Wiring method and equipment of power analyzer, storage medium and wiring device

Abstract

The invention provides a wiring method and equipment of a power analyzer, a storage medium and a wiring device. The method comprises the following steps: acquiring a wiring switch signal; determining a to-be-conducted wiring mode of the power analyzer according to the wiring switch signal, and matching a relay corresponding to the wiring mode; the wiring modes comprise a wiring mode for measuring the input end of a single-phase product, a wiring mode for measuring the input end of a three-phase product, a wiring mode for measuring the input end of a three-phase four-wire product and a wiring mode for measuring the output end of the product; and a control signal of the relay is output, so that the relay is actuated, and the measurement loop of the wiring mode is conducted. According to the invention, the on and off of the relay can be adjusted according to the wiring measurement requirement of the power analyzer, so that different wiring modes can be adjusted.

Description

Technical Field

[0001] The present application belongs to the technical field of product measurement and relates to a wiring method, and in particular to a wiring method, equipment, storage medium and wiring device of a power analyzer. Background Art

[0002] In the process of inverter development and design, it is necessary to test whether the harmonic current, power factor, efficiency and other parameters meet the requirements, and a power analyzer is needed. When testing single-phase or three-phase inverter products, the input wiring method needs to be adjusted accordingly. This wiring operation greatly prolongs the platform construction time and reduces the test efficiency.

[0003] For single-phase products, select the 1P2W wiring method of the power analyzer. For three-phase products (without neutral wire), select the 3P3W (3V3A) wiring method. For three-phase products (with neutral wire), select the 3P4W wiring method.

[0004] When using a power analyzer to measure large voltages or currents, the power capacity of the object being measured will be very large. If the wiring is incorrect, the circuit being measured will generate overvoltage or overcurrent. Not only will it damage the test equipment and the object being measured, but it may also cause electric shock and fire. However, many power analyzers have built-in overcurrent and overvoltage protection, and mainly rely on manual inspection of wiring, which poses a risk of equipment damage and safety hazards.

[0005] Therefore, the existing technology has the following problems: (1) There are multiple wiring methods for power analyzers, and the wiring is complicated, which makes the platform construction inefficient. (2) Power analyzers do not have overcurrent and overvoltage protection. Manual wiring errors may cause equipment damage, and in serious cases, there is a risk of electric shock and fire. Summary of the invention

[0006] The present application provides a wiring method, equipment, storage medium and wiring device of a power analyzer, which are used to solve the problem of flexible wiring of the power analyzer for measuring the input and output ends of a product.

[0007] In a first aspect, the present application provides a wiring method for a power analyzer, which is applied to a circuit board of a wiring device, wherein the circuit board includes a main control circuit, a relay control circuit and at least 4 wiring switches; the wiring switch and the relay control circuit are respectively connected to the main control circuit, and the main control circuit controls the attraction and disconnection of different relays in the relay control circuit according to the on-off state of the wiring switch to determine the wiring mode to be turned on; the method includes: obtaining a wiring switch signal; determining the wiring mode to be turned on of the power analyzer according to the wiring switch signal, and matching the relay corresponding to the wiring mode; the wiring mode includes a wiring mode for measuring the input end of a single-phase product, a wiring mode for measuring the input end of a three-phase product, a wiring mode for measuring the input end of a three-phase four-wire product, and a wiring mode for measuring the output end of a product; outputting a control signal of the relay to close the relay and turn on the measurement circuit of the wiring mode.

[0008] In an implementation of the first aspect, the method further includes: detecting the input voltage value of each channel in the power analyzer, and in response to detecting that the input voltage value exceeds a first preset voltage value, disconnecting the circuit of all relays so that no signal enters the power analyzer.

[0009] In an implementation of the first aspect, the method further includes: detecting the output voltage value of each channel in the power analyzer, in response to detecting that the input voltage value of the power analyzer is 0, and the output voltage value exceeds a second preset voltage value, disconnecting the circuits of all relays, and uploading a fault code for reverse input and output.

[0010] In an implementation of the first aspect, a zero-crossing judgment is performed on the input voltage value, and in response to the time intervals for the first phase sequence, the second phase sequence, and the third phase sequence to change from negative to positive not meeting a preset interval condition, the circuits of all relays are disconnected, and a fault code for abnormal input phase sequence is uploaded.

[0011] In an implementation of the first aspect, the method further includes: detecting the input current value of each channel in the power analyzer, and in response to detecting that the input current value exceeds a preset current value, disconnecting the circuit of all relays so that no signal enters the power analyzer.

