Method and device for positioning electromagnetic noise, storage medium and processor

Abstract

The embodiment of the invention provides a method and device for positioning electromagnetic noise, a storage medium and a processor, and belongs to the technical field of electrics. The method for positioning the electromagnetic noise comprises the steps that noise signals generated by a noise source are synchronously received through an audio receiving device array, wherein the audio receiving device array at least comprises a first audio receiving device A1, a second audio receiving device A2 and a third audio receiving device A3 which are arranged in a triangular shape; determining a correction coefficient k of the noise signal amplitude and the sound transmission distance in the space where the high-voltage equipment is located according to a correction algorithm; and determining distances L1, L2 and L3 between the noise source and A1, A2 and A3 according to the correction coefficient k and the noise signal amplitude, and calculating the three-dimensional coordinates of the noise source in the three-dimensional rectangular coordinate system according to the obtained coordinates of L1, L2 and L3 and the coordinates of A1, A2 and A3. The method is used for positioning the position of a component generating electromagnetic noise in the high-voltage equipment which is inconvenient to approach and observe so as to judge whether the high-voltage equipment is abnormal or not and determine a maintenance scheme.

Description

Technical Field

[0001] The present invention relates to the field of electrical technology, and in particular to a method, device, storage medium and processor for locating electromagnetic noise. Background Art

[0002] During the operation of high-voltage equipment, air discharge or high-frequency electromagnetic vibration will be generated at the cable connection, capacitor itself, reactor itself and cable. It is necessary to determine whether there is any abnormality in the high-voltage equipment and determine the maintenance plan as much as possible. This requires accurate determination of the specific location of high-frequency noise during the operation of high-voltage equipment. However, when high-voltage equipment is working, personnel are not allowed to enter the equipment to prevent safety accidents.

[0003] Currently, the specific location of the noise can be determined by taking photos of the equipment and its surroundings with a handheld or fixed infrared thermal imager, checking the heating parts, and locating the specific fault point. However, the infrared thermal imager can only distinguish the specific fault point when the electromagnetic vibration of the equipment generates enough heat. When the external environment temperature is high and the temperature rise of the heating part of the equipment is small, the fault location cannot be determined. When the equipment is working normally, a large amount of current will flow through the capacitors, reactors, and cables, generating heat inside them. After taking photos with an infrared thermal imager, these devices will generate heat, and it is difficult to distinguish between normal and abnormal temperatures. The infrared thermal imager uses infrared rays to infer the specific temperature. When the equipment is outdoors, due to the strong infrared rays emitted by the sun, lighting equipment, etc., the infrared thermal imager cannot accurately measure the temperature of the equipment, resulting in misjudgment. Summary of the invention

[0004] An object of an embodiment of the present invention is to provide a method for locating electromagnetic noise, wherein the method is used to locate the position of a component generating electromagnetic noise in a high-voltage device that is inconvenient to observe closely.

[0005] In order to achieve the above object, an embodiment of the present invention provides a method for locating electromagnetic noise, which is used to locate the position of a noise source generating electromagnetic noise in a high-voltage device, comprising:

[0006] Synchronously receiving the noise signal generated by the noise source through an audio receiving device array, wherein the audio receiving device array comprises at least a first audio receiving device A1, a second audio receiving device A2 and a third audio receiving device A3 arranged in a triangle;

[0007] Determine the correction coefficient k of the noise signal amplitude and the sound transmission distance in the space where the high-voltage equipment is located according to the correction algorithm; and

[0008] According to the correction coefficient k and the amplitude of the noise signal, the distances L1, L2, L3 between the noise source and A1, A2, A3 are determined respectively. In the three-dimensional rectangular coordinate system, the three-dimensional coordinates of the noise source are calculated according to the obtained coordinates of L1, L2, L3 and A1, A2, A3.

[0009] Specifically, the correction coefficient k of the noise signal amplitude and the sound transmission distance in the space where the high-voltage equipment is located is determined according to the correction algorithm, including:

[0010] A1, A2 and / or A3 synchronously receive sound signals S1, S2, S3 of predetermined frequency and intensity emitted by a fixed sound source;

[0011] k is determined according to the distances of A1, A2 and / or A3 from the fixed sound source and the intensity amplitudes of S1, S2 and / or S3, respectively.

[0012] Preferably, A1, A2 and A3 are arranged in an equilateral triangle.

