Transformer ascending flanged base internal discharge positioning method and system based on sound field intensity information

Abstract

The invention discloses a method and system for positioning discharge in a transformer ascending flanged base based on sound field intensity information, and relates to the technical field of partial discharge detection and diagnosis of transformer ascending flanged bases, and the method comprises the steps: determining the position distribution of a first sensor and a typical discharge region setting scheme; obtaining the maximum value of a sound intensity signal received by the first sensor, and screening a sensor arrangement scheme; and establishing a fault feature model according to a screening result, and positioning a discharge position. According to the method for positioning the discharge in the transformer ascending flanged base based on the sound field intensity information, the abnormal discharge area can be accurately positioned through the sound intensity information received by the sensors, absolute time synchronization does not need to be carried out on the sensors, meanwhile, positioning errors caused by a multi-path effect are avoided, the fault misjudgment and misjudgment probability is reduced, and the positioning accuracy is improved. And meanwhile, the calculation amount of actual fault positioning and diagnosis is reduced, and better effects are achieved in the aspects of positioning errors, the calculation amount and universality.

Description

Technical Field

[0001] The invention relates to the technical field of partial discharge detection and diagnosis of transformer riser, and in particular to a method for locating discharge in a transformer riser based on sound field intensity information. Background Art

[0002] As a key device in the power system, the transformer is responsible for the transmission and conversion of electric energy and is crucial to the stable operation of the power system. However, abnormal discharge is prone to occur during the operation of the transformer; inside the transformer riser, the structure is complex and it is subjected to high voltage environment for a long time, and the electric field strength is high. Especially in the area of ​​the outgoing line device, it is easy to generate gas and other pollutants, which reduces the insulation strength and makes abnormal discharge more likely to occur. If it cannot be detected in time, once it develops into a power accident, the consequences will be disastrous.

[0003] When discharge occurs, it will be accompanied by a variety of abnormal physical phenomena such as electromagnetic waves, ultrasound, visible light, sound, light, heat and electricity. At the same time, a variety of discharge detection methods have been developed. The most common detection methods are ultrasonic detection and ultra-high frequency detection. Although traditional detection methods have their advantages, they also have great limitations. Ultra-high frequency detection technology has high sensitivity and strong signal analysis capabilities, but it is sensitive to environmental noise and there are also many detection blind spots; the ultrasonic detection method based on multiple sensors to measure the arrival time difference of signals to determine the location of local discharge is highly adaptable and supports multi-target detection, but it is affected by the multipath effect, resulting in large positioning errors, and has high requirements for time synchronization, and the post-processing calculation is complex, and the disadvantages are more obvious. Summary of the invention

[0004] In view of the above-mentioned problems, the present invention is proposed.

[0005] Therefore, the technical problem solved by the present invention is: the existing method for locating abnormal discharge inside the transformer riser has large positioning error, high calculation complexity, and is easily affected by the multipath effect, as well as the optimization problem of how to avoid the positioning error caused by the multipath effect.

[0006] To solve the above technical problems, the present invention provides the following technical solutions: a method for locating discharge in a transformer riser based on sound field intensity information, comprising determining the position distribution of a first sensor and a typical discharge area setting scheme; obtaining the maximum value of the sound intensity signal received by the first sensor, and screening the sensor layout scheme; establishing a fault characteristic model according to the screening results to locate the discharge position.

[0007] As a preferred solution of the method for locating discharge in a transformer riser based on sound field intensity information described in the present invention, the scheme for determining the position distribution of the first sensor and the typical discharge area setting includes dividing the distribution of the first sensor in the transformer riser area into area 1 and area 2.

[0008] As a preferred solution of the method for locating discharge inside the transformer riser based on sound field intensity information described in the present invention, the scheme for determining the position distribution of the first sensor and the setting of the typical discharge area also includes dividing the typical area inside the transformer riser into area 3, area 4 and area 5.