[0012] In an implementation of the first aspect, the relay control circuit includes a first relay, a second relay, a third relay, a fourth relay, a fifth relay, a sixth relay, a seventh relay, an eighth relay, a ninth relay and a tenth relay; the step of outputting the control signal of the relay to make the relay energized and turning on the measurement circuit of the wiring mode includes: in response to the wiring mode to be turned on being a 1P2W wiring mode measured at the input end of a single-phase product, outputting the control signal of the first relay to make the first relay energized and turning on the measurement circuit of the 1P2W wiring mode; in response to the wiring mode to be turned on being a 3P2W wiring mode measured at the input end of a three-phase product, outputting the control signal of the first relay to make the first relay energized and turning on the measurement circuit of the 1P2W wiring mode. In response to the 3P4W wiring mode measured at the input end of the three-phase four-wire product, the control signals of the 5th, 6th and 7th relays are output to make the 5th, 6th and 7th relays attract and turn on the measurement circuit of the 3P4W wiring mode; in response to the 3P3W wiring mode measured at the output end of the product, the control signals of the 8th, 9th and 10th relays are output to make the 8th, 9th and 10th relays attract and turn on the measurement circuit of the 3P3W wiring mode at the output end.

[0013] In a second aspect, the present application provides an electronic device, comprising: a processor and a memory; the memory is used to store a computer program, and the processor is used to execute the computer program stored in the memory, so that the electronic device performs the described method.

[0014] In a third aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, which implements the method described when the computer program is executed.

[0015] In a fourth aspect, the present application provides a wiring device for a power analyzer, the wiring device comprising: a main control circuit, a relay control circuit and at least 4-way wiring switches, the wiring switches and the relay control circuit are respectively connected to the main control circuit; the signal corresponding to the on-off state of the wiring switch is a wiring switch signal, the main control circuit determines the wiring mode to be turned on of the power analyzer according to the wiring switch signal, matches the relay corresponding to the wiring mode, controls the attraction of the corresponding relay in the relay control circuit, and turns on the measurement circuit of the wiring mode.

[0016] In an implementation of the fourth aspect, the wiring device also includes: a rectifier circuit, a power supply circuit, a voltage detection circuit and a current detection circuit; the rectifier circuit converts AC voltage into DC voltage and inputs it into the power supply circuit, the power supply circuit provides working voltage for the relay control circuit and the main control circuit, the voltage detection circuit is configured to detect the input voltage value of each channel of the power analyzer, and the current detection circuit is configured to detect the input current value of each channel of the power analyzer.

[0017] As described above, the wiring method, device, storage medium and wiring device of the power analyzer described in the present application have the following beneficial effects:

[0018] This application presets the test harnesses for different wiring methods in advance. When changing the measurement items, the platform construction can be completed by controlling each relay through the main control circuit and connecting a small number of harnesses, which reduces the platform preparation time and improves the test efficiency. This application can identify abnormal situations such as reverse connection of input and output, and abnormal input phase sequence (the phase sequence detection function is only for three-phase input products), and will not test in the case of abnormal wiring. This application can also cut off the power meter input when the voltage and current are large, thereby protecting the power meter. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Shown is a schematic diagram of an application scenario of the wiring method for a power analyzer described in an embodiment of the present application.

[0020] Figure 2 Shown is a principle flow chart of the wiring method of the power analyzer described in an embodiment of the present application.

[0021] Figure 3 Shown is a schematic diagram of the structural connection of an electronic device described in an embodiment of the present application.

[0022] Figure 4 Shown is a circuit schematic diagram of the wiring device described in an embodiment of the present application.

[0023] Figure 5 Shown is a schematic diagram of a rectification circuit of a wiring device according to an embodiment of the present application.

[0024] Figure 6 Shown is a schematic diagram of a power supply circuit of a wiring device according to an embodiment of the present application.

[0025] Figure 7 Shown is a schematic diagram of an input current sampling circuit of a wiring device according to an embodiment of the present application.

[0026] Figure 8 Shown is a schematic diagram of a 1P2W input voltage detection circuit of a wiring device according to an embodiment of the present application.

[0027] Fig. 9 Shown is a schematic diagram of a 3P3W input voltage detection circuit of a wiring device according to an embodiment of the present application.

[0028] Fig.10 Shown is a schematic diagram of a 3P4W input voltage detection circuit of a wiring device according to an embodiment of the present application.

[0029] Fig.11 Shown is a schematic diagram of a 3P3W output voltage detection circuit of a wiring device according to an embodiment of the present application.

[0030] Fig.12 Shown is a schematic diagram of a 1P2W input wiring control circuit of a wiring device according to an embodiment of the present application.

[0031] Fig.13 Shown is a schematic diagram of a 3P3W input wiring control circuit of a wiring device according to an embodiment of the present application.

[0032] Fig.14 Shown is a schematic diagram of a 3P4W input wiring control circuit of a wiring device according to an embodiment of the present application.

