A HPLC electric energy meter phase identification and verification method, system and device

Abstract

The present application discloses a method, system, and device for phase identification and verification of an HPLC electric energy meter, relating to the field of power collection technology. Phase identification and verification of an HPLC electric energy meter is achieved by acquiring, analyzing, and processing HPLC archive data, collected data, and line loss data. The method comprises a phase identification and verification method, system, and device. First, the phase identification and verification system is connected to a database server; second, the program of the storage unit is read, information is exchanged with the database server, and the HPLC electric energy meter phase identification and verification is completed, achieving accurate phase identification of the HPLC electric energy meter; finally, the HPLC electric energy meter phase identification and verification results are sent to a display unit for centralized display.

Description

Technical Field

[0001] The present application relates to the field of power collection technology, and in particular to a method, system and device for phase identification and verification of an HPLC electric energy meter. Background Art

[0002] The widespread use of broadband power line carrier (HPLC) energy meters in low-voltage distribution networks has enabled them to collect rich data with high real-time availability. However, frequent phase confusion issues in these meters pose significant challenges to load control and line loss analysis.

[0003] Currently, HPLC electricity meter phase detection relies primarily on HPLC's phase recognition function, but recognition accuracy needs to be further improved, and verification methods are lacking. Consequently, HPLC electricity meter phase identification and verification have become urgent challenges. Summary of the Invention

[0004] In view of this, the present application provides a HPLC electricity meter phase identification and verification method, system and device, the main purpose of which is to solve the current problems of HPLC phase identification errors and lack of phase identification and verification methods.

[0005] According to the first aspect of the present application, a HPLC electric energy meter phase identification and verification method is provided, comprising:

[0006] Obtain HPLC energy meter archive and collection information. Archive information includes the meter's zone number, meter barcode, wiring method, integrated multiplier, and default phase. Collection information includes the meter's metering data collection time, energy readings, and voltage and current data.

[0007] The power data of each electric energy meter is obtained by differential calculation based on the collection time and the electric energy value indicated by the electric energy meter.

[0008] Obtain the power consumption of each phase. If the three-phase meter supports the power measurement function for phases A, B, and C, directly obtain the power consumption of phases A, B, and C. Otherwise, use the phase power integration to obtain the power consumption of each phase A, B, and C.

[0009] Obtain the default phase-by-phase line loss rate. Based on the default phase and power, analyze the difference between the phase-by-phase power supply and sales data and divide it by the phase-by-phase power supply to obtain the default phase-by-phase line loss rate. The power supply includes the forward power from the assessment table and the photovoltaic grid-connected power. The power sales include the reverse power from the assessment table and the user's power consumption.

[0010] Obtain HPLC meter phase identification data. Using the assessment meter's phase A, B, and C voltage data as a benchmark, calculate the correlation coefficient with the user meter's phase A, B, and C voltages. The phase with the largest correlation coefficient is taken as the phase identification result and marked as the identified phase.

[0011] Obtain a new phase-by-phase line loss rate and phase identification verification results. Based on the identified phase and power consumption, analyze the difference between the phase-by-phase power supply and sales data and divide it by the phase-by-phase power supply to obtain a new phase-by-phase line loss rate. Based on the default and new phase-by-phase line loss rates, analyze the changes and errors between them to determine the accuracy of the identified phase. If the new phase-by-phase line loss rate is reduced according to the identified phase and the three-phase line loss rate returns to normal, then the phase identification is accurate.

[0012] According to a second aspect of the present application, a HPLC electric energy meter phase identification and verification system is provided, the system comprising:

[0013] The network connection unit is used to establish a network connection with the database server.

[0014] Data and program storage unit, used to store data and programs.

[0015] The execution unit is used to read and execute the program of the storage unit, obtain the substation assessment form, user electric energy meter archive data, collection data, and phase line loss rate data;

[0016] The display unit is used to display phase identification and verification result information.

