Transformer winding deformation detection method, device, equipment and storage medium

Abstract

This application discloses a transformer winding deformation detection method, apparatus, device, and storage medium, including: providing a matching number of pairs of signal generators and signal receivers along the transformer winding to obtain a scattered wave transfer matrix when the transformer winding is not in operation; obtaining the scattered wave transfer matrices of the transformer winding in its normal operating state one by one at preset phase intervals within an operating cycle, obtaining the matrix norm correlation coefficients between the scattered wave transfer matrices and the scattered wave transfer matrices when the transformer winding is not in operation, and forming an initial transfer array; obtaining the matrix norm correlation coefficients between each scattered wave transfer matrix in the group of scattered wave transfer matrices in the transformer winding's current operating state and the scattered wave transfer matrix when the transformer winding is not in operation, and forming a current transfer array; and determining the transformer winding state based on the initial transfer array and the current transfer array. This method can intuitively assess the mechanical state of the transformer winding, and is more accurate and simple.

Description

Technical Field

[0001] The present application relates to the technical field of transformer winding fault diagnosis, and in particular to a transformer winding deformation detection method, device, equipment and storage medium. Background Art

[0002] Transformers are crucial components of power systems, responsible for the transmission and distribution of electrical energy. One of the primary transformer faults is mechanical winding failure. Currently, mainstream methods for assessing the mechanical condition of windings include short-circuit impedance, vibration frequency response, and vibration detection. However, these methods all indirectly reflect the mechanical condition of the windings through the use of transformer electrical and mechanical parameters, making it difficult to directly assess the mechanical condition of the transformer windings. Summary of the Invention

[0003] Based on this, it is necessary to propose a transformer winding deformation detection method, device, equipment and storage medium to address the above problems.

[0004] The present invention provides a method for detecting transformer winding deformation, the method comprising:

[0005] A plurality of pairs of signal generators and signal receivers are arranged along the transformer windings, wherein the different signal generators emit scattered wave signals of different frequencies, which are received by the signal receivers after being reflected or refracted by the transformer windings;

[0006] Based on the signal generator and the signal receiver, obtaining a scattered wave transfer matrix of the transformer winding when it is not in operation;

[0007] Based on the signal generator and the signal receiver, within an operation cycle of the normal operation of the transformer winding, the scattered wave transfer matrices of the transformer winding under normal operation are obtained one by one at preset phase intervals to form a scattered wave transfer matrix group under normal operation of the transformer winding;

[0008] Obtaining a matrix norm correlation coefficient between each scattered wave transfer matrix in the scattered wave transfer matrix group under the normal operating state of the transformer winding and the scattered wave transfer matrix under the non-operating state of the transformer winding to form an initial transfer array;

[0009] Obtaining a matrix norm correlation coefficient between each scattered wave transfer matrix in the scattered wave transfer matrix group under the current operating state of the transformer winding and the scattered wave transfer matrix under the non-operating state of the transformer winding to form a current transfer array;

[0010] The transformer winding state is determined according to the initial transfer array and the current transfer array.

[0011] In some embodiments, obtaining the scattered wave transfer matrix of the transformer winding in a non-operating state based on the signal generator and the signal receiver includes:

[0012] Acquiring scattered wave signals of different frequencies emitted by the signal generator;

[0013] Acquiring a scattered wave signal received by the signal receiver;

[0014] Based on the scattered wave signals of different frequencies emitted by the signal generator and the scattered wave signals received by the signal receiver, a scattered wave transfer matrix is established when the transformer winding is not in operation. The scattered wave transfer matrix represents the changes of the scattered wave signals passing through the transformer winding. The scattered wave transfer matrix is: ,in, to is the signal amplitude emitted by each signal generator, to is the signal amplitude received by each signal receiver, S 1N To S NN are the elements of the scattered wave transfer matrix.

