Transformer connection detection method, universal circuit breaker and device

Abstract

The application provides a kind of mutual inductor wiring detection method, all-purpose circuit breaker and equipment.In some embodiments of the application, the mutual inductor wiring detection device obtains the detection signal of each phase mutual inductor current, and the mutual inductor wiring detection device determines the phase difference between the first phase and the second phase according to the detection signal of the first phase mutual inductor current and the detection signal of the second phase mutual inductor current;According to the phase difference threshold range to which the phase difference between the first phase and the second phase belongs, it is determined whether the mutual inductor corresponding to the first phase and the mutual inductor corresponding to the second phase are reversed, which can automatically detect whether the wiring of the mutual inductor is reversed, and improve the detection efficiency of the mutual inductor wiring.

Description

Technical Field

[0001] This application relates to the field of low-voltage electrical appliances, and in particular to a method for testing the wiring of an instrument transformer, a universal circuit breaker and its equipment. Background Technology

[0002] Universal circuit breakers have grounding protection functions, and the orientation of the current transformer is extremely important. Existing products collect current through air-core transformers, which then feed the signal back to the MCU for processing. However, if the leads at the beginning and end of the air-core coil in one or more phase air-core transformers are reversed compared to those in other phase air-core transformers, a 180° phase difference waveform will be created, which can easily cause false grounding protection trips. For example, if only the N-phase transformer is installed in reverse, the leads at the beginning and end of the air-core coil in the N-phase transformer will be reversed compared to those in other phase transformers.

[0003] Currently, there is no automatic method for detecting the correct or reverse wiring of universal circuit breaker transformers. Summary of the Invention

[0004] The purpose of this application is to overcome the shortcomings of the prior art and provide a method for automatically detecting the correctness of current transformer wiring, thereby improving the detection efficiency of current transformer wiring.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] This application provides a method for detecting the wiring of a current transformer, including:

[0007] Acquire the detection signals of the current of each mutual sensor;

[0008] The phase difference between the first phase and the second phase is determined based on the detection signals of the first mutual sensor current and the second mutual sensor current in each mutual sensor current.

[0009] Based on the phase difference threshold range between the first and second phases, determine whether the current transformers corresponding to the first and second phases are reversed.

[0010] Optionally, if the first phase is phase A and the second phase is phase B, then based on the phase difference threshold range to which the phase difference between the first and second phases belongs, determine whether the current transformers corresponding to the first and second phases are reversed, including:

[0011] If the phase difference between phase A and phase B is within the first preset angle range, then the wiring of mutual sensor A and mutual sensor B is normal.

[0012] If the phase difference between phase A and phase B is within the second preset angle range, then the sensors of phase B are reversed.

[0013] If the first phase is phase A and the second phase is phase C, then based on the phase difference threshold range between the first and second phases, determine whether the current transformers corresponding to the first and second phases are reversed, including:

[0014] If the phase difference between phase A and phase C is within the third preset angle range, then the wiring of mutual sensor A and mutual sensor B is normal.

[0015] If the phase difference between phase A and phase C is within the fourth preset angle range, then the C phase sensors are reversed.

[0016] Optionally, the detection signals of the currents of each mutual inductor are acquired, including:

[0017] The comparator receives the rising or falling edge signal of the current of each mutual inductor sent by the comparator circuit, wherein the input terminal of the comparator circuit is connected to each mutual inductor.

[0018] or,

[0019] The current of each mutual inductor is sampled by an AD converter to obtain multiple AD values ​​for each mutual inductor current.

[0020] Optionally, if the detection signal of each mutual inductor current is multiple AD values ​​for each mutual inductor current, then determining the phase difference between the first phase and the second phase based on the detection signal of the first mutual inductor current and the detection signal of the second mutual inductor current includes:

[0021] The AD values ​​of the first mutual inductor current and the second mutual inductor current are respectively set to the first value for the AD value in the positive half-wave and the second value for the AD value in the negative half-wave, to obtain multiple marked values ​​of the first mutual inductor current and multiple marked values ​​of the second mutual inductor current.

[0022] The phase difference between the first phase and the second phase is calculated based on multiple marked values ​​of the first mutual inductor current and multiple marked values ​​of the second mutual inductor current.

[0023] Optionally, the phase difference between the first phase and the second phase is calculated based on multiple marked values ​​of the first mutual inductor current and multiple marked values ​​of the second mutual inductor current, including:

[0024] The multiple marked values ​​of the first mutual inductor current are shifted one position in one direction to form a new set of multiple marked values ​​of the first mutual inductor current.

