Circuit breaker three-phase signal positioning method and device and electronic equipment

Abstract

The invention discloses a circuit breaker three-phase signal positioning method and device and electronic equipment, and relates to the field of power equipment. And the three-phase signal can be simply and quickly positioned. The circuit breaker three-phase signal positioning method comprises the following steps: acquiring electromagnetic wave signals received by an omnidirectional antenna and electromagnetic wave signals respectively received by three directional antennas; denoising the electromagnetic wave signal received by the omnidirectional antenna to obtain an effective signal; extracting a first signal, a second signal and a third signal from electromagnetic wave signals respectively received by the three directional antennas based on the effective signals; extracting peak values of the first signal, the second signal and the third signal, and arranging the peak values according to a time sequence to obtain a peak value matrix; and determining the time sequence of the three-phase signal according to the time sequence of the maximum peak value in the peak value matrix, and extracting the A-phase signal, the B-phase signal and the C-phase signal from the first signal, the second signal and the third signal according to the time sequence of the three-phase signal.

Description

Technical Field

[0001] This application relates to the field of power equipment, and in particular to a method, apparatus and electronic device for locating three-phase signals of a circuit breaker. Background Technology

[0002] During the circuit breaker's opening process, electromagnetic wave signals are radiated into the external space of the arc-extinguishing chamber. The breaking capacity of the circuit breaker is related to various factors such as gas characteristics, mechanical characteristics, and insulation structure. At the same time, these factors also determine the electromagnetic wave signals radiated into the space during the circuit breaker's opening process.

[0003] Circuit breakers with good arc-extinguishing characteristics will not generate excessive discharge signals during operation, while circuit breakers with high erosion levels will produce abnormal electromagnetic wave signals. Therefore, the electromagnetic wave signals radiated into space during circuit breaker operation are rich in information, and the arc-extinguishing characteristics of the circuit breaker can be evaluated using these radiated electromagnetic wave signals.

[0004] The extracted electromagnetic wave signals radiated due to circuit breaker operation are composed of signals emitted from the three-phase arc-extinguishing chambers of the circuit breaker and can only characterize the overall arc-extinguishing performance of the three phases. If only one or two phase arc-extinguishing chambers are deteriorated, it is impossible to locate the deteriorated phase. Locating three-phase fault signals is particularly important and is a major focus and challenge in current circuit breaker fault analysis and maintenance. If the fault can be accurately and quickly identified after a circuit breaker failure, the maintenance efficiency of high-voltage circuit breaker equipment will be greatly improved, thereby reducing power outage time and enhancing power supply stability.

[0005] Currently, in the field of power engineering, the closest method to the three-phase signal separation and positioning of circuit breakers is the UHF method for partial discharge source positioning. Its basic idea is the Time Difference of Arrival (TDOA) method, which uses multiple UHF sensors placed at different locations on the transformer to receive partial discharge signals. An equation is established by calculating the time delay between different sensors, and a spatial positioning algorithm is used to spatially locate the partial discharge source. However, this traditional time-difference-based positioning method has high requirements for sensor sampling rate and spacing, heavily relies on high-precision time delay estimation, and needs to handle multipath interference and noise effects. It also has high algorithm complexity and long computation time. Summary of the Invention

[0006] This application provides a method, apparatus, and electronic device for locating three-phase signals of a circuit breaker, which can locate the signal source without relying on signal accuracy.

[0007] In a first aspect, this application provides a three-phase signal positioning method for a circuit breaker. An array antenna is arranged around the circuit breaker, comprising three directional antennas and one omnidirectional antenna. The three directional antennas are respectively facing the A, B, and C phases of the circuit breaker, and the omnidirectional antenna is positioned horizontally in front of the B phase of the circuit breaker. The method specifically includes: Acquire the electromagnetic wave signal received by the omnidirectional antenna, and the electromagnetic wave signals received by the three directional antennas respectively; The electromagnetic wave signal received by the omnidirectional antenna is denoised to obtain an effective signal; Based on the effective signal, the first signal, the second signal, and the third signal are extracted from the electromagnetic wave signals received by the three directional antennas respectively; The peak values ​​of the first signal, the second signal, and the third signal are extracted, and the peak values ​​are arranged in time sequence to obtain a peak matrix; Based on the timing of the maximum peak value in the peak matrix, the timing of the three-phase signals is determined, and the three-phase signals A, B, and C are extracted from the first, second, and third signals according to the timing of the three-phase signals.

