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 following steps: firstly, according to different attenuations of audio signals synchronously received by three audio receiving devices in an audio receiving device array, determining distance proportions from a noise source to A1, A2 and A3 respectively, and then according to the maximum distance of audio signal transmission in a space in which a high-voltage device is located and P1, P2,..., P2,..., P1, P2,..., P1, P2,..., P1, P2,..., P1, P2,..., P1, P2,..., P1, P2,..., P1, P2,..., P2. And the distances D1 and D2 from the noise source to the perpendicular foot of the straight line L passing through the A1 and the A2 to the A1 and the A2, the distance D3 from the A3 to the straight line L and the distance H from the noise source to the straight line L are solved, finally the position, with the distance H from the perpendicular foot, of the noise source on the surface of the high-voltage equipment is determined, and the specific position of the noise source is limited in an auxiliary mode according to the size relation of D3 and H. According to the method, the range of the noise source can be limited under the condition that personnel do not need to approach to observe, whether the high-voltage equipment is abnormal or not is judged, and the maintenance scheme is determined.

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 one aspect, the present application provides a method for locating electromagnetic noise, for locating a noise source generating electromagnetic noise in a high voltage device, comprising:

[0006] Synchronously receiving an audio 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;

[0007] According to the different attenuation of the audio signals received by A1, A2 and A3, the distance proportions P1, P2 and P3 of the noise source to A1, A2 and A3 are determined respectively;

[0008] According to the maximum distance of audio signal transmission in the space where the high-voltage equipment is located and P1 and P2, solve the distances D1 and D2 between the foot of the perpendicular from the noise source to the straight line L passing through A1 and A2 and A1 and A2 respectively, the distance D3 from A3 to the straight line L, and the distance H between the noise source and the straight line L;

[0009] Determine that the noise source is located on the surface of the high-voltage equipment at a distance H from the vertical foot, and based on the size relationship between D3 and H, assist in limiting the specific location of the noise source.

[0010] Optionally, determine P1, P2, and P3 according to the following formula:

[0011]

[0012] Where S1, S2, and S3 are the distances between A1, A2, and A3 and the noise source, respectively; S4 is the distance between A1 and A2; and M is the maximum distance at which the audio signal attenuates during transmission in the space where the high-voltage equipment is located and can be monitored by A1, A2, and A3.

[0013] Further, when M is equal to S4, S1, S2, and S3 are the intensities of the audio noise signals received by A1, A2, and A3, respectively.

[0014] Optionally, based on the size relationship between D3 and H, the specific location of the noise source is assisted to be limited, including:

[0015] When D3 is greater than H, it is determined that the noise source is located on the same side of the straight line L as A3;

[0016] When D3 is smaller than H, it is determined that the noise source is located on the side of the straight line L different from the position of A3.

[0017] Optionally, the noise source is one or more high voltage components.

[0018] Furthermore, when there are multiple noise sources, or when multiple audio signals overlap each other, different audio signals are distinguished according to the frequency spectrum distribution.

[0019] Furthermore, 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 per unit time and M.

[0020] Furthermore, the spacing scale is a value between 10% and M of the propagation distance.

[0021] On the other hand, the present application 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 an audio signal analysis device.

[0022] 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, and A1, A2 and A3 are configured to: synchronously receive audio signals generated by a noise source;

[0023] The audio signal analysis device is configured to:

[0024] The audio signals N1, N2, and N3 obtained by A1, A2, and A3 are received respectively, and the position of the noise source generating the electromagnetic noise in the high-voltage equipment is located by the following steps:

[0025] According to the different attenuation of the audio signals received by A1, A2 and A3, the distance proportions P1, P2 and P3 of the noise source to A1, A2 and A3 are determined respectively;

[0026] According to the maximum distance of audio signal transmission in the space where the high-voltage equipment is located and P1 and P2, solve the distances D1 and D2 between the foot of the perpendicular from the noise source to the straight line L passing through A1 and A2 and A1 and A2 respectively, the distance D3 from A3 to the straight line L, and the distance H between the noise source and the straight line L;

[0027] Determine that the noise source is located on the surface of the high-voltage equipment at a distance H from the vertical foot, and based on the size relationship between D3 and H, assist in limiting the specific location of the noise source.