[0025] The new multiple marker values ​​of the first mutual sensor current are compared with the multiple marker values ​​of the second mutual sensor current until the new multiple marker values ​​of the first mutual sensor current are equal to the multiple marker values ​​of the second mutual sensor current, and then the movement stops.

[0026] Count the number of displacements of multiple marker values ​​of the first mutual inductor current;

[0027] The phase difference between the first phase and the second phase is calculated based on the number of displacements of multiple marked values ​​of the first mutual inductor current.

[0028] Optionally, if the detection signal of each mutual inductor current is multiple AD values ​​for each mutual inductor current, the method further includes:

[0029] The result is obtained by reversing the connection of the first mutual sensor or the second mutual sensor.

[0030] Multiple AD values ​​of the first mutual inductor current or multiple AD values ​​of the second mutual inductor current are treated symmetrically with reference points.

[0031] Optionally, the method further includes:

[0032] After the reference point symmetry processing, the multiple AD values ​​of each mutual inductor current are vector summed to obtain multiple first AD values;

[0033] The AD values ​​located in the positive half-wave are set as the first value and the AD values ​​located in the negative half-wave are set as the second value to obtain multiple first mark values;

[0034] Compare multiple first marker values ​​with multiple marker values ​​of the N mutual inductor current;

[0035] If multiple first mark values ​​are equal to multiple mark values ​​of the N mutual inductor current, then the N mutual inductor is reversed;

[0036] If multiple first mark values ​​are equal to multiple mark values ​​of the N mutual transformer current, then the N mutual transformer wiring is normal.

[0037] Optionally, after the N mutual sensors are reversed, the method further includes:

[0038] The multiple AD values ​​of the N mutual inductor current are treated symmetrically as a reference point.

[0039] Optionally, if the detection signal of each mutual sensor current is a rising edge signal or a falling edge signal of each mutual sensor current, then determining the phase difference between the first phase and the second phase based on the detection signal of the first mutual sensor current and the detection signal of the second mutual sensor current includes:

[0040] The phase difference between the first phase and the second phase is determined based on the timing of the detection signals of the first mutual inductor current and the second mutual inductor current.

[0041] Optionally, the method further includes:

[0042] The current of each mutual inductor is sampled by an AD converter to obtain multiple AD values ​​for each mutual inductor current.

[0043] Multiple AD values ​​of the corresponding mutual transformer currents corresponding to reverse connection of mutual transformers are treated symmetrically with reference points.

[0044] After the reference point symmetry processing, the multiple AD values ​​of each mutual inductor current are vector summed to obtain multiple second AD values;

[0045] The AD values ​​located in the positive half-wave are set to the first value and the AD values ​​located in the negative half-wave are set to the second value to obtain multiple second mark values;

[0046] Compare multiple second-mark values ​​with multiple mark values ​​of the N mutual inductor current;

[0047] If multiple second mark values ​​are equal to multiple mark values ​​of the N mutual inductor current, then the N mutual inductor is reversed;

[0048] If multiple second mark values ​​are not equal to multiple mark values ​​of the N mutual transformer current, then the N mutual transformer wiring is normal.

[0049] Optionally, after the N mutual sensors are reversed, the method further includes:

[0050] The multiple AD values ​​of the N mutual inductor current are treated symmetrically as a reference point.

[0051] This application also provides a universal circuit breaker, including each mutual inductor and an MCU connected to each mutual inductor, wherein the MCU is used to execute the above-described method.

[0052] This application embodiment also provides a current transformer wiring detection device, including: one or more processors and one or more memories storing computer programs;

[0053] The one or more processors are configured to execute the computer program for performing the methods described above.

[0054] In some embodiments of this application, the current transformer wiring detection device acquires the detection signals of the current of each current transformer. Based on the detection signals of the first current transformer and the second current transformer, the current transformer wiring detection device determines the phase difference between the first phase and the second phase. Based on the phase difference threshold range to which the phase difference between the first phase and the second phase belongs, the device determines whether the first corresponding current transformer and the second corresponding current transformer are connected in reverse. This can automatically detect whether the wiring of the current transformer is reversed, thereby improving the detection efficiency of the correct and reverse wiring of the current transformer. Attached Figure Description

[0055] Figure 1 A flowchart illustrating a current transformer wiring detection method provided in an embodiment of this application;

[0056] Figure 2 A more detailed flowchart illustrating another transformer wiring detection method provided for an exemplary embodiment of this application;

[0057] Figure 3 A flowchart illustrating another transformer wiring detection method provided for an exemplary embodiment of this application;

