A fault detection method, device, apparatus, system and storage medium

Abstract

Embodiments of the present application disclose a fault detection method, which comprises: determining a first target power line, a second target power line and a third target power line in a three-phase power supply device; wherein the three-phase power supply device is used to supply power for user power consumption equipment; detecting a first target voltage between the first target power line and the second target power line, and a second target voltage between the first target power line and the third target power line; determining a fault detection result based on the first target voltage and the second target voltage; wherein the fault detection result is used to indicate whether wiring error occurs in the three-phase power supply device; if the fault detection result indicates that wiring error occurs in the three-phase power supply device, generating first prompt information; wherein the first prompt information is used to prompt that wiring error occurs in the three-phase power supply device. Embodiments of the present application also disclose a fault detection device, equipment, system and storage medium.

Description

Technical Field

[0001] This application relates to the field of power supply detection technology, and in particular to a fault detection method, apparatus, equipment, system and storage medium. Background Technology

[0002] In three-phase power supply applications, such as variable frequency air conditioning systems, the three-phase power supply circuits typically include three-phase passive power factor correction (PFC) circuits, three-phase active PFC two-level circuits, and three-phase active PFC three-level circuit topologies. The main circuit of the three-phase power supply circuit can drive the variable frequency compressor, and one phase can be drawn from the three-phase power supply circuit for separate rectification to power the auxiliary power supply. Furthermore, it can also power the DC fan drive circuit. Currently, in three-phase power supply circuits, the nominal effective value of the three-phase line-to-line voltage is 380V, corresponding to a high-voltage DC bus voltage of 537V after rectification. However, in practical applications, a 10% allowable power supply voltage fluctuation error is typically tolerated, resulting in a maximum high-voltage DC bus voltage that can reach 590V.

[0003] The withstand voltage of the Intelligent Power Module (IPM) driving the DC fan is typically 500V or 600V. However, because IPM modules are usually designed with withstand voltage derating requirements, the input voltage of the DC fan IPM module is usually required to be below 450V. Therefore, if the neutral and live wires in a three-phase four-wire power supply are connected incorrectly, the auxiliary power supply and the DC fan's power supply may be connected to the line voltage. Since the DC voltage after rectification of the inter-line voltage is 1.732 times that after rectification of the phase voltage, this prolonged high voltage will cause overvoltage damage to the auxiliary power supply and the DC fan drive. Furthermore, if the neutral and live wires are connected incorrectly, the passive or active PFC circuit will malfunction, resulting in poor operating efficiency of the three-phase four-wire power supply equipment due to wiring errors.

[0004] Application content

[0005] To address the aforementioned technical problems, this application aims to provide a fault detection method, apparatus, device, system, and storage medium. This solves the problem of poor working efficiency caused by wiring errors in current three-phase four-wire power supply equipment (hereinafter referred to as three-phase power supply equipment). It realizes a method for effectively detecting wiring faults in advance, effectively ensuring the working efficiency of three-phase four-wire power supply equipment and improving the intelligence level of three-phase four-wire power supply equipment.

[0006] The technical solution of this application is implemented as follows:

[0007] In a first aspect, a fault detection method, the method comprising:

[0008] Identify the first target power line, the second target power line, and the third target power line in the three-phase power supply equipment; wherein, the three-phase power supply equipment is used to supply power to user electrical equipment;

[0009] Detect a first target voltage between the first target power line and the second target power line, and a second target voltage between the first target power line and the third target power line;

[0010] Based on the first target voltage and the second target voltage, a fault detection result is determined; wherein, the fault detection result is used to indicate whether a wiring error has occurred in the three-phase power supply equipment;

[0011] If the fault detection result indicates that the three-phase power supply equipment has a wiring error, a first prompt message is generated; wherein, the first prompt message is used to indicate that the three-phase power supply equipment has a wiring error.

[0012] Secondly, a fault detection device, the device comprising: a first determining unit, a detection unit, a second determining unit, and a generating unit; wherein:

[0013] The first determining unit is used to determine the first target power line, the second target power line, and the third target power line in the three-phase power supply equipment; wherein, the three-phase power supply equipment is used to supply power to user electrical equipment;

[0014] The detection unit is used to detect a first target voltage between the first target power line and the second target power line, and a second target voltage between the first target power line and the third target power line.

[0015] The second determining unit is used to determine a fault detection result based on the first target voltage and the second target voltage; wherein the fault detection result is used to indicate whether a wiring error has occurred in the three-phase power supply equipment;

[0016] The generation unit is used to generate a first prompt message if the fault detection result indicates that the three-phase power supply equipment has a wiring error; wherein the first prompt message is used to prompt that the three-phase power supply equipment has a wiring error.

[0017] Thirdly, a fault detection device, the device comprising: a detection circuit and a processor; wherein:

[0018] The detection circuit is used to connect to the first target power line, the second target power line, and the third target power line in the three-phase power supply equipment to detect the first target voltage between the first target power line and the second target power line, and the second target voltage between the first target power line and the third target power line, and to send the first target voltage and the second target voltage to the processor; wherein, the three-phase power supply equipment is used to supply power to user electrical equipment;

[0019] The processor is configured to receive the first target voltage and the second target voltage sent by the detection circuit, and determine a fault detection result based on the first target voltage and the second target voltage; wherein the fault detection result is used to indicate whether the three-phase power supply equipment has a wiring error; if the fault detection result indicates that the three-phase power supply equipment has a wiring error, a first prompt message is generated; wherein the first prompt message is used to prompt that the three-phase power supply equipment has a wiring error.

[0020] Fourthly, a three-phase power supply system, the three-phase power supply system comprising: a three-phase power supply device for providing three-phase power and a fault detection device as described above.

[0021] Fifthly, a storage medium storing a fault detection program, which, when executed by a processor, implements the steps of the fault detection method as described in any of the preceding claims.

[0022] In this embodiment, after determining the first target power line, second target power line, and third target power line in the three-phase power supply equipment, the first target voltage between the first target power line and the second target power line, and the second target voltage between the first target power line and the third target power line are detected. Based on the first target voltage and the second target voltage, a fault detection result is determined. If the fault detection result indicates a wiring error in the three-phase power supply equipment, a first prompt message is generated. Thus, by analyzing the first target voltage between the first target power line and the second target power line, and the second target voltage between the first target power line and the third target power line, it is determined whether a wiring error has occurred in the three-phase power supply equipment. This solves the problem of poor working efficiency in current three-phase four-wire power supply equipment due to wiring errors, realizing a method for effectively detecting wiring faults in advance, effectively ensuring the working efficiency of the three-phase four-wire power supply equipment, and improving the intelligence level of the three-phase four-wire power supply equipment. Attached Figure Description

[0023] Figure 1 Flowchart of the fault detection method provided in the embodiments of this application Figure 1 ;

[0024] Figure 2Flowchart of the fault detection method provided in the embodiments of this application Figure 2 ;

[0025] Figure 3 Flowchart of the fault detection method provided in the embodiments of this application Figure 3 ;

[0026] Figure 4 Flowchart of the fault detection method provided in the embodiments of this application Figure 4 ;

[0027] Figure 5a A circuit topology diagram of a three-phase passive PFC device provided in this application embodiment;

[0028] Figure 5b A circuit topology diagram of a three-phase active PFC two-level device provided in this application embodiment;

[0029] Figure 5c A circuit topology diagram of a three-phase active PFC three-level device provided in this application embodiment;

[0030] Figure 6 A schematic diagram illustrating the connection between a three-phase power supply device and a voltage detection device provided in an embodiment of this application;

[0031] Figure 7 This is a schematic diagram illustrating the connection between another three-phase power supply device and a voltage detection device provided in an embodiment of this application.