[0008] According to the circuit breaker three-phase signal localization method provided in this embodiment, the electromagnetic wave signal generated by the circuit breaker is received by a compact array antenna including four antennas. The phase order of the signal can be determined by the difference in signals between the three directional antennas. Compared with the traditional time difference method, which relies on high-precision time delay estimation and needs to deal with multipath interference and noise, the compact array antenna utilizes the directional receiving characteristics of directional antennas to directly correlate the signal source phase order through the difference in signal amplitude. It eliminates the need for time delay estimation and nonlinear equation solving, requiring only maximum value determination of the amplitude matrix. The algorithm is simple and has strong real-time performance. Furthermore, based on microstrip antennas and conventional sampling equipment, the hardware cost is greatly reduced, and the algorithm is lightweight, meeting the needs of rapid on-site detection.

[0009] For example, determining the timing sequence of the three-phase signals based on the timing sequence of the maximum peak in the peak matrix includes: determining the phase order corresponding to the timing sequence of the maximum peak based on the directional antennas corresponding to the first, second, and third signals and the timing sequence of the maximum peak in the peak matrix.

[0010] For example, after arranging the peaks in time sequence to obtain a peak matrix, the method further includes: The peak matrix is ​​normalized according to the maximum peak value of each directional antenna.

[0011] For example, in the peak matrix, each row represents the first signal, the second signal, and the third signal, and each column represents the first timing sequence, the second timing sequence, and the third timing sequence, respectively. Determining the timing sequence of the three-phase signals based on the timing sequence of the maximum peak value in the peak matrix includes: if the timing sequence of the maximum peak value of the first signal is the first timing sequence, then the signal of the first timing sequence is the circuit breaker A-phase signal; if the timing sequence of the maximum peak value of the first signal is the second timing sequence, then the signal of the second timing sequence is the circuit breaker A-phase signal; if the timing sequence of the maximum peak value of the first signal is the third timing sequence, then the signal of the third timing sequence is the circuit breaker A-phase signal.

[0012] For example, the step of extracting the peak values ​​of the first signal, the second signal, and the third signal, and arranging the peak values ​​in time sequence to obtain a peak matrix includes: obtaining the difference in the receiving capability of the directional antenna; and separating the peak values ​​of the first signal, the second signal, and the third signal through the difference in receiving capability to obtain a peak matrix.

[0013] For example, after extracting the three-phase signals A, B, and C from the first, second, and third signals according to the timing of the three-phase signals, the method further includes: performing fault detection on the three phases A, B, and C of the circuit breaker based on the three-phase signals A, B, and C.

[0014] Secondly, this application provides a three-phase signal positioning device for a circuit breaker, comprising: An array antenna, used to receive electromagnetic wave signals generated when a circuit breaker operates; The first signal extraction module is used to denoise the electromagnetic wave signal received by the omnidirectional antenna to obtain an effective signal; The second signal extraction module is used to extract the first signal, the second signal, and the third signal from the electromagnetic wave signals received by the three directional antennas respectively based on the effective signal; The peak extraction module is used to extract the peak values ​​of the first signal, the second signal, and the third signal, and arrange the peak values ​​in time sequence to obtain a peak matrix; The signal positioning module is used to determine the timing sequence of the three-phase signals based on the timing sequence of the maximum peak value in the peak matrix, and to extract the three-phase signals A, B, and C from the first signal, the second signal, and the third signal based on the timing sequence of the three-phase signals.

