] When three currents are connected to the three-phase four-wire system, there are two types of wiring methods for the current direction, one is that the currents of each phase are connected in reverse, and the other is that the wiring positions of the currents of each phase are interchanged; when three voltages are connected, there are two types of wiring methods for the voltage direction, one is the positive phase sequence (ABC, BCA, CAB), and each of the three voltages lags behind the previous voltage by 120 degrees, and the other is the reverse phase sequence (ACB, BAC, CBA), and each of the three voltages lags behind the previous voltage by 240 degrees. There is only one correct wiring method under the two combinations, that is, the current is connected in the positive phase sequence of ABC, and the voltage is connected in the positive phase sequence of ABC. Figure 2 The phasor diagram for the three-phase four-wire electric energy meter when it is correctly wired;

[0069] Specifically: S21: Determine the reference voltage coordinate system: obtain the phase sequence status word, determine the voltage positive phase sequence or the voltage reverse phase sequence, if it is a positive phase sequence, the voltage reference reference is Ua, Ub, Uc, if it is a reverse phase sequence, the voltage reference reference is Ua, Uc, Ub;

[0070] S22: Calculate the phase angle of each phase voltage and current: determine the positive and negative of active power P and reactive power Q, and the power factor Calculate the arc cosine value to obtain the phase angle of each phase voltage and current; take the arc cosine value of the power factor to obtain the phase angle of the voltage and current, and uniquely determine the angle of the phase angle based on the positive and negative energy of the active power and reactive power, and then perform the angle conversion, as shown in the following formula:

[0071] ; ; ;

[0072] S23, determining the wiring mode of the three-phase smart meter according to the phase angle range;

[0073] S231: Since the wiring mode is unknown, the three currents are tentatively assumed to be I1, I2 and I3. Through steps S21 and S22, the phase angle relationship of each phase current relative to the corresponding phase voltage phasor is obtained, which is recorded as ∠UaI1, ∠UbI2 and ∠UcI3. The angles correspond to , , ;

[0074] S232: According to , , Calculate the angles between I1 and I2, I2 and I3, and I3 and I1 as follows: ∠I1I2= ,∠I2I3= ,∠I3I1= ;

[0075] S233: Determine the current direction: When the wiring is correct, the three current vectors are symmetrical, and the phase difference of the three current vectors is 120° respectively; the specific determination is as follows:

[0076] Case 1: If ∠I1I2=120°, ∠I2I3=120°, ∠I3I1=120°, and it is a positive phase sequence, then the three-phase wiring is correct;

[0077] Case 2: If ∠I1I2<120°, ∠I2I3=120°, ∠I3I1<120°, and it is a positive phase sequence, then I1 is connected inversely or I2 and I3 are connected inversely; adjust the direction of I1, that is , determine whether the three current vectors are symmetrical after the direction of I1 changes; if they are symmetrical and , , Less than 45°, it means I1 is reversed, recorded as -I1; if it is asymmetric or , , If it is greater than 45°, the direction of I1 will not be changed, and the directions of I2 and I3 will be adjusted at the same time, that is, , , and the conversion is within [0, 2π], then determine whether the three current directions after adjusting I2 and I3 are symmetrical. If they are symmetrical and , , If it is less than 45°, it means I2 and I3 are connected in reverse, which is recorded as -I2 and -I3;

[0078] Case 3: If ∠I1I2=120°, ∠I2I3<120°, ∠I3I1<120°, and it is a positive phase sequence, then I3 is connected in reverse or I1 and I2 are connected in reverse. According to the judgment method of case 2, the wiring method can be obtained by reasoning; except for the correct three-phase current wiring angle difference and phase difference, other cases are judged according to the above cases;

[0079] S234: Re-phase the three currents I1, I2 and I3 after determining their directions: , , Convert it into an angle in the range of [0, 2π], and convert it into , , The corresponding current is recorded as Ia, Ib, Ic in clockwise direction, and then the corresponding relationship and sign of Ia, Ib, Ic are converted in the order of I1, I2, I3. At this time, the wrong wiring method is determined;

[0080] S24, if the wiring is wrong, record the wrong wiring mode and wrong wiring duration.