[0009] As a preferred solution of the method for locating discharge in a transformer riser based on sound field intensity information described in the present invention, the method of obtaining the maximum value of the sound intensity signal received by the first sensor includes obtaining the maximum value of the sound intensity signal received by the first sensor in various sensor arrangement schemes under each typical discharge area.

[0010] As a preferred solution of the method for locating discharge in a transformer riser based on sound field intensity information described in the present invention, the method of screening the first sensor arrangement method includes screening the sensor arrangement scheme by comparing characteristic information of discharge in different areas under the same sensor arrangement scheme.

[0011] As a preferred solution of the method for locating discharge in a transformer riser based on sound field intensity information described in the present invention, wherein: the establishment of a fault characteristic model based on the screening results includes constructing a test code dictionary based on test vectors when discharging in different areas under the sensing arrangement scheme.

[0012] As a preferred solution of the method for locating discharge in a transformer riser based on sound field intensity information described in the present invention, the locating discharge position includes obtaining the test vector required in the fault feature model for each test result, determining the fuzzy set number for each element in the vector according to the range of the fuzzy domain, obtaining the test code, retrieving the fault area in the feature model according to the fault code, and confirming the discharge position.

[0013] Another object of the present invention is to provide a transformer riser discharge positioning system based on sound field intensity information, which can analyze the sound field characteristic vector through the fault characteristic model through the discharge positioning module to determine the discharge position, thereby solving the problem of high time synchronization and complex calculation required for fault positioning.

[0014] As a preferred solution of the transformer riser discharge positioning system based on sound field intensity information described in the present invention, it includes: a position area module, a scheme screening module, and a discharge positioning module; the position area module is used to determine the position distribution of the first sensor and the typical discharge area setting scheme; the scheme screening module is used to obtain the maximum value of the sound intensity signal received by the first sensor and screen the sensor layout scheme; the discharge positioning module is used to establish a fault characteristic model according to the screening result and locate the discharge position.

[0015] A computer device includes a memory and a processor, wherein the memory stores a computer program, and is characterized in that the processor executes the computer program to implement the steps of a method for locating discharge in a transformer riser based on sound field intensity information.

[0016] A computer-readable storage medium stores a computer program, wherein when the computer program is executed by a processor, the steps of a method for locating discharge in a transformer riser based on sound field intensity information are implemented.

[0017] Beneficial effects of the present invention: The transformer riser discharge positioning method based on sound field intensity information provided by the present invention can accurately locate the abnormal discharge area through the sound intensity information received by each sensor, without the need to perform absolute time synchronization on each sensor, and at the same time avoids the positioning error caused by the multipath effect. When locating the fault, the fault test code matrix is ​​used without the need to perform a large number of Euclidean distance calculations or deviation square calculations in n-dimensional space, thereby reducing the probability of misjudgment and misjudgment of the fault, and at the same time reducing the amount of calculation for actual fault positioning and diagnosis. The present invention has high universality and a simple positioning process. After the fault test code matrix is ​​established in the early stage, it is only necessary to retrieve the feature model according to the actual test vector during actual positioning without the need for complex calculations. The present invention achieves better results in terms of positioning error, calculation amount and universality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0019] Figure 1 The overall flow chart of the method for locating discharge in a transformer riser based on sound field intensity information provided in the first and second embodiments of the present invention.

[0020] Figure 2 A schematic diagram of the division of sensor arrangement positions for a method for locating discharge in a transformer riser based on sound field intensity information provided in a third embodiment of the present invention.

[0021] Figure 3 A diagram showing a division scheme of typical discharge areas in a transformer riser according to a method for locating discharges in a transformer riser based on sound field intensity information provided in a third embodiment of the present invention.

[0022] Figure 4 A pulse waveform diagram of simulated abnormal discharge applied during a simulation test of a method for locating discharge in a transformer riser based on sound field intensity information provided in a third embodiment of the present invention.

[0023] Figure 5 The third embodiment of the present invention provides a method for locating discharge in a transformer riser based on sound field intensity information, and a diagram of the change in sound intensity received by each sensor under a certain sensor arrangement scheme when discharge occurs in a typical area near a pressure equalizing ball.