[0032] Figure 8a A schematic diagram of a circuit connection for detecting two line voltages is provided for an embodiment of this application;

[0033] Figure 8b A schematic diagram of a circuit connection for detecting two phase voltages is provided in an embodiment of this application;

[0034] Figure 9 A schematic diagram of a three-phase voltage vector provided in an embodiment of this application;

[0035] Figure 10a This application provides an embodiment of a V circuit where the live wire A and the neutral wire N are reversed. CN Calculation diagram;

[0036] Figure 10b This application provides an embodiment of a V circuit where the live wire B and the neutral wire N are reversed. CN Calculation diagram;

[0037] Figure 10c This application provides an embodiment of a V circuit where the live wire C and the neutral wire N are reversed. CN Calculation diagram;

[0038] Figure 11a A circuit connection diagram of a voltage detection device including three voltage detection circuits provided in an embodiment of this application;

[0039] Figure 11b A circuit connection diagram of another voltage detection device provided for an embodiment of this application includes three voltage detection circuits;

[0040] Figure 12 Flowchart 5 illustrates the fault detection method provided in this application embodiment;

[0041] Figure 13 Flowchart of the fault detection method provided in the embodiments of this application Figure 6 ;

[0042] Figure 14 A schematic diagram of a circuit connection for detecting a line voltage and a phase voltage, provided for an embodiment of this application;

[0043] Figure 15a Another embodiment of this application provides a V circuit where the live wire A and the neutral wire N are reversed. CN Calculation diagram;

[0044] Figure 15b Another embodiment of this application provides a V circuit where the live wire B and the neutral wire N are reversed. CN Calculation diagram;

[0045] Figure 15c Another embodiment of this application provides a V circuit where the live wire C and the neutral wire N are reversed. CN Calculation diagram;

[0046] Figure 16 This is a circuit connection diagram of a voltage detection circuit provided in an embodiment of this application;

[0047] Figure 17 This is a schematic diagram of the structure of a fault detection device provided in an embodiment of this application;

[0048] Figure 18 This is a schematic diagram of the structure of a fault detection device provided in an embodiment of this application;

[0049] Figure 19 This is a schematic diagram of a three-phase power supply system provided in an embodiment of this application. Detailed Implementation

[0050] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0051] The embodiments of this application provide a fault detection method, referring to... Figure 1As shown, the method is applied to a fault detection device, and the method includes the following steps:

[0052] Step 101: Determine the first target power line, the second target power line, and the third target power line in the three-phase power supply equipment.

[0053] Among them, three-phase power supply equipment is used to supply power to users' electrical equipment.

[0054] In this embodiment, the three-phase power supply equipment can be a three-phase four-wire power supply equipment for providing three-phase power, that is, the three-phase power supply equipment includes three live wires and one neutral wire. The three live wires and one neutral wire include a first target power line, a second target power line, and a third target power line.

[0055] Step 102: Detect the first target voltage between the first target power line and the second target power line, and the second target voltage between the first target power line and the third target power line.

[0056] In this embodiment of the application, a voltage detection device can be used to detect the first target voltage between the first target power line and the second target power line, and the second target voltage between the first target power line and the third target power line.

[0057] Step 103: Determine the fault detection result based on the first target voltage and the second target voltage.

[0058] The fault detection results are used to indicate whether there are wiring errors in the three-phase power supply equipment.

[0059] In this embodiment of the application, the first target voltage and the second target voltage are analyzed to determine whether the neutral wire is incorrectly connected when the three-phase power supply equipment supplies power to the user's electrical equipment.

[0060] Step 104: If the fault detection result indicates that there is a wiring error in the three-phase power supply equipment, generate the first prompt message.

[0061] The first message is used to indicate a wiring error in the three-phase power supply equipment.

[0062] In this embodiment, if the fault detection result indicates that there is no wiring error in the three-phase power supply equipment, the three-phase power supply equipment is controlled to provide normal operating power to the user's electrical equipment. If the fault detection result indicates that there is a wiring error in the three-phase power supply equipment, the three-phase power supply equipment is controlled to temporarily stop providing operating power to the user's electrical equipment, and a first prompt message indicating that there is a wiring error in the three-phase power supply equipment is generated. The generated first prompt message can be displayed in the display area corresponding to the fault detection equipment, or the generated first prompt message can be sent to a display device with a communication link with the fault detection equipment, such as a computer device or smart mobile terminal device, such as a mobile phone, of the management personnel monitoring the three-phase power supply equipment. In this way, an alarm is realized for the wiring error of the three-phase power supply equipment, ensuring the safety and quality of use of the user's electrical equipment.

[0063] In this embodiment, after determining the first target power line, second target power line, and third target power line in the three-phase power supply equipment, the first target voltage between the first target power line and the second target power line, and the second target voltage between the first target power line and the third target power line are detected. Based on the first target voltage and the second target voltage, a fault detection result is determined. If the fault detection result indicates a wiring error in the three-phase power supply equipment, a first prompt message is generated. Thus, by analyzing the first target voltage between the first target power line and the second target power line, and the second target voltage between the first target power line and the third target power line, it is determined whether a wiring error has occurred in the three-phase power supply equipment. This solves the problem of poor working efficiency in current three-phase four-wire power supply equipment due to wiring errors, realizing a method for effectively detecting wiring faults in advance, effectively ensuring the working efficiency of the three-phase four-wire power supply equipment, and improving the intelligence level of the three-phase four-wire power supply equipment.

[0064] Based on the foregoing embodiments, embodiments of this application provide a fault detection method, referring to... Figure 2 As shown, the method is applied to a fault detection device, and the method includes the following steps:

[0065] Step 201: Determine the first target power line, the second target power line, and the third target power line in the three-phase power supply equipment.

[0066] Among them, three-phase power supply equipment is used to supply power to users' electrical equipment.

[0067] In this embodiment, the voltage detection device may be pre-connected to the first target power line, the second target power line, and the third target power line in the three-phase power supply equipment. The voltage detection device may be part of a fault detection device or a separate device, but in either case, the fault detection device can manage and control the voltage detection device.

[0068] Step 202: Detect the first target voltage between the first target power line and the second target power line, and the second target voltage between the first target power line and the third target power line.

[0069] In this embodiment, the fault detection device controls a voltage detection device to detect a first target voltage between a first target power line and a second target power line, and a second target voltage between the first target power line and a third target power line. The first and second target voltages can be obtained by using two voltage detection devices.

[0070] It should be noted that in some application scenarios, if cost is not a concern, at least two voltage detection devices can be installed on the three-phase four-wire of a three-phase power supply to detect the voltage between any two power lines. In the actual analysis of requirements, the first target voltage between the first and second target power lines, and the second target voltage between the first and third target power lines are obtained for subsequent analysis.

[0071] Step 203: Based on the first target voltage and the second target voltage, determine the third target voltage between the second target power line and the third target power line.

[0072] Both the first target voltage and the second target voltage are line voltages or phase voltages.

[0073] In this embodiment of the application, the first target voltage and the second target voltage are analyzed and processed according to the relationship between the three-phase four-wire voltages to determine the third target voltage between the second target power line and the third target power line.

[0074] Step 204: Determine the fault detection result based on the first target voltage, the second target voltage, and the third target voltage.