[0081] S3: Calculation of the amount of electricity to be compensated: the power ratio corresponding to the correct wiring mode and the incorrect wiring mode is used as the electricity correction coefficient, and the amount of electricity measured by the three-phase smart meter during the duration of the incorrect wiring is combined to determine the amount of electricity to be compensated;

[0082] Specifically: S31: Calculate the power when the wiring is wrong and record it as P (error), P (error) = PA + PB + PC = UaIacosφ A +UbIbcosφ B +UcIccosφ C；

[0083] S32: Calculate the power P (positive) when the wiring is correct, P (positive) = 3UxIcosφ; where P (positive) is the active power corresponding to P (wrong) after adjustment, and the power factor cosφ used to calculate P (positive) can be calculated through phasor diagram analysis;

[0084] S33: Calculate the correction coefficient K X =P(correct) / P(wrong);

[0085] S34: Calculate the replenishment power ∆A=(K X -1)*A(error), where A(error) is the amount of electricity measured in the three-phase smart meter during the duration of the wrong wiring;

[0086] S4: Result output: Based on the HPLC module, the judgment result of each three-phase smart meter is sent to the concentrator by attaching the corresponding number of the three-phase smart meter, the result of the wiring analysis, and the amount of supplementary electricity to the HPLC protocol in the form of a data message;

[0087] S5: Data aggregation: the concentrator aggregates the wrong wiring modes and the supplementary power information of all three-phase smart meters in the substation area and uploads them to the power consumption information collection main station in real time.

[0088] like Figure 3-4 As shown in the second embodiment, a system for real-time monitoring of incorrect wiring modes of three-phase smart meters includes:

[0089] A data acquisition module, which is based on high-speed power line carrier technology (HPLC), uses the HPLC module to perform high-frequency real-time data acquisition and storage on the three-phase smart meter, and saves various types of power consumption data at specified time intervals. The power consumption data includes phase voltage, phase current, power factor, active power and reactive power corresponding to the three phases respectively;

[0090] The wiring analysis module calculates the phase angle of each phase of each three-phase smart meter in combination with the power consumption data, and determines whether the wiring of the three-phase smart meter is correct. If the wiring is wrong, the wrong wiring mode and the duration of the wrong wiring are recorded, and the amount of power to be compensated is calculated and stored. The specific process of the wiring analysis module adopts the method of steps S21-S24 in the first embodiment;

[0091] The compensatory power calculation module uses the power ratio corresponding to the correct wiring mode and the incorrect wiring mode as the power correction coefficient, and determines the compensatory power in combination with the power measured by the three-phase smart meter during the duration of the incorrect wiring; the specific process of the compensatory power calculation module adopts the method of steps S31-S34 in embodiment 1;

[0092] The result output module, based on the HPLC module, sends the judgment result of each three-phase smart meter, the number corresponding to the three-phase smart meter, the result of the wiring analysis, and the amount of supplementary electricity to the concentrator in the form of a data message attached to the HPLC protocol;

[0093] Data aggregation: the concentrator aggregates the wrong wiring mode and the supplementary power information of all three-phase smart meters in the substation area and uploads it to the power consumption information collection main station in real time.

[0094] Embodiment three, as Figure 3 As shown, the second embodiment is implemented by software and is embedded in the hardware of the distributed HPLC module;

[0095] Embodiment 4, as Figure 4 As shown, the second embodiment is implemented by hardware modules, the data acquisition module acquires the power consumption data by communicating with the HPLC module, and the result output module can communicate with the HPLC module to upload the result data.

[0096] In the description of the invention, the previous detailed description has been described various embodiments of the apparatus and / or process by using block diagrams, flow charts and / or examples. To the extent that such block diagrams, flow charts and / or examples contain one or more functions and / or operations, it will be understood by those skilled in the art that each function and / or operation within such block diagrams, flow charts or examples can be implemented individually and / or collectively by many various hardware, software, firmware or any combination thereof.

[0097] There is little difference between hardware and software implementations of various aspects of the system; the use of hardware or software is typically (but not always, as the choice between hardware and software may become important in certain scenarios) a design choice that represents a tradeoff between cost and efficiency. There are various means (e.g., hardware, software, and / or firmware) by which the processes and / or systems and / or other techniques described herein may be implemented, and the preferred means will vary depending on the scenario in which the processes and / or systems and / or other techniques are deployed. For example, if the implementer determines that speed and accuracy are extremely important, then the implementer may choose a primarily hardware and / or firmware means; if flexibility is extremely important, then the implementer may choose a primarily software implementation; or, but equally alternatively, the implementer may choose some combination of hardware, software, and / or firmware.

[0098] Technical features not described in the present invention can be achieved through or by adopting existing technologies and will not be described in detail here. Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should also fall within the scope of protection of the present invention.