[0058] Figure 4 A schematic diagram of a process for detecting the wiring of an N mutual inductor, provided as an exemplary embodiment of this application;

[0059] Figure 5 This is a schematic diagram of the structure of a current transformer wiring detection device provided as an exemplary embodiment of this application. Detailed Implementation

[0060] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0061] To address the existing technical problems, in some embodiments of this application, the current transformer wiring detection device acquires the detection signals of the current of each current transformer. Based on the detection signals of the first current transformer and the second current transformer, the current transformer wiring detection device determines the phase difference between the first phase and the second phase. Based on the phase difference threshold range to which the phase difference between the first phase and the second phase belongs, it determines whether the first corresponding current transformer and the second corresponding current transformer are connected in reverse. This can automatically detect whether the current transformer wiring is reversed, improving the detection efficiency of the correct and reversed current transformer wiring.

[0062] The technical solutions provided by the various embodiments of this application are described in detail below with reference to the accompanying drawings.

[0063] Figure 1 This is a flowchart illustrating a universal circuit breaker transformer wiring detection method provided in an embodiment of this application. Figure 1 As shown, the method includes:

[0064] S101: Acquire the detection signals of the current of each mutual sensor;

[0065] S102: Determine the phase difference between the first phase and the second phase based on the detection signals of the first mutual sensor current and the second mutual sensor current in each mutual sensor current.

[0066] S103: Determine whether the current transformers corresponding to the first phase and the second phase are reversed based on the phase difference threshold range between the first phase and the second phase.

[0067] In this embodiment, the instrument transformer wiring detection device, which is the executing entity of the above method, is an MCU within a universal circuit breaker. It can also be a computer device or a server. When the executing entity of the above method is a server, the implementation form of the server is not limited. For example, it can be a conventional server, a cloud server, a cloud host, a virtual center, or other server equipment. The server equipment mainly includes a processor, hard disk, memory, system bus, and a common computer architecture type. Furthermore, the aforementioned universal circuit breaker instrument transformer wiring detection device can be integrated onto the universal circuit breaker.

[0068] In this embodiment, the transformer wiring detection device is an MCU inside a universal circuit breaker. The transformer wiring detection device acquires the detection signals of the current of each transformer. Based on the detection signals of the first transformer current and the second transformer current, the transformer wiring detection device determines the phase difference between the first phase and the second phase. Based on the phase difference threshold range to which the phase difference between the first phase and the second phase belongs, the device determines whether the first corresponding transformer and the second corresponding transformer are connected in reverse.

[0069] For example, if the first phase is phase A and the second phase is phase B, and the phase difference between phase A and phase B is within a first preset angle range, then the wiring of the A and B mutual inductors is normal; if the phase difference between phase A and phase B is within a second preset angle range, then the B mutual inductor is reversed. This application does not limit the first and second preset angle ranges; the first preset angle range can be 120°±11.25°, and the second preset angle range can be 300°±11.25°.

[0070] If the first phase is phase A and the second phase is phase C, and the phase difference between phase A and phase C falls within a third preset angle range, then the wiring of mutual inductors A and B is normal; if the phase difference between phase A and phase C falls within a fourth preset angle range, then mutual inductor C is reversed. This application does not limit the third and fourth preset angle ranges; the third preset angle range can be 240°±11.25°, and the fourth preset angle range can be 60°±11.25°.

[0071] It should be noted that the embodiments of this application do not limit the range of the phase difference threshold, and the range of the phase difference threshold can be described according to the actual situation.

[0072] In this embodiment, the current transformer wiring detection device acquires the detection signals of the current of each current transformer. One possible implementation is to receive the rising edge signal or falling edge signal of each current transformer sent by a comparator circuit, wherein the input terminal of the comparator circuit is connected to each current transformer. Another possible implementation is to perform AD sampling on each current transformer to obtain multiple AD values ​​for each current transformer. For example, AD sampling is performed on the current of each phase (A, B, C, N) for at least one cycle, resulting in 32 AD values ​​for each current transformer.