[0033] Fig.15 Shown is a schematic diagram of a 3P3W output wiring control circuit of a wiring device according to an embodiment of the present application.

[0034] Fig.16 Shown is a schematic diagram of the main control circuit of the wiring device described in an embodiment of the present application.

[0035] Fig.17 Shown is a buffer and wiring parallel circuit diagram of a wiring device according to an embodiment of the present application.

[0036] Fig.18 Shown is a schematic diagram of a switch selection wiring method of a wiring device according to an embodiment of the present application.

[0037] Component number description

[0038] 1 Electronic equipment

[0039] 11 Processor

[0040] 12 Memory

[0041] Steps S21 to S23 DETAILED DESCRIPTION

[0042] The following describes the embodiments of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. The present application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0043] It should be noted that the illustrations provided in the following embodiments are only used to illustrate the basic concept of the present application in a schematic manner, and therefore the illustrations only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0044] The following embodiments of the present application provide a wiring method, equipment, storage medium and wiring device for a power analyzer, including but not limited to flexible switching scenarios for measuring 1P2W, 3P3W, 3P4W wiring methods at the input end and 3P3W wiring methods at the output end. The following will be described using this hardware application scenario as an example.

[0045] See also Figure 1 , which is a schematic diagram showing an application scenario of the wiring method of the power analyzer described in the embodiment of the present application. Figure 1 As shown, this embodiment provides a hardware application scenario of a wiring method for a power analyzer, including a 4-way wiring switch, 10 relays, and a power analyzer circuit and a product input and output circuit connected to the 10 relays. Among them, the 4-way wiring switch includes a 1-way wiring switch corresponding to the input end 1P2W wiring mode, a 1-way wiring switch corresponding to the input end 3P3W wiring mode, a 1-way wiring switch corresponding to the input end 3P4W wiring mode, and a 1-way wiring switch corresponding to the output end 3P3W wiring mode.

[0046] The technical solutions in the embodiments of the present application will be described in detail below in conjunction with the drawings in the embodiments of the present application.

[0047] See also Figure 2 , which is a principle flow chart of the wiring method of the power analyzer described in the embodiment of the present application. Figure 2As shown, this embodiment provides a wiring method for a power analyzer, which is applied to a circuit board of a wiring device, wherein the circuit board includes a main control circuit, a relay control circuit and at least 4 wiring switches; the wiring switches and the relay control circuit are respectively connected to the main control circuit, and the main control circuit controls the closing and opening of different relays in the relay control circuit according to the on-off state of the wiring switch to determine the wiring mode to be connected; the wiring method for the power analyzer specifically includes steps S21 to S23:

[0048] S21, obtaining a wiring switch signal.

[0049] Specifically, combined Figure 1 The wiring switch signal includes a wiring switch signal corresponding to the 1P2W wiring mode at the input end, a wiring switch signal corresponding to the 3P3W wiring mode at the input end, a wiring switch signal corresponding to the 3P4W wiring mode at the input end, and a wiring switch signal corresponding to the 3P3W wiring mode at the output end.

[0050] S22, determining the wiring mode of the power analyzer to be turned on according to the wiring switch signal, and matching the relay corresponding to the wiring mode; the wiring mode includes the wiring mode for measuring the input end of a single-phase product, the wiring mode for measuring the input end of a three-phase product, the wiring mode for measuring the input end of a three-phase four-wire product, and the wiring mode for measuring the output end of a product.

[0051] In one embodiment, the relay control circuit includes a first relay, a second relay, a third relay, a fourth relay, a fifth relay, a sixth relay, a seventh relay, an eighth relay, a ninth relay and a tenth relay; Figure 1 , the attraction and disconnection of the first relay from the left corresponds to the on-off of the measuring circuit of the 1P2W wiring method, the attraction and disconnection of the second, third, and fourth relays from the left corresponds to the on-off of the measuring circuit of the 3P3W wiring method at the input end, the attraction and disconnection of the fifth, sixth, and seventh relays from the left corresponds to the on-off of the measuring circuit of the 3P4W wiring method, and the attraction and disconnection of the eighth, ninth, and tenth relays from the left corresponds to the on-off of the measuring circuit of the 3P3W wiring method at the output end.

[0052] In one embodiment, the wiring switch signal is a 1-way wiring switch signal corresponding to the input end 1P2W wiring mode, thereby determining that the wiring mode to be turned on by the power analyzer is the input end 1P2W wiring mode, and further, the matching relay to be controlled is the first relay from the left.

[0053] S23, outputting a control signal of the relay to close the relay and conduct the measurement circuit of the wiring mode.