[0013] More specifically, A1 is set at the origin of the three-dimensional rectangular coordinate system, A2 is set at the coordinate position (S, 0, 0) of the three-dimensional rectangular coordinate system, and A3 is set at the coordinate position (S, 0, 0) of the three-dimensional rectangular coordinate system. location; and

[0014] The three-dimensional coordinates of the noise source are expressed as:

[0015]

[0016] Among them, L1 = k × Mag1, L2 = k × Mag2, L3 = k × Mag3;

[0017] L1, L2, and L3 are the distances between A1, A2, and A3 and the noise source, respectively;

[0018] Mag1, Mag2, and Mag3 are the signal amplitudes of N1, N2, and N3 respectively.

[0019] Optionally, the method for locating electromagnetic noise further includes: converting the three-dimensional coordinates of the noise source into polar coordinates.

[0020] Optionally, the noise source is one or more high-voltage components; preferably, when there are multiple noise sources, or when multiple noise signals overlap with each other, different noise signals are distinguished according to spectrum distribution.

[0021] Optionally, the spacing scale between any two of A1, A2 and A3 is determined according to the propagation distance of sound in the space where the high-voltage equipment is located per unit time; preferably, the spacing scale is 10% of the sound propagation distance per unit time.

[0022] On the other hand, the present application also provides a device for locating electromagnetic noise, which is used to perform the method for locating electromagnetic noise of the present application. The device for locating electromagnetic noise includes an audio receiving device array and a noise signal analysis device.

[0023] Wherein, the noise signal generated by the noise source is synchronously received by an array of audio receiving devices;

[0024] The noise signal analysis device is configured to:

[0025] Receive noise signals N1, N2, N3 obtained by A1, A2, and A3 respectively, and locate the position of the noise source generating electromagnetic noise in the high-voltage equipment through the following steps:

[0026] Determine the correction coefficient k of the noise signal amplitude and the sound transmission distance in the space where the high-voltage equipment is located according to the correction algorithm; and

[0027] According to the correction coefficient k and the amplitude of the noise signal, the distances L1, L2, L3 between the noise source and A1, A2, A3 are determined respectively. In the three-dimensional rectangular coordinate system, the three-dimensional coordinates of the noise source are calculated according to the obtained coordinates of L1, L2, L3 and A1, A2, A3.

[0028] On the other hand, the present application also provides a maintenance method for high-voltage equipment, comprising:

[0029] According to the method for locating electromagnetic noise of the present application, the vibration source and the time point when the vibration occurs in the high-voltage equipment are located, and the actual working condition of the high-voltage equipment within a predetermined time is determined, wherein the vibration source is one or more components that emit vibration noise;

[0030] Compare the expected operating conditions of the high-voltage equipment within the scheduled time with the actual operating conditions to determine whether there are any abnormalities in the high-voltage equipment.

[0031] Optionally, the maintenance method for high-voltage equipment further includes: if it is determined that an abnormality exists, determining the severity of the abnormality and a maintenance plan based on the location of the vibration source and changes in vibration intensity.

[0032] On the other hand, the present invention provides a machine-readable storage medium having instructions stored thereon, the instructions being used to enable a machine to execute the method for locating electromagnetic noise or the method for repairing high-voltage equipment of the present application.

[0033] On the other hand, the present invention provides a processor for running a program, wherein the program, when being run, is used to execute: the method for locating electromagnetic noise of the present application, or the method for repairing high-voltage equipment.

[0034] On the other hand, the present invention provides a computer program product, including a computer program, which, when executed by a processor, implements: the method for locating electromagnetic noise of the present application, or the method for repairing high-voltage equipment.

[0035] Through the above technical scheme, three audio receiving devices A1, A2, and A3 arranged in a triangle are first received to synchronously receive the noise signal in the space where the high-voltage equipment is located, and the correction coefficient of the noise signal amplitude and the sound transmission distance in the space where the high-voltage equipment is located is determined through a correction algorithm. Then, the correction coefficient and the three received noise signal amplitudes are combined to determine the distances of the noise source from A1, A2, and A3 respectively, and then the coordinates of the noise source in the three-dimensional coordinate system are determined based on the obtained distances. The position of the noise source can be accurately calculated without the need for personnel to observe closely, and then it can be determined whether there is an abnormality in the high-voltage equipment and determine the maintenance plan.