[0024] Figure 6 This is an overall module diagram of a transformer riser discharge positioning system based on sound field intensity information provided in the fourth embodiment of the present invention. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the drawings of the specification. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in the art without creative work should fall within the scope of protection of the present invention.

[0026] Example 1

[0027] Reference Figure 1 , which is an embodiment of the present invention, provides a method for locating discharge in a transformer riser based on sound field intensity information, comprising:

[0028] S1: Determine the location distribution of the first sensor and the typical discharge area setting scheme.

[0029] Furthermore, determining the location distribution of the first sensors and the typical discharge area setting scheme includes dividing the distribution of the first sensors in the transformer riser area into area 1 and area 2.

[0030] It should be noted that the first sensor may be an ultrasonic sensor or an electromagnetic acoustic sensor.

[0031] It should also be noted that an ultrasonic sensor is used as the first sensor to detect discharge by utilizing the propagation characteristics of ultrasonic waves in the air;

[0032] According to the geometric structure of the transformer riser, the ultrasonic sensor is placed on the outer wall of the riser and the position is encoded with polar coordinates to ensure that the typical discharge area inside the transformer riser is covered;

[0033] The ultrasonic sensor receives the sound intensity signal emitted from the discharge position, and the collected signal is converted into an electrical signal and recorded by the sensor;

[0034] Obtain the maximum value of the sound intensity signal received by the ultrasonic sensor in each discharge area, and screen the layout scheme, focusing on the frequency and amplitude characteristics of the ultrasonic signal during screening to distinguish the discharge modes in different areas;

[0035] The corresponding fault feature model is generated according to the screening results, and the analysis results of the ultrasonic signal characteristics are provided to facilitate the subsequent diagnosis and positioning of the discharge position.

[0036] It should also be noted that the electromagnetic acoustic sensor uses the electromagnetic effect to detect the change of sound intensity in the discharge area, which is particularly suitable for monitoring the discharge phenomenon on the metal surface;

[0037] Distribute electromagnetic acoustic sensors in key areas of the transformer riser, such as the bushing tail end at the top, the voltage-equalizing ball area, and the insulating cardboard at the bottom, to ensure that the sensors cover the main discharge locations;

[0038] The electromagnetic acoustic sensor detects the acoustic wave signal generated by the discharge and converts it into an electrical signal, captures the propagation characteristics of the acoustic wave on the transformer surface, and further analyzes the intensity and spectrum characteristics of the acoustic wave;

[0039] In different areas, the maximum sound intensity signal received by the electromagnetic acoustic sensor is collected, and the appropriate sensor layout scheme is selected according to its spectrum characteristics. The characteristic information of discharge in different areas under the same layout is compared, and the frequency distribution and amplitude of the signal are analyzed to eliminate the interference of environmental noise.

[0040] Combined with the data from electromagnetic acoustic sensors, the test vectors of different discharge areas are modeled to form a fault feature model based on frequency response to support accurate discharge positioning.

[0041] It should also be noted that the traversal method is used to obtain alternative solutions for the distribution of sensors in the transformer elevation seat area. Area 1 is located on the outer shell of the transformer close to the elevation seat. This area is concentric with the intersection circular surface of the elevation seat and the shell. If the radius of the transformer elevation seat is r, then the radius of this area is 2r. The arrangement of sensors in this area is encoded using polar coordinates, which is expressed as:

[0042] (1,φ 1 , R 1 )

[0043]

[0044] Among them, Δφ 1 , ΔR 1 Determined by the detection accuracy, there are N 1 =k 1 g 1 Layout points.

[0045] It should also be noted that area 2 is the outer wall of the transformer riser. After reasonable simplification and correction of the model, it is encoded in cylindrical coordinates and expressed as:

[0046] (2,φ 2 , H 2 )

[0047]

[0048] Among them, Δφ 2 , ΔH 2 Determined by the detection accuracy, there are N 2 =k 2 g 2 Layout points.