[0054] In one embodiment, step S23 specifically includes:

[0055] In response to the wiring mode to be turned on being a 1P2W wiring mode for measuring the input end of a single-phase product, a control signal of the first relay is output to close the first relay and turn on the measurement circuit of the 1P2W wiring mode;

[0056] In response to the wiring mode to be turned on being the 3P3W wiring mode for measuring the input end of a three-phase product, the control signals of the second, third and fourth relays are outputted to close the second, third and fourth relays and turn on the measurement circuit of the 3P3W wiring mode at the input end;

[0057] In response to the wiring mode to be turned on being a 3P4W wiring mode measured at the input end of a three-phase four-wire product, the control signals of the 5th, 6th and 7th relays are output to close the 5th, 6th and 7th relays to turn on the measurement circuit of the 3P4W wiring mode;

[0058] In response to the wiring mode to be turned on being the 3P3W wiring mode measured at the output end of the product, control signals of the 8th, 9th and 10th relays are output to close the 8th, 9th and 10th relays and turn on the measurement circuit of the 3P3W wiring mode at the output end.

[0059] In one embodiment, the method further comprises:

[0060] The input voltage value of each channel in the power analyzer is detected, and in response to detecting that the input voltage value exceeds a first preset voltage value, the circuits of all relays are disconnected, and no signal enters the power analyzer anymore.

[0061] In one embodiment, the method further comprises:

[0062] The output voltage value of each channel in the power analyzer is detected. In response to detecting that the input voltage value of the power analyzer is 0 and the output voltage value exceeds a second preset voltage value, the circuits of all relays are disconnected and a fault code of input and output reverse connection is uploaded.

[0063] In one embodiment, the input voltage value is judged to pass through a zero point, and in response to the time intervals of the first phase sequence, the second phase sequence, and the third phase sequence changing from negative to positive not meeting a preset interval condition, the circuits of all relays are disconnected, and a fault code of abnormal input phase sequence is uploaded.

[0064] In one embodiment, the method further comprises:

[0065] The input current value of each channel in the power analyzer is detected, and in response to detecting that the input current value exceeds a preset current value, the circuits of all relays are disconnected, and no signal enters the power analyzer anymore.

[0066] The protection scope of the wiring method of the power analyzer described in the embodiment of the present application is not limited to the execution order of the steps listed in the present embodiment. All solutions implemented by adding, reducing or replacing steps in the prior art based on the principles of the present application are included in the protection scope of the present application.

[0067] See also Figure 3 , which is a schematic diagram showing the structural connection of the electronic device described in the embodiment of the present application. Figure 3 As shown, the electronic device 1 of the present application includes: a processor 11 and a memory 12; the memory 12 is used to store computer programs, and the processor 11 is used to execute the computer programs stored in the memory 12, so that the electronic device 1 performs each step of the wiring method of the power analyzer.

[0068] The above-mentioned processor 11 can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components.

[0069] The memory 12 may include a random access memory (RAM), and may also include a non-volatile memory (non-Uolatile memory), such as at least one disk memory.

[0070] The embodiment of the present application also provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed, the wiring method of the power analyzer is implemented.

[0071] A person of ordinary skill in the art can understand that all or part of the steps in the method for implementing the above-mentioned embodiment can be completed by instructing a processor through a program, and the program can be stored in a computer-readable storage medium, and the storage medium is a non-transitory medium, such as a random access memory, a read-only memory, a flash memory, a hard disk, a solid-state hard disk, a magnetic tape, a floppy disk, an optical disc, and any combination thereof. The above-mentioned storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or a data center that includes one or more available media. The available medium can be a magnetic medium (for example, a floppy disk, a hard disk, a tape), an optical medium (for example, a digital video disc (DVD)), or a semiconductor medium (for example, a solid-state disk (SSD)), etc.

[0072] An embodiment of the present application also provides a wiring device of a power analyzer, and the wiring device of the power analyzer can implement the wiring method of the power analyzer described in the present application. However, the implementation device of the wiring method of the power analyzer described in the present application includes but is not limited to the structure of the wiring device of the power analyzer listed in the present embodiment. All structural deformations and replacements of the prior art made according to the principles of the present application are included in the protection scope of the present application.

[0073] See also Figure 4 , which is a circuit diagram of the wiring device described in the embodiment of the present application. Figure 4 As shown, this embodiment provides a wiring device for a power analyzer, the wiring device includes: a main control circuit, a relay control circuit and at least 4-way wiring switches, the wiring switches and the relay control circuit are respectively connected to the main control circuit; wherein the main control circuit includes the above-mentioned electronic device, and the electronic device can be, for example, a main control chip MCU (Microcontroller Unit, micro control unit or single-chip microcomputer) and the like.