[0036] Other features and advantages of the embodiments of the present invention will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific implementations, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. In the accompanying drawings:

[0038] Figure 1 is a flow chart of an embodiment of a method for locating electromagnetic noise of the present invention;

[0039] Figure 2 is a schematic diagram of the positional relationship between an audio receiving device and a noise source in another embodiment of the method for locating electromagnetic noise of the present invention;

[0040] Figure 3 Yes Figure 2 A model diagram in which the positional relationship is placed in a three-dimensional rectangular coordinate system; and

[0041] Figure 4 Yes Figure 2 The noise source in the figure is placed in a polar coordinate system, and its coordinate diagram is shown. DETAILED DESCRIPTION

[0042] The specific implementation of the embodiment of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the present invention, and is not used to limit the embodiment of the present invention.

[0043] If there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0044] Figure 1 The flowchart of the method for locating electromagnetic noise according to an embodiment of the present application is schematically shown. Figure 1 As shown, in one embodiment of the present application, a method for locating electromagnetic noise is provided, which is used to locate the position of a noise source generating electromagnetic noise in a high-voltage device, comprising the following steps:

[0045] Step 101, synchronously receiving a noise signal generated by a noise source through an audio receiving device array, wherein the audio receiving device array includes at least a first audio receiving device A1, a second audio receiving device A2 and a third audio receiving device A3 arranged in a triangle;

[0046] Step 102, determining a correction coefficient k between the noise signal amplitude and the sound transmission distance in the space where the high-voltage equipment is located according to a correction algorithm; and

[0047] Step 103, according to the correction coefficient k and the noise signal amplitude, determine the distances L1, L2, L3 between the noise source and A1, A2, A3 respectively, and calculate the three-dimensional coordinates of the noise source in the three-dimensional rectangular coordinate system according to the obtained coordinates of L1, L2, L3 and A1, A2, A3.

[0048] It should be noted that the high-voltage equipment in this application can be a high-voltage reactive power compensation system, which is used for users of non-linear loads in the power grid, such as industrial fields of power electronic equipment such as rectification, variable frequency speed regulation, medium frequency heating, metallurgical electrolysis, chemical electrolysis, etc.; transportation fields such as electrified railways, subways, trolleybuses, etc.; broadcasting, postal services, communications, IT industries that are sensitive to harmonic interference; and exhibition centers, commercial buildings and other fields that have strict requirements on power quality. It widely involves places and industries such as electricity, automobiles, metallurgy, machinery manufacturing, chemicals, papermaking, coal, shipbuilding, communications, airports, large venues, high-rise buildings, etc. The high-voltage fixed reactive power compensation system includes circuit breakers, voltage transformers, current transformers, capacitors, reactors, connecting cables, wall bushings, fixed bases and other equipment, with a rated voltage of 6-35KV and a rated frequency of 50Hz. Capacitor switching mode: vacuum circuit breaker or vacuum contactor, protection functions: overvoltage, undervoltage, time-limited quick-break, overcurrent, neutral point voltage (or current) unbalance protection; a single capacitor has external fuse protection in addition to internal fuse protection. When high-voltage current passes through a fixed reactive power compensation system, air discharge or high-frequency electromagnetic vibration will be generated at the cable connection, between the capacitor itself, the reactor itself and the cable. When the equipment is working, personnel are not allowed to enter the interior of the equipment. The method of locating electromagnetic noise of the present invention can be used to determine the location of components that generate high-voltage vibrations and formulate maintenance plans in advance.

[0049] Specifically, in step 101, the first, second, and third audio receiving devices may be as shown in FIG. Figure 2 The microphones M1, M2, and M3 shown in the figure receive the noise signal emitted by the vibration source P synchronously. It should be noted that the audio receiving device array in step 101 may include other microphones or other receiving devices besides the microphones M1, M2, and M3. When analyzing the noise signals emitted by different vibration sources, different microphone combinations can be selected from the array multiple times to receive the noise signals, and the three-dimensional coordinates of the noise sources finally obtained by different combinations can be mutually verified. In order to simplify the calculation, microphones M1, M2, and M3 are preferably arranged in an equilateral triangle from the array.

[0050] More specifically, the spacing scale between A1, A2 and A3 can be determined according to the propagation speed of sound in the space where the high-voltage equipment is located, and the spacing scale is preferably 10% of the propagation distance per unit time. For example, the spacing between M1, M2 and M3 is 10% of the propagation distance of sound in the space where the high-voltage equipment is located within 1 second or a distance close thereto.

[0051] In step 102, a correction coefficient k of the noise signal amplitude and the sound transmission distance in the space where the high-voltage equipment is located is determined according to a correction algorithm, which can be: first, sound signals S1, S2, S3 of predetermined frequency and intensity emitted by a fixed sound source are synchronously received through A1, A2 and / or A3, and then k is determined according to the distances of A1, A2 and / or A3 from the fixed sound source and the intensity amplitudes of S1, S2 and / or S3.