[0028] On the other hand, the present application provides a method for repairing 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] Preferably, the maintenance method 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.

[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 or the method for repairing high-voltage equipment of the present application.

[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 or the method for repairing high-voltage equipment of the present application.

[0035] Through the above technical scheme, firstly, according to the different attenuation of the audio signals synchronously received by the three audio receiving devices in the audio receiving device array, the distance ratios of the noise source to A1, A2 and A3 are determined respectively, and then, according to the maximum distance of the audio signal transmission in the space where the high-voltage equipment is located and P1, P2, the distances D1 and D2 from the foot of the perpendicular from the noise source to the straight line L passing through A1 and A2 and A1 and A2 respectively, the distance D3 from A3 to the straight line L, and the distance H from the noise source to the straight line L are solved. Finally, it is determined that the noise source is located at a position H from the foot of the perpendicular on the surface of the high-voltage equipment, and according to the size relationship between D3 and H, the specific position of the noise source is assisted in limiting, so that the range of the noise source can be limited without the need for personnel to approach for observation, and then it is 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 yes Figure 1 Projection diagram of the positional relationship model of the audio receiving device and the noise source in the embodiment. DETAILED DESCRIPTION

[0040] 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.

[0041] 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.

[0042] 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 the noise source generating electromagnetic noise on the surface of high-voltage equipment, comprising the following steps:

[0043] Step 101, synchronously receiving an audio 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;

[0044] Step 102, according to the different attenuation of the audio signals received by A1, A2 and A3, determine the distance proportions P1, P2 and P3 of the noise source to A1, A2 and A3 respectively, and determine the distance D3 between the noise source and A3;

[0045] Step 103, according to the maximum distance of audio signal transmission in the space where the high-voltage equipment is located and P1, P2, solve the distances D1 and D2 between the foot of the perpendicular from the noise source to the straight line L passing through A1 and A2 and A1 and A2 respectively, and solve the distance H between the noise source and the straight line L; and

[0046] Step 104, determine that the noise source is located at a position on the surface of the high-voltage equipment at a distance H from the vertical foot, and based on the size relationship between D3 and H, assist in defining the specific position of the noise source.

[0047] It should be noted that the noise source may be one or more high-voltage components. According to the actual situation of troubleshooting and maintenance, the position where the audio noise is emitted on the surface of the high-voltage equipment is usually located. In some embodiments, when there are multiple noise sources, or when multiple audio signals overlap with each other, different audio signals are distinguished according to the spectrum distribution. In some embodiments, the spacing scale between A1, A2 and A3 is determined based on the propagation distance of sound in the space where the high-voltage equipment is located per unit time and the maximum distance M of the audio signal transmission in the space where the high-voltage equipment is located. Preferably, the spacing scale is a value between 10% and M of the sound propagation distance per unit time to distinguish the audio signals received by different audio receiving devices.

[0048] Specifically, in step 101, the audio receiving device array may be a plurality of microphones arranged vertically and horizontally, and three microphones are selected from the microphone array to synchronously receive the audio signal generated by the noise source. When the distances between different microphones and the noise source are different, the received noise intensities are also different. Based on step 103, the positional relationship between the noise source and the first audio receiving device A1 and the second audio receiving device A2 is solved. It should be noted that in this embodiment, the three selected microphones are required to be not on the same straight line as much as possible, so that the transmission of the audio signals between the noise source and different microphones is independent of each other.