[0074] The signal corresponding to the on-off state of the wiring switch is the wiring switch signal. The main control circuit determines the wiring mode of the power analyzer to be turned on according to the wiring switch signal, matches the relay corresponding to the wiring mode, controls the attraction of the corresponding relay in the relay control circuit, and turns on the measurement circuit of the wiring mode.

[0075] In one embodiment, the wiring device further includes: a rectification circuit, a power supply circuit, a voltage detection circuit and a current detection circuit.

[0076] The rectifier circuit converts the AC voltage into a DC voltage and inputs it into the power supply circuit. The power supply circuit provides working voltage for the relay control circuit and the main control circuit. The voltage detection (or sampling) circuit is configured to detect the input voltage value of each channel of the power analyzer. The current detection (or sampling) circuit is configured to detect the input current value of each channel of the power analyzer.

[0077] In practical applications, the power supply circuit may be a SMPS (Switch Mode Power Supply) circuit, which is configured to generate a 12V voltage required for the relay to work and a 3.3V voltage for the MCU to work. In other embodiments, the power supply circuit may also be other power supply circuits that do not affect the implementation of the technical principles of the present application.

[0078] exist Figures 5 to 18 The meanings of the various labels are as follows:

[0079] The letter A indicates the 1P2W wiring mode, the letter B indicates the 3P3W (3V3A) wiring mode, and the letter C indicates the 3P4W wiring mode. The letter D indicates the 3P3W (3V3A) wiring mode (test output related data). Among them, channels 1, 2, and 3 are used for input related data measurement, and channels 4, 5, and 6 are used for output related data measurement.

[0080] PA1-1, PA1-2, PA1-3, and PA1-4 are connected to the first test channel of the power analyzer, +U, -U, +I, and -I in sequence.

[0081] PB1-1, PB1-2, PB1-3, and PB1-4 are connected to the first test channel of the power analyzer, +U, -U, +I, and -I in sequence.

[0082] PB2-1, PB2-2, PB2-3, and PB2-4 are connected to the second test channel of the power analyzer, +U, -U, +I, and -I in sequence.

[0083] PB3-1, PB3-2, PB3-3, and PB3-4 are connected to the third test channel of the power analyzer, +U, -U, +I, and -I in sequence.

[0084] PC1-1, PC1-2, PC1-3, PC1-4 are connected to the first test channel of the power analyzer, +U, -U, +I, -I in sequence.

[0085] PC2-1, PC2-2, PC2-3, PC2-4 are connected to the second test channel of the power analyzer, +U, -U, +I, -I in sequence.

[0086] PC3-1, PC3-2, PC3-3, PC3-4 are connected to the third test channel of the power analyzer, +U, -U, +I, -I in sequence.

[0087] PD1-1, PD1-2, PD1-3, PD1-4 are connected to the fourth test channel of the power analyzer, +U, -U, +I, -I in sequence.

[0088] PD2-1, PD2-2, PD2-3, and PD2-4 are connected to the fifth test channel of the power analyzer, +U, -U, +I, and -I in sequence.

[0089] PD3-1, PD3-2, PD3-3, and PD3-4 are connected to the sixth test channel of the power analyzer, +U, -U, +I, and -I in sequence.

[0090] The wiring terminals CN4, CN5, CN6, and CN7 represent "L1", "L2", "L3", and "N" respectively, indicating that the signal enters the power analyzer. The wiring terminals CN8, CN9, CN10, and CN11 represent "L1-out", "L2-out", "L3-out", and "N-out" respectively, indicating that the signal flows out of the power analyzer. The above wiring terminals are used for input terminals 1P2W, 3P3W, and 3P4W. Among them, L1, L2, L3, and N refer to the three live wires and one neutral wire of the input power supply, and can also be replaced by other characters.

[0091] Terminals CN4 and CN7 are 1P2W Source terminals, indicating that the signal enters the power analyzer, and terminals CN8 and CN11 are 1P2W Load terminals, indicating that the signal flows out of the power analyzer. Test input related data.

[0092] Terminals CN4, CN5, and CN6 are 3P3W (3V3A) Source terminals, indicating that the signal enters the power analyzer, and terminals CN8, CN9, and CN10 are 3P3W (3V3A) Load terminals, indicating that the signal flows out of the power analyzer. Test input related data.

[0093] Terminals CN4, CN5, CN6, and CN7 are 3P4W Source terminals, indicating that the signal enters the power analyzer, and terminals CN8, CN9, CN10, and CN11 are 3P4W Load terminals, indicating that the signal flows out of the power analyzer. Test input related data.

[0094] The wiring terminals CN12, CN13, and CN14 represent "U", "V", and "W" respectively, indicating that the signal enters the power analyzer. The wiring terminals CN15, CN16, and CN17 represent "U-out", "V-out", and "W-out" respectively, indicating that the signal flows out of the power analyzer. The above wiring terminals are used for the output terminal 3P3W. Among them, U, V, and W refer to the three load lines at the output terminal, and other characters can also be used instead.