[0052] If in step 101, M1, M2, and M3 are arranged in an equilateral triangle, and the side length of the equilateral triangle is S, then in step 103, preferably A1 is set at the origin of the three-dimensional rectangular coordinate system, A2 is set at the coordinate position (S, 0, 0) of the three-dimensional rectangular coordinate system, and A3 is set at the coordinate position (S, 0, 0) of the three-dimensional rectangular coordinate system. Position. Then in the three-dimensional rectangular coordinate system, Figure 3 The spatial model shown in FIG. 1 , where the distances L1, L2, and L3 between M1, M2, and M3 and the vibration source P are respectively expressed as:

[0053]

[0054] In formulas ①②③, x, y, y are the coordinates of the vibration source P on the X, Y, and Z axes in the three-dimensional rectangular coordinate system. Solving x, y, and z in formulas ①②③, we can get:

[0055]

[0056]

[0057] Among them, L1, L2, and L3 can be expressed by the noise signal amplitude obtained in step 101 and the correction coefficient k obtained in step 102, that is, L1=k×Mag1, L2=k×Mag2, L3=k×Mag3, L1, L2, and L3 are the distances between A1, A2, and A3 and the noise source respectively, and Mag1, Mag2, and Mag3 are the signal amplitudes of N1, N2, and N3 respectively.

[0058] So far, we can get the vibration source P in Figure 3 The three-dimensional coordinates in the rectangular coordinate system shown.

[0059] In some embodiments, the polar coordinate system is preferably used to calculate the three-dimensional coordinates (r, θ, ),like Figure 4 As shown. The technician can convert the coordinates of the rectangular coordinate system obtained in the above solution process to obtain polar coordinates, and can also solve the distance between the vibration source P and the origin, and express the distance as an expression of the noise signal amplitude at the origin and the correction coefficient k, thereby calculating the r value, and then determining the direction vector of the vibration source P according to the following steps.

[0060] Since different noises have different center frequencies and different transmission speeds in different environments, temperatures, and altitudes, they cannot be settled and estimated synchronously. Therefore, settlement is required by the controller that receives the noise.

[0061] When measuring high-frequency vibration audio signals, since the external environmental conditions are basically the same during the test period, the transmission speed of the noise remains unchanged during the measurement process, assumed to be Spd, with the unit of m / s; the center frequency of the noise is Freq, with the unit of Hz.

[0062] The noise signal generated by the vibration source P can be expressed according to the following formula: Sig = Spd*sin(2*pi*Freq*t).

[0063] That is, when the noise generated by the vibration source P propagates to the microphone M1, the noise signal obtained by the microphone M1 can be expressed as:

[0064] The noise signals obtained by the other two microphones M2 and M3 can be expressed as:

[0065] Obviously, the center frequency Freq of the noise signal can be obtained by FFT, and different noise sources can be distinguished by frequency resolution. The amplitude of the noise signal can also be obtained, and then the ratio of the distances L1, L2, and L3 between the noise source and the three microphones can be obtained by the amplitude relationship of the three microphones:

[0066] L1 / L2=Mag1 / Mag2=N2

[0067] L1 / L3=Mag1 / Mag3=N3

[0068] L2 / L3=Mag2 / Mag3

[0069] The relationship between the normal vector of the plane where the three microphones are located and the vibration source P is established through the above ratio, so that the direction vector of the vibration source P relative to the plane where the three microphones are located can be solved.

[0070] In some embodiments, the noise source is one or more high voltage components. When there are multiple noise sources or multiple noise signals overlap each other, different noise signals are distinguished according to the spectrum distribution.

[0071] Compared with the prior art, the technical advantages of the method for locating electromagnetic noise of the present invention are:

[0072] 1. Arrange a microphone array in the space where the high-voltage equipment is located and select three microphones from it to synchronously collect high-frequency vibration noise signals. Determine the distances between the three microphones and the noise source based on the noise intensity and the correction coefficient of the sound transmission distance in the space where the high-voltage equipment is located, and then locate the position of the vibration source by distance;

[0073] 2. Three microphones arranged in an equilateral triangle are preferred to simplify calculations and quickly locate the vibration source;

[0074] 3. Select different combinations of three microphones from the microphone array multiple times and verify the correctness of the positions of the located vibration sources with each other;

[0075] 4. Setting the distance between different microphones to 10% of the distance that sound travels in one second can effectively distinguish the intensity of noise signals;

[0076] 5. Different noise signals can be distinguished according to the spectrum distribution, and multiple noise signals that overlap each other can be effectively distinguished;

[0077] 6. Based on the positioning of the vibration source, it is possible to accurately formulate a power outage maintenance plan for high-voltage equipment, saving power outage maintenance time.