[0017] According to the third aspect of the present application, a HPLC electricity meter phase identification and verification device is provided, including a memory, a processor, and a display. The memory stores a computer program, and when the processor executes the computer program, the steps of the method described in any one of the first and second aspects are implemented, and the display displays the phase identification and verification results.

[0018] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0020] Figure 1 A schematic diagram of an HPLC electric energy meter phase identification and verification system provided in an embodiment of the present application is shown;

[0021] Figure 2AA schematic flow chart of a HPLC electric energy meter phase identification and verification method provided in an embodiment of the present application is shown;

[0022] Figure 2B shows a voltage sequence curve diagram provided by an embodiment of the present application;

[0023] Figure 2C shows a correlation coefficient diagram provided by an embodiment of the present application;

[0024] Figure 2D shows a phase line loss rate diagram provided by an embodiment of the present application;

[0025] Figure 2E A phase line loss rate reduction diagram provided in an embodiment of the present application is shown.

[0026] Figure 3 A schematic structural diagram of a HPLC electric energy meter phase identification and verification device provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0027] The following describes exemplary embodiments of the present application in more detail with reference to the accompanying drawings. Although exemplary embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present application and to fully convey the scope of the present application to those skilled in the art.

[0028] The present application embodiment provides a HPLC electric energy meter phase identification and verification method, such as Figure 1 As shown, the method includes:

[0029] 101. Establish a data connection with the database server.

[0030] 102. Call the stored procedure to interact with the database server and store data.

[0031] 103. Read and execute the program of the storage unit to obtain the substation assessment form, user electricity meter archive data, collection data, and phase line loss rate data.

[0032] 104. Send the phase identification and verification result information curve graph to a display terminal for display.

[0033] The method provided in the embodiments of this application comprises a method and system for phase identification and verification of HPLC electricity meters. First, the phase identification and verification system connects to a database server. Second, the program in the storage unit is read, information is exchanged with the database server, and the HPLC electricity meter phase identification and verification is completed. Finally, a display unit centrally displays the HPLC electricity meter phase identification and verification results, achieving accurate phase identification of the HPLC electricity meter.

[0034] The present application embodiment provides a HPLC electric energy meter phase identification and verification method, such as Figure 2A As shown, the method includes:

[0035] 201. Obtain the HPLC electric energy meter's archive and collection information. Archive information includes the meter's area number, meter barcode, wiring method, integrated multiplier, and default phase. Collection information includes the meter's metering data collection time, energy readings, and voltage and current data. This forms a time series data set.

[0036] 202. Obtain the power of each energy meter. Based on the energy meter acquisition time and energy indication, obtain the energy meter power data through differential calculation, as shown in formula (1).

[0037] W i (Δt)=(f(t+Δt)-f(t))k i (1)

[0038] Where Δt is the sampling time interval, such as 15 minutes; W i (Δt) is the amount of electricity stored by the i-th electric energy meter within Δt, kW·h, i∈[1 N], N is the number of electric energy meters in the substation; k i is the comprehensive multiplier of the i-th electric energy meter, dimensionless; f(t) is the electric energy indication of the electric energy meter at time t, and f(t+Δt) is the electric energy indication of the electric energy meter at time t+Δt.

[0039] 203. Obtain the phase-by-phase power. If the three-phase meter supports the A, B, and C phase power measurement function, directly obtain the A, B, and C phase power according to formula (1). Otherwise, use the phase power integration to obtain the phase-by-phase power of each phase A, B, and C, as shown in formula (2).

[0040]

[0041] Among them, k i , Δt, i are the same as in formula (1); W x,i (Δt) is the phase-by-phase electricity quantity of the i-th electric energy meter within Δt, and x is the phases A, B, and C.

[0042] Example 1: For a three-phase energy meter with a magnification of 100, during the period from 01:00 to 01:15, the power of phases A, B, and C are 2100, 2120, and 1810 kW. According to formula (2), the power of phases A, B, and C are 52500, 53000, and 45250 kW·h, respectively.