[0015] In some embodiments, obtaining a matrix norm correlation coefficient between each scattered wave transfer matrix in the scattered wave transfer matrix group under the normal operating state of the transformer winding and the scattered wave transfer matrix under the non-operating state of the transformer winding to form an initial transfer array includes:

[0016] According to [S pn ]=(S p1 ,S p2 ···, S pi ), obtain each scattered wave transfer matrix in the scattered wave transfer matrix group under the normal operating state of the transformer winding, wherein, [S pn ] is the scattered wave transfer matrix group under normal operation of transformer winding, S pi is the scattered wave transfer matrix when the pi phase changes within the operating voltage variation cycle;

[0017] according to Determining a matrix norm correlation coefficient between a scattered wave transfer matrix when the pi phase changes under a normal operating state of the transformer winding and a scattered wave transfer matrix when the transformer winding is not operating;

[0018] in, , , is the mean square error of the transfer matrix modulus at different scattered wave frequencies fn when the pi phase changes, is the mean square error of the transfer matrix modulus at different scattered wave frequencies fn when pi is not running, is the scattered wave transfer matrix when the transformer winding is not in operation, is the scattered wave transfer matrix model when the pi phase changes within the operating voltage variation cycle, and are the transfer matrix moduli at the scattered wave frequency fn when the pi phase changes and when the pi is not in operation, N is the number of scattered wave frequency points, which is also the number of the signal generator and the signal receiver, and n represents the sequence number of the scattered wave frequency point. and are the average values of the transfer matrix modulus at each frequency point when the pi phase changes and when the position is not in operation;

[0019] When the transformer winding is in normal operation, the matrix module correlation coefficient of each scattered wave transfer matrix of the preset phase interval in the scattered wave transfer matrix group and the scattered wave transfer matrix when the transformer winding is not in operation is obtained to form an initial transfer array: [CSM(0)]=[ ( ), ( ),··· ( )].

[0020] In some embodiments, obtaining a matrix norm correlation coefficient between each scattered wave transfer matrix in the scattered wave transfer matrix group in the current operating state of the transformer winding and the scattered wave transfer matrix in the non-operating state of the transformer winding to form a current transfer array includes:

[0021] Based on the signal generator and the signal receiver, within an operation cycle of the transformer winding currently operating, the scattered wave transfer matrices of the transformer winding in the current operation state are acquired one by one at preset phase intervals to form a scattered wave transfer matrix group in the current operation state of the transformer winding;

[0022] Obtain the matrix module correlation coefficient between each scattered wave transfer matrix in the scattered wave transfer matrix group under the current operating state of the transformer winding and the scattered wave transfer matrix under the non-operating state of the transformer winding to form the current transfer array: [CSM(x)]=[ ( ), ( ),··· ( )].

[0023] In some implementations, determining the transformer winding state according to the initial transfer array and the current transfer array specifically includes:

[0024] comparing the initial transfer array and the current transfer array;

[0025] Determining whether a similarity feature quantity between the initial transfer array and the current transfer array exceeds a threshold;

[0026] If the similarity feature quantity between the initial transfer array and the current transfer array exceeds a threshold, the transformer winding is deformed;

[0027] If the similarity feature quantity between the initial transfer array and the current transfer array does not exceed a threshold, the transformer winding state is normal.

[0028] In some embodiments, determining whether the similarity feature quantity between the initial transfer array and the current transfer array exceeds a threshold includes:

[0029] Consider the initial transfer array and the current transfer array as two vectors;

[0030] Determining a similarity feature quantity between the initial transfer array and the current transfer array according to a normalized Manhattan distance or a Euclidean distance between the two vectors;

[0031] It is determined whether the similarity feature exceeds a threshold.

[0032] In some embodiments, the method further comprises:

[0033] Among the pairs of signal generators and signal receivers that are matched in number and arranged along the transformer winding, the signal generators and the signal receivers are respectively and correspondingly arranged on both sides of the oil tank wall of the transformer.

[0034] The present application also provides a transformer winding deformation detection device, the device comprising:

[0035] A scattered wave signal transmission module is used to set up a number of matching pairs of signal generators and signal receivers along the transformer windings, wherein the different signal generators emit scattered wave signals of different frequencies, which are reflected or refracted by the transformer windings and received by the signal receivers;

[0036] A transfer matrix acquisition module, configured to acquire, based on the signal generator and the signal receiver, a scattered wave transfer matrix of the transformer winding when the transformer winding is not in operation;

[0037] a matrix group acquisition module, configured to acquire, based on the signal generator and the signal receiver, the scattered wave transfer matrices of the transformer winding under normal operation at preset phase intervals within an operation cycle of the transformer winding under normal operation, and form a scattered wave transfer matrix group under normal operation of the transformer winding;

[0038] A first transfer array module is configured to obtain a matrix norm correlation coefficient between each scattered wave transfer matrix in the scattered wave transfer matrix group under the normal operating state of the transformer winding and the scattered wave transfer matrix under the non-operating state of the transformer winding, to form an initial transfer array;

[0039] A second transfer array module is configured to obtain a matrix norm correlation coefficient between each scattered wave transfer matrix in the scattered wave transfer matrix group under the current operating state of the transformer winding and the scattered wave transfer matrix under the non-operating state of the transformer winding, to form a current transfer array;

[0040] A winding state judgment module is used to judge the state of the transformer winding according to the initial transfer array and the current transfer array.