[0075] The fault detection results are used to indicate whether there are wiring errors in the three-phase power supply equipment.

[0076] In this embodiment of the application, the first target voltage, the second target voltage, and the third target voltage are analyzed to determine whether the three-phase power supply equipment has a wiring error fault result.

[0077] Step 205: If the fault detection result indicates that there is a wiring error in the three-phase power supply equipment, generate the first prompt message.

[0078] The first message is used to indicate a wiring error in the three-phase power supply equipment.

[0079] In this embodiment of the application, when the fault detection result indicates that a wiring error has occurred in the three-phase power supply equipment, a first prompt message is generated and displayed.

[0080] Based on the foregoing embodiments, in other embodiments of this application, step 203 can be implemented by steps 203a to 203b:

[0081] Step 203a: Determine the target and value of the first target voltage and the second target voltage.

[0082] In this embodiment of the application, the sum of the first target voltage and the second target voltage is calculated to obtain the target sum value.

[0083] Step 203b: Determine the negative value of the target and the value to obtain the third target voltage.

[0084] In this embodiment of the application, the target sum is negative to obtain the third target voltage.

[0085] Based on the foregoing embodiments, in other embodiments of this application, step 204 can be implemented by steps 204a to 204c:

[0086] Step 204a: Determine the first effective voltage value corresponding to the first target voltage, the second effective voltage value corresponding to the second target voltage, and the third effective voltage value corresponding to the third target voltage.

[0087] In this embodiment, when the heating effect of alternating current (AC) is equal to that of direct current (DC) at a certain voltage, the voltage of the DC can be considered the effective value of the AC voltage. The effective value of the corresponding voltage can be determined by the formula... The calculation yields u(t), where u(t) is the first or second target voltage signal, T is the voltage change period, and ∫ is the integration operator. Ideally, taking a sinusoidal voltage signal as an example of a three-phase power supply target voltage signal, the corresponding effective voltage value can be calculated by dividing the peak value of the sinusoidal voltage signal by the square root of 2.

[0088] Step 204b: Determine the first maximum effective value and the first minimum effective value from the first effective voltage value, the second effective voltage value, and the third effective voltage value.

[0089] Step 204c: Determine the fault detection result based on the first maximum effective value and the first minimum effective value.

[0090] Based on the foregoing embodiments, in other embodiments of this application, step 204c can be implemented by steps a11 to a12:

[0091] Step a11: Determine the first ratio between the first maximum effective value and the first minimum effective value.

[0092] In the embodiments of this application, the first ratio = the first maximum effective value / the first minimum effective value.

[0093] Step a12: If the first ratio is greater than or equal to the first threshold, the fault detection result is determined to be a wiring error in the three-phase power supply equipment.

[0094] In this embodiment, the first threshold is an empirical value obtained from a large number of implementations. The first threshold is greater than 1 and less than or equal to 1. Among them, symbols The square root sign is used. Furthermore, the first threshold is greater than or equal to 1.1 and less than or equal to 1.7.

[0095] Based on the foregoing embodiments, in other embodiments of this application, when both the first target voltage and the second target voltage are line voltages, refer to Figure 3 As shown, after executing step 204, the fault detection device is also used to execute steps 206 to 207:

[0096] Step 206: If the fault detection result indicates that there is a wiring error in the three-phase power supply equipment, determine that the first target live wire, other than the two live wires corresponding to the first maximum effective value, is connected incorrectly to the neutral wire in the three-phase power supply equipment.

[0097] In this embodiment of the application, since the line voltage is the voltage between two live wires, the first target live wire outside the two live wires corresponding to the first maximum effective value can be determined.

[0098] Step 207: Generate a second prompt message to indicate that the live wire and neutral wire of the first target are connected incorrectly.

[0099] It should be noted that step 207 can be executed simultaneously with step 205, or step 205 can be executed after step 207. This way, the user can be accurately notified that the first target live wire and neutral wire are connected incorrectly, so that the user can quickly correct the connection.

[0100] Based on the foregoing embodiments, in other embodiments of this application, when both the first target voltage and the second target voltage are phase voltages, refer to Figure 4 As shown, after executing step 204, the fault detection device is also used to execute steps 208-209 or steps 210-211. Specifically, if the fault detection result indicates a wiring error in the three-phase power supply equipment, and the first ratio is within a first preset threshold range, steps 208-209 are executed; if the fault detection result indicates a wiring error in the three-phase power supply equipment, and the first ratio is within a second preset threshold range, steps 210-211 are executed.

[0101] Step 208: If the fault detection result indicates that there is a wiring error in the three-phase power supply equipment, and the first ratio is within the first preset threshold range, determine that the second target live wire corresponding to the first minimum effective value is incorrectly connected to the neutral wire in the three-phase power supply equipment.

[0102] In this embodiment, the first preset threshold range is a preset threshold range determined empirically, and the first preset threshold range can be denoted as: The first preset threshold range includes and Since phase voltage is the voltage between the live wire and the neutral wire, and both the first and second target voltages are phase voltages, the calculated third target voltage is also a phase voltage. Therefore, when determining the first minimum effective value from the first, second, and third target voltages, the second target live wire corresponding to the first minimum effective value can be identified. At this point, it can be determined that the second target live wire is incorrectly connected to the neutral wire in the three-phase power supply equipment.

[0103] Step 209: Generate a third prompt message to indicate that the live wire and neutral wire of the second target are connected incorrectly.

[0104] In the embodiments of this application, step 209 can be executed simultaneously with step 205, or it can be executed after step 205.

[0105] Step 210: If the fault detection result indicates that there is a wiring error in the three-phase power supply equipment, and the first ratio is within the second preset threshold range, determine that the third target live wire corresponding to the first maximum effective value is incorrectly connected to the neutral wire in the three-phase power supply equipment.

[0106] Wherein, the minimum value in the first preset threshold range is greater than or equal to the maximum value in the second preset threshold range.

[0107] In this embodiment, the second preset threshold range is a preset threshold range determined based on experience, and the second preset threshold range can be denoted as... The second preset threshold range includes 1 and

[0108] Step 211: Generate a fourth prompt message to indicate that the live wire and neutral wire of the third target are connected incorrectly.

[0109] In this embodiment of the application, step 211 can be executed simultaneously with step 205, or it can be executed after step 205.

[0110] For example, assuming the user's electrical equipment is a variable frequency compressor, the circuit topology of a three-phase passive PFC device, including a main circuit driving the variable frequency compressor, an auxiliary circuit for separately rectifying and supplying power to the auxiliary power supply, and powering the DC fan drive circuit, can be referred to... Figure 5a The circuit topology of a three-phase active PFC two-level device, including a main circuit driving a variable frequency compressor and an auxiliary circuit used for separate rectification to power the auxiliary power supply and the DC fan drive circuit, can be referenced. Figure 5bThe circuit topology of a three-phase active PFC three-level device, including a main circuit driving a variable frequency compressor and an auxiliary circuit used for separate rectification to power the auxiliary power supply and the DC fan drive circuit, can be referenced. Figure 5c As shown.

[0111] Reference Figure 6 or Figure 7 The diagram shows the connection between the three-phase power supply device E and the voltage detection device F. The power output terminal of the three-phase power supply device E is electrically connected to the user power supply device G. Specifically, in... Figure 6 and Figure 7 In the three-phase power supply device E, there are: AC mains power supply E1, three resistors L1, L2, and L3 installed on the three live wires A, B, and C, and a neutral wire N; the voltage detection device F includes a voltage detection circuit and a processor. Among these, in... Figure 6 The medium voltage detection device F is installed at the current input terminals of the three resistors L1, L2, and L3. Figure 7 The medium voltage detection device F is set on the current output side of the three resistors L1, L2 and L3.