[0073] Figure 2 A more detailed flowchart illustrating another universal circuit breaker transformer wiring detection method provided for an exemplary embodiment of this application is shown below. Figure 2 As shown, in the above embodiment, if the detection signal of each mutual inductor current is multiple AD values ​​for each mutual inductor current, then the phase difference between the first phase and the second phase is determined based on the detection signals of the first mutual inductor current and the second mutual inductor current. One possible implementation is to set the AD values ​​in the positive half-wave of the multiple AD values ​​of the first mutual inductor current and the multiple AD values ​​of the multiple AD values ​​of the second mutual inductor current to a first value and the AD values ​​in the negative half-wave to a second value, respectively, to obtain multiple marked values ​​for the first mutual inductor current and multiple marked values ​​for the second mutual inductor current; based on the multiple marked values ​​of the first mutual inductor current and the multiple marked values ​​of the second mutual inductor current, the phase difference between the first phase and the second phase is calculated. For example, the AD values ​​in the positive half-wave of the currents of phases A, B, C, and N are set to 1, and the AD values ​​in the negative half-wave are set to 0.

[0074] In the above embodiments, the phase difference between the first phase and the second phase is calculated based on multiple marked values ​​of the first mutual inductor current and multiple marked values ​​of the second mutual inductor current. One possible approach is to move the multiple marked values ​​of the first mutual inductor current by one position in one direction to form new multiple marked values ​​of the first mutual inductor current; compare the new multiple marked values ​​of the first mutual inductor current with the multiple marked values ​​of the second mutual inductor current until the new multiple marked values ​​of the first mutual inductor current equal to the multiple marked values ​​of the second mutual inductor current, and then stop moving; count the number of displacements of the multiple marked values ​​of the first mutual inductor current; and calculate the phase difference between the first phase and the second phase based on the number of displacements of the multiple marked values ​​of the first mutual inductor current. For example, the multiple marker values ​​of phase A are cyclically shifted to the right (from the original 32nd marker value to the 1st position) to form new marker values. These new marker values ​​of phase A are then compared with the marker values ​​of phase B. This process continues until the new marker values ​​of the mutual inductor currents in phase A and phase B are equal. The phase difference between phase A and phase B is calculated as (number of right shifts × (360 ÷ 32)). Similarly, the phase difference between phase A and phase C is calculated using the same method.

[0075] In the above embodiments, the display interface of the universal circuit breaker will provide an information prompt for the phase with the transformer connected in reverse. Multiple AD values ​​of the first or second mutual transformer current will be symmetrically processed using a reference point. For example, assuming the reference point is 0 and the AD sampling points are 8 points ({0, 1, 2, 1, 0, -1, -2, -1}), the AD sampling points after symmetrical processing will be {0, -1, -2, -1, 0, 1, 2, 1}. Automatic processing is performed on the phase with the transformer connected in reverse to prevent grounding vector and protection tripping caused by non-power system problems.

[0076] In the above embodiment, after obtaining the wiring orientation results of phase A, phase B, and phase C mutual inductors, it is determined whether the N mutual inductor is connected in reverse. One possible approach is to perform vector sum calculation on the multiple AD values ​​of each mutual inductor current after symmetrical processing at the reference point to obtain multiple first AD values; set the AD values ​​located in the positive half-wave of the multiple first AD values ​​as first values ​​and the AD values ​​located in the negative half-wave as second values ​​to obtain multiple first mark values; compare the multiple first mark values ​​with the multiple mark values ​​of the N mutual inductor current; if the multiple first mark values ​​are equal to the multiple mark values ​​of the N mutual inductor current, then the N mutual inductor is connected in reverse; if the multiple first mark values ​​are not equal to the multiple mark values ​​of the N mutual inductor current, then the N mutual inductor wiring is normal. For example, the first AD value of each of phases A, B, and C is taken sequentially and vector summed. The second AD value is then vector summed, and so on, until the 32nd AD value is vector summed. This generates a new set of 32 AD sampling data, i.e., the first AD value. The AD values ​​in the positive half-wave are set to 1, and the AD values ​​in the negative half-wave are set to 0, resulting in multiple first marker values. These multiple first marker values ​​are compared with multiple marker values ​​of the N mutual transformer current. If the multiple first marker values ​​are equal to the multiple marker values ​​of the N mutual transformer current, then the N mutual transformer is reversed. If the multiple first marker values ​​are not equal to the multiple marker values ​​of the N mutual transformer current, then the N mutual transformer is properly connected.

[0077] In the above embodiment, the phase with the N-phase mutual inductor reversed is displayed as an information prompt on the interface. After the N-phase mutual inductor is reversed, the multiple AD values ​​of the N-phase mutual inductor current are symmetrically processed using a reference point. The symmetrical processing of the N-phase mutual inductor reference point can be referred to the aforementioned methods for symmetrical processing of the reference points of other phases, and will not be repeated here.