[0015] The array antenna includes three directional antennas and one omnidirectional antenna. The three directional antennas are respectively facing the A, B, and C phases of the circuit breaker, and the omnidirectional antenna is positioned horizontally in front of the B phase of the circuit breaker.

[0016] Thirdly, this application provides an electronic device including a memory and one or more processors. The memory stores one or more computer programs, each including instructions that, when executed by the processor, cause the electronic device to perform the circuit breaker three-phase signal positioning method as described in the first aspect.

[0017] Fourthly, this application provides a computer-readable storage medium storing instructions that, when executed on an electronic device, cause the electronic device to perform the circuit breaker three-phase signal positioning method as described in the first aspect.

[0018] Fifthly, this application provides a computer program product that, when run on an electronic device, causes the electronic device to perform the circuit breaker three-phase signal positioning method as described in the first aspect.

[0019] It is understood that the beneficial effects achieved by the circuit breaker three-phase signal positioning device, electronic equipment, computer-readable storage medium, and computer program products provided above can be referred to the beneficial effects in the first aspect, and will not be repeated here. Attached Figure Description

[0020] Figure 1 A schematic flowchart illustrating the circuit breaker three-phase signal positioning method provided in this application embodiment; Figure 2 A schematic diagram of the array antenna architecture in the circuit breaker three-phase signal localization method provided in the embodiments of this application; Figure 3 This is a schematic diagram of the signal in the circuit breaker three-phase signal positioning method provided in the embodiments of this application; Figure 4 This is a schematic diagram of the structure of the three-phase signal positioning device for a circuit breaker provided in an embodiment of this application; Figure 5 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0021] To facilitate a clear description of the technical solutions in the embodiments of this application, the terms "first" and "second" are used in the embodiments of this application to distinguish identical or similar items with substantially the same function and effect. For example, "first chip" and "second chip" are only used to distinguish different chips and do not limit their order. Those skilled in the art will understand that the terms "first" and "second" do not limit the quantity or execution order, and the terms "first" and "second" do not necessarily imply that they are different. It should be noted that in the embodiments of this application, the words "exemplary" or "for example" are used to indicate that they are examples, illustrations, or descriptions. Any embodiment or design scheme described as "exemplary" or "for example" in this application should not be construed as being better or more advantageous than other embodiments or design schemes. Specifically, the use of the words "exemplary" or "for example" is intended to present the relevant concepts in a specific manner. In the embodiments of this application, "at least one" means one or more, and "more than one" means two or more.

[0022] It should be noted that "at the time of..." in the embodiments of this application can be either at the instant when a certain situation occurs, or for a period of time after the occurrence of a certain situation. The embodiments of this application do not make specific limitations on this.

[0023] The implementation of this embodiment will now be described in detail with reference to the accompanying drawings.

[0024] This embodiment provides a three-phase signal positioning method for circuit breakers. For example, this three-phase signal positioning method for circuit breakers can be applied to various electronic devices such as computers (PCs), tablets, virtual reality / augmented reality devices, wearable devices, and industrial computers; it can also be applied to servers, cloud computing, server clusters, etc. This embodiment does not impose any special limitations on it.

[0025] Figure 1 A flowchart illustrating the circuit breaker three-phase signal positioning method provided in an embodiment of this application is shown.

[0026] like Figure 1 As shown, the three-phase signal location method for the circuit breaker may include the following steps: Step 101: Obtain the electromagnetic wave signal received by the omnidirectional antenna and the electromagnetic wave signals received by the three directional antennas respectively.

[0027] In this embodiment, an array antenna can be arranged around the circuit breaker. This array antenna is a compact array antenna, specifically including three directional antennas and one omnidirectional antenna. The three directional antennas face directly towards phases A, B, and C of the circuit breaker, respectively, and the omnidirectional antenna is positioned horizontally in front of phase B of the circuit breaker. For example, the directional and omnidirectional antennas can be microstrip antennas.

[0028] This array antenna can be used to receive electromagnetic wave signals generated by the circuit breaker during the circuit breaker's tripping action, i.e., the opening process.

