Intelligent discrimination method and device for diagnosing current secondary circuit wiring under load

Abstract

The application discloses a kind of intelligent discrimination method and device of diagnosing current secondary circuit wiring with load comprising: in discrimination interface editing;Input data;Obtain diagnostic results;The discrimination interface includes, equipment name, loop type, active and reactive, CT transformation ratio, phase compensation mode, reference phase mode, current primary and secondary amplitude, current phase;The input data includes, phase discrimination error, angle compensation angle, current amplitude error;The diagnostic results include, according to current amplitude verification, phase sequence polarity verification obtains diagnostic results and discriminates the correctness of diagnosing current secondary circuit wiring with load.Automatically experienced judgment when data is abnormal is converted into intelligent, digital judgment, which makes up for the lack of experience and slow analysis when different personnel face data anomalies, adapts to the trend of intelligent and digital operation, effectively shortens the fault analysis time, provides effective guidance for troubleshooting, and ensures normal operation of equipment.

Description

Technical Field

[0001] This invention relates to the field of computer platform load balancing technology, specifically to an intelligent identification method for secondary circuit wiring of load diagnostic current. Background Technology

[0002] Before new equipment is put into operation, after the current boost test and polarity test verify that the wiring of the secondary current circuit is correct, the secondary current circuit is modified again but not restored correctly. This often leads to abnormal data in the load direction determination after power is supplied. When the above situation has occurred, the wiring of the current circuit is usually checked based on the experience of the commissioning personnel. If the wiring error of the secondary current circuit cannot be quickly analyzed, the troubleshooting time will be increased and the commissioning time will be delayed.

[0003] Some monitoring and control devices can issue alarms when the phase sequence or polarity wiring of the secondary current loop is incorrect, but they cannot diagnose the specific wiring error. Mainstream phase meters can measure the phase angle of the three-phase current, but they cannot quickly diagnose incorrect current loop wiring, such as incorrect phase sequence wiring or incorrect polarity wiring.

[0004] This device can compensate for the lack of experience and slow analysis by different personnel when faced with data anomalies. It adapts to the trend of intelligent and digital operation and maintenance, effectively shortens the fault analysis time, provides effective guidance for fault diagnosis, and ensures the normal operation of equipment. Summary of the Invention

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0006] In view of the above-mentioned problems, the present invention is proposed.

[0007] Therefore, the technical problem solved by this invention is that existing measurement and control devices can issue alarms when the phase sequence or polarity wiring of the secondary current loop is incorrect, but they cannot diagnose specific wiring errors. Mainstream phase meters can measure the phase angle of the three-phase current, but they cannot quickly diagnose incorrect current loop wiring.

[0008] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an intelligent discrimination method for secondary circuit wiring of on-load diagnostic current, comprising:

[0009] Edit the diagnostic interface, input data in the parameter setting interface, and obtain the diagnostic results;

[0010] The discrimination interface includes: device name, circuit type, active and reactive power, CT ratio, phase compensation mode, reference phase mode, primary and secondary current amplitude, and current phase.

[0011] The input data includes phase discrimination error, rotation angle compensation angle, and current amplitude error;

[0012] The process of obtaining diagnostic results includes determining the correctness of the secondary circuit wiring for the on-load diagnostic current based on current amplitude verification and phase sequence polarity verification.

[0013] As a preferred embodiment of the intelligent discrimination method for secondary circuit wiring of on-load diagnostic current according to the present invention, the input data includes:

[0014] The device name and circuit type input boxes are editable and can accept text and numbers.

[0015] The active power and reactive power input boxes can only edit and input numbers, including positive and negative numbers and decimals;

[0016] The input boxes for CT primary and secondary ratio values ​​can only be edited and positive integers can be entered.

[0017] The input boxes for three-phase primary current and three-phase secondary circuits can only be edited and positive numbers can be entered.

[0018] The three-phase current phase input box can only edit and input numbers within the range of -360 to 360, including decimals;

[0019] In the phase compensation mode selection box, the power compensation option is automatically set to True initially, while the phase compensation and angle compensation option boxes are automatically set to False initially.