[0078] Figure 3 This is a flowchart illustrating another universal circuit breaker transformer wiring detection method provided as an exemplary embodiment of this application. Figure 3As shown, if the detection signal is the rising edge or falling edge signal of each mutual transformer current sent by the comparator circuit, the phase difference between the first and second phases is determined based on the detection signals of the first and second mutual transformer currents. One possible approach is to determine the phase difference between the first and second phases based on the count of the first and second mutual transformer current detection signals. For example, taking a timer in a universal circuit breaker transformer wiring detection device that counts in 1ms increments as an example, the phase difference = count / (1000 / 50) * 360. It should be noted that the comparator circuit performs zero-crossing detection on the A, B, and C phase signals from the transformers. It can choose to detect the zero point from the negative half-wave to the positive half-wave, or vice versa; and feeds the signal back to the MCU. This method preferably detects the zero point from the negative half-wave to the positive half-wave, using the A-phase signal as a reference point, and feeding back the rising edge signal.

[0079] In the above embodiment, based on the phase difference threshold range to which the phase difference between the first phase and the second phase belongs, it is determined whether the current transformers corresponding to the first phase and the second phase are reversed. If the phase difference between phase A and phase B is within the range of 120°±18°, then the wiring of current transformers A and B is normal; if the phase difference between phase A and phase B is within the range of 300°±18°, then current transformer B is reversed; if the phase difference between phase A and phase C is within the range of 240°±18°, then the wiring of current transformers A and B is normal; if the phase difference between phase A and phase C is within the range of 60°±18°, then current transformer C is reversed.

[0080] Figure 4 This is a schematic diagram illustrating the process of detecting the wiring of an N-type mutual inductor, provided as an exemplary embodiment of this application. Figure 4 As shown, in the above embodiment, after obtaining the wiring directions of the A-phase, B-phase, and C-phase mutual inductors, it is determined whether the N-phase mutual inductor is reversed. One possible approach is to perform AD sampling on the current of each mutual inductor to obtain multiple AD values ​​for each current; perform reference point symmetry processing on the multiple AD values ​​of the corresponding mutual inductor currents that correspond to reversed current connections; perform vector sum calculation on the multiple AD values ​​of each mutual inductor current after reference point symmetry processing to obtain multiple second AD values; set the AD values ​​located in the positive half-wave of the multiple second AD values ​​as first values ​​and the AD values ​​located in the negative half-wave as second values ​​to obtain multiple second marker values; compare the multiple second marker values ​​with the multiple marker values ​​of the N-phase mutual inductor current; if the multiple second marker values ​​are equal to the multiple marker values ​​of the N-phase mutual inductor current, then the N-phase mutual inductor is reversed; if the multiple second marker values ​​are not equal to the multiple marker values ​​of the N-phase mutual inductor current, then the N-phase mutual inductor wiring is normal.

[0081] In the above embodiment, the phase with the N-phase mutual inductor reversed is displayed as an information prompt on the interface. After the N-phase mutual inductor is reversed, the multiple AD values ​​of the N-phase mutual inductor current are symmetrically processed using a reference point. The symmetrical processing of the N-phase mutual inductor reference point can be referred to the aforementioned methods for symmetrical processing of the reference points of other phases, and will not be repeated here.

[0082] The transformer wiring detection device in this embodiment is a universal circuit breaker, including each transformer and an MCU connected to each transformer. The MCU is used to execute the above-described method. A current sampling circuit is connected between the MCU and each transformer. As needed, corresponding amplification, filtering, and analog-to-digital conversion circuits can also be set. The above-described circuits are prior art in this field and will not be described in detail.

[0083] In the above-described method embodiments of this application, the transformer wiring detection device acquires the detection signals of the currents of each transformer. Based on the detection signals of the first and second transformer currents, the device determines the phase difference between the first and second phases. According to the phase difference threshold range to which the phase difference between the first and second phases belongs, it determines whether the first and second corresponding transformers are connected in reverse. This automatically detects whether the wiring of the universal circuit breaker transformer is reversed, improving the detection efficiency of the universal circuit breaker transformer wiring. It should be noted that the execution subject of each step in the method provided in the above embodiments can be the same device, or the method can be executed by different devices. For example, the execution subject of steps 101 to 103 can be device A; or, for example, the execution subject of steps 101 and 102 can be device A, and the execution subject of step 103 can be device B; and so on.