[0029] Step 102: Denoise the electromagnetic wave signal received by the omnidirectional antenna to obtain an effective signal.

[0030] Background signals from the environment where the circuit breaker is located can be collected in advance as noise. When the circuit breaker performs its breaking action, the signal is received through an array antenna to obtain the electromagnetic wave signal from the omnidirectional antenna. The noise is removed through signal separation to obtain the effective signal.

[0031] Step 103: Based on the effective signal, extract the first signal, the second signal and the third signal from the electromagnetic wave signals received by the three directional antennas respectively.

[0032] The frequency band of the electromagnetic wave signal generated by the circuit breaker can be determined by the effective signal, and the signal within that frequency band can be extracted from the electromagnetic wave signal of the directional antenna. The three directional antennas correspond to the first signal, the second signal, and the third signal, respectively.

[0033] To further improve the signal-to-noise ratio, the difference in the receiving capability of the directional antenna can be obtained; by combining the effective signal with the difference in receiving capability, the first signal, the second signal, and the third signal can be extracted from the electromagnetic wave signal received by the directional antenna.

[0034] Step 104: Extract the peak values ​​of the first signal, the second signal, and the third signal, and arrange the peak values ​​in time sequence to obtain a peak matrix.

[0035] The difference in the ability of directional antennas to receive signals from signal sources at different angles leads to differences in the amplitude of signals from different signal sources. By extracting the peak amplitude of the signal from each directional antenna, extracting these peak values ​​in chronological order, and arranging them in chronological order, a peak matrix can be obtained.

[0036] In this embodiment, the difference in the directional antenna's ability to receive signals at different angles can be determined in advance, thereby obtaining the difference in the directional antenna's ability to receive signals; the peak values ​​of the first signal, the second signal, and the third signal are separated by the difference in the ability to receive signals, and a peak matrix is ​​obtained.

[0037] For example, in this embodiment, the maximum difference in the receiving capability of the directional antenna for signal sources at different angles is about 40%. Separating the signals with this 40% difference yields a peak matrix including the amplitudes of the signals from different antennas, as shown below:

[0038] The signal received by a directional antenna facing directly has a larger amplitude, while other antenna types have weaker reception capabilities and smaller amplitudes. The peak values ​​of the first signal are extracted sequentially according to their timing. If the first signal is from a directional antenna facing phase A, then the amplitude of the signal from that phase is greater than the amplitude of the signals from other phases. Sorting the extracted peak values ​​according to their timing yields a peak matrix. In this peak matrix, each row represents the first signal, the second signal, and the third signal, and each column represents the first timing sequence, the second timing sequence, and the third timing sequence.

[0039] Step 105: Determine the timing of the three-phase signals based on the timing of the maximum peak in the peak matrix, and extract the three-phase signals A, B, and C from the first, second, and third signals based on the timing of the three-phase signals.

[0040] The first signal, second signal, and third signal are the signals received by the directional antennas facing the circuit breaker in phases A, B, and C, respectively. Based on the directional antennas corresponding to the first, second, and third signals, and the timing of the maximum peak value in the peak matrix, the phase order corresponding to the timing of the maximum peak value is determined. Specifically, for the first signal from the directional antenna facing phase A, the amplitude of the phase A signal is the largest; for the second signal from the directional antenna facing phase B, the amplitude of the phase B signal is the largest; and for the third signal from the directional antenna facing phase C, the amplitude of the phase C signal is the largest.

[0041] Therefore, if the timing sequence in which the maximum peak value of the first signal is located is the first timing sequence, then the signal in the first timing sequence is the circuit breaker A phase signal; if the timing sequence in which the maximum peak value of the first signal is located is the second timing sequence, then the signal in the second timing sequence is the circuit breaker A phase signal; if the timing sequence in which the maximum peak value of the first signal is located is the third timing sequence, then the signal in the third timing sequence is the circuit breaker A phase signal.

[0042] Similarly, the timing of phase B can be determined based on the timing of the maximum peak value of the second signal, and the timing of phase C can be determined based on the timing of the maximum peak value of the third signal.