[0112] in, Figure 6 and Figure 7 The voltage detection circuit in the circuit is used to detect the analog voltage between the two voltage lines that need to be detected, and then sends the detected analog voltage to the processor. Figure 6 and Figure 7 The processor in the code performs the following three steps: F21, converting the received analog voltage to an analog-to-digital (A / D) converter to obtain a numerical voltage value; F22, performing a power supply wiring fault diagnosis analysis on the numerical voltage value to obtain a fault detection result; and F23, generating a corresponding prompt message based on the fault detection result. In some application scenarios, the processor can be a microcontroller.

[0113] based on Figure 6 The connection method between the three-phase power supply equipment E and the voltage detection device F shown is illustrated in the diagram. For a specific connection diagram when the voltage detection device F includes two voltage detection circuits, please refer to [reference needed]. Figures 8a-8b As shown. Among them, Figure 8a A schematic diagram of the voltage detection circuit for detecting two line voltages. Figure 8b A schematic diagram of the voltage detection circuit connection for detecting two phase voltages.

[0114] pass Figure 8a The voltage detection circuit connection diagram shown detects the voltage V between live wire A and live wire B. BA The voltage V between live wire B and live wire C CB Then, through formula V AC =-(V BA+V CB The line voltage V between live wire A and live wire C can be calculated. AC Then, based on the voltage V BA Voltage V CB and voltage V AC Determine if there is an incorrect neutral wire connection in the input wiring. The specific process for determining if there is an incorrect neutral wire connection in the input wiring is as follows: Calculate the voltage V. BA Voltage V CB and voltage V AC The three correspond to the effective voltage values ​​U respectively. BA U CB and U AC From the effective value of voltage U BA U CB and U AC The maximum effective voltage value U is determined in the middle. max and minimum effective voltage U min ; through the formula k = U max / U min Calculate the ratio k between the maximum effective voltage value and the minimum effective voltage value; determine the relationship between k and the threshold K, where K takes a range of values. The preferred value range for K is [1.1, 1.7]; if k is greater than K, the neutral wire is determined to be incorrectly connected. Furthermore, if the neutral wire is determined to be incorrectly connected, it can also be determined that the third phase wire other than the two wires corresponding to the maximum effective voltage value is reversed with the neutral wire N. For example, assuming the maximum effective voltage value is U... BA At this time, it can be determined that live wire C, other than live wire A and live wire B, is reversed with the neutral wire.

[0115] After detecting two line voltages, Vm is denoted as the voltage vector magnitude. The voltage vector calculation method for the corresponding other line voltage can be found in Table 1.

[0116] Table 1

[0117]

[0118] pass Figure 8b The voltage detection circuit connection diagram shown detects the phase voltage V between the live wire A and the neutral wire N. AN The phase voltage V between live wire B and neutral wire N BN Then, through formula V CN =-(V AN +V BN The phase voltage V between the live wire C and the neutral wire N can be calculated. CN Then, based on the voltage V AN Voltage V BN and voltage V CNDetermine if there is an incorrect neutral wire connection in the input wiring. The specific process for determining if there is an incorrect neutral wire connection in the input wiring is as follows: Calculate the voltage V. AN Voltage V BN and voltage V CN The three correspond to the effective voltage values ​​U respectively. AN U BN and U CN From the effective value of voltage U AN U BN and U CN The maximum effective voltage value U is determined in the middle. max and minimum effective voltage U min ; through the formula k = U max / U min Calculate the ratio k between the maximum effective voltage value and the minimum effective voltage value; determine the relationship between k and the threshold K, where K takes a range of values. The preferred value range for K is [1.1, 1.7]; if k is greater than K, the neutral wire is incorrectly connected. Furthermore, if... It can be determined that the live wire and neutral wire are reversed in the minimum effective voltage value. For example, suppose U min =U CN If so, it can be determined that the live wire C and the neutral wire N are connected incorrectly; if It can be determined that the maximum effective voltage value includes the live wire and neutral wire being reversed. For example, if U max =U BN If this is confirmed, then it can be determined that the live wire B and the neutral wire N are connected incorrectly. A schematic diagram of the voltage vector between the live wires A, B, and C and the neutral wire N in a three-phase four-wire system can be found by referring to... Figure 9 As shown. In this application scenario, the voltage V is affected when the live wire A and the neutral wire N are reversed. CN The calculation diagram can be referred to as follows: Figure 10a As shown, V is the result of reversing the connection of the live wire B and the neutral wire N. CN The calculation diagram can be referred to as follows: Figure 10b As shown, V is the result of reversing the connection of the live wire C and the neutral wire N. CN The calculation diagram can be referred to as follows: Figure 10c As shown.

[0119] After detecting two phase voltages, Vm is denoted as the voltage vector magnitude. The calculation method for the voltage vector of the other phase voltage can be found in Table 2.

[0120] Table 2

[0121]

[0122] based on Figure 6The connection method between the three-phase power supply equipment E and the voltage detection device F shown is illustrated in the diagram. For a specific connection diagram when the voltage detection device F includes three voltage detection circuits, please refer to [reference needed]. Figures 11a-11b As shown. In practical applications, only two of the voltage detection circuits used to acquire two line voltages or two phase voltages can be activated. Alternatively, two voltage detection circuits connected to the same live wire can be activated, one for acquiring one phase voltage and the other for acquiring one line voltage.

[0123] It should be noted that the descriptions of the same steps and contents as in other embodiments in this embodiment can be found in the descriptions in other embodiments, and will not be repeated here.

[0124] In this embodiment, after determining the first target power line, second target power line, and third target power line in the three-phase power supply equipment, the first target voltage between the first target power line and the second target power line, and the second target voltage between the first target power line and the third target power line are detected. Based on the first target voltage and the second target voltage, a fault detection result is determined. If the fault detection result indicates a wiring error in the three-phase power supply equipment, a first prompt message is generated. Thus, by analyzing the first target voltage between the first target power line and the second target power line, and the second target voltage between the first target power line and the third target power line, it is determined whether a wiring error has occurred in the three-phase power supply equipment. This solves the problem of poor working efficiency in current three-phase four-wire power supply equipment due to wiring errors, realizing a method for effectively detecting wiring faults in advance, effectively ensuring the working efficiency of the three-phase four-wire power supply equipment, and improving the intelligence level of the three-phase four-wire power supply equipment.

[0125] Based on the foregoing embodiments, embodiments of this application provide a fault detection method. When the first target power line and the second target power line are live wires in a three-phase power supply device, and the third target power line is the neutral wire in a three-phase power supply device, refer to... Figure 12 As shown, the method is applied to a fault detection device, and the method includes the following steps:

[0126] Step 301: Determine the first target power line, the second target power line, and the third target power line in the three-phase power supply equipment.

[0127] Among them, three-phase power supply equipment is used to supply power to users' electrical equipment.

[0128] Step 302: Detect the first target voltage between the first target power line and the second target power line, and the second target voltage between the first target power line and the third target power line.

[0129] In this embodiment, the detection of the first target voltage and the second target voltage is performed on the same live wire, namely the first target power line. In this case, the first target voltage is the line voltage, and the second target voltage is the phase voltage.