[0084] Furthermore, some processes described in the above embodiments and accompanying drawings include multiple operations appearing in a specific order. However, it should be clearly understood that these operations may not be executed in the order they appear herein, or they may be executed in parallel. The operation numbers, such as 101, 102, etc., are merely used to distinguish different operations and do not represent any execution order. Additionally, these processes may include more or fewer operations, and these operations may be executed sequentially or in parallel. It should be noted that the descriptions such as "first" and "second" in this document are used to distinguish different messages, devices, modules, etc., and do not represent a sequential order, nor do they limit "first" and "second" to different types.

[0085] Figure 5 This is a schematic diagram of the structure of a current transformer wiring detection device provided as an exemplary embodiment of this application. Figure 5 As shown, the device includes a memory 501 and a processor 502. Additionally, the device includes necessary components such as a power supply component 503 and a communication component 504.

[0086] Memory 501 is used to store computer programs and can be configured to store various other data to support operation on the universal circuit breaker transformer wiring test equipment. Examples of this data include instructions for any application or method used to operate on the universal circuit breaker transformer wiring test equipment.

[0087] The memory 501 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk or optical disk.

[0088] Communication component 504 is used for data transmission with other devices.

[0089] The processor 502 can execute computer instructions stored in the memory 501 to: acquire detection signals of the current of each mutual inductor; determine the phase difference between the first phase and the second phase based on the detection signals of the first mutual inductor current and the second mutual inductor current; and determine whether the first corresponding mutual inductor and the second corresponding mutual inductor are connected in reverse according to the phase difference threshold range to which the phase difference between the first phase and the second phase belongs.

[0090] Optionally, if the first phase is phase A and the second phase is phase B, the processor 502 determines whether the current transformers corresponding to the first phase and the second phase are reversed based on the phase difference threshold range to which the phase difference between the first phase and the second phase belongs. Specifically, if the phase difference between phase A and phase B is within the range of the first preset angle, then the wiring of the current transformers A and B is normal; if the phase difference between phase A and phase B is within the range of the second preset angle, then the current transformer B is reversed.

[0091] If the first phase is phase A and the second phase is phase C, then the processor 502 determines whether the current transformers corresponding to the first phase and the second phase are reversed based on the phase difference threshold range to which the phase difference between the first phase and the second phase belongs. Specifically, if the phase difference between phase A and phase C is within the range of the third preset angle, then the wiring of the A and B current transformers is normal; if the phase difference between phase A and phase C is within the range of the fourth preset angle, then the C current transformer is reversed.

[0092] Optionally, when acquiring the detection signal of each mutual inductor current, the processor 502 is specifically used to: receive the rising edge signal or falling edge signal of each mutual inductor current sent by the comparator circuit, wherein the input terminal of the comparator circuit is connected to each mutual inductor; or, perform AD sampling on each mutual inductor current for at least one cycle to obtain multiple AD values ​​for each mutual inductor current.

[0093] Optionally, if the detection signal of each mutual inductor current is multiple AD values ​​for each mutual inductor current, then when the processor 502 determines the phase difference between the first phase and the second phase based on the detection signals of the first mutual inductor current and the second mutual inductor current, it specifically performs the following steps: setting the AD values ​​in the positive half-wave of the multiple AD values ​​of the first mutual inductor current and the multiple AD values ​​of the second mutual inductor current to first values ​​and setting the AD values ​​in the negative half-wave to second values, respectively, to obtain multiple marked values ​​of the first mutual inductor current and multiple marked values ​​of the second mutual inductor current; and calculating the phase difference between the first phase and the second phase based on the multiple marked values ​​of the first mutual inductor current and the multiple marked values ​​of the second mutual inductor current.

[0094] Optionally, when the processor 502 calculates the phase difference between the first phase and the second phase based on the multiple marked values ​​of the first mutual inductor current and the multiple marked values ​​of the second mutual inductor current, it specifically performs the following steps: moving the multiple marked values ​​of the first mutual inductor current one position in one direction to form new multiple marked values ​​of the first mutual inductor current; comparing the new multiple marked values ​​of the first mutual inductor current with the multiple marked values ​​of the second mutual inductor current until the new multiple marked values ​​of the first mutual inductor current are equal to the multiple marked values ​​of the second mutual inductor current, and then stopping the movement; counting the number of displacements of the multiple marked values ​​of the first mutual inductor current; and calculating the phase difference between the first phase and the second phase based on the number of displacements of the multiple marked values ​​of the first mutual inductor current.

[0095] Optionally, if the detection signal of each mutual sensor current is multiple AD values ​​of each mutual sensor current, the processor 502 can also be used to: obtain the result of the first mutual sensor being connected in reverse or the second mutual sensor being connected in reverse; and perform symmetrical processing on the multiple AD values ​​of the first mutual sensor current or the multiple AD values ​​of the second mutual sensor current using a reference point.