[0020] In the reference phase mode radio button, the initial state of the voltage leading current option box is automatically set to True, and the initial state of the current leading voltage option box is automatically set to False.

[0021] As a preferred embodiment of the intelligent discrimination method for secondary circuit wiring of on-load diagnostic current according to the present invention, the interface editing includes:

[0022] Reset power data; Reset turns ratio data; Reset current data; Reset phase data; Current amplitude verification; Phase sequence polarity verification; Enter data; Reset phase sequence polarity diagnostic results; Reset current amplitude diagnostic results; Settings; Vector graph display.

[0023] As a preferred embodiment of the intelligent discrimination method for secondary circuit wiring of on-load diagnostic current described in this invention, the interface editing further includes:

[0024] Clicking the "Reset Power Data" button will clear the data in the active power and reactive power input boxes.

[0025] Clicking the "Reset Transformation Ratio Data" button will clear the data in the CT primary transformation ratio value and CT secondary transformation ratio value input boxes.

[0026] Clicking the "Reset Current Data" button will clear the data in the three-phase primary current and secondary current input boxes.

[0027] Clicking the "Reset Phase Data" button will clear the phase data of the A, B, and C phase currents.

[0028] Clicking "Enter Data" will save the input data and output results in the current interface, including device name, circuit number, power, transformation ratio, current amplitude and phase, phase compensation mode, reference phase mode, setting parameters, and diagnostic results.

[0029] The setting parameters include phase discrimination error, rotation angle compensation angle, and current amplitude error;

[0030] Click "Reset Phase Sequence Polarity Diagnostic Results" to clear the wiring diagnostic results;

[0031] Click "Reset Current Amplitude Diagnostic Results" to clear the amplitude diagnostic results;

[0032] Clicking the settings button will bring up the parameter settings interface, which displays the data from the last application save and allows you to edit the parameters.

[0033] As a preferred embodiment of the intelligent discrimination method for secondary circuit wiring of on-load diagnostic current according to the present invention, the input data includes:

[0034] In the phase discrimination error input box, you can only edit or enter numbers between 0 and 20;

[0035] In the corner compensation angle input box, you can only edit or enter two data: 30 or -30. The following note is next to the input box: For 11 o'clock wiring, please enter -30; for 1 o'clock wiring, please enter 30.

[0036] In the current amplitude error input box, you can only edit and enter numbers between 0 and 1;

[0037] After clicking the Apply button, the following steps will be executed sequentially;

[0038] Determine if the input data meets the requirements. If any of the input data, such as phase discrimination error, rotation angle compensation angle, or current amplitude error, does not meet the requirements or is empty, a prompt box will pop up asking you to check and enter the parameters.

[0039] When the input data meets the requirements, the settings parameters are saved for use by the judgment program, and the settings window is automatically closed;

[0040] Clicking the close button closes the settings window. The parameter settings will not be applied, and the previously applied settings will remain unchanged.

[0041] As a preferred embodiment of the intelligent discrimination method for secondary circuit wiring of on-load diagnostic current according to the present invention, the current amplitude verification includes:

[0042] Start the amplitude data self-test program to determine whether the data in the input boxes of CT primary ratio, CT secondary ratio, three-phase primary current and three-phase secondary current meet the requirements.

[0043] When any input box is empty, or the input format is incorrect, a prompt box will pop up asking you to check and enter the turns ratio and current data.

[0044] When the input data format meets the requirements, the amplitude verification program is started. Based on the transformation ratio, primary current value, and secondary current value, it calculates and judges whether the current amplitude is normal, and displays the results in the ABC phase amplitude diagnosis result text box on the interface.

[0045] As a preferred embodiment of the intelligent discrimination method for the secondary circuit wiring of the on-load diagnostic current described in this invention, the phase sequence polarity verification includes:

[0046] Start the phase sequence data self-test program to determine whether the active power, reactive power, and three-phase current phase input data meet the requirements.