[0078] An embodiment of the present invention provides a device for locating electromagnetic noise, which is used to perform the method for locating electromagnetic noise of the present application. The device for locating electromagnetic noise includes an audio receiving device array and a noise signal analysis device, wherein the noise signal generated by the noise source is synchronously received by the audio receiving device array;

[0079] The noise signal analysis device is configured to:

[0080] Receive noise signals N1, N2, N3 obtained by A1, A2, and A3 respectively, and locate the position of the noise source generating electromagnetic noise in the high-voltage equipment through the following steps:

[0081] Determine the correction coefficient k of the noise signal amplitude and the sound transmission distance in the space where the high-voltage equipment is located according to the correction algorithm; and

[0082] According to the correction coefficient k and the amplitude of the noise signal, the distances L1, L2, L3 between the noise source and A1, A2, A3 are determined respectively. In the three-dimensional rectangular coordinate system, the three-dimensional coordinates of the noise source are calculated according to the obtained coordinates of L1, L2, L3 and A1, A2, A3.

[0083] An embodiment of the present invention provides a device for locating electromagnetic noise, which includes a processor and a memory. A noise signal analysis device is stored in the memory as a program unit, and the processor executes the program unit stored in the memory to implement corresponding functions.

[0084] The processor includes a kernel, which calls the corresponding program unit from the memory. One or more kernels can be set, and the location of the noise source can be determined by adjusting the kernel parameters.

[0085] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0086] An embodiment of the present invention provides a maintenance method for high-voltage equipment, comprising:

[0087] According to the method for locating electromagnetic noise of the present application, the vibration source and the time point when the vibration occurs in the high-voltage equipment are located, and the actual working condition of the high-voltage equipment within a predetermined time is determined, wherein the vibration source is one or more components that emit vibration noise;

[0088] Compare the expected operating conditions of the high-voltage equipment within the scheduled time with the actual operating conditions to determine whether there are any abnormalities in the high-voltage equipment.

[0089] In some embodiments, the maintenance method for high-voltage equipment further includes: if it is determined that an abnormality exists, determining the severity of the abnormality and a maintenance plan based on the location of the vibration source and the change in vibration intensity.

[0090] An embodiment of the present invention provides a storage medium on which a program is stored. When the program is executed by a processor, the method for locating electromagnetic noise or the method for repairing high-voltage equipment of the present application is implemented.

[0091] An embodiment of the present invention provides a processor, which is used to run a program, wherein the program, when running, executes the method for locating electromagnetic noise or the method for repairing high-voltage equipment of the present application.

[0092] The embodiment of the present invention provides a device, which includes a processor, a memory, and a program stored in the memory and can be run on the processor. When the processor executes the program, the method steps of locating electromagnetic noise or the method steps of repairing high-voltage equipment of the present application are implemented. The device in this article can be a server, a PC, a PAD, a mobile phone, etc.

[0093] The present application also provides a computer program product, which, when executed on a data processing device, is suitable for executing a program that initializes the method steps for locating electromagnetic noise or the method steps for repairing high-voltage equipment of the present application.

[0094] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0095] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0096] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0097] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0098] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0099] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0100] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules 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 technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0101] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0102] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims

1. A method for locating electromagnetic noise, for locating the position of a noise source generating electromagnetic noise in a high voltage device, characterized in that: include: Synchronously receiving the noise signal generated by the noise source through an audio receiving device array, wherein the audio receiving device array comprises at least a first audio receiving device A1, a second audio receiving device A2 and a third audio receiving device A3 arranged in a triangle; Determine, according to a correction algorithm, a correction coefficient k of the noise signal amplitude and the sound transmission distance in the space where the high-voltage equipment is located; and According to the correction coefficient k and the amplitude of the noise signal, the distances L1, L2, L3 between the noise source and A1, A2, A3 are determined respectively. In a three-dimensional rectangular coordinate system, the three-dimensional coordinates of the noise source are calculated according to the obtained coordinates of L1, L2, L3 and A1, A2, A3.