[0096] Optionally, the processor 502 can also be used to: perform vector sum calculation on the multiple AD values ​​of each mutual inductor current after the reference point symmetry processing to obtain multiple first AD values; set the AD value located in the positive half-wave of the multiple first AD values ​​as the first value and the AD value located in the negative half-wave as the second value to obtain multiple first mark values; compare the multiple first mark values ​​with the multiple mark values ​​of the N mutual inductor current; if the multiple first mark values ​​are equal to the multiple mark values ​​of the N mutual inductor current, then the N mutual inductor is reversed; if the multiple first mark values ​​are equal to the multiple mark values ​​of the N mutual inductor current, then the N mutual inductor is properly connected.

[0097] Optionally, after the N mutual inductors are reversed, the processor 502 can also be used to: perform symmetrical processing of multiple AD values ​​of the N mutual inductor currents using a reference point.

[0098] Optionally, if the detection signal of each mutual sensor current is the rising edge signal or the falling edge signal of each mutual sensor current, then when the processor 502 determines the phase difference between the first phase and the second phase based on the detection signal of the first mutual sensor current and the detection signal of the second mutual sensor current, it is specifically used to: determine the phase difference between the first phase and the second phase based on the count of the detection signals of the first mutual sensor current and the second mutual sensor current.

[0099] Optionally, the processor 502 can also be used to: perform AD sampling on the current of each mutual inductor to obtain multiple AD values ​​for each mutual inductor current; perform reference point symmetry processing on the multiple AD values ​​of the corresponding mutual inductor currents corresponding to reversed mutual inductor connection; perform vector sum calculation on the multiple AD values ​​of each mutual inductor current after reference point symmetry processing to obtain multiple second AD values; set the AD value located in the positive half-wave of the multiple second AD values ​​as the first value and the AD value located in the negative half-wave as the second value to obtain multiple second mark values; compare the multiple second mark values ​​with the multiple mark values ​​of the N mutual inductor current; if the multiple second mark values ​​are equal to the multiple mark values ​​of the N mutual inductor current, then the N mutual inductor is reversed; if the multiple second mark values ​​are not equal to the multiple mark values ​​of the N mutual inductor current, then the N mutual inductor is properly connected.

[0100] Optionally, after the N mutual inductors are reversed, the processor 502 can also be used to: perform symmetrical processing of multiple AD values ​​of the N mutual inductor currents using a reference point.

[0101] Accordingly, embodiments of this application also provide a computer-readable storage medium storing a computer program. When the computer-readable storage medium stores a computer program, and the computer program is executed by one or more processors, it causes one or more processors to perform... Figure 1 Each step in the method embodiment.

[0102] The above Figure 5 The communication component is configured to facilitate wired or wireless communication between the device containing the communication component and other devices. The device containing the communication component can access wireless networks based on communication standards, such as WiFi, 2G, 3G, 4G / LTE, 5G, or combinations thereof. In one exemplary embodiment, the communication component receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, the communication component also includes a Near Field Communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID), Infrared Data Association (IrDA) technology, Ultra-Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0103] The above Figure 5 The power supply component provides power to the various components of the device in which it resides. The power supply component may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to the device in which it resides.

[0104] The aforementioned universal circuit breaker and instrument transformer wiring testing equipment may also include a display and audio components.

[0105] The display includes a screen, which may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen can be implemented as a touchscreen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors can sense not only the boundaries of touch or swipe actions but also the duration and pressure associated with the touch or swipe operation.

[0106] An audio component may be configured to output and / or input audio signals. For example, the audio component includes a microphone (MIC) configured to receive external audio signals when the device containing the audio component is in an operating mode, such as call mode, recording mode, or voice recognition mode. The received audio signals may be further stored in memory or transmitted via a communication component. In some embodiments, the audio component also includes a speaker for outputting audio signals.

[0107] In the embodiments of the device and storage medium described above in this application, the universal circuit breaker transformer wiring detection device acquires the detection signals of the current of each transformer. Based on the detection signals of the first transformer current and the second transformer current, the universal circuit breaker transformer wiring detection device determines the phase difference between the first phase and the second phase. Based on the phase difference threshold range to which the phase difference between the first phase and the second phase belongs, it determines whether the first corresponding transformer and the second corresponding transformer are connected in reverse. This device can automatically detect whether the wiring of the universal circuit breaker transformer is reversed, thereby improving the detection efficiency of the correct and reverse wiring of the universal circuit breaker transformer.