[0049] Further, in step 102, the distance proportions P1, P2, and P3 of the noise source to A1, A2, and A3, respectively, are determined according to the following formula, wherein the focus is on the distance proportions of the noise source to A1 and A2, respectively:

[0050] Where S1, S2, S3 are the distances between A1, A2, A3 and the noise source respectively, and S4 is the distance between A1 and A2.

[0051] It should be noted that because it is generally believed that sound attenuation is inversely correlated with transmission distance, in the above formula, S1, S2, and S3 are the distances between A1, A2, and A3 and the noise source respectively. They can be replaced by the signal amplitudes received at A1, A2, and A3, or by expressions based on the above signal amplitudes.

[0052] Specifically, in step 104, according to the magnitude relationship between D3 and H, the specific location of the noise source is assisted to be limited, including:

[0053] When D3 is greater than H, it is determined that the noise source is located on the same side of the straight line L as A3;

[0054] When D3 is smaller than H, it is determined that the noise source is located on the side of the straight line L different from the position of A3.

[0055] In some embodiments, the noise source is one or more high voltage components.

[0056] Specifically, when there are multiple noise sources, or when multiple audio signals are overlapped with each other, different audio signals are distinguished according to frequency spectrum distribution.

[0057] More specifically, the spacing scale between A1, A2 and A3 is determined according to the propagation distance of the sound in the space where the high-voltage equipment is located per unit time and M, wherein the maximum distance M is the maximum distance at which the audio signal attenuates during the transmission process in the space where the high-voltage equipment is located and can be monitored by A1, A2 and A3. Preferably, the spacing scale is a value between 10% of the propagation distance and M.

[0058] To facilitate technical personnel to understand, this application is combined with Figure 2 The positional relationship model of the audio receiving device and the noise source shown in the figure illustrates the calculation steps of the method for locating electromagnetic noise of the present application. Figure 2 As shown, A1, A2, and A3 are three audio receiving devices selected from the audio receiving device array, and Pr1 and Pr2 are possible positions of vibration sources determined according to the noise audio signals received by A1 and A2.

[0059] Step 1, the coordinates of the audio receiving devices A1, A2, and A3 are recorded as (x1, y1), (x2, y2), and (x3, y3) respectively;

[0060] Step 2, the distance L between A1 and A2 is

[0061] Step 3, calculate H according to the following steps, that is, the distance from the noise source to the straight line formed by A1 and A2:

[0062] Calculate H by following the steps below:

[0063] according to Figure 2 have:

[0064] Where S1 and S2 are the distances between Pr1 and A1 and A2 respectively;

[0065] ①-② equals: D1 2 -D2 2 =S1 2 -S2 2 , that is, (D1+D2)(D1-D2)=S1 2 -S2 2 , and because L is the distance between A and B, that is, D1+D2=L③,

[0066] Therefore,

[0067] Combining ③ and ④, we can get

[0068] Combining ① and ②, we can get the value of H, that is, the noise source is the point whose distance from A1 and A2 is H.

[0069] It should be noted that Figure 2 To calculate the projection diagram of the model, the noise source is limited to the point on the surface of the equipment that is at a straight line distance H formed by distances A1 and A2, which only limits the range of the noise source.

[0070] Step 4, by formula

[0071] Calculate the distance D3 from the audio receiving device A3 to the perpendicular line AB;

[0072] Step 5, further define the specific location of the noise source according to the size relationship between D3 and H;

[0073] Specifically, when D3 is greater than H, it is determined that the noise source is located on the same side of the straight line formed by A1 and A2 as the position of A3; when D3 is less than H, it is determined that the noise source is located on a side of the straight line formed by A1 and A2 that is different from the position of A3.

[0074] Through step 5, the location of the noise source is further limited, and the maintenance personnel can determine the scope of the fault based on the conclusion of step 5.