[0041] An embodiment of the present application further provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor performs the following steps:

[0042] A plurality of pairs of signal generators and signal receivers are arranged along the transformer windings, wherein the different signal generators emit scattered wave signals of different frequencies, which are received by the signal receivers after being reflected or refracted by the transformer windings;

[0043] Based on the signal generator and the signal receiver, obtaining a scattered wave transfer matrix of the transformer winding when it is not in operation;

[0044] Based on the signal generator and the signal receiver, within an operation cycle of the normal operation of the transformer winding, the scattered wave transfer matrices of the transformer winding under normal operation are obtained one by one at preset phase intervals to form a scattered wave transfer matrix group under normal operation of the transformer winding;

[0045] Obtaining a matrix norm correlation coefficient between each scattered wave transfer matrix in the scattered wave transfer matrix group under the normal operating state of the transformer winding and the scattered wave transfer matrix under the non-operating state of the transformer winding to form an initial transfer array;

[0046] Obtaining a matrix norm correlation coefficient between each scattered wave transfer matrix in the scattered wave transfer matrix group under the current operating state of the transformer winding and the scattered wave transfer matrix under the non-operating state of the transformer winding to form a current transfer array;

[0047] The transformer winding state is determined according to the initial transfer array and the current transfer array.

[0048] The present application also provides a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, the processor performs the following steps:

[0049] A plurality of pairs of signal generators and signal receivers are arranged along the transformer windings, wherein the different signal generators emit scattered wave signals of different frequencies, which are received by the signal receivers after being reflected or refracted by the transformer windings;

[0050] Based on the signal generator and the signal receiver, obtaining a scattered wave transfer matrix of the transformer winding when it is not in operation;

[0051] Based on the signal generator and the signal receiver, within an operation cycle of the normal operation of the transformer winding, the scattered wave transfer matrices of the transformer winding under normal operation are obtained one by one at preset phase intervals to form a scattered wave transfer matrix group under normal operation of the transformer winding;

[0052] Obtaining a matrix norm correlation coefficient between each scattered wave transfer matrix in the scattered wave transfer matrix group under the normal operating state of the transformer winding and the scattered wave transfer matrix under the non-operating state of the transformer winding to form an initial transfer array;

[0053] Obtaining a matrix norm correlation coefficient between each scattered wave transfer matrix in the scattered wave transfer matrix group under the current operating state of the transformer winding and the scattered wave transfer matrix under the non-operating state of the transformer winding to form a current transfer array;

[0054] The transformer winding state is determined according to the initial transfer array and the current transfer array.

[0055] The embodiments of the present application have the following beneficial effects:

[0056] In the transformer winding deformation detection method provided in the embodiment of the present application, by setting a number of matching pairs of signal generators and signal receivers along the transformer winding and emitting scattered wave signals of different frequencies, it is possible to capture tiny structural changes inside the winding, thereby improving the accuracy of transformer winding deformation detection. By comparing the scattered wave transfer matrices obtained one by one at preset phase intervals during a normal operation cycle of the transformer winding and a current operation cycle, the state changes of the transformer winding can be monitored in real time, which helps to promptly discover potential problems such as winding deformation and prevent the expansion of faults. By calculating the matrix module correlation coefficient, an initial transfer array and a current transfer array are formed. The comparison results of the two arrays serve as an important basis for judging the state of the transformer winding, and the mechanical state of the transformer winding is intuitively evaluated, making the judgment process more objective and clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0058] in:

[0059] Figure 1 1 is a flow chart of a transformer winding deformation detection method according to an embodiment;

[0060] Figure 2 is a structural diagram of a transformer winding deformation detection device in one embodiment;

[0061] Figure 3 is a schematic structural diagram of a computer device in one embodiment;

[0062] Figure 4 FIG. 1 is a schematic diagram of the structure of a computer-readable storage medium in one embodiment. DETAILED DESCRIPTION

[0063] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0064] In an embodiment of the present application, a transformer winding deformation detection method is provided. Figure 1 , Figure 1 1 is a flow chart of a transformer winding deformation detection method in an embodiment; the transformer winding deformation detection method includes steps S1 to S6.