[0095] Terminals CN12, CN13, and CN14 are 3P3W (3V3A) Source terminals, indicating that the signal enters the power analyzer, and terminals CN15, CN16, and CN17 are 3P3W (3V3A) Load terminals, indicating that the signal flows out of the power analyzer. Test output related data.

[0096] See also Figure 5 , which is a schematic diagram of a rectifier circuit of a wiring device according to an embodiment of the present application. Figure 5 As shown, the 220V power supply is connected through the live wire L terminal (CN1) and the neutral wire N terminal (CN2), and EMI (Electromagnetic Interference) filtering, power-on impact current suppression, and the rectification circuit formed by the rectifier bridge DN1 and the periphery are performed, and finally output through DCP and DCN.

[0097] See also Figure 6 , which is a schematic diagram of a power supply circuit of a wiring device according to an embodiment of the present application. Figure 6 As shown, based on the output of the rectifier circuit DCP and DCN, the power chip TNY280 converts the DC voltage 12V and DC voltage 15V. Among them, the DC voltage 12V supplies power to each relay, and the DC voltage 15V is converted to 5V by the voltage regulator chip U2 to supply power to the main control chip MCU in the main control circuit.

[0098] See also Figure 7 , which is a schematic diagram of the input current sampling circuit of the wiring device according to the embodiment of the present application. Figure 7 As shown, the wiring terminals CN4 (L1-in), CN5 (L2-in), and CN6 (L3-in) are 3P3W (3V3A) Source terminals, indicating that the signal enters the power analyzer, and the wiring terminals CN12 (U-in), CN13 (V-in), and CN14 (W-in) are 3P3W (3V3A) Source terminals, indicating that the signal enters the power analyzer. CT1, CT2, CT3, CT4, CT5, and CT6 represent the current transformers corresponding to each line, realizing the current collection function corresponding to each line. Among them, 3P4W and 3P3W share one input current detection circuit.

[0099] See also Figure 8 , which is a schematic diagram of a 1P2W input voltage detection circuit of a wiring device according to an embodiment of the present application. Figure 8 As shown, letter A indicates 1P2W wiring mode, wiring terminals CN4 and CN7 are 1P2W Source terminals, indicating that the signal enters the power analyzer, and Vac-A1 indicates the acquisition signal of the input voltage under 1P2W wiring mode.

[0100] See also Fig. 9 , which is a schematic diagram of a 3P3W input voltage detection circuit of a wiring device according to an embodiment of the present application. Fig. 9 As shown, the wiring terminals CN4, CN5, and CN6 are 3P3W (3V3A) Source terminals, indicating that the signal enters the power analyzer, and Vac-B1, Vac-B2, and Vac-B3 represent the acquisition signals of the input voltage under the 3P3W wiring mode.

[0101] See also Fig.10 , which is a schematic diagram of a 3P4W input voltage detection circuit of a wiring device according to an embodiment of the present application. Fig.10 As shown in the figure, 3P4W and 3P3W share a common input voltage detection circuit for detecting input voltage. Terminals CN4, CN5, and CN6 are 3P3W (3V3A) Source terminals, indicating that the signal enters the power analyzer, and Vac-B1, Vac-B2, and Vac-B3 represent the collected signals of the input voltage under the 3P3W wiring mode.

[0102] See also Fig.11 , which is a schematic diagram of a 3P3W output voltage detection circuit of a wiring device according to an embodiment of the present application. Fig.11 As shown, the wiring terminals CN15, CN16, and CN17 are 3P3W (3V3A) Load terminals, indicating that the signal flows out of the power analyzer, and Vac-D1, Vac-D2, and Vac-D3 represent the acquisition signals of the output voltage under the 3P3W wiring mode.

[0103] See also Fig.12 , which is a schematic diagram of a 1P2W input wiring control circuit of a wiring device according to an embodiment of the present application. Fig.12 As shown, RY5, RY6, RY7, and RY8 work, and 1P2W wiring mode can be selected. Vac-A1 and I-sample A1 are used to test input voltage and input current data.

[0104] See also Fig.13 , which is a schematic diagram of a 3P3W input wiring control circuit of a wiring device according to an embodiment of the present application. Fig.13As shown, RY10, RY11, RY12, RY13, RY14, RY15, RY16, RY17, RY18, RY19, RY20, and RY21 work, and 3P3W (3V3A) wiring mode can be selected. Vac-B1, Vac-B2, and Vac-B3 are used to test input voltage data, and I-sample A1, I-sample B2, and I-sample B3 are used to test input current data.