[0047] When either the power data input box or the phase data input box is empty or the data format does not meet the requirements, a prompt box will pop up asking you to check and enter the power and phase data.

[0048] When the data meets the requirements, the phase sequence verification program is started to calculate and determine whether the polarity phase sequence is normal, and the result is displayed in the three-phase phase sequence polarity discrimination result text box on the interface.

[0049] As a preferred embodiment of the intelligent discrimination method for secondary circuit wiring of on-load diagnostic current according to the present invention, the vector diagram display includes:

[0050] Read the data from the three-phase secondary current input box; read the three-phase phase data; pop up the current vector diagram window.

[0051] As a preferred embodiment of the intelligent discrimination method for secondary circuit wiring of on-load diagnostic current according to the present invention, the reading of data from the three-phase secondary current input box includes:

[0052] If the data format of any one phase does not meet the requirements or is empty, the displayed amplitude of the three-phase current is set to 1; if the data format of the amplitude of the three-phase secondary current meets the requirements, the value with the largest amplitude is selected as the base, and the displayed amplitude of the three-phase current is the secondary amplitude of each phase divided by the base.

[0053] The reading of three-phase phase data includes setting the displayed phase of any phase to 0 if the data of that phase does not meet the format requirements or is empty.

[0054] A smart identification method for secondary circuit wiring of on-load diagnostic current, characterized in that it includes:

[0055] Shell module, power supply module, charging module, display module, system module;

[0056] The outer casing module protects the power module, charging module, display module, and system module.

[0057] The power module is activated by a power switch;

[0058] The charging module charges the system module via a 220V charging port;

[0059] The display module operates the system module via an LCD screen.

[0060] The system module is based on the current phase angle feature matrix to intelligently determine the correctness of the load judgment result. It can also quickly diagnose more than 40 possible wiring errors in the secondary current circuit when the load judgment direction data is abnormal, transforming the manual experience judgment when the load judgment direction data is abnormal into intelligent and digital judgment.

[0061] The beneficial effects of this invention are as follows: The intelligent identification method and system for secondary circuit wiring under load diagnostic current provided by this invention can be used in production sites, flexibly and conveniently assisting in the rapid identification of secondary wiring; it can identify whether the amplitude, phase sequence, and polarity of the secondary current are correct, and can identify incorrect wiring of phase sequence and polarity; it can generate text and table files from input data and identification results; the identification algorithm program of this invention is highly flexible, and can be further developed and promoted based on the existing waveform recording and information protection platform in the future, thereby improving the efficiency of intelligent operation and maintenance. Attached Figure Description

[0062] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0063] Figure 1A schematic diagram of the discrimination interface of an intelligent discrimination method for secondary circuit wiring of load diagnostic current provided in the first embodiment of the present invention;

[0064] Figure 2 A schematic diagram of the current vector for an intelligent discrimination method for the secondary circuit wiring of a load diagnostic current provided in the first embodiment of the present invention;

[0065] Figure 3 A schematic diagram of the parameter setting interface for an intelligent discrimination method for secondary circuit wiring of overload diagnostic current provided in the first embodiment of the present invention;

[0066] Figure 4 The diagram shows the structure of an intelligent identification method for the secondary circuit wiring of a load diagnostic current provided in two embodiments of the present invention. Detailed Implementation

[0067] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0068] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0069] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0070] This invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of this invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not be construed as limiting the scope of protection of this invention. In actual fabrication, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0071] Furthermore, in the description of this invention, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the method or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. In addition, the terms "first," "second," or "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0072] Unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" in this invention should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; similarly, they can refer to mechanical connections, electrical connections, or direct connections, or indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0073] Example 1

[0074] Reference Figure 1-3 As an embodiment of the present invention, an intelligent identification method for the secondary circuit wiring of the load diagnostic current is provided.

[0075] like Figure 1 As shown, you can edit, input data, and obtain diagnostic results in the discrimination interface;

[0076] The discrimination interface includes device name, circuit type, active and reactive power, CT ratio, phase compensation mode, reference phase mode, primary and secondary current amplitude, and current phase.