[0075] It should also be noted that S1 and S2 in the above step 3 are determined by the following steps:

[0076] The distance between the vibration source Pr1 and A1 is S1, the distance between the vibration source Pr1 and A2 is S2, and the distance between the vibration source Pr1 and A3 is S3;

[0077] Assume that the attenuation factor of the audio signal in the environment where the high-voltage equipment is located is The audio signal strength at A1 is γ1, and the audio signal strength at A2 is γ2, then: γ1=S1*φ, γ2=S2*φ;

[0078] Assume that the audio signal is attenuated during transmission in the space where the high-voltage equipment is located to a maximum distance of M meters where it can be monitored by A1, A2, and A3;

[0079] Determine the distance ratios P1, P2, and P3 of the noise source to A1, A2, and A3 respectively according to the following formula:

[0080] That is, Where L is the distance between A1 and A2.

[0081] Specifically, since the propagation distance of the audio signal is inversely proportional to the attenuation degree and directly proportional to the signal strength, when L is equivalent to M, the lengths of S1, S2, and S3 in the above formula can be replaced by the strengths of the audio signals received by A1, A2, and A3, respectively. That is, according to the audio signal strength at A1 being γ1, the audio signal strength at A2 being γ2, and the coordinates of A1 and A2, the distance H between the noise source and the straight line L formed by A1 and A2 is obtained.

[0082] Compared with the prior art, the technical advantages of the method for locating electromagnetic noise of the present invention are:

[0083] 1. Arrange three or more microphones in the space where the high-voltage equipment is located to synchronously collect high-frequency vibration audio signals, and define the location range of the audio signal source based on noise intensity, sound transmission and spatial characteristics, thereby simplifying the process of locating the fault noise;

[0084] 2. Setting the distance between different microphones to more than 10% of the distance that sound propagates in one second can effectively distinguish the strength of audio signals. When the distance between the two microphones is equivalent to the maximum distance that the audio signal can be detected by the microphone during the transmission process in the space where the high-voltage equipment is located, the calculation can be simplified and the location range of the audio signal source can be quickly limited according to the noise intensity;

[0085] 3. Different audio signals can be distinguished according to the spectrum distribution, and multiple audio signals that overlap each other can be effectively distinguished;

[0086] 4. 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.

[0087] 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 an audio signal analysis device, 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, and A1, A2 and A3 are configured to: synchronously receive an audio signal generated by a noise source;

[0088] The audio signal analysis device is configured to: receive the audio 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:

[0089] According to the different attenuation of the audio signals received by A1, A2 and A3, the distance proportions P1, P2 and P3 of the noise source to A1, A2 and A3 are determined respectively;

[0090] According to the maximum distance of audio signal transmission in the space where the high-voltage equipment is located and P1 and P2, solve the distances D1 and D2 between the foot of the perpendicular from the noise source to the straight line L passing through A1 and A2 and A1 and A2 respectively, the distance D3 from A3 to the straight line L, and the distance H between the noise source and the straight line L;

[0091] Determine that the noise source is located on the surface of the high-voltage equipment at a distance H from the vertical foot, and based on the size relationship between D3 and H, assist in limiting the specific location of the noise source.

[0092] An embodiment of the present invention provides a device for locating electromagnetic noise, which includes a processor and a memory. An audio 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.

[0093] 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.

[0094] 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.

[0095] An embodiment of the present invention provides a maintenance method for high-voltage equipment. The method first locates the vibration source and the time point when the vibration occurs in the high-voltage equipment through the method for locating electromagnetic noise of the present application, and determines 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; then, the expected working condition and the actual working condition of the high-voltage equipment within the predetermined time are compared to determine whether there is any abnormality in the high-voltage equipment.

[0096] In some embodiments, if it is determined that the high-voltage equipment has an abnormality, the maintenance method of the high-voltage equipment further includes: determining the severity of the abnormality and a maintenance plan based on the location of the vibration source and changes in vibration intensity.

[0097] 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.

[0098] 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.

[0099] 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.

[0100] 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.

[0101] 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.

[0102] 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.

[0103] 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.

[0104] 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 A step that specifies a function in one or more boxes.