[0049] It should also be noted that, considering that the main monitoring area of ​​the sensor is the transformer riser area, it is necessary to arrange at least 3 sensors on the outer wall of the riser, so the total possible arrangement schemes are kind.

[0050] Furthermore, determining the position distribution of the first sensor and the typical discharge area setting scheme also includes dividing the typical area inside the transformer riser into area 3, area 4 and area 5.

[0051] It should be noted that the traversal method is used to obtain alternative solutions for the setting of the discharge position in the typical area of ​​the transformer riser. Area 3 is the bushing tail area at the top of the riser. The discharge position setting in this area is encoded using cylindrical coordinates. However, because the discharge point is only set on the bushing surface, each discharge position is simplified by the encoding method as follows:

[0052] (φ 3 , H 3 )

[0053]

[0054] Among them, Δφ 3 , ΔH 3 Determined by the detection accuracy, a total of M are set in area 3 1 =k 3 g 3 A discharge area.

[0055] It should also be noted that area 4 is the pressure-equalizing ball area in the middle of the riser, and the discharge position setting in this area is encoded using cylindrical coordinates. The encoding method of each discharge position is expressed as:

[0056] (φ 4 , H 4 ,R 4 )

[0057]

[0058] R 4 = {r 1 , r 2 ,……,r z} T

[0059] According to historical discharge data, the probability of discharge occurring at both ends and in the middle of the equalizing ball is inconsistent, and different accuracies need to be used to set the discharge point, Δφ 4 , ΔH 4 , Δφ 4 ', ΔH 4 'Determined by the detection accuracy, a total of discharge area, z is the number of insulating paperboards in the outgoing line device.

[0060] It should also be noted that area 5 is the remaining area at the bottom of the riser, and the discharge position setting in this area is encoded using cylindrical coordinates. The encoding method of each discharge position is expressed as:

[0061] (φ 5 , H 5 ,R 5 )

[0062]

[0063] R 5 = {r 1 , r 2 ,……,r z} T

[0064] Among them, Δφ 5 , ΔH 5 Determined by the detection accuracy, a total of M are set in area 5 3 =k 5 g 5 z discharge areas, the total number of typical discharge areas that need to be set is M = M 1 +M 2 +M 3 indivual.

[0065] Example 2

[0066] Reference Figure 1 , which is an embodiment of the present invention, provides a method for locating discharge in a transformer riser based on sound field intensity information, comprising:

[0067] S2: Obtain the maximum value of the sound intensity signal received by the first sensor and screen the sensor layout plan.

[0068] Furthermore, obtaining the maximum value of the sound intensity signal received by the first sensor includes obtaining the maximum value of the sound intensity signal received by the first sensor in various sensor arrangement schemes under each typical discharge area.

[0069] It should be noted that, in the N sensor schemes under M typical discharge areas, the maximum value of the sound intensity signal received by the sensor is I i , i = {1, 2, 3, 4, 5}. In various sensor layout schemes, the sensor coding rule is that area 1 is before area 2; in the same area, they are arranged in order from small to large R (or H). In each scheme, the maximum value of the sound intensity signal of each sensor is simulated and compared, which is expressed as:

[0070]

[0071] Where i∈{1,2,3,4,5} and i≠m. If the maximum value of the sound intensity signal received by the sensor is less than 3 times the normal noise signal of the sensor, it is considered that the sensor has not received a valid signal, and the ratio is set to 0. Let b j =α i (j=1,2,3,4), we get the vector β={b 0 , b 1 , b 2 , b 3 , b 4}, matrix J M×N It is expressed as:

[0072]

[0073] Among them, β m，n It is the characteristic information of the nth sensor arrangement scheme under the discharge condition of the mth area.

[0074] Furthermore, screening the first sensor arrangement includes screening the sensor arrangement scheme by comparing characteristic information of discharges in different regions under the same sensor arrangement scheme.