[0077] The input data includes:

[0078] The device name and circuit type input boxes are editable and can accept text and numbers.

[0079] The active power and reactive power input boxes can only edit and input numbers, including positive and negative numbers and decimals;

[0080] The input boxes for CT primary and secondary ratio values ​​can only be edited and positive integers can be entered.

[0081] The input boxes for three-phase primary current and three-phase secondary circuits can only be edited and positive numbers can be entered.

[0082] The three-phase current phase input box can only edit and input numbers within the range of -360 to 360, including decimals;

[0083] In the phase compensation mode selection box, the power compensation option is automatically set to True initially, while the phase compensation and angle compensation option boxes are automatically set to False initially.

[0084] In the reference phase mode radio button, the initial state of the voltage leading current option box is automatically set to True, and the initial state of the current leading voltage option box is automatically set to False.

[0085] The interface editing includes:

[0086] Reset power data; Reset turns ratio data; Reset current data; Reset phase data; Current amplitude verification; Phase sequence polarity verification; Enter data; Reset phase sequence polarity diagnostic results; Reset current amplitude diagnostic results; Settings; Vector graph display.

[0087] The interface editing also includes:

[0088] Clicking the "Reset Power Data" button will clear the data in the active power and reactive power input boxes.

[0089] Clicking the "Reset Transformation Ratio Data" button will clear the data in the CT primary transformation ratio value and CT secondary transformation ratio value input boxes.

[0090] Clicking the "Reset Current Data" button will clear the data in the three-phase primary current and secondary current input boxes.

[0091] Clicking the "Reset Phase Data" button will clear the phase data of the A, B, and C phase currents.

[0092] Clicking "Enter Data" will save the input data and output results in the current interface, including device name, circuit number, power, transformation ratio, current amplitude and phase, phase compensation mode, reference phase mode, setting parameters, and diagnostic results.

[0093] The setting parameters include phase discrimination error Er, rotation angle compensation angle Pt, and current amplitude error Ar.

[0094] Click "Reset Phase Sequence Polarity Diagnostic Results" to clear the wiring diagnostic results;

[0095] Click "Reset Current Amplitude Diagnostic Results" to clear the amplitude diagnostic results;

[0096] Clicking the settings button will bring up the parameter settings interface, which displays the data from the last application save and allows you to edit the parameters.

[0097] like Figure 3 As shown, the parameter settings include: the ability to input data in the parameter setting interface;

[0098] The input data includes phase discrimination error, rotation angle compensation angle, and current amplitude error;

[0099] The phase discrimination error input box can only be edited and input with numbers between 0 and 20;

[0100] The angle compensation input box can only edit and input two data points: 30 or -30. The following note is provided next to the input box: For 11 o'clock wiring, please input 30; for 1 o'clock wiring, please input -30.

[0101] The current amplitude error input box can only be edited and a number between 0 and 1 can be entered.

[0102] After clicking the Apply button, the following steps will be executed sequentially;

[0103] Determine if the input data meets the requirements. If any of the input data, such as phase discrimination error, rotation angle compensation angle, or current amplitude error, does not meet the requirements or is empty, a prompt box will pop up asking you to check and enter the parameters.

[0104] When the input data meets the requirements, the settings parameters are saved for use by the judgment program, and the settings window is automatically closed;

[0105] Clicking the close button closes the settings window. The parameter settings will not be applied, and the previously applied settings will remain unchanged.

[0106] The current amplitude verification includes:

[0107] The amplitude data self-test program is initiated to determine whether the data in the input boxes for the CT primary ratio, CT secondary ratio, three-phase primary current, and three-phase secondary current meet the requirements. If any input box is empty or the input format is incorrect, a prompt box will pop up asking you to check and enter the ratio and current data.

[0108] When the input data format meets the requirements, the amplitude verification program is started. Based on the transformation ratio, primary current value, and secondary current value, it calculates and judges whether the current amplitude is normal, and displays the results in the ABC phase amplitude diagnosis result text box on the interface.