2. The method for locating electromagnetic noise according to claim 1, characterized in that: Determining the correction coefficient k of the noise signal amplitude and the sound transmission distance in the space where the high-voltage equipment is located according to the correction algorithm includes: A1, A2 and / or A3 synchronously receive sound signals S1, S2, S3 of predetermined frequency and intensity emitted by a fixed sound source; The k is determined according to the distances of the A1, the A2 and / or the A3 from the fixed sound source and the intensity amplitudes of the S1, the S2 and / or the S3.

3. The method for locating electromagnetic noise according to claim 1 or 2, characterized in that: The A1, A2 and A3 are arranged in an equilateral triangle.

4. The method for locating electromagnetic noise according to claim 3, characterized in that: A1 is set at the origin of the three-dimensional rectangular coordinate system, A2 is set at the coordinate (S, 0, 0) of the three-dimensional rectangular coordinate system, and A3 is set at the coordinate (S, 0, 0) of the three-dimensional rectangular coordinate system. location; and The three-dimensional coordinates of the noise source are expressed as: Among them, L1 = k × Mag1, L2 = k × Mag2, L3 = k × Mag3; L1, L2, L3 are the distances between A1, A2, A3 and the noise source respectively; Mag1, Mag2, and Mag3 are the signal amplitudes of N1, N2, and N3 respectively.

5. The method for locating electromagnetic noise according to claim 1, characterized in that: Also includes: The three-dimensional coordinates of the noise source are converted into polar coordinates.

6. The method for locating electromagnetic noise according to claim 1, characterized in that: The noise source is one or more high-voltage components; When there are multiple noise sources, or when multiple noise signals overlap each other, different noise signals are distinguished according to the frequency spectrum distribution.

7. The method for locating electromagnetic noise according to claim 6, characterized in that: The distance between each of A1, A2 and A3 is determined according to the propagation distance of the sound in the space where the high-voltage equipment is located within a unit time.

8. The method for locating electromagnetic noise according to claim 7, characterized in that: The spacing scale is 10% of the sound propagation distance per unit time.

9. The method for locating electromagnetic noise according to any one of claims 1 to 8, characterized in that: The high voltage equipment is a high voltage powerless compensation system.

10. A device for locating electromagnetic noise, used to perform the method for locating electromagnetic noise according to any one of claims 1 to 9, characterized in that: The device for locating electromagnetic noise includes an audio receiving device array and a noise signal analysis device, wherein the noise signal generated by the noise source is synchronously received by the audio receiving device array; The noise signal analysis device is configured as follows: Noise signals N1, N2, and N3 obtained by A1, A2, and A3 are received respectively, and the position of the noise source generating electromagnetic noise in the high-voltage equipment is located by the following steps: Determine, according to the correction algorithm, a correction coefficient k of the noise signal amplitude and the sound transmission distance in the space where the high-voltage equipment is located; and According to the correction coefficient k and the amplitude of the noise signal, the distances L1, L2, L3 between the noise source and A1, A2, A3 are determined respectively. In a three-dimensional rectangular coordinate system, the three-dimensional coordinates of the noise source are calculated according to the obtained coordinates of L1, L2, L3 and A1, A2, A3.

11. A method for repairing high-voltage equipment, comprising: Locate the vibration source and the time point when the vibration occurs in the high-voltage equipment according to the method for locating electromagnetic noise according to any one of claims 1 to 9, and determine the actual working condition of the high-voltage equipment within a predetermined time, wherein the vibration source is one or more components that emit vibration noise; The expected operating condition of the high-voltage equipment within the predetermined time is compared with the actual operating condition to determine whether there is an abnormality in the high-voltage equipment.

12. The maintenance method of high voltage equipment according to claim 11, characterized in that: Also includes: If it is determined that an abnormality exists, the severity of the abnormality and the maintenance plan are determined based on the location of the vibration source and the change in vibration intensity.

13. A machine-readable storage medium having instructions stored thereon, the instructions being used to cause a machine to execute: the method for locating electromagnetic noise as described in any one of claims 1 to 9, or the method for repairing high-voltage equipment as described in claim 11 or 12.

14. A processor, characterized in that: Used to run a program, wherein the program, when run, is used to execute: the method for locating electromagnetic noise according to any one of claims 1 to 9, or the method for repairing high-voltage equipment according to claim 11 or 12.

15. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the computer program implements: the method for locating electromagnetic noise according to any one of claims 1 to 9, or the method for repairing high-voltage equipment according to claim 11 or 12.

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