[0130] Step 303: Based on the first target voltage and the second target voltage, determine the fourth target voltage between the second target power line and the third target power line, and the fifth target voltage between the fourth target power line and the third target power line in the three-phase power supply equipment.

[0131] In the embodiments of this application, the calculated fourth target voltage and fifth target voltage are phase voltages.

[0132] Step 304: Determine the fault detection result based on the second target voltage, the fourth target voltage, and the fifth target voltage.

[0133] The fault detection results are used to indicate whether there are wiring errors in the three-phase power supply equipment.

[0134] In this embodiment of the application, the three phase voltages are analyzed to determine the fault detection result.

[0135] Step 305: If the fault detection result indicates that there is a wiring error in the three-phase power supply equipment, generate the first prompt message.

[0136] The first message is used to indicate a wiring error in the three-phase power supply equipment.

[0137] Based on the foregoing embodiments, in other embodiments of this application, step 303 can be implemented by steps 303a to 303c:

[0138] Step 303a: Determine the difference between the second target voltage and the first target voltage to obtain the fourth target voltage.

[0139] Step 303b: Determine the product of the second target voltage and the target voltage 2.

[0140] Step 303c: Determine the difference between the first target voltage and the target product to obtain the fifth target voltage.

[0141] In this embodiment, the fifth target voltage = the first target voltage - the target product = the first target voltage - 2 * the second target voltage.

[0142] Based on the foregoing embodiments, in other embodiments of this application, step 304 can be implemented by steps 304a to 304c:

[0143] Step 304a: Determine the effective value of the second voltage corresponding to the second target voltage, the effective value of the fourth voltage corresponding to the fourth target voltage, and the effective value of the fifth voltage corresponding to the fifth target voltage.

[0144] Step 304b: Determine the second maximum effective value and the second minimum effective value from the second effective value, the fourth effective value, and the fifth effective value.

[0145] Step 304c: Determine the fault detection result based on the second maximum effective value and the second minimum effective value.

[0146] Based on the foregoing embodiments, in other embodiments of this application, step 304c can be implemented by steps b11 to b12:

[0147] Step b11: Determine the second ratio between the second maximum effective value and the second minimum effective value.

[0148] In the embodiments of this application, the second ratio = the second maximum effective value / the second minimum effective value.

[0149] Step b12: If the second ratio is greater than or equal to the second threshold, the fault detection result is determined to be a wiring error in the three-phase power supply equipment.

[0150] In this embodiment, the second threshold may be the same as or different from the first threshold. The second threshold is greater than 1, less than or equal to 1. Among them, symbols The value is a square root. Furthermore, the second threshold is greater than or equal to 1.1 and less than or equal to 1.7.

[0151] Based on the foregoing embodiments, in other embodiments of this application, reference is made to... Figure 13 As shown, after executing step 304, the fault detection device is also used to execute steps 306-307 or steps 308-309; wherein, if the fault detection result indicates that the three-phase power supply equipment has a wiring error and the second ratio is within the range of the third preset threshold, steps 306-307 are selected to be executed; if the fault detection result indicates that the three-phase power supply equipment has a wiring error and the second ratio is within the range of the fourth preset threshold, steps 308-309 are selected to be executed.

[0152] Step 306: If the fault detection result indicates that there is a wiring error in the three-phase power supply equipment, and the second ratio is within the range of the third preset threshold, determine that the fourth target live wire corresponding to the second minimum effective value is incorrectly connected to the neutral wire in the three-phase power supply equipment.

[0153] The third preset threshold range is: to The range of the third preset threshold does not include... The third preset threshold range includes

[0154] Step 307: Generate a fifth prompt message to indicate that the live wire and neutral wire of the fourth target are connected incorrectly.

[0155] Step 308: If the fault detection result indicates that there is a wiring error in the three-phase power supply equipment, and the second ratio is within the range of the fourth preset threshold, determine that the fifth target live wire corresponding to the second maximum effective value is incorrectly connected to the neutral wire in the three-phase power supply equipment.

[0156] The fourth preset threshold ranges from 1 to... The range of the fourth preset threshold does not include 1, and the fourth preset threshold includes...

[0157] Step 309: Generate a sixth prompt message to indicate that the live wire and neutral wire of the fifth target are connected incorrectly.

[0158] based on Figure 6 The connection method between the three-phase power supply equipment E and the voltage detection device F shown is illustrated in the diagram. For a specific connection diagram when the voltage detection device F includes two voltage detection circuits, please refer to [reference needed]. Figure 14 As shown, a voltage detection circuit is used to detect the first target voltage between the shared live wire A and live wire B, and the line voltage V is obtained. AB A voltage detection circuit is used to detect the second target voltage between the shared live wire A and neutral wire N, and the phase voltage V is obtained. AN Taking the example of V, we can explain it using the formula. BN =V AN -V AB Calculate the phase voltage V between live wire B and neutral wire N. BN Through formula V CN =V AB -2V AN The phase voltage V between the live wire C and the neutral wire N is calculated. CN Then determine the phase voltage V respectively. AN Phase voltage V BN and phase voltage V CN The effective value of voltage U at the same moment AN U BN and U CN Finally, based on the effective voltage value U AN U BN and U CN Determine if the neutral wire is incorrectly connected in the input wiring. This is based on the effective voltage value U. AN U BN and U CN Determining whether the input line wiring has a neutral wire connection error includes the following steps: From the effective voltage value U... AN U BN and U CN Determine the maximum effective voltage value Umax and minimum effective voltage U min ; through the formula k = U max / U min Calculate the ratio k between the maximum effective voltage value and the minimum effective voltage value; determine the relationship between k and the threshold K, where K takes a range of values. The preferred value range for K is [1.1, 1.7]; if k is greater than K, the neutral wire is incorrectly connected. Furthermore, if... It can be determined that the live wire and neutral wire are reversed in the minimum effective voltage value. For example, suppose U min =U AN If so, it can be determined that the live wire A and the neutral wire N are connected incorrectly; if It can be determined that the maximum effective voltage value includes the live wire and neutral wire being reversed. For example, if U max =U CN This confirms that the live wire C and the neutral wire N are connected incorrectly. In this application scenario, the reversed connection of live wire A and neutral wire N results in V... CN The calculation diagram can be referred to Figure 15a As shown, V is the result of reversing the connection of the live wire B and the neutral wire N. CN The calculation diagram can be referred to Figure 15b As shown, V is the result of reversing the connection of the live wire C and the neutral wire N. CN The calculation diagram can be referred to Figure 15c As shown.

[0159] It should be noted that the aforementioned Figure 6 , Figure 7 , Figures 8a-8b , Figures 11a-11b , Figure 14 The voltage detection circuit in the reference can be found here. Figure 16 As shown, it includes: resistors R1, R2, R3 and R4, operational amplifier Y, DC power supply DC, GND is the ground terminal, the two terminals where R1 and R2 are located are the voltage input terminals of the voltage detection circuit, and the output terminal of operational amplifier Y is the output terminal of the voltage detection circuit.

[0160] It should be noted that the descriptions of the same steps and contents as in other embodiments in this embodiment can be found in the descriptions in other embodiments, and will not be repeated here.