[0105] See also Fig.14 , which is a schematic diagram of a 3P4W input wiring control circuit of a wiring device according to an embodiment of the present application. Fig.14 As shown, RY10, RY11, RY12, RY22, RY23, RY24, RY25, RY26, RY27, RY28, RY29, RY30, RY31 work, 3P4W wiring mode can be selected, Vac-B1, Vac-B2, Vac-B3 are used to test input voltage data, I-sample A1, I-sample B2, I-sample B3 are used to test input current data.

[0106] See also Fig.15 , which is a schematic diagram of a 3P3W output wiring control circuit of a wiring device according to an embodiment of the present application. Fig.15 As shown, RY32, RY33, RY34, RY35, RY36, RY37, RY38, RY39, RY40, RY41, RY42, and RY43 can work, and 3P3W (3V3A) wiring mode can be selected.

[0107] See also Fig.16 , which is a schematic diagram of the main control circuit of the wiring device described in the embodiment of the present application. Fig.16 As shown, the main control chip U10 is connected to voltage test data Vac-A1, Vac-B1 Vac-B2, Vac-B3, Vac-D4, Vac-D5, and Vac-D6; and current test signals I-sample A1, I-sample B2, I-sample B3, I-sample D4, I-sample D5, and I-sample D6 are also connected; there are also I2C (Inter-Integrated Circuit, a bidirectional two-wire synchronous serial bus) communication and 485 communication terminals of the main control chip, as well as receiving terminals SW1, SW2, SW3, and SW4 of wiring switch signals.

[0108] See also Fig.17 , which shows a buffer and wiring parallel circuit diagram of the wiring device described in the embodiment of the present application. Fig.17As shown, ULN2003 serves as a buffer for the control signals of each relay, and the connection of each number in the circle represents the parallel relationship in the overall circuit of the wiring device.

[0109] See also Fig.18 , which is a schematic diagram of the switch selection wiring mode of the wiring device according to the embodiment of the present application. Fig.18 As shown, combined Fig.16 The main control chip receiving terminals SW1, SW2, SW3, and SW4 are shown. Fig.18 The circuit shown generates wiring switch signals corresponding to SW1, SW2, SW3, SW4 by turning on different wiring switches SW1, SW2, SW3, SW4 and transmits them to the receiving ends SW1, SW2, SW3, SW4 of the main control chip.

[0110] Combination Figures 5 to 18 The circuit connection relationship shown in the figure, the wiring device of the power analyzer is based on the automatic control wiring mode switching, and the various functions realized are described in detail as follows:

[0111] (1) Input voltage protection function: When the MCU detects that the input voltage exceeds 1000V (this value can be adjusted according to the power meter test range), all relay circuits are disconnected, no signal enters the power meter, and the fault code is uploaded.

[0112] (2) Current protection function: When the MCU detects that the input voltage exceeds 50A (this value can be adjusted according to the power meter test range), all relay circuits are disconnected, no signal enters the power meter, and the fault code is uploaded.

[0113] (3) Input & output reverse connection protection function: When the MCU input detection voltage is 0 and the output detection voltage is greater than 50V, all relay circuits are disconnected and the fault code is uploaded.

[0114] (4) Input phase sequence abnormality protection function: MCU tests the input voltage signal in real time and makes a judgment at the zero-crossing point: if the zero-crossing time when R changes from - to + is taken as time 0, then the zero-crossing time when S changes from - to + should be 6.667ms (1 / 3f, f refers to the grid frequency); the zero-crossing time when T changes from - to + should be 13.33ms (2 / 3f, f refers to the grid frequency). If the time detected by MCU does not meet the requirements, all relay circuits are disconnected and the fault code is uploaded.

[0115] Therefore, the present application simplifies the operation of the wiring terminal and adds input voltage protection function, input current protection function, input and output reverse connection protection function, and input phase sequence reverse connection protection function.

[0116] In the several embodiments provided in the present application, it should be understood that the disclosed device or method can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of modules / units is only a logical function division. There may be other division methods in actual implementation, such as multiple modules or units can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or modules or units, which can be electrical, mechanical or other forms.

[0117] The modules / units described as separate components may or may not be physically separated, and the components displayed as modules / units may or may not be physical modules, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules / units may be selected according to actual needs to achieve the purpose of the embodiments of the present application. For example, the functional modules / units in the various embodiments of the present application may be integrated into one processing module, or each module / unit may exist physically separately, or two or more modules / units may be integrated into one module / unit.

[0118] Those of ordinary skill in the art should further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0119] The descriptions of the processes or structures corresponding to the above-mentioned figures have different emphases. For parts that are not described in detail in a certain process or structure, please refer to the relevant descriptions of other processes or structures.