[0043] To highlight the differences in signal amplitude, the peak matrix can be normalized according to the maximum peak value of each directional antenna. After normalization, the maximum peak value is converted to 1, and other peak values ​​are converted to values ​​between 0 and 1. In this way, only the timing of the "1" needs to be determined. The timing of the "1" corresponds to the signal of the phase of that row of signals.

[0044] After determining the timing sequence of the three-phase signals, signals can be extracted from the first, second, and third signals according to the timing sequence to obtain phase A, phase B, and phase C signals. For example, after determining the timing sequence of phase A, the phase A signal can be obtained by extracting the signal with that timing sequence. Similarly, the phase B signal can be obtained by extracting the signal with that timing sequence from the first, second, or third signals, and the phase C signal can be obtained by extracting the signal with that timing sequence from the first, second, or third signals.

[0045] After obtaining the three-phase signals A, B, and C, fault detection can be performed on the three phases A, B, and C of the circuit breaker based on the three-phase signals, thereby locating the fault in the circuit breaker and accurately determining the phase where the fault is located.

[0046] In this embodiment, leveraging the different signal reception capabilities of directional and omnidirectional antennas, a three-phase signal localization is achieved using an antenna array composed of directional and omnidirectional antennas. During the on-site testing of circuit breakers, the directional nature of the antennas allows for stronger reception at certain angles compared to other directions. First, an array of three directional antennas and one omnidirectional antenna is constructed. The omnidirectional antenna receives the most comprehensive electromagnetic wave signal, which is then processed by a signal separation algorithm to obtain the effective signal. Next, the relative amplitudes of the signals measured by the directional antennas within the same timeframe are used to determine the phase order of each signal source. Finally, the signals with determined phase orders are separated for the diagnosis of each phase of the circuit breaker.

[0047] First, an omnidirectional antenna is used to receive the most comprehensive electromagnetic wave signals. Then, the relative amplitudes between the signals measured by the directional antennas within the same time period are used to determine the phase order of each signal source. This array, consisting of three directional antennas and one omnidirectional antenna, is used for signal reception.

[0048] Figure 2 The structure of the antenna array is shown. (Example) Figure 2 As shown, the directional antennas in the antenna array face phases A, B, and C respectively, while the omnidirectional antenna is positioned horizontally in front of phase B of the circuit breaker. The antenna numbers are set to 1 to 4 respectively.

[0049] When the circuit breaker performs its breaking action, it generates electromagnetic wave signals, which are received by the array antennas. The signals from the four antennas are as follows: Figure 3 As shown, the amplitude difference of the three-phase signals measured by the omnidirectional antenna is not significant, and the amplitude difference comes from the difference of the signals from each phase source. The amplitude difference of the three-phase signals measured by the directional antenna is significant because the directional antenna has the strongest signal reception capability in the direction it is facing, but has a poorer reception capability for the two phase signals being measured.

[0050] The peak values ​​of the signals measured by the three directional antenna channels are extracted respectively, and a peak feature matrix P is constructed as shown below: (1) Normalizing each row in formula (1) based on its maximum value yields the following result: (2) For this peak characteristic matrix P*, each row represents the relative peak value of the signal measured by each antenna, and the channel corresponding to the maximum value in each column is the circuit breaker phase, such as... This indicates that the relative peak value of the first cluster of signals measured by directional antenna No. 1 is the largest, and antenna No. 1 is directly facing phase A of the circuit breaker, i.e. The signal indicated is the electromagnetic wave signal emitted by the A phase of the circuit breaker when it trips; the other two phases are located in the same way.

[0051] For example, directional antennas 1 through 3 are respectively pointed directly at phases A, B, and C of the circuit breaker. Assume the signals observed in the three sets of data are:

[0052] After normalization, we can obtain:

[0053] The maximum values ​​of the columns of the relative peak matrix correspond to the three-phase signals A, B, and C, respectively. Therefore, it can be seen that the first to third clusters of signal peaks correspond to the three-phase signals A, B, and C of the circuit breaker.