[0161] In this embodiment, after determining the first target power line, second target power line, and third target power line in the three-phase power supply equipment, the first target voltage between the first target power line and the second target power line, and the second target voltage between the first target power line and the third target power line are detected. Based on the first target voltage and the second target voltage, a fault detection result is determined. If the fault detection result indicates a wiring error in the three-phase power supply equipment, a first prompt message is generated. Thus, by analyzing the first target voltage between the first target power line and the second target power line, and the second target voltage between the first target power line and the third target power line, it is determined whether a wiring error has occurred in the three-phase power supply equipment. This solves the problem of poor working efficiency in current three-phase four-wire power supply equipment due to wiring errors, realizing a method for effectively detecting wiring faults in advance, effectively ensuring the working efficiency of the three-phase four-wire power supply equipment, and improving the intelligence level of the three-phase four-wire power supply equipment.

[0162] Based on the foregoing embodiments, embodiments of this application provide a fault detection device, referring to... Figure 17 As shown, the fault detection device 4 may include: a first determining unit 41, a detection unit 42, a second determining unit 43, and a generating unit 44; wherein:

[0163] The first determining unit 41 is used to determine the first target power line, the second target power line, and the third target power line in the three-phase power supply equipment; wherein, the three-phase power supply equipment is used to supply power to the user's electrical equipment;

[0164] Detection unit 42 is used to detect the first target voltage between the first target power line and the second target power line, and the second target voltage between the first target power line and the third target power line;

[0165] The second determining unit 43 is used to determine the fault detection result based on the first target voltage and the second target voltage; wherein the fault detection result is used to indicate whether there is a wiring error in the three-phase power supply equipment;

[0166] The generation unit 44 is used to generate a first prompt message if the fault detection result indicates that a wiring error has occurred in the three-phase power supply equipment; wherein, the first prompt message is used to indicate that a wiring error has occurred in the three-phase power supply equipment.

[0167] In other embodiments of this application, the second determining unit includes: a first determining module and a second determining module, wherein:

[0168] The first determining module is used to determine a third target voltage between the second target power line and the third target power line based on the first target voltage and the second target voltage; wherein the first target voltage and the second target voltage are both line voltages or phase voltages;

[0169] The second determining module is used to determine the fault detection result based on the first target voltage, the second target voltage, and the third target voltage.

[0170] In other embodiments of this application, the first determining module may specifically be used to implement the following steps:

[0171] Determine the target voltage and the value of the first target voltage and the second target voltage;

[0172] By determining the negative value of the target and the value, the third target voltage is obtained.

[0173] In other embodiments of this application, the second determining module may specifically be used to implement the following steps:

[0174] Determine the first effective voltage value corresponding to the first target voltage, the second effective voltage value corresponding to the second target voltage, and the third effective voltage value corresponding to the third target voltage;

[0175] Determine the first maximum effective value and the first minimum effective value from the first effective value, the second effective value, and the third effective value of the voltage;

[0176] The fault detection result is determined based on the first maximum effective value and the first minimum effective value.

[0177] In other embodiments of this application, when the second determining module is used to determine the fault detection result based on the first maximum effective value and the first minimum effective value, it can be implemented through the following steps:

[0178] Determine a first ratio between the first maximum effective value and the first minimum effective value;

[0179] If the first ratio is greater than or equal to the first threshold, the fault detection result is determined to be a wiring error in the three-phase power supply equipment; wherein, the first threshold is greater than 1 and less than or equal to 1.

[0180] In other embodiments of this application, both the first target voltage and the second target voltage are line voltages. After the second determining unit performs the steps based on the first target voltage and the second target voltage to determine the fault detection result, the second determining unit is further configured to determine, if the fault detection result indicates a wiring error in the three-phase power supply equipment, that the first target live wire, excluding the two live wires corresponding to the first maximum effective value, is incorrectly connected to the neutral wire in the three-phase power supply equipment; wherein, the first preset threshold range is... to The range, the first preset threshold range does not include The first preset threshold range includes

[0181] The generation unit is also used to generate a second prompt message to indicate that the live wire and neutral wire of the first target are connected incorrectly.

[0182] In other embodiments of this application, the first target voltage and the second target voltage are both phase voltages. After the second determining unit performs the steps based on the first target voltage and the second target voltage to determine the fault detection result, the second determining unit is further configured to determine that if the fault detection result indicates that the three-phase power supply equipment has a wiring error and the first ratio is within the first preset threshold range, the second target live wire corresponding to the first minimum effective value is incorrectly connected to the neutral wire in the three-phase power supply equipment.

[0183] The generation unit is also used to generate a third prompt message to indicate that the live wire and neutral wire of the second target are connected incorrectly;

[0184] The second determining unit is further configured to, if the fault detection result indicates a wiring error in the three-phase power supply equipment and the first ratio is within the range of the second preset threshold, determine that the third target live wire corresponding to the first maximum effective value is incorrectly connected to the neutral wire in the three-phase power supply equipment; wherein, the range of the second preset threshold is 1 to... The range of the second preset threshold does not include 1, and the range of the second preset threshold includes...

[0185] The generation unit is also used to generate a fourth prompt message to indicate that the live wire and neutral wire of the third target are connected incorrectly.

[0186] In other embodiments of this application, the first target power line and the second target power line are the live wires in a three-phase power supply device, and the third target power line is the neutral wire in a three-phase power supply device. The second determining unit includes: a first determining module and a second determining module, wherein:

[0187] The first determining module is also used to determine, based on the first target voltage and the second target voltage, a fourth target voltage between the second target power line and the third target power line, and a fifth target voltage between the fourth target power line and the third target power line in the three-phase power supply equipment;

[0188] The second determining module is also used to determine the fault detection result based on the second target voltage, the fourth target voltage, and the fifth target voltage.

[0189] In other embodiments of this application, when the first determining module is used to determine the fourth target voltage between the second target power line and the third target power line based on the first target voltage and the second target voltage, and the fifth target voltage between the fourth target power line and the third target power line in the three-phase power supply equipment, it can be achieved through the following steps:

[0190] The difference between the second target voltage and the first target voltage is determined to obtain the fourth target voltage;

[0191] Determine the product of the second target voltage and the target voltage of 2;

[0192] The difference between the first target voltage and the target product is determined to obtain the fifth target voltage.

[0193] In other embodiments of this application, the second determining module is used to determine the fault detection result based on the second target voltage, the fourth target voltage, and the fifth target voltage, which can be achieved through the following steps:

[0194] Determine the effective value of the second voltage corresponding to the second target voltage, the effective value of the fourth voltage corresponding to the fourth target voltage, and the effective value of the fifth voltage corresponding to the fifth target voltage;

[0195] Determine the second maximum effective value and the second minimum effective value from the second effective value, the fourth effective value, and the fifth effective value;

[0196] The fault detection result is determined based on the second maximum effective value and the second minimum effective value.

[0197] In other embodiments of this application, when the second determining module is used to determine the fault detection result based on the second maximum effective value and the second minimum effective value, it can be implemented through the following steps:

[0198] Determine a second ratio between the second maximum effective value and the second minimum effective value;

[0199] If the second ratio is greater than or equal to the second threshold, the fault detection result is determined to be a wiring error in the three-phase power supply equipment; wherein, the second threshold is greater than 1 and less than or equal to 1.

[0200] In other embodiments of this application, after the second determining unit performs the step of determining the fault detection result based on the first target voltage and the second target voltage, the second determining unit is further configured to determine that if the fault detection result indicates a wiring error in the three-phase power supply equipment, and the second ratio is within the range of the third preset threshold, the fourth target live wire corresponding to the second minimum effective value is incorrectly connected to the neutral wire in the three-phase power supply equipment; wherein, the third preset threshold range is... to The range of the third preset threshold does not include... The third preset threshold range includes

[0201] The generation unit is also used to generate a fifth prompt message to indicate that the live wire and neutral wire of the fourth target are connected incorrectly;

[0202] The second determining unit is further configured to, if the fault detection result indicates a wiring error in the three-phase power supply equipment and the second ratio is within the range of the fourth preset threshold, determine that the fifth target live wire corresponding to the second maximum effective value is incorrectly connected to the neutral wire in the three-phase power supply equipment; wherein, the range of the fourth preset threshold is 1 to... The range of the fourth preset threshold does not include 1, and the fourth preset threshold includes...