[0109] The phase sequence polarity verification includes:

[0110] Start the phase sequence data self-test program to determine whether the active power, reactive power, and three-phase current phase input data meet the requirements.

[0111] When either the power data input box or the phase data input box is empty or the data format does not meet the requirements, a prompt box will pop up asking you to check and enter the power and phase data.

[0112] Once the data meets the requirements, the phase sequence verification program is started to calculate and determine whether the polarity phase sequence is normal, and the result is displayed in the three-phase phase sequence polarity discrimination result text box on the interface.

[0113] like Figure 2 As shown, the vector graph includes:

[0114] The system reads data from the three-phase secondary current input boxes. If any phase data format does not meet the requirements or is empty, the displayed amplitude of all three-phase currents is set to 1. If the three-phase secondary current amplitude data format meets the requirements, the value with the largest amplitude is selected as the base, and the displayed amplitude of the three-phase current is the secondary amplitude of each phase divided by the base. Reading the three-phase phase data includes setting the displayed phase of any phase to 0 if the data of any phase does not meet the format requirements or is empty. If the three-phase phase data meets the format requirements, the system determines the "reference phase mode": if the mode is "voltage leads current", the three-phase "displayed phase" is the corresponding phase data read; if the mode is "current leads voltage", the three-phase "displayed phase" is 360° minus the corresponding phase data read.

[0115] A current vector diagram window will pop up. Figure 2 This is a schematic diagram of a current vector. The window displays a current vector diagram, showing the amplitude and phase of the current based on the data in the three-phase secondary current input boxes and the three-phase phase data. The schematic diagram is shown below. Figure 2 As shown, the positive longitudinal axis is 0°, and counterclockwise rotation is the lead angle. Phase A is yellow, phase B is green, and phase C is red. Figure 2 As shown, the A phase color is yellow at 0°, the C phase color is red between 90° and 180°, and the B phase color is green between 180° and 270°.

[0116] Compared to existing technologies, this invention constructs an intelligent judgment method for the wiring of secondary circuits in load-bearing diagnostic current. It can intelligently judge the correctness of load judgment results and quickly diagnose more than 40 possible wiring errors in the secondary circuits of current when load-bearing directional data is abnormal. It transforms manual experience-based judgment when load-bearing directional data is abnormal into intelligent and digital judgment, making up for the shortcomings of insufficient experience and slow analysis by different personnel when facing data anomalies. It adapts to the trend of intelligent and digital operation and maintenance, effectively shortens fault analysis time, provides effective guidance for fault diagnosis, and ensures normal equipment operation.

[0117] Example 2

[0118] Reference Figure 4 According to one embodiment of the present invention, an intelligent discrimination device for secondary circuit wiring of load diagnostic current is provided, comprising: a housing module 100, a power supply module 200, a charging module 300, a display module 400, and a system module 500.

[0119] The outer casing module 100 includes a power module 200, a charging module 300, a display module 400, and a system module 500. The power module 200 is connected to the charging module 300 through a charging port, and the display module 400 displays the data of the system module 500.

[0120] Based on the current phase angle feature matrix, the system module 500 can intelligently determine the correctness of the load judgment result, and can quickly diagnose more than 40 possible wiring errors in the secondary current circuit when the load judgment direction data is abnormal, transforming the manual experience judgment when the load judgment direction data is abnormal into intelligent and digital judgment.

[0121] The method of this invention makes up for the shortcomings of insufficient experience and slow analysis when different personnel face data anomalies. It adapts to the trend of intelligent and digital operation and maintenance, effectively shortens the fault analysis time, provides effective guidance for fault diagnosis, ensures normal operation of equipment, has a highly flexible judgment algorithm program, and can be further developed and promoted based on the existing waveform recording and information protection platform to improve the efficiency of intelligent operation and maintenance.

[0122] Example 3

[0123] The specific implementation method of an intelligent discrimination device for the secondary circuit wiring of a load diagnostic current is as follows:

[0124] Step 1: Determine if the "Phase Sequence Polarity Verification" button has been clicked to start. If it has been started, proceed to Step 2; otherwise, wait.