[0065] Step S1, arranging a plurality of pairs of signal generators and signal receivers along the transformer winding, wherein the different signal generators emit scattered wave signals of different frequencies, which are received by the signal receivers after being reflected or refracted by the transformer winding;

[0066] In some embodiments, the method further comprises:

[0067] Among the pairs of signal generators and signal receivers that are matched in number and arranged along the transformer winding, the signal generators and the signal receivers are respectively and correspondingly arranged on both sides of the oil tank wall of the transformer.

[0068] In some embodiments, N signal generators and N signal receivers are set on the wall of the transformer oil tank. It is recommended that the signal generator and the signal receiver are both set at positions facing the transformer windings. The frequencies of the N signal generators are different, and the receiving signal frequency of the signal receiver is required to include the frequencies of all signal generators.

[0069] Step S2, based on the signal generator and the signal receiver, obtaining a scattered wave transfer matrix when the transformer winding is not in operation;

[0070] In some embodiments, obtaining the scattered wave transfer matrix of the transformer winding in a non-operating state based on the signal generator and the signal receiver includes:

[0071] Acquiring scattered wave signals of different frequencies emitted by the signal generator;

[0072] Acquiring a scattered wave signal received by the signal receiver;

[0073] Based on the scattered wave signals of different frequencies emitted by the signal generator and the scattered wave signals received by the signal receiver, a scattered wave transfer matrix is established when the transformer winding is not in operation. The scattered wave transfer matrix represents the changes of the scattered wave signals passing through the transformer winding. The scattered wave transfer matrix is: ,in, to is the signal amplitude emitted by each signal generator, to is the signal amplitude received by each signal receiver, S 1N To S NN are the elements of the scattered wave transfer matrix.

[0074] Specifically, after the scattered wave signal is emitted by the signal generator, it is reflected and refracted by various components in the transformer and then received by the signal receiver. The signal emitted by the signal generator is [P] = (P1, P2, ···, P N ) The signal received by the signal receiver is [Q]=(Q1,Q2,···,Q N ), the changes of scattered wave signals inside the transformer can be represented by a transfer matrix:

[0075] , collect the scattered wave transfer matrix S0 when the transformer winding is not in operation.

[0076] Step S3, based on the signal generator and the signal receiver, within an operation cycle of the normal operation of the transformer winding, the scattered wave transfer matrices of the transformer winding under normal operation are acquired one by one at preset phase intervals to form a scattered wave transfer matrix group under normal operation of the transformer winding;

[0077] Specifically, the scattered wave transfer matrix group [S pn ]=(S p1 ,S p2 ···, S pi ), under normal operating conditions, the electromotive force acting on the winding changes periodically with the change of the transformer operating voltage. Therefore, within one cycle of the operating voltage, the scattered wave transfer matrix is obtained at a certain phase interval to form a scattered wave transfer matrix group under normal operating conditions. Generally, the phase interval is 1° to 3° to form a scattered wave transfer matrix group under normal operating conditions of the transformer winding.

[0078] Step S4, obtaining a matrix norm correlation coefficient between each scattered wave transfer matrix in the scattered wave transfer matrix group under the normal operating state of the transformer winding and the scattered wave transfer matrix under the non-operating state of the transformer winding to form an initial transfer array;

[0079] In some embodiments, obtaining a matrix norm correlation coefficient between each scattered wave transfer matrix in the scattered wave transfer matrix group under the normal operating state of the transformer winding and the scattered wave transfer matrix under the non-operating state of the transformer winding to form an initial transfer array includes:

[0080] According to [S pn ]=(S p1 ,S p2 ···, S pi ), obtain each scattered wave transfer matrix in the scattered wave transfer matrix group under the normal operating state of the transformer winding, wherein, [S pn ] is the scattered wave transfer matrix group under normal operation of transformer winding, S pi is the scattered wave transfer matrix when the pi phase changes within the operating voltage variation cycle;

[0081] according to Determining a matrix norm correlation coefficient between a scattered wave transfer matrix when the pi phase changes under a normal operating state of the transformer winding and a scattered wave transfer matrix when the transformer winding is not operating;