[0108] 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 a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0109] 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.

[0110] 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.

[0111] 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 1One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0112] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0113] Memory may include non-persistent storage in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0114] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0115] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0116] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of this application and should not be construed as limiting the specific implementation of this application to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of this application, and all such modifications or substitutions should be considered within the scope of protection of this application.

Claims

1. A method for detecting the wiring of a current transformer, characterized in that, include: Acquire the detection signals of the current of each mutual sensor; The phase difference between the first phase and the second phase is determined based on the detection signals of the first mutual sensor current and the second mutual sensor current in each mutual sensor current. Based on the phase difference threshold range between the first phase and the second phase, determine whether the current transformers corresponding to the first phase and the second phase are reversed. Acquiring the detection signal of each mutual inductor current includes: performing AD sampling on each mutual inductor current for at least one cycle to obtain multiple AD values ​​for each mutual inductor current. The phase difference between the first phase and the second phase is determined based on the detection signals of the first mutual sensor current and the second mutual sensor current in each mutual sensor current. The AD values ​​of the first mutual inductor current and the second mutual inductor current are respectively set to the first value for the AD value in the positive half-wave and the second value for the AD value in the negative half-wave, to obtain multiple marked values ​​of the first mutual inductor current and multiple marked values ​​of the second mutual inductor current. Based on multiple marked values ​​of the first mutual inductor current and multiple marked values ​​of the second mutual inductor current, the phase difference between the first phase and the second phase is calculated, including: The multiple marked values ​​of the first mutual inductor current are shifted one position in one direction to form a new set of multiple marked values ​​of the first mutual inductor current. The new multiple marker values ​​of the first mutual sensor current are compared with the multiple marker values ​​of the second mutual sensor current until the new multiple marker values ​​of the first mutual sensor current are equal to the multiple marker values ​​of the second mutual sensor current, and then the movement stops. Count the number of displacements of multiple marker values ​​of the first mutual inductor current; The phase difference between the first phase and the second phase is calculated based on the number of displacements of multiple marked values ​​of the first mutual inductor current.

2. The transformer wiring detection method according to claim 1, characterized in that, If the first phase is phase A and the second phase is phase B, then based on the phase difference threshold range between the first and second phases, determine whether the current transformers corresponding to the first and second phases are reversed, including: If the phase difference between phase A and phase B is within the first preset angle range, then the wiring of mutual sensor A and mutual sensor B is normal. If the phase difference between phase A and phase B is within the second preset angle range, then the sensors of phase B are reversed. If the first phase is phase A and the second phase is phase C, then based on the phase difference threshold range between the first and second phases, determine whether the current transformers corresponding to the first and second phases are reversed, including: If the phase difference between phase A and phase C is within the third preset angle range, then the wiring of mutual sensor A and mutual sensor B is normal. If the phase difference between phase A and phase C is within the fourth preset angle range, then the C phase sensors are reversed.

3. The transformer wiring detection method according to claim 1, characterized in that, If the detection signal of each mutual inductor current is multiple AD values ​​for each mutual inductor current, the method further includes: The result is obtained by reversing the connection of the first mutual sensor or the second mutual sensor. Multiple AD values ​​of the first mutual inductor current or multiple AD values ​​of the second mutual inductor current are treated symmetrically with reference points.

4. The transformer wiring detection method according to claim 3, characterized in that, The method further includes: After the reference point symmetry processing, the multiple AD values ​​of each mutual inductor current are vector summed to obtain multiple first AD values; The AD values ​​located in the positive half-wave are set as the first value and the AD values ​​located in the negative half-wave are set as the second value to obtain multiple first mark values; Compare multiple first marker values ​​with multiple marker values ​​of the N mutual inductor current; If multiple first mark values ​​are equal to multiple mark values ​​of the N mutual inductor current, then the N mutual inductor is reversed; If multiple first mark values ​​are not equal to multiple mark values ​​of the N mutual transformer current, then the N mutual transformer wiring is normal.

5. The transformer wiring detection method according to claim 4, characterized in that, After the N mutual inductors are reversed, the method further includes: The multiple AD values ​​of the N mutual inductor current are treated symmetrically as a reference point.

6. A universal circuit breaker, comprising mutual inductors and an MCU connected to each mutual inductor, characterized in that, The MCU is used to execute the method according to any one of claims 1-5.

7. A current transformer wiring testing device, characterized in that, include: One or more processors and one or more memories storing computer programs; The one or more processors are configured to execute the computer program for performing the method of any one of claims 1-5.

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