[0125] Step 2: Read the following data:

[0126] (1) Active power P, reactive power Q;

[0127] (2) Phase data: Phase-A, phase-B, and phase-C of the three-phase currents ABC;

[0128] (3) Phase compensation mode: power compensation bit Fg, polarity compensation bit Fk, angle compensation bit Ft (interface object is checkbox);

[0129] (4) Reference phase mode: voltage leads current level UI, current leads voltage level IU (the interface object is the option button);

[0130] (5) Phase discrimination error Er and rotation angle compensation angle Pt in parameter settings.

[0131] Step 3: Determine if the input numerical data format meets the requirements. If any of the data in P, Q, phase-A, phase-B, or phase-C is empty or does not meet the requirements, a prompt box will pop up saying "Please check and enter the power and phase data," and you will return to Step 1; if all meet the requirements, proceed to Step 4.

[0132] Step 4: Determine the reference phase mode bit data. If both the voltage-leading-current bit U_I and the current-leading-voltage bit I_U are false, a "Please check and select the reference phase mode" prompt box will appear, and you will return to the previous step. If both the voltage-leading-current bit U_I and the current-leading-voltage bit I_U are true, proceed to step 5. If both the voltage-leading-current bit U_I and the current-leading-voltage bit I_U are true, perform current phase reference conversion.

[0133] phase_A = 360 – phase_A

[0134] phase_B = 360 – phase_B

[0135] phase_C = 360 – phase_C;

[0136] Step 5: Determine the input phase compensation mode bit data. If all three bits—power compensation bit F_g, polarity compensation bit F_k, and angle compensation bit F_t—are false, a prompt box will pop up saying "Please check and select phase compensation mode," and the process will return to Step 1; if at least one of F_g, F_k, and F_t is true, proceed to Step 6.

[0137] Step 6: Determine the power compensation bit F_g. If it is false, the power compensation angle g_ph = 0; if it is true, the power compensation angle g_ph is calculated as follows:

[0138]

[0139] Where g_ph represents the power compensation angle, P represents active power, Q represents reactive power, and arccos represents the inverse trigonometric function;

[0140] Step 7: Determine the polarity compensation bit F_k. If it is false, the polarity compensation angle k_ph = 0; if it is true, the polarity compensation angle k_ph = 180°.

[0141] Step 8: Determine the corner compensation value F_t. If it is false, the corner compensation angle t_ph = 0; if it is true, the corner compensation angle t_ph = Pt.

[0142] Step 9: Compensate and correct the three-phase current phases, perform equivalent rotation on the three-phase current phases, and correct the three-phase current phases.

[0143] phase_A = phase_A + 360 * n

[0144] phase_B = phase_B + 360 * n

[0145] phase_C = phase_C + 360 * n

[0146] where n is a positive integer, ensuring that phase_A, phase_B, and phase_C are all greater than or equal to 0 and less than or equal to 360;

[0147] Step 10: Create a characteristic phase value array c[5] and a result output string array s[5]:

[0148] c(0) = 0: c(1) = 60: c(2) = 120: c(3) = 180: c(4) = 240: c(5) = 300

[0149] s(0) = "Wiring is correct": s(1) = "The leading phase polarity is reversed and then connected to this phase": s(2) = "The lagging phase is connected to this phase": s(3) = "The polarity of this phase is reversed": s(4) = "The leading phase is connected to this phase": s(5) = "The lagging phase polarity is reversed and then connected to this phase";

[0150] Step 11: Take a phase phase for discrimination. If phase > 340, c(0) = 360, otherwise c(0) = 0. Compare phase with c. If |phase – c(j)| < Er, the diagnostic result relt of this phase is s(j). If none of the c(j) satisfies the condition, let relt = "Discrimination error, please check the input value", where j ∈ {0, 1, 2, 3, 4, 5}.

[0151] Step 12: Determine whether all three phases A, B, and C have been discriminated. If not, return to Step 10. If discriminated, output the discrimination results of the three phases to the interface.