[0203] The generation unit is also used to generate a sixth prompt message to indicate that the live wire and neutral wire of the fifth target are connected incorrectly.

[0204] The fault detection device is the same device as the aforementioned voltage detection device.

[0205] It should be noted that the specific implementation process of information interaction between units and modules in this embodiment can be referred to Figures 1-4 and Figures 12-13 The implementation process of the fault detection method provided in the corresponding embodiment will not be described in detail here.

[0206] In this embodiment, after determining the first target power line, second target power line, and third target power line in the three-phase power supply equipment, the first target voltage between the first target power line and the second target power line, and the second target voltage between the first target power line and the third target power line are detected. Based on the first target voltage and the second target voltage, a fault detection result is determined. If the fault detection result indicates a wiring error in the three-phase power supply equipment, a first prompt message is generated. Thus, by analyzing the first target voltage between the first target power line and the second target power line, and the second target voltage between the first target power line and the third target power line, it is determined whether a wiring error has occurred in the three-phase power supply equipment. This solves the problem of poor working efficiency in current three-phase four-wire power supply equipment due to wiring errors, realizing a method for effectively detecting wiring faults in advance, effectively ensuring the working efficiency of the three-phase four-wire power supply equipment, and improving the intelligence level of the three-phase four-wire power supply equipment.

[0207] Based on the foregoing embodiments, embodiments of this application provide a fault detection device, referring to... Figure 18 As shown, the fault detection device 5 may include: a detection circuit 51 and a processor 52; wherein:

[0208] The detection circuit 51 is used to connect to the first target power line, the second target power line, and the third target power line in the three-phase power supply equipment to detect the first target voltage between the first target power line and the second target power line, and the second target voltage between the first target power line and the third target power line, and to send the first target voltage and the second target voltage to the processor; wherein, the three-phase power supply equipment is used to supply power to user electrical equipment;

[0209] The processor 52 is configured to receive the first target voltage and the second target voltage sent by the detection circuit, and determine a fault detection result based on the first target voltage and the second target voltage; wherein the fault detection result is used to indicate whether the three-phase power supply equipment has a wiring error; if the fault detection result indicates that the three-phase power supply equipment has a wiring error, a first prompt message is generated; wherein the first prompt message is used to prompt that the three-phase power supply equipment has a wiring error.

[0210] In other embodiments of this application, the specific implementation process of processor 52 can be referred to Figures 1-4 and Figures 12-13 The implementation process of the method shown will not be described in detail here. It should be noted that the detection circuit is the voltage detection circuit mentioned above.

[0211] Based on the foregoing embodiments, embodiments of this application provide a three-phase power supply system, referring to... Figure 19 As shown, the three-phase power supply system 6 may include: a three-phase power supply device 61 for providing three-phase power and a device for implementing... Figures 1-4 and Figures 12-13 The fault detection method includes a fault detection device 62; wherein the specific implementation process of the fault detection device 62 can be referred to Figures 1-4 and Figures 12-13 The implementation process of the method shown will not be described in detail here. Also, the three-phase power supply device 61 here is the same device as the aforementioned three-phase power supply device E.

[0212] Based on the foregoing embodiments, embodiments of this application provide a computer-readable storage medium, simply referred to as a storage medium, which stores one or more programs that can be executed by one or more processors to achieve, as follows: Figures 1-4 and Figures 12-13 The implementation process of the fault detection method provided in the corresponding embodiment will not be described in detail here.

[0213] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of hardware embodiments, software embodiments, or embodiments combining software and hardware aspects. Furthermore, this application can take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage and optical storage) containing computer-usable program code.

[0214] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0215] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0216] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0217] The above description is merely a preferred embodiment of this application and is not intended to limit the scope of protection of this application.

Claims

1. A fault detection method, characterized in that, The method includes: Identify the first target power line, the second target power line, and the third target power line in the three-phase power supply equipment; wherein, the three-phase power supply equipment is used to supply power to user electrical equipment; Detect a first target voltage between the first target power line and the second target power line, and a second target voltage between the first target power line and the third target power line; Based on the first target voltage and the second target voltage, a fault detection result is determined; wherein, the fault detection result is used to indicate whether a wiring error has occurred in the three-phase power supply equipment; If the fault detection result indicates that the three-phase power supply equipment has a wiring error, a first prompt message is generated; wherein, the first prompt message is used to indicate that the three-phase power supply equipment has a wiring error; The step of determining the fault detection result based on the first target voltage and the second target voltage includes: Based on the first target voltage and the second target voltage, a third target voltage is determined between the second target power line and the third target power line; wherein, the first target voltage and the second target voltage are both line voltages or phase voltages; The fault detection result is determined based on the first target voltage, the second target voltage, and the third target voltage; The step of determining the fault detection result based on the first target voltage, the second target voltage, and the third target voltage includes: Determine the first effective voltage value corresponding to the first target voltage, the second effective voltage value corresponding to the second target voltage, and the third effective voltage value corresponding to the third target voltage; Determine the first maximum effective value and the first minimum effective value from the first effective voltage value, the second effective voltage value, and the third effective voltage value; The fault detection result is determined based on the first maximum effective value and the first minimum effective value; The step of determining the fault detection result based on the first maximum effective value and the first minimum effective value includes: Determine a first ratio between the first maximum effective value and the first minimum effective value; If the first ratio is greater than or equal to the first threshold, the fault detection result is determined to be a wiring error in the three-phase power supply equipment.

2. The method according to claim 1, characterized in that, The step of determining the third target voltage between the second target power line and the third target power line based on the first target voltage and the second target voltage includes: Determine the target sum and value of the first target voltage and the second target voltage; The negative value of the target and the value are determined to obtain the third target voltage.

3. The method according to claim 1, characterized in that, The first threshold is greater than 1 and less than or equal to 1.

4. The method according to claim 3, characterized in that, Both the first target voltage and the second target voltage are line voltages. After determining the fault detection result based on the first target voltage and the second target voltage, the method further includes: If the fault detection result indicates that the three-phase power supply equipment has a wiring error, it is determined that the first target live wire, other than the two live wires corresponding to the first maximum effective value, is incorrectly connected to the neutral wire in the three-phase power supply equipment. Generate a second prompt message to indicate that the first target live wire and the neutral wire are connected incorrectly.

5. The method according to claim 3, characterized in that, Both the first target voltage and the second target voltage are phase voltages. After determining the fault detection result based on the first target voltage and the second target voltage, the method further includes: If the fault detection result indicates a wiring error in the three-phase power supply equipment, and the first ratio is within a first preset threshold range, it is determined that the second target live wire corresponding to the first minimum effective value is incorrectly connected to the neutral wire in the three-phase power supply equipment; wherein, the first preset threshold range is... to The range, the first preset threshold range does not include The first preset threshold range includes Generate a third prompt message to indicate that the second target live wire and the neutral wire are connected incorrectly; If the fault detection result indicates a wiring error in the three-phase power supply equipment, and the first ratio is within the second preset threshold range, it is determined that the third target live wire corresponding to the first maximum effective value is incorrectly connected to the neutral wire in the three-phase power supply equipment; wherein, the second preset threshold range is 1 to... The range of the second preset threshold does not include 1, and the range of the second preset threshold includes... Generate a fourth prompt message to indicate that the third target live wire and the neutral wire are connected incorrectly.