[0082] in, , , is the mean square error of the transfer matrix modulus at different scattered wave frequencies fn when the pi phase changes, is the mean square error of the transfer matrix modulus at different scattered wave frequencies fn when pi is not running, is the scattered wave transfer matrix when the transformer winding is not in operation, is the scattered wave transfer matrix model when the pi phase changes within the operating voltage variation cycle, and are the transfer matrix moduli at the scattered wave frequency fn when the pi phase changes and when the pi is not in operation, N is the number of scattered wave frequency points, which is also the number of the signal generator and the signal receiver, and n represents the sequence number of the scattered wave frequency point. and are the average values of the transfer matrix modulus at each frequency point when the pi phase changes and when the position is not in operation;

[0083] When the transformer winding is in normal operation, the matrix module correlation coefficient of each scattered wave transfer matrix of the preset phase interval in the scattered wave transfer matrix group and the scattered wave transfer matrix when the transformer winding is not in operation is obtained to form an initial transfer array: [CSM(0)]=[ ( ), ( ),··· ( )].

[0084] Step S5, obtaining a matrix norm correlation coefficient between each scattered wave transfer matrix in the scattered wave transfer matrix group under the current operating state of the transformer winding and the scattered wave transfer matrix under the non-operating state of the transformer winding to form a current transfer array;

[0085] In some embodiments, obtaining a matrix norm correlation coefficient between each scattered wave transfer matrix in the scattered wave transfer matrix group in the current operating state of the transformer winding and the scattered wave transfer matrix in the non-operating state of the transformer winding to form a current transfer array includes:

[0086] Based on the signal generator and the signal receiver, within an operation cycle of the transformer winding currently operating, the scattered wave transfer matrices of the transformer winding in the current operation state are acquired one by one at preset phase intervals to form a scattered wave transfer matrix group in the current operation state of the transformer winding;

[0087] Obtain the matrix module correlation coefficient between each scattered wave transfer matrix in the scattered wave transfer matrix group under the current operating state of the transformer winding and the scattered wave transfer matrix under the non-operating state of the transformer winding to form the current transfer array: [CSM(x)]=[ ( ), ( ),··· ( )].

[0088] Step S6: determining the transformer winding state according to the initial transfer array and the current transfer array.

[0089] In some implementations, determining the transformer winding state according to the initial transfer array and the current transfer array specifically includes:

[0090] comparing the initial transfer array and the current transfer array;

[0091] Determining whether a similarity feature quantity between the initial transfer array and the current transfer array exceeds a threshold;

[0092] If the similarity feature quantity between the initial transfer array and the current transfer array exceeds a threshold, the transformer winding is deformed;

[0093] If the similarity feature quantity between the initial transfer array and the current transfer array does not exceed a threshold, the transformer winding state is normal.

[0094] In some embodiments, determining whether the similarity feature quantity between the initial transfer array and the current transfer array exceeds a threshold includes:

[0095] Consider the initial transfer array and the current transfer array as two vectors;

[0096] Determining a similarity feature quantity between the initial transfer array and the current transfer array according to a normalized Manhattan distance or a Euclidean distance between the two vectors;

[0097] It is determined whether the similarity feature exceeds a threshold.

[0098] Specifically, the displacement index of the transfer matrix is used to detect the displacement of the transformer winding. Based on the scattered wave transfer matrix S0 of the transformer winding in a non-operating state and the scattered wave transfer matrix group [Spi]=(Sp1, Sp2···, SpI) in a normal operating state, the position index reference data is calculated.

[0099] First, calculate the correlation coefficient of each transfer matrix module ( ):

[0100]

[0101]

[0102] is the correlation coefficient between the matrix modulus under pi phase change and the matrix modulus at the initial position. and are the transfer matrix moduli under pi phase change and initial position at the scattered wave frequency fn. N is the number of scattered wave frequency points, which is also the number of signal generators and signal receivers. and are the average values of the transfer matrix modulus at each frequency point under pi phase change and initial position, respectively.

[0103] Correlation coefficient of the scattered wave transfer matrix of each phase in normal operation state and non-operation state ( ) can form a reference array.

[0104] During the actual operation of the transformer, step S5 is repeated to monitor in real time the correlation coefficient of the scattered wave transfer matrix mode of each phase and the non-operating state within one operating voltage cycle in the current operating state. ( ) and form an array.