[0152] Step 13: Determine whether the "Current amplitude verification" button has been clicked to start. If started, execute Step 14. If not started, wait;

[0153] Step 14: Read the following data in the discrimination interface and parameter setting interface:

[0154] (1) Ratio data: primary current ratio N1, secondary current ratio N2;

[0155] (2) Amplitude data: primary values of three-phase currents IA1, IB1, IC1, secondary values of three-phase currents IA2, IB2, IC2;

[0156] (3) Current amplitude error Ar.

[0157] Step 15: Determine whether the numerical data meets the requirements. If any of the data N1, N2, IA1, IB1, IC1, IA2, IB2, IC2 does not meet the format requirements or is empty, a prompt box of "Please check and enter the turns ratio and current amplitude data" will pop up, and return to Step 13; if all meet the requirements, execute Step 16;

[0158] Step 16: Select one phase Ix for discrimination. I_real = Ix1 / (N1 / N2). If |(Ix2 - I_real) / I_real| < Ar, the amplitude verification result of this phase is "normal amplitude", otherwise the result is "abnormal amplitude". (where Ix1 represents the primary value of the current of a certain phase, and Ix2 represents the secondary value of the current of a certain phase).

[0159] Step 17: Determine whether all three phases A, B, and C have been discriminated. If not, return to Step 16. If discriminated, output the discrimination results of the three phases to the interface.

[0160] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. An intelligent method for identifying the wiring of a secondary circuit for on-load diagnostic current, characterized in that, include: Edit the diagnostic interface, enter data in the parameter setting interface, and obtain the diagnostic results; The discrimination interface includes: device name, circuit type, active and reactive power, CT ratio, phase compensation mode, reference phase mode, primary and secondary current amplitude, and current phase. The input data includes phase discrimination error, rotation angle compensation angle, and current amplitude error; The process of obtaining diagnostic results includes determining the correctness of the secondary circuit wiring for the on-load diagnostic current based on current amplitude verification and phase sequence polarity verification. The input data includes: In the phase discrimination error input box, only positive numbers can be edited and entered; In the corner compensation angle input box, you can only edit or enter two data: 30 or -30. The following note is next to the input box: For 11 o'clock wiring, please enter 30; for 1 o'clock wiring, please enter -30. In the current amplitude error input box, you can only edit and enter numbers between 0 and 1; After clicking the Apply button, the following steps will be executed sequentially; Determine if the input data meets the requirements. If any of the input data, such as phase discrimination error, rotation angle compensation angle, or current amplitude error, does not meet the requirements or is empty, a prompt box will pop up asking you to check and enter the parameters. When the input data meets the requirements, the settings parameters are saved for use by the judgment program, and the settings window is automatically closed; Click the close button on the window to close the settings window interface. The parameter settings will not be applied, and the previously applied settings will not be changed. The phase sequence polarity verification includes: starting the phase sequence data self-test program, judging whether the active power, reactive power, phase data, phase compensation mode, reference phase mode, phase discrimination error in parameter settings, rotation angle compensation angle and three-phase current phase input box data meet the requirements. When either the power data input box or the phase data input box is empty or the data format does not meet the requirements, a prompt box will pop up asking you to check and enter the power and phase data. When the data meets the requirements, the phase sequence verification program is started to calculate and determine whether the polarity phase sequence is normal, and the result is displayed in the three-phase phase sequence polarity discrimination result text box on the interface. The phase compensation mode includes: power compensation bit, polarity compensation bit, and corner compensation bit; The reference phase mode includes voltage leading current level and current leading voltage level; The power compensation bit is represented as follows: ； in, This is represented as the power compensation angle. Indicates active power. Indicates reactive power. Represents inverse trigonometric functions; The interface editing includes: resetting power data; resetting transformer ratio data; resetting current data; resetting phase data; current amplitude verification; phase sequence polarity verification; data entry; resetting phase sequence polarity diagnostic results; resetting current amplitude; diagnostic results; settings; vector graph display; The vector graph display includes reading data from the three-phase secondary current input box, reading three-phase phase data, and popping up the current vector graph window; The data read from the three-phase secondary current input box includes: If the data format of any one phase does not meet the requirements or is empty, the displayed amplitude of the three-phase current is set to 1; if the data format of the amplitude of the three-phase secondary current meets the requirements, the value with the largest amplitude is selected as the base, and the displayed amplitude of the three-phase current is the secondary amplitude of each phase divided by the base. The reading of three-phase phase data includes setting the displayed phase of any phase to 0 if the data of that phase does not meet the format requirements or is empty.