[0054] By using a three-phase signal localization method for circuit breakers based on a compact array antenna, rapid, accurate, and non-contact detection of the electromagnetic wave signals radiated by the circuit breaker can be achieved, which can greatly improve the efficiency of fault detection and localization.

[0055] Furthermore, this embodiment also provides a three-phase signal positioning device for a circuit breaker, which can be used to execute the above-described three-phase signal positioning method for a circuit breaker. For example... Figure 4 As shown, the circuit breaker three-phase signal positioning device 400 specifically includes: an array antenna 401, which is used to receive electromagnetic wave signals generated when the circuit breaker operates; a first signal extraction module 402, which is used to denoise the electromagnetic wave signals received by the omnidirectional antenna to obtain effective signals; a second signal extraction module 403, which is used to extract a first signal, a second signal, and a third signal from the electromagnetic wave signals received by the three directional antennas respectively based on the effective signals; a peak extraction module 404, which is used to extract the peak values ​​of the first signal, the second signal, and the third signal, and arrange the peak values ​​in time sequence to obtain a peak matrix; and a signal positioning module 405, which is used to determine the time sequence of the three-phase signals according to the time sequence of the largest peak value in the peak matrix, and extract the three-phase signals A, B, and C from the first signal, the second signal, and the third signal according to the time sequence of the three-phase signals.

[0056] In this embodiment, the array antenna includes three directional antennas and one omnidirectional antenna. The three directional antennas are respectively facing the A, B, and C phases of the circuit breaker, and the omnidirectional antenna is positioned horizontally in front of the B phase of the circuit breaker.

[0057] In one embodiment, the signal positioning module 405 is specifically used to determine the phase corresponding to the time sequence of the maximum peak value based on the directional antennas corresponding to the first signal, the second signal and the third signal, and the time sequence of the maximum peak value in the peak matrix.

[0058] In one embodiment, the device further includes a normalization module for normalizing the peak matrix according to the maximum peak value of each directional antenna.

[0059] In one embodiment, the peak matrix has rows representing a first signal, a second signal, and a third signal, and columns representing a first timing sequence, a second timing sequence, and a third timing sequence, respectively. The signal positioning module 405 is specifically configured to: if the timing sequence in which the maximum peak value of the first signal is located is the first timing sequence, then the signal in the first timing sequence is the circuit breaker A-phase signal; if the timing sequence in which the maximum peak value of the first signal is located is the second timing sequence, then the signal in the second timing sequence is the circuit breaker A-phase signal; if the timing sequence in which the maximum peak value of the first signal is located is the third timing sequence, then the signal in the third timing sequence is the circuit breaker A-phase signal.

[0060] In one embodiment, the peak extraction module 404 is specifically used to obtain the difference in the receiving capability of the directional antenna; and to separate the peak values ​​of the first signal, the second signal and the third signal through the difference in receiving capability to obtain a peak matrix.

[0061] In one embodiment, the device further includes a fault location module for detecting faults in the A, B, and C phases of the circuit breaker based on the A, B, and C phase signals.

[0062] The specific details of each module or unit in the above-mentioned three-phase signal positioning device for circuit breakers have been described in detail in the corresponding three-phase signal positioning method for circuit breakers, so they will not be repeated here.

[0063] This application also provides an electronic device. Figure 5 A schematic diagram of the structure of an electronic device suitable for implementing embodiments of the present disclosure is shown. Figure 5 The electronic device 600 shown is merely an example and should not be construed as limiting the functionality and scope of use of the embodiments disclosed herein.

[0064] like Figure 5As shown, the electronic device 600 includes a central processing unit (CPU) 601, which can perform various appropriate actions and processes based on a program stored in a read-only memory (ROM) 602 or a program loaded from a storage section 608 into a random access memory (RAM) 603. The RAM 603 also stores various programs and data required for system operation. The CPU 601, ROM 602, and RAM 603 are interconnected via a bus 604. An input / output (I / O) interface 605 is also connected to the bus 604.