Claims

1. A method for real-time monitoring of incorrect wiring modes of three-phase smart meters, characterized in that: The following steps are involved: S1: Data collection, obtaining the electricity consumption data of each three-phase smart meter; S2: Wiring analysis, combining the power consumption data, calculating the phase angle of each phase of each three-phase smart meter, and judging whether the wiring of the three-phase smart meter is correct. If the wiring is wrong, recording the wrong wiring mode and wrong wiring duration, and calculating the amount of electricity to be compensated; S3: Calculation of the amount of electricity to be compensated: the power ratio corresponding to the correct wiring mode and the incorrect wiring mode is used as the electricity correction coefficient, and the amount of electricity measured by the three-phase smart meter during the duration of the incorrect wiring is combined to determine the amount of electricity to be compensated; S4: Result output: sending the corresponding number of the three-phase smart meter, the result of the wiring analysis, and the amount of supplementary electricity to the concentrator; S5: Data aggregation: the concentrator aggregates the wrong wiring modes and the supplementary power information of all three-phase smart meters in the substation area and uploads them to the power consumption information collection master station in real time; Specifically, S1 performs high-frequency real-time data collection on the three-phase smart meter based on the power line high-speed carrier technology, and saves various types of power consumption data at prescribed time intervals. The power consumption data includes phase voltage, phase current, power factor, active power and reactive power corresponding to the three phases respectively; The S2 is specifically: S21: Determine the reference voltage coordinate system: obtain the phase sequence status word, determine the voltage positive phase sequence or the voltage reverse phase sequence, if it is a positive phase sequence, the voltage reference reference is Ua, Ub, Uc, if it is a reverse phase sequence, the voltage reference reference is Ua, Uc, Ub; S22: Calculate the phase angle of each phase voltage and current: determine the positive and negative of active power P and reactive power Q, and the power factor Calculate the arc cosine value to obtain the phase angle of each phase voltage and current; S23: Determine the wiring mode of the three-phase smart meter according to the phase angle range; S24: If the wiring is wrong, the wrong wiring mode and wrong wiring duration are recorded; The S23 is specifically: S231: Since the wiring mode is unknown, the three currents are tentatively assumed to be I1, I2 and I3. Through steps S21 and S22, the phase angle relationship of each phase current relative to the corresponding phase voltage phasor is obtained, which is recorded as ∠UaI1, ∠UbI2 and ∠UcI3. The angles correspond to , , ; S232: According to , , Calculate the angles between I1 and I2, I2 and I3, and I3 and I1 as follows: ∠I1I2= ,∠I2I3= ,∠I3I1= ; S233: Determine the current direction: When the wiring is correct, the three current vectors are symmetrical, and the phase difference of the three current vectors is 120° respectively; the specific determination is as follows: Case 1: If ∠I1I2=120°, ∠I2I3=120°, ∠I3I1=120°, and it is a positive phase sequence, then the three-phase wiring is correct; Case 2: If ∠I1I2<120°, ∠I2I3=120°, ∠I3I1<120°, and it is a positive phase sequence, then I1 is connected inversely or I2 and I3 are connected inversely; adjust the direction of I1, that is , determine whether the three current vectors are symmetrical after the direction of I1 changes; if they are symmetrical and , , Less than 45°, it means I1 is reversed, recorded as -I1; if it is asymmetric or , , If it is greater than 45°, the direction of I1 will not be changed, and the directions of I2 and I3 will be adjusted at the same time, that is, , , and the conversion is within [0, 2π], then determine whether the three current directions after adjusting I2 and I3 are symmetrical. If they are symmetrical and , , If it is less than 45°, it means I2 and I3 are reversely connected, which is recorded as -I2 and -I3; Case 3: If ∠I1I2=120°, ∠I2I3<120°, ∠I3I1<120°, and it is a positive phase sequence, then I3 is connected in reverse or I1 and I2 are connected in reverse. According to the judgment method of case 2, the wiring method can be obtained by reasoning; except for the correct three-phase current wiring angle difference and phase difference, other cases are judged according to the above cases; S234: Re-phase the three currents I1, I2 and I3 after determining their directions: , , Convert it into an angle in the range of [0, 2π], and convert it into , , The corresponding currents are recorded as Ia, Ib, and Ic in the clockwise direction, and then the corresponding relationship and signs of Ia, Ib, and Ic are converted in the order of I1, I2, and I3. At this time, the incorrect wiring method is determined.

2. According to the method for real-time monitoring of incorrect wiring modes of three-phase smart meters according to claim 1, the S3 is specifically: S31: Calculate the power when the wiring is wrong and record it as P (error), P (error) = PA + PB + PC = UaIacosφ A +UbIbcosφ B +UcIccosφ C； S32: Calculate the power P (positive) when the wiring is correct, P (positive) = 3UxIcosφ; S33: Calculate the correction coefficient K X =P(correct) / P(wrong); S34: Calculate the replenishment power ∆A=(K X -1)*A(error), where A(error) is the amount of electricity measured in the three-phase smart meter during the duration of the wrong wiring.