[0075] It should be noted that according to β i,1 ,β i,2 ,......,β i,N The first element of (i=1,2,……M) divides the discharges of M regions into 5 groups. i,j Find the F norm pairwise, and the solution formula is expressed as:

[0076]

[0077] If the F norm is 0, continue the calculation. If the F norm is not 0, use this scheme as an alternative and operate the last four feature quantities respectively. i,1,β i,2 ,......,β i,N The distances are calculated pairwise. If there are two test vectors where the distances of the four feature quantities are all 0, then this solution is excluded; otherwise, this solution is taken as an alternative.

[0078] S3: Establish a fault feature model based on the screening results and locate the discharge position.

[0079] Furthermore, establishing a fault feature model based on the screening results includes constructing a test code dictionary based on test vectors when discharging in different areas under the sensing arrangement scheme.

[0080] It should be noted that if there are multiple solutions that meet the conditions, the solution with better detection effect and higher sensitivity for the area 4 where discharge is more likely to occur will be preferentially selected.

[0081] It should also be noted that the test vectors for discharges in different areas under the sensor arrangement scheme are obtained, and each of the five sets of data will construct a matrix J M'×4 It is expressed as:

[0082]

[0083] Among them, b mi are the four characteristic quantities under the optimal sensor arrangement scheme when a fault occurs in the mth area. According to the specific value of each characteristic quantity when a fault occurs in each area, each characteristic quantity is divided into μ ij (i=1,2,2,j=1,2,3,4) fuzzy domains. The division of each fuzzy domain is based on the principle that the adjacent fuzzy boundaries do not overlap. If two adjacent fuzzy domains overlap, the boundaries of the two fuzzy domains are adjusted and shrunk. The separate isolation of each fault is achieved according to the operational relationship between the feature quantity and the fuzzy set combination. For each determined (feature number, fuzzy set), there will be several corresponding fault areas F 1 、F 2 ,…,F M0 Since there are 4 characteristic quantities, the test code in each group consists of 4-bit integers, which together constitute the test code matrix T M'×5 ' is expressed as:

[0084]

[0085] Among them, c ml ∈{1,2,…,μ il}, for easy searching, according to the test code value size, that is, 1000C m1 +100C m2 +10C m3 +C m4 The size of is rearranged to get the final test code dictionary T M'×5 .

[0086] Furthermore, locating the discharge position includes for each test result.

[0087] It should be noted that the test vector required in the fault feature model is obtained, the fuzzy set number is determined for each element in the vector according to the range of the fuzzy domain, the test code is obtained, the fault area is retrieved in the feature model according to the fault code, and the discharge position is confirmed.

[0088] Example 3

[0089] Reference Figure 2-5 , which is an embodiment of the present invention, provides a method for locating discharge in a transformer riser based on sound field intensity information. In order to verify the beneficial effects of the present invention, scientific demonstration is carried out through economic benefit calculation and simulation experiments.

[0090] like Figure 2-Figure 3 As shown, 1 is the transformer housing, 2 is the transformer riser, 3 is the bushing, 4 is the voltage equalizing ball, 5 is the outlet device, and 6 is the insulating paperboard.

[0091] In the process of simulating and establishing the fault dictionary, the coverage frequency is 20kHz-200kHz, and the expression of the applied waveform is expressed as:

[0092] P(t)=10 -5 ·gp(t)·sin(2πf 0 t)

[0093]

[0094] Where gp(t) is a standard Gaussian pulse.

[0095] like Figure 4-Figure 5 As shown, by simulating and testing such high-frequency pulses, the present invention can accurately analyze and identify the characteristics of the sound intensity signal in the discharge process. The simulated waveform is helpful to construct a fault characteristic model, so that the discharge area can be accurately located according to the received sound field intensity information in practical applications. By simulating abnormal discharge pulse waveforms with a wide frequency range, the present invention can simulate a variety of possible fault scenarios and extract key sound field characteristics, providing an accurate basis for actual discharge positioning, covering a wide frequency range, so that the method can adapt to different types of discharge signal characteristics, improving the universality of discharge detection, reducing environmental noise interference by selecting the optimal sensor layout scheme, and improving the reliability of signal detection. The sound intensity signals received by multiple sensors can quickly locate the position of abnormal discharge, significantly improving the efficiency and accuracy of discharge diagnosis. By analyzing the sound intensity signal instead of absolute time synchronization, the present invention reduces complex calculation requirements, reduces positioning errors, and improves the overall efficiency of fault diagnosis.