[0043] 204. Obtain the default phase-by-phase line loss rate. Based on the default phase and power, analyze the difference between the phase-by-phase power supply and sales data, divide it by the phase-by-phase power supply, and obtain the default phase-by-phase line loss rate, as shown in formula (3).

[0044]

[0045] Where, Δt is the same as formula (1); W phase,s (Δt) is the power supply of phases A, B, and C in the station area within Δt, W phase,u (Δt) is the power consumption of phases A, B, and C in the station area within Δt; ΔW phase (Δt) is the power loss of phases A, B, and C in the inner station area of ​​Δt; r phase (Δt) is the line loss rate of phases A, B, and C in the station area within Δt. N phase is the number of phases. phase is A, B, and C phase.

[0046] Example 2: Assume that the phase of a certain user is unknown and HPLC cannot identify the phase of the user's meter. The initial phase value is temporarily set to phase A. During the period from 01:00 to 01:15, the power supply of phases A, B, and C in the substation area is 101,000 kWh, 98,000 kWh, and 102,000 kWh, and the power sales are 108,000 kWh, 85,000 kWh, and 99,000 kWh. According to formula (3), the line loss rates of phases A, B, and C during this period are -6.93%, 13.26%, and 2.94%, respectively, and the total line loss rate is 2.99%.

[0047] 205. Obtain HPLC electric energy meter phase identification data. Using the assessment table A, B, and C phase voltage data as a benchmark, calculate the correlation coefficient with the user's electric energy meter A, B, and C phase voltages. Take the phase with the largest correlation coefficient as the phase identification result and mark it as the identified phase, as shown in formula (4).

[0048]

[0049] Among them, g phase U is the maximum value of the correlation coefficient between the phase voltage of the electric energy meter and the phase voltage of the assessment meter; phase,i,s is the voltage data of the phase i of the phase voltage sequence of the electric energy meter on the power supply side of the substation, U is the average value of the phase voltage sequence of the electric energy meter on the power supply side of the substation; phase,i,u is the voltage data of the phase voltage sequence of the electric energy meter at the power consumption side of the substation, is the average phase voltage sequence of the energy meter on the power consumption side of the substation. i is the phase voltage sequence number of the energy meter, and i is the length of the phase voltage sequence of the energy meter.

[0050] Example 3: Assume that the phase of a user is unknown and HPLC cannot identify the phase of the user's meter. The per-unit voltage values ​​of the assessment table and user meter are shown in Table 1. The plot is as follows: Figure 2B shown.

[0051] Table 1 Voltage per unit value

[0052]

[0053] Calculate the correlation of the voltage sequence with a length of 12 to get g phase =max([-0.0737 0.6341 -0.0580])=0.6341, obviously the voltage of phase B has the highest correlation, and the phase identification result of the user table is phase B. Figure 2C shown.

[0054] 206. Obtain a new phase-by-phase line loss rate and phase identification verification result. Based on the identified phase and power, analyze the difference between the phase-by-phase power supply and sales data and divide it by the phase-by-phase power supply to obtain a new phase-by-phase line loss rate. Based on the default phase-by-phase line loss rate and the new phase-by-phase line loss rate, analyze the changes and errors between the two to determine the accuracy of the identified phase. If the new phase-by-phase line loss rate is reduced according to the identified phase and the three-phase line loss rate returns to normal, then the phase identification is accurate.

[0055] In Example 3, the phase identification result of the user table is phase B. The phase-by-phase line loss rate of Example 2 is recalculated according to formula (3). During the period from 01:00 to 01:15, the power supply of phases A, B, and C in the substation area is 101, 98, and 102,000 kWh, and the power sales are 98,000, 95, and 99,000 kWh. The line loss rates of phases A, B, and C in this period are 2.97%, 3.06%, and 2.94%, respectively. The total line loss rate is still 2.99%. This shows that the initial phase value of phase A is wrong. After phase identification and phase-by-phase line loss analysis, it is verified that the phase identification result of phase B is accurate. Figure 2D 、 2E shown.