3. A system for real-time monitoring of incorrect wiring modes of a three-phase smart meter, comprising: A data acquisition module, which is based on high-speed power line carrier technology (HPLC), uses a distributed HPLC module to collect and store high-frequency real-time data of the three-phase smart meter, and saves various types of power consumption data at specified time intervals. The power consumption data includes phase voltage, phase current, power factor, active power and reactive power corresponding to the three phases respectively; The wiring analysis module calculates the phase angle of each phase of each three-phase smart meter in combination with the power consumption data, and determines whether the wiring of the three-phase smart meter is correct. If the wiring is wrong, the wrong wiring mode and the duration of the wrong wiring are recorded, and the amount of electricity to be compensated is calculated; The compensatory power calculation module uses the power ratio corresponding to the correct wiring mode and the incorrect wiring mode as the power correction coefficient, and combines the power measured by the three-phase smart meter during the duration of the incorrect wiring to determine the compensatory power; The result output module sends the corresponding number of the three-phase smart meter, the result of the wiring analysis, and the amount of supplementary electricity to the concentrator; A data aggregation module, wherein the concentrator aggregates the miswiring mode and the supplementary power information of all three-phase smart meters in the substation area and uploads them to the power consumption information collection main station in real time; Furthermore, the result output module specifically attaches the judgment result of each three-phase smart meter, the number corresponding to the three-phase smart meter, the result of the wiring analysis, and the supplementary power to the HPLC protocol in the form of a data message and sends it to the concentrator based on the HPLC module; Further, the working steps of the wiring analysis module include: S21: Determine the reference voltage coordinate system: obtain the phase sequence status word, determine the voltage positive phase sequence or the voltage reverse phase sequence, if it is a positive phase sequence, the voltage reference reference is Ua, Ub, Uc, if it is a reverse phase sequence, the voltage reference reference is Ua, Uc, Ub; S22: Calculate the phase angle of each phase voltage and current: determine the positive and negative of active power P and reactive power Q, and the power factor Calculate the arc cosine value to obtain the phase angle of each phase voltage and current; S23: judging the wiring mode of the three-phase smart meter according to the phase angle range; S24: If the wiring is wrong, the wrong wiring mode and wrong wiring duration are recorded; Further, the S23 is specifically: S231: Since the wiring mode is unknown, the three currents are tentatively assumed to be I1, I2 and I3. Through steps S21 and S22, the phase angle relationship of each phase current relative to the corresponding phase voltage phasor is obtained, which is recorded as ∠UaI1, ∠UbI2 and ∠UcI3. The angles correspond to , , ; S232: According to , , Calculate the angles between I1 and I2, I2 and I3, and I3 and I1 as follows: ∠I1I2= ,∠I2I3= ,∠I3I1= ; S233: Determine the current direction: When the wiring is correct, the three current vectors are symmetrical, and the phase difference of the three current vectors is 120° respectively; the specific determination is as follows: Case 1: If ∠I1I2=120°, ∠I2I3=120°, ∠I3I1=120°, and it is a positive phase sequence, then the three-phase wiring is correct; Case 2: If ∠I1I2<120°, ∠I2I3=120°, ∠I3I1<120°, and it is a positive phase sequence, then I1 is connected inversely or I2 and I3 are connected inversely; adjust the direction of I1, that is , determine whether the three current vectors are symmetrical after the direction of I1 changes; if they are symmetrical and , , Less than 45°, it means I1 is reversed, recorded as -I1; if it is asymmetric or , , If it is greater than 45°, the direction of I1 will not be changed, and the directions of I2 and I3 will be adjusted at the same time, that is, , , and the conversion is within [0, 2π], then determine whether the three current directions after adjusting I2 and I3 are symmetrical. If they are symmetrical and , , If it is less than 45°, it means I2 and I3 are reversely connected, which is recorded as -I2 and -I3; Case 3: If ∠I1I2=120°, ∠I2I3<120°, ∠I3I1<120°, and it is a positive phase sequence, then I3 is connected in reverse or I1 and I2 are connected in reverse. According to the judgment method of case 2, the wiring method can be obtained by reasoning; except for the correct three-phase current wiring angle difference and phase difference, other cases are judged according to the above cases; S234: Re-phase the three currents I1, I2 and I3 after determining their directions: , , Convert it into an angle in the range of [0, 2π], and convert it into , , The corresponding current is recorded as Ia, Ib, Ic in clockwise direction, and then the corresponding relationship and sign of Ia, Ib, Ic are converted in the order of I1, I2, I3. At this time, the wrong wiring method is determined; Furthermore, the working steps of the supplementary power calculation module include: S31: Calculate the power when the wiring is wrong and record it as P (error), P (error) = PA + PB + PC = UaIacosφ A +UbIbcosφ B +UcIccosφ C； S32: Calculate the power P (positive) when the wiring is correct, P (positive) = 3UxIcosφ; S33: Calculate the correction coefficient K X =P(correct) / P(wrong); S34: Calculate the replenishment power ∆A=(K X -1)*A(error), where A(error) is the amount of electricity measured in the three-phase smart meter during the duration of the wrong wiring.

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