[0120] The above embodiments are merely illustrative of the principles and effects of the present application and are not intended to limit the present application. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed in the present application shall still be covered by the claims of the present application.

Claims

1. A wiring method for a power analyzer, characterized in that: A circuit board applied to a wiring device, the circuit board comprises a main control circuit, a relay control circuit and at least 4 wiring switches; the wiring switches and the relay control circuit are respectively connected to the main control circuit, and the main control circuit controls the closing and opening of different relays in the relay control circuit according to the on-off state of the wiring switch to determine the wiring mode to be connected; the method comprises: Get the wiring switch signal; Determine the wiring mode of the power analyzer to be turned on according to the wiring switch signal, and match the relay corresponding to the wiring mode; the wiring mode includes the wiring mode for measuring the input end of a single-phase product, the wiring mode for measuring the input end of a three-phase product, the wiring mode for measuring the input end of a three-phase four-wire product, and the wiring mode for measuring the output end of a product; The control signal of the relay is output to close the relay and conduct the measurement circuit of the wiring mode.

2. The method according to claim 1, characterized in that The method further comprises: The input voltage value of each channel in the power analyzer is detected, and in response to detecting that the input voltage value exceeds a first preset voltage value, the circuits of all relays are disconnected, and no signal enters the power analyzer anymore.

3. The method according to claim 2, characterized in that The method further comprises: The output voltage value of each channel in the power analyzer is detected. In response to detecting that the input voltage value of the power analyzer is 0 and the output voltage value exceeds a second preset voltage value, the circuits of all relays are disconnected and a fault code of input and output reverse connection is uploaded.

4. The method according to claim 2, characterized in that: The input voltage value is judged to pass through a zero point. In response to the time intervals of the first phase sequence, the second phase sequence and the third phase sequence changing from negative to positive not meeting the preset interval conditions, the circuits of all relays are disconnected and a fault code of abnormal input phase sequence is uploaded.

5. The method according to claim 1, characterized in that The method further comprises: The input current value of each channel in the power analyzer is detected, and in response to detecting that the input current value exceeds a preset current value, the circuits of all relays are disconnected, and no signal enters the power analyzer anymore.

6. The method according to claim 1, characterized in that The relay control circuit includes a first relay, a second relay, a third relay, a fourth relay, a fifth relay, a sixth relay, a seventh relay, an eighth relay, a ninth relay and a tenth relay; the steps of outputting control signals of the relays to close the relays and conducting the measurement circuit of the wiring mode include: In response to the wiring mode to be turned on being a 1P2W wiring mode for measuring the input end of a single-phase product, a control signal of the first relay is output to close the first relay and turn on the measurement circuit of the 1P2W wiring mode; In response to the wiring mode to be turned on being the 3P3W wiring mode for measuring the input end of a three-phase product, the control signals of the second, third and fourth relays are outputted to close the second, third and fourth relays and turn on the measurement circuit of the 3P3W wiring mode at the input end; In response to the wiring mode to be turned on being a 3P4W wiring mode measured at the input end of a three-phase four-wire product, the control signals of the 5th, 6th and 7th relays are output to close the 5th, 6th and 7th relays to turn on the measurement circuit of the 3P4W wiring mode; In response to the wiring mode to be turned on being the 3P3W wiring mode measured at the output end of the product, control signals of the 8th, 9th and 10th relays are output to close the 8th, 9th and 10th relays to turn on the measurement circuit of the 3P3W wiring mode at the output end.

7. An electronic device, characterized in that: The electronic device comprises: a processor and a memory; The memory is used to store a computer program, and the processor is used to execute the computer program stored in the memory, so that the electronic device executes the method according to any one of claims 1 to 6.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed, the method according to any one of claims 1 to 6 is implemented.

9. A wiring device for a power analyzer, characterized in that: The wiring device comprises: a main control circuit, a relay control circuit and at least 4-way wiring switches, wherein the wiring switches and the relay control circuit are respectively connected to the main control circuit; The signal corresponding to the on-off state of the wiring switch is the wiring switch signal. The main control circuit determines the wiring mode of the power analyzer to be turned on according to the wiring switch signal, matches the relay corresponding to the wiring mode, controls the attraction of the corresponding relay in the relay control circuit, and turns on the measurement circuit of the wiring mode.

10. The wiring device according to claim 9, characterized in that: The wiring device also includes: a rectification circuit, a power supply circuit, a voltage detection circuit and a current detection circuit; The rectifier circuit converts AC voltage into DC voltage and inputs it into the power supply circuit. The power supply circuit provides working voltage for the relay control circuit and the main control circuit. The voltage detection circuit is configured to detect the input voltage value of each channel of the power analyzer. The current detection circuit is configured to detect the input current value of each channel of the power analyzer.

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