[0065] The following components are connected to I / O interface 605: an input section 606 including a keyboard, mouse, etc.; an output section 607 including a cathode ray tube (CRT), liquid crystal display (LCD), etc., and speakers, etc.; a storage section 608 including a hard disk, etc.; and a communication section 609 including a network interface card such as a LAN card, modem, etc. The communication section 609 performs communication processing via a network such as the Internet. A drive 610 is also connected to I / O interface 605 as needed. A removable medium 611, such as a disk, optical disk, magneto-optical disk, semiconductor memory, etc., is installed on drive 610 as needed so that computer programs read from it can be installed into storage section 608 as needed.

[0066] In particular, according to embodiments of this disclosure, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of this disclosure include a computer program product comprising a computer program carried on a computer-readable storage medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via communication section 609, and / or installed from removable medium 611. When the computer program is executed by central processing unit (CPU) 601, it performs the functions defined in the embodiments of this application.

[0067] For example, when the computer program is executed by the central processing unit (CPU) 601, it can perform the following: acquire the electromagnetic wave signal received by the omnidirectional antenna and the electromagnetic wave signals received by the three directional antennas respectively; denoise the electromagnetic wave signal received by the omnidirectional antenna to obtain an effective signal; extract a first signal, a second signal, and a third signal from the electromagnetic wave signals received by the three directional antennas based on the effective signal; extract the peak values ​​of the first signal, the second signal, and the third signal, and arrange the peak values ​​in time sequence to obtain a peak matrix; determine the time sequence of the three-phase signals according to the time sequence of the largest peak value in the peak matrix, and extract the three-phase signals A, B, and C from the first signal, the second signal, and the third signal according to the time sequence of the three-phase signals.

[0068] It should be noted that the computer-readable medium disclosed herein may be a computer-readable signal medium or a computer-readable storage medium, or any combination thereof. A computer-readable storage medium may be, for example,—but not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of a computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this disclosure, a computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device. In this disclosure, a computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. Computer-readable signal media can also be any computer-readable medium other than computer-readable storage media, which can send, propagate, or transmit a program for use by or in connection with an instruction execution system, apparatus, or device. The program code contained on the computer-readable medium can be transmitted using any suitable medium, including but not limited to: wireless, wire, optical fiber, RF, etc., or any suitable combination thereof.

[0069] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this disclosure. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram or flowchart, and combinations of blocks in a block diagram or flowchart, may be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0070] The units described in the embodiments of this disclosure can be implemented in software or hardware, and the described units can also be located in a processor. The names of these units do not necessarily limit the unit itself.

[0071] In another aspect, this application also provides a computer-readable medium, which may be included in the electronic device described in the above embodiments; or it may exist independently and not assembled into the electronic device. The computer-readable medium carries one or more programs, which include instructions that, when executed by the electronic device, cause the electronic device to perform the methods described in the above embodiments.

[0072] It should be noted that although several modules or units for the device used to perform actions have been mentioned in the detailed description above, this division is not mandatory. In fact, according to the embodiments of this application, the features and functions of two or more modules or units described above can be embodied in one module or unit. Conversely, the features and functions of one module or unit described above can be further divided and embodied by multiple modules or units.

[0073] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A three-phase signal location method for a circuit breaker, characterized in that, An array antenna is arranged around the circuit breaker. The array antenna includes three directional antennas and one omnidirectional antenna. The three directional antennas are respectively facing the A, B, and C phases of the circuit breaker. The omnidirectional antenna is positioned horizontally in front of the B phase of the circuit breaker. The method includes: Acquire the electromagnetic wave signal received by the omnidirectional antenna, and the electromagnetic wave signals received by the three directional antennas respectively; The electromagnetic wave signal received by the omnidirectional antenna is denoised to obtain an effective signal; Based on the effective signal, the first signal, the second signal, and the third signal are extracted from the electromagnetic wave signals received by the three directional antennas respectively; The peak values ​​of the first signal, the second signal, and the third signal are extracted, and the peak values ​​are arranged in time sequence to obtain a peak matrix; Based on the timing of the maximum peak value in the peak matrix, the timing of the three-phase signals is determined, and the three-phase signals A, B, and C are extracted from the first, second, and third signals according to the timing of the three-phase signals.