[0056] Further, as Figure 1 In the specific implementation of the method, the embodiment of the present application provides a HPLC electric energy meter phase identification and verification device, such as Figure 3 As shown, the device includes: a connection module 301 , an acquisition module 302 , and a display module 303 .

[0057] The connection module 301 is used to establish a data connection with a database server and call a stored procedure to perform data interaction with the database server.

[0058] The acquisition module 302 is used to obtain the phase identification and verification results of the HPLC electric energy meter.

[0059] The display module 303 is used to send the HPLC electric energy meter phase identification and verification result graph to a display terminal for display.

[0060] Those skilled in the art will understand that the accompanying drawings are only schematic diagrams of a preferred implementation scenario, and the modules or processes in the accompanying drawings are not necessarily required to implement the present application.

[0061] Those skilled in the art will appreciate that the modules in the devices in the implementation scenario can be distributed in the devices of the implementation scenario according to the implementation scenario description, or can be modified accordingly and located in one or more devices different from the implementation scenario. The modules in the above implementation scenario can be combined into one module or further split into multiple submodules.

[0062] The above application serial numbers are for description only and do not represent the advantages or disadvantages of the implementation scenarios.

[0063] The above disclosure only describes several specific implementation scenarios of the present application. However, the present application is not limited thereto, and any changes that can be conceived by those skilled in the art should fall within the scope of protection of the present application.

Claims

1. A HPLC electric energy meter phase identification and verification method, characterized in that: include: Establishing a data connection with a database server and calling an identification and verification program to perform data interaction with the database server; Obtaining HPLC electric energy meter phase identification and verification analysis results, and drawing a phase identification curve diagram and a line loss rate analysis comparison diagram based on the identification and verification analysis results; Obtaining HPLC power meter phase identification and verification analysis results includes: Obtain HPLC electric energy meter file information and collection information: file information includes the default phase; collection information includes the electric energy meter measurement data collection time and electric energy indication; Obtaining the power of each electric energy meter: Based on the electric energy meter measurement data collection time and electric energy indication, obtaining the electric energy meter power data by differential calculation; Get phase power; Obtaining the default phase-by-phase line loss rate: Based on the default phase and power, the difference between the phase-by-phase power supply and sales data is analyzed and divided by the phase-by-phase power supply to obtain the default phase-by-phase line loss rate; Obtain HPLC electric energy meter phase identification data: Using the assessment table A, B, and C phase voltage data as a benchmark, calculate the correlation coefficient with the user's electric energy meter A, B, and C phase voltages respectively. Take the phase with the largest correlation coefficient as the phase identification result and mark it as the identified phase. Obtain a new phase-by-phase line loss rate and phase identification verification results: Based on the identified phase and power, analyze the difference between the phase-by-phase power supply and sales data, and divide it by the phase-by-phase power supply to obtain a new phase-by-phase line loss rate. Based on the default phase-by-phase line loss rate and the new phase-by-phase line loss rate, analyze the changes and errors between the two to determine the accuracy of the identified phase. If the new phase-by-phase line loss rate is reduced according to the identified phase and the three-phase line loss rate is normal, then the phase identification is accurate. The phase identification curve diagram and the line loss rate analysis comparison diagram are sent to a display terminal for display.

2. The method according to claim 1, characterized in that The obtaining of HPLC electric energy meter phase identification and verification analysis results includes: The file information also includes the area number of the electric energy meter, the electric energy meter barcode, the wiring method, and the comprehensive multiplier; The collected information also includes voltage and current data of the electric energy meter; The obtaining of the phase power specifically includes: if the three-phase meter supports the A, B, C phase power measurement function, directly obtaining the A, B, C phase power; otherwise, using the phase power integration to obtain the A, B, C phase power.

3. A HPLC electric energy meter phase identification and verification device, characterized in that: The method comprises a memory, a processor, and a display, wherein the memory stores a computer program, the processor executes the computer program, and the display displays phase identification and verification analysis results; when the computer program is executed by the processor, the steps of the method according to any one of claims 1 to 2 are implemented.

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