6. The method according to claim 1, characterized in that, The first target power line and the second target power line are the live wires in the three-phase power supply equipment, and the third target power line is the neutral wire in the three-phase power supply equipment. Determining the fault detection result based on the first target voltage and the second target voltage includes: Based on the first target voltage and the second target voltage, a fourth target voltage between the second target power line and the third target power line, and a fifth target voltage between the fourth target power line and the third power line in the three-phase power supply equipment are determined; The fault detection result is determined based on the second target voltage, the fourth target voltage, and the fifth target voltage.

7. The method according to claim 6, characterized in that, The step of determining a fourth target voltage between the second target power line and the third target power line, and a fifth target voltage between the fourth target power line and the third target power line in the three-phase power supply equipment, based on the first target voltage and the second target voltage, includes: The difference between the second target voltage and the first target voltage is determined to obtain the fourth target voltage; Determine the product of the second target voltage and the target of 2; The difference between the first target voltage and the product of the target voltages is determined to obtain the fifth target voltage.

8. The method according to claim 6 or 7, characterized in that, The determination of the fault detection result based on the second target voltage, the fourth target voltage, and the fifth target voltage includes: Determine the effective value of the second voltage corresponding to the second target voltage, the effective value of the fourth voltage corresponding to the fourth target voltage, and the effective value of the fifth voltage corresponding to the fifth target voltage; Determine the second maximum effective value and the second minimum effective value from the two effective voltage values, the fourth effective voltage value, and the fifth effective voltage value; The fault detection result is determined based on the second maximum effective value and the second minimum effective value.

9. The method according to claim 8, characterized in that, The determination of the fault detection result based on the second maximum effective value and the second minimum effective value includes: Determine a second ratio between the second maximum effective value and the second minimum effective value; If the second ratio is greater than or equal to the second threshold, the fault detection result is determined to be a wiring error in the three-phase power supply equipment; wherein, the second threshold is greater than 1 and less than or equal to 1.

10. The method according to claim 9, characterized in that, After determining the fault detection result based on the first target voltage and the second target voltage, the method further includes: If the fault detection result indicates a wiring error in the three-phase power supply equipment, and the second ratio is within the range of the third preset threshold, it is determined that the fourth target live wire corresponding to the second minimum effective value is incorrectly connected to the neutral wire in the three-phase power supply equipment; wherein, the third preset threshold range is... to The range, the third preset threshold range does not include The third preset threshold range includes Generate a fifth prompt message to indicate that the fourth target's live wire and neutral wire are connected incorrectly; If the fault detection result indicates a wiring error in the three-phase power supply equipment, and the second ratio is within the range of the fourth preset threshold, it is determined that the fifth target live wire corresponding to the second maximum effective value is incorrectly connected to the neutral wire in the three-phase power supply equipment; wherein, the range of the fourth preset threshold is 1 to... The range, wherein the fourth preset threshold does not include 1, and the fourth preset threshold includes... A sixth prompt message is generated to indicate that the fifth target live wire and the neutral wire are connected incorrectly.

11. A fault detection device, characterized in that, The device includes: a first determining unit, a detection unit, a second determining unit, and a generating unit; wherein: The first determining unit is used to determine the first target power line, the second target power line, and the third target power line in the three-phase power supply equipment; wherein, the three-phase power supply equipment is used to supply power to user electrical equipment; The detection unit is used to detect a first target voltage between the first target power line and the second target power line, and a second target voltage between the first target power line and the third target power line. The second determining unit is used to determine a fault detection result based on the first target voltage and the second target voltage; wherein the fault detection result is used to indicate whether a wiring error has occurred in the three-phase power supply equipment; The generation unit is configured to generate a first prompt message if the fault detection result indicates that the three-phase power supply equipment has a wiring error; wherein the first prompt message is used to indicate that the three-phase power supply equipment has a wiring error. Specifically, the second determining unit is used to determine a third target voltage between the second target power line and the third target power line based on the first target voltage and the second target voltage; wherein the first target voltage and the second target voltage are both line voltages or phase voltages; and to determine the fault detection result based on the first target voltage, the second target voltage, and the third target voltage. Specifically, the second determining unit is used to determine the fault detection result based on the first target voltage, the second target voltage, and the third target voltage in the step of determining the fault detection result. Specifically, it is used to determine the first effective voltage value corresponding to the first target voltage, the second effective voltage value corresponding to the second target voltage, and the third effective voltage value corresponding to the third target voltage; determine a first maximum effective value and a first minimum effective value from the first effective voltage value, the second effective voltage value, and the third effective voltage value; and determine the fault detection result based on the first maximum effective value and the first minimum effective value. Specifically, when determining the fault detection result based on the first maximum effective value and the first minimum effective value in step 1, the second determining unit is used to determine a first ratio of the first maximum effective value to the first minimum effective value; if the first ratio is greater than or equal to a first threshold, the fault detection result is determined to be a wiring error in the three-phase power supply equipment.

12. A fault detection device, characterized in that, The device includes: a detection circuit and a processor; wherein: The detection circuit is used to connect to the first target power line, the second target power line, and the third target power line in the three-phase power supply equipment to detect the first target voltage between the first target power line and the second target power line, and the second target voltage between the first target power line and the third target power line, and to send the first target voltage and the second target voltage to the processor; wherein, the three-phase power supply equipment is used to supply power to user electrical equipment; The processor is configured to receive the first target voltage and the second target voltage sent by the detection circuit, and determine a fault detection result based on the first target voltage and the second target voltage; wherein the fault detection result is used to indicate whether a wiring error has occurred in the three-phase power supply equipment; if the fault detection result indicates that a wiring error has occurred in the three-phase power supply equipment, a first prompt message is generated; wherein the first prompt message is used to indicate that a wiring error has occurred in the three-phase power supply equipment. The step of determining the fault detection result based on the first target voltage and the second target voltage includes: Based on the first target voltage and the second target voltage, a third target voltage is determined between the second target power line and the third target power line; wherein, the first target voltage and the second target voltage are both line voltages or phase voltages; The fault detection result is determined based on the first target voltage, the second target voltage, and the third target voltage; The step of determining the fault detection result based on the first target voltage, the second target voltage, and the third target voltage includes: Determine the first effective voltage value corresponding to the first target voltage, the second effective voltage value corresponding to the second target voltage, and the third effective voltage value corresponding to the third target voltage; Determine the first maximum effective value and the first minimum effective value from the first effective voltage value, the second effective voltage value, and the third effective voltage value; The fault detection result is determined based on the first maximum effective value and the first minimum effective value; The step of determining the fault detection result based on the first maximum effective value and the first minimum effective value includes: Determine a first ratio between the first maximum effective value and the first minimum effective value; If the first ratio is greater than or equal to the first threshold, the fault detection result is determined to be a wiring error in the three-phase power supply equipment.

13. A three-phase power supply system, characterized in that, The three-phase power supply system includes: a three-phase power supply device for providing three-phase power and a fault detection device as described in claim 12.

14. A storage medium, characterized in that, The storage medium stores a fault detection program, which, when executed by a processor, implements the steps of the fault detection method as described in any one of claims 1 to 10.

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