[0096] Example 4

[0097] Reference Figure 6 , which is an embodiment of the present invention, provides a transformer riser discharge positioning system based on sound field intensity information, including: a location area module, a solution screening module, and a discharge positioning module.

[0098] The location area module is used to determine the location distribution of the first sensor and the typical discharge area setting plan; the plan screening module is used to obtain the maximum value of the sound intensity signal received by the first sensor and screen the sensor layout plan; the discharge positioning module is used to establish a fault characteristic model according to the screening results and locate the discharge position.

[0099] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0100] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in conjunction with such instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in conjunction with such instruction execution systems, devices or apparatuses.

[0101] More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk case (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be a paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering, or processing in another suitable manner as necessary, and then stored in a computer memory.

[0102] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc. It should be noted that the above embodiments are only used to illustrate the technical solution of the present invention and are not limited. Although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

[0103] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A method for locating discharge in a transformer riser based on sound field intensity information, characterized in that: include: Determine the location distribution of the first sensor and the typical discharge area setting plan; Obtain the maximum value of the sound intensity signal received by the first sensor, and screen the sensor layout plan; A fault characteristic model is established based on the screening results to locate the discharge position.

2. The method for locating discharge in a transformer riser based on sound field intensity information according to claim 1, characterized in that: The method for determining the location distribution of the first sensors and the typical discharge area setting scheme includes dividing the distribution of the first sensors in the transformer elevation area into area 1 and area 2.

3. The method for locating discharge in a transformer riser based on sound field intensity information according to claim 2, characterized in that: The method for determining the position distribution of the first sensor and the typical discharge area setting scheme also includes dividing the typical area inside the transformer riser into area 3, area 4 and area 5.

4. The method for locating discharge in a transformer riser based on sound field intensity information as claimed in claim 3, characterized in that: The obtaining of the maximum value of the sound intensity signal received by the first sensor includes obtaining the maximum value of the sound intensity signal received by the first sensor in various sensor arrangement schemes under each typical discharge area.

5. The method for locating discharge in a transformer riser based on sound field intensity information according to claim 4, characterized in that: The screening of the first sensor arrangement includes screening the sensor arrangement scheme by comparing characteristic information of discharges in different regions under the same sensor arrangement scheme.

6. The method for locating discharge in a transformer riser based on sound field intensity information as claimed in claim 5, characterized in that: The establishing of the fault characteristic model according to the screening result includes constructing a test code dictionary according to the test vectors when different areas are discharged under the sensing arrangement scheme.

7. The method for locating discharge in a transformer riser based on sound field intensity information according to claim 6, characterized in that: The method of locating the discharge position includes obtaining the test vector required in the fault feature model for each test result, determining the fuzzy set number for each element in the vector according to the range of the fuzzy domain, obtaining the test code, retrieving the fault area in the feature model according to the fault code, and confirming the discharge position.

8. A system using the method for locating discharge in a transformer riser based on sound field intensity information as claimed in any one of claims 1 to 7, characterized in that: Including location area module, solution screening module, and discharge positioning module; The location area module is used to determine the location distribution of the first sensor and the typical discharge area setting scheme; The scheme screening module is used to obtain the maximum value of the sound intensity signal received by the first sensor and screen the sensor arrangement scheme; The discharge positioning module is used to establish a fault characteristic model according to the screening results and locate the discharge position.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method for locating discharge in a transformer riser based on sound field intensity information according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method for locating discharge in a transformer riser based on sound field intensity information according to any one of claims 1 to 7 are implemented.

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