2. The intelligent identification method for secondary circuit wiring of on-load diagnostic current as described in claim 1, characterized in that, The input data includes: The device name and circuit type input boxes are editable and can accept text and numbers. The active power and reactive power input boxes can only edit and input numbers, including positive and negative numbers and decimals; The input boxes for CT primary and secondary ratio values ​​can only be edited and positive integers can be entered. The input boxes for three-phase primary current and three-phase secondary circuits can only be edited and positive numbers can be entered. The three-phase current phase input box can only edit and input numbers within the range of -360 to 360, including decimals; In the phase compensation mode selection box, the power compensation option is automatically set to True initially, while the phase compensation and angle compensation option boxes are automatically set to False initially. In the reference phase mode radio button, the initial state of the voltage leading current option box is automatically set to True, and the initial state of the current leading voltage option box is automatically set to False.

3. The intelligent identification method for secondary circuit wiring of on-load diagnostic current as described in claim 2, characterized in that, The interface editing also includes: Clicking the "Reset Power Data" button will clear the data in the active power and reactive power input boxes. Clicking the "Reset Transformation Ratio Data" button will clear the data in the CT primary transformation ratio value and CT secondary transformation ratio value input boxes. Clicking the "Reset Current Data" button will clear the data in the three-phase primary current and secondary current input boxes. Clicking the "Reset Phase Data" button will clear the phase data of the A, B, and C phase currents. Clicking "Enter Data" will save the input data and output results in the current interface, including device name, circuit number, power, transformation ratio, current amplitude and phase, phase compensation mode, reference phase mode, setting parameters, and diagnostic results. The setting parameters include phase discrimination error, rotation angle compensation angle, and current amplitude error; Click "Reset Phase Sequence Polarity Diagnostic Results" to clear the wiring diagnostic results; Click "Reset Current Amplitude Diagnostic Results" to clear the amplitude diagnostic results; Clicking the settings button will bring up the parameter settings interface, which displays the data from the last application save and allows you to edit the parameters.

4. The intelligent identification method for secondary circuit wiring of on-load diagnostic current as described in claim 3, characterized in that, The current amplitude verification includes: Start the amplitude data self-test program to determine whether the data in the input boxes of CT primary ratio, CT secondary ratio, three-phase primary current and three-phase secondary current meet the requirements. When any input box is empty, or the input format is incorrect, a prompt box will pop up asking you to check and enter the turns ratio and current data. When the input data format meets the requirements, the amplitude verification program is started. Based on the transformation ratio, primary current value, and secondary current value, it calculates and judges whether the current amplitude is normal, and displays the results in the ABC phase amplitude diagnosis result text box on the interface.

5. An intelligent discrimination device for secondary circuit wiring of load diagnostic current, employing the intelligent discrimination method for secondary circuit wiring of load diagnostic current as described in any one of claims 1 to 4, characterized in that, include: Housing module (100), power supply module (200), charging module (300), display module (400), system module (500); The outer casing module (100) protects the power module (200), charging module (300), display module (400), and system module (500) through the outer casing. The power module (200) starts the system module (500) via a power switch. The charging module (300) charges the system module (500) through a 220V charging port; The display module (400) operates the system module (500) through the liquid crystal operation display screen. The system module (500) is a system that intelligently judges the correctness of the load judgment result based on the current phase angle feature matrix, and can quickly diagnose more than 40 possible wiring errors of the current secondary circuit when the load judgment direction data is abnormal, transforming the manual experience judgment when the load judgment direction data is abnormal into intelligent and digital judgment.

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