2. The circuit breaker three-phase signal location method according to claim 1, characterized in that, Determining the timing sequence of the three-phase signals based on the timing sequence of the maximum peak value in the peak matrix includes: Based on the directional antennas corresponding to the first, second, and third signals, and the timing sequence of the maximum peak value in the peak matrix, determine the phase sequence corresponding to the timing sequence of the maximum peak value.

3. The circuit breaker three-phase signal location method according to claim 1, characterized in that, After arranging the peaks in time sequence to obtain the peak matrix, the process further includes: The peak matrix is ​​normalized according to the maximum peak value of each directional antenna.

4. The circuit breaker three-phase signal location method according to claim 1, characterized in that, The peak matrix has rows representing the first signal, the second signal, and the third signal, and columns representing the first timing sequence, the second timing sequence, and the third timing sequence, respectively. Determining the timing sequence of the three-phase signals based on the timing sequence of the maximum peak value in the peak matrix includes: If the timing sequence in which the maximum peak value of the first signal occurs is the first timing sequence, then the signal in the first timing sequence is the circuit breaker A-phase signal; If the timing sequence in which the maximum peak value of the first signal occurs is the second timing sequence, then the signal in the second timing sequence is the circuit breaker phase A signal; If the timing sequence in which the maximum peak value of the first signal occurs is the third timing sequence, then the signal in the third timing sequence is the circuit breaker A-phase signal.

5. The circuit breaker three-phase signal location method according to claim 1, characterized in that, The step of extracting the peak values ​​of the first, second, and third signals and arranging the peak values ​​in time sequence to obtain a peak matrix includes: To obtain the differences in the receiving capabilities of directional antennas; The peak values ​​of the first, second, and third signals are separated by the difference in their receptivity to obtain a peak matrix.

6. The circuit breaker three-phase signal location method according to claim 1, characterized in that, After extracting the three-phase signals A, B, and C from the first, second, and third signals according to their timing sequence, the process also includes: The circuit breaker's three phases (A, B, and C) are used to detect faults based on the A, B, and C phase signals.

7. The three-phase positioning method for a circuit breaker according to claim 1, characterized in that, The directional antenna and the omnidirectional antenna are microstrip antennas.

8. A three-phase signal positioning device for a circuit breaker, characterized in that, include: An array antenna, comprising three directional antennas and one omnidirectional antenna, is used to receive electromagnetic wave signals generated when a circuit breaker operates. The first signal extraction module is used to denoise the electromagnetic wave signal received by the omnidirectional antenna to obtain an effective signal; The second signal extraction module is used to extract the first signal, the second signal, and the third signal from the electromagnetic wave signals received by the three directional antennas respectively based on the effective signal; The peak extraction module is used to extract the peak values ​​of the first signal, the second signal, and the third signal, and arrange the peak values ​​in time sequence to obtain a peak matrix; The signal positioning module is used to determine the timing sequence of the three-phase signals based on the timing sequence of the maximum peak value in the peak matrix, and to extract the three-phase signals A, B, and C from the first signal, the second signal, and the third signal based on the timing sequence of the three-phase signals.

9. The circuit breaker three-phase signal positioning device according to claim 8, characterized in that, Three directional antennas are positioned facing the A, B, and C phases of the circuit breaker, respectively, while an omnidirectional antenna is positioned horizontally in front of the B phase of the circuit breaker.

10. An electronic device, characterized in that, The device includes a processor and a memory, the memory storing one or more computer programs, the one or more computer programs including instructions that, when executed by the electronic device, cause the electronic device to perform the circuit breaker three-phase signal positioning method according to any one of claims 1-7.

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