[0105] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0106] 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.

[0107] 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.

[0108] 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.

[0109] 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, used to locate the position of the noise source generating electromagnetic noise on the surface of high-voltage equipment, characterized in that: include: Synchronously receiving the audio 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; According to the different attenuations of the audio signals received by A1, A2 and A3, determining the distance proportions P1, P2 and P3 of the noise source to A1, A2 and A3 respectively; According to the maximum distance M of audio signal transmission in the space where the high-voltage equipment is located and P1 and P2, solve the distances D1 and D2 from the foot of the perpendicular from the noise source to the straight line L passing through A1 and A2 and A1 and A2 respectively, the distance D3 from A3 to the straight line L, and the distance H between the noise source and the straight line L; Determine that the noise source is located at a position on the surface of the high-voltage equipment at a distance H from the perpendicular foot, and based on the size relationship between D3 and H, assist in defining the specific position of the noise source.

2. The method for locating electromagnetic noise according to claim 1, characterized in that: Determine P1, P2, and P3 according to the following formula: Wherein, S1, S2, S3 are the distances between A1, A2, A3 and the noise source respectively, S4 is the distance between A1 and A2, and M is the maximum distance at which the audio signal is attenuated during transmission in the space where the high-voltage equipment is located and can be monitored by A1, A2, A3.

3. The method for locating electromagnetic noise according to claim 2, characterized in that: When M is equal to S4, S1, S2, and S3 are the intensities of the audio noise signals received by A1, A2, and A3, respectively.

4. The method for locating electromagnetic noise according to claim 2, characterized in that: The auxiliary limiting of the specific position of the noise source according to the magnitude relationship between D3 and H includes: When D3 is greater than H, it is determined that the noise source is located on the same side of the straight line L as the position of A3; When D3 is smaller than H, it is determined that the noise source is located on a side of the straight line L different from the position of A3.

5. The method for locating electromagnetic noise according to any one of claims 1 to 4, characterized in that: The noise source is one or more high-voltage components.

6. The method for locating electromagnetic noise according to claim 2, characterized in that: When there are multiple noise sources, or when multiple audio signals are overlapped with each other, different audio 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 in unit time and M.

8. The method for locating electromagnetic noise according to claim 7, characterized in that: The spacing scale is a value between 10% of the propagation distance and M.

9. A device for locating electromagnetic noise, used to perform the method for locating electromagnetic noise according to any one of claims 1 to 8, characterized in that: The device for locating electromagnetic noise includes an audio receiving device array and an audio signal analysis device, 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, wherein A1, A2 and A3 are configured to: synchronously receive the audio signal generated by the noise source; The audio signal analysis device is configured to: The audio 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: According to the different attenuations of the audio signals received by A1, A2 and A3, determining the distance proportions P1, P2 and P3 of the noise source to A1, A2 and A3 respectively; According to the maximum distance of audio signal transmission in the space where the high-voltage equipment is located and P1 and P2, the distances D1 and D2 from the foot of the perpendicular from the noise source to the straight line L passing through A1 and A2 and A1 and A2 respectively, the distance D3 from A3 to the straight line L, and the distance H between the noise source and the straight line L are solved; Determine that the noise source is located at a position on the surface of the high-voltage equipment at a distance H from the perpendicular foot, and based on the size relationship between D3 and H, assist in defining the specific position of the noise source.

10. A method for repairing high-voltage equipment, comprising: Locate the surface vibration source of the high-voltage equipment and the time point when the vibration occurs according to the method for locating electromagnetic noise according to any one of claims 1 to 8, 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.

11. The maintenance method of high voltage equipment according to claim 10, 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.

12. 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 8, or the method for repairing high-voltage equipment as described in claim 10 or 11.

13. 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 8, or the method for repairing high-voltage equipment according to claim 10 or 11.

14. 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 8, or the method for repairing high-voltage equipment according to claim 10 or 11.

Images