[0105] Compare the similarity of the two arrays. If the similarity feature exceeds a certain threshold, the transformer winding has deformed. The two arrays can be treated as two vectors, and similarity features such as the Manhattan distance and Euclidean distance between the two vectors are calculated. If the similarity exceeds a certain threshold, the difference between the two vectors is too large, indicating that the transformer scattered wave transfer matrix has changed significantly compared to normal operation and the transformer winding has deformed. If the similarity feature between the initial transfer array and the current transfer array does not exceed the threshold, the transformer winding is in normal condition. The preferred value of the threshold is 5%.

[0106] In some embodiments, the normalized Euclidean distance is calculated as:

[0107] ;

[0108] The normalized Manhattan distance is calculated as:

[0109] 。

[0110] The technical solution of this embodiment introduces the concept of scattered wave signals. Through the cooperation of signal generators and signal receivers, intuitive detection of the transformer winding status is achieved. Several pairs of signal generators and signal receivers are arranged along the transformer winding, emitting scattered wave signals of different frequencies. This arrangement can more comprehensively cover the transformer winding and improve detection accuracy. By obtaining the scattered wave transfer matrix of the transformer winding in the non-operating state and comparing the scattered wave transfer matrix in the normal operating state with the scattered wave transfer matrix in the current operating state, deformation of the transformer winding can be more accurately determined. The scattered wave transfer matrix is required to be obtained one by one at preset phase intervals within a normal operating cycle of the transformer winding. This method realizes real-time monitoring of the transformer winding, helps to promptly detect potential problems such as winding deformation and prevent the occurrence of faults. By calculating the matrix modulus correlation coefficient, an initial transfer array and a current transfer array are formed. The comparison result of these two arrays serves as an important basis for determining the transformer winding status, making the determination process more objective and clear. The method is relatively simple and does not require transformer disassembly or complex preprocessing, reducing implementation difficulty and cost. At the same time, since the signal generator and the signal receiver are respectively arranged on both sides of the oil tank wall of the transformer, they are easy to install and maintain, which is conducive to the promotion and application of the technical solution of this embodiment. It not only improves the accuracy and efficiency of transformer winding deformation detection, but also helps to ensure the safe and stable operation of the power system.

[0111] In the embodiment of the present application, a transformer winding deformation detection device is provided. Figure 2 , Figure 2 1 is a structural diagram of a transformer winding deformation detection device in one embodiment. The transformer winding deformation detection device includes: a scattered wave signal transmission module 201, a transfer matrix acquisition module 202, a matrix group acquisition module 203, a first transfer array module 204, a second transfer array module 205 and a winding state judgment module 206.

[0112] The scattered wave signal transmission module 201 is configured to set up a plurality of pairs of signal generators and signal receivers along the transformer windings. The different signal generators emit scattered wave signals of different frequencies, which are reflected or refracted by the transformer windings and then received by the signal receivers.

[0113] The transfer matrix acquisition module 202 is configured to acquire the scattered wave transfer matrix of the transformer winding when it is not in operation based on the signal generator and the signal receiver;

[0114] The matrix group acquisition module 203 is configured to acquire, based on the signal generator and the signal receiver, the scattered wave transfer matrices of the transformer winding under normal operation at preset phase intervals within an operation cycle of the transformer winding under normal operation, and form a scattered wave transfer matrix group under normal operation of the transformer winding;

[0115] The first transfer array module 204 is configured to obtain a matrix norm correlation coefficient between each scattered wave transfer matrix in the scattered wave transfer matrix group under the normal operating state of the transformer winding and the scattered wave transfer matrix under the non-operating state of the transformer winding, to form an initial transfer array;

[0116] The second transfer array module 205 is configured to obtain a matrix norm correlation coefficient between each scattered wave transfer matrix in the scattered wave transfer matrix group under the current operating state of the transformer winding and the scattered wave transfer matrix under the non-operating state of the transformer winding, to form a current transfer array;

[0117] The winding state determination module 206 is configured to determine the transformer winding state according to the initial transfer array and the current transfer array.

[0118] In some implementations, the transfer matrix acquisition module 202 is further configured to:

[0119] Acquiring scattered wave signals of different frequencies emitted by the signal generator;

[0120] Acquiring a scattered wave signal received by the signal receiver;

[0121] Based on the scattered wave signals of different frequencies emitted by the signal generator and the scattered wave signals received by the signal receiver, a scattered wave transfer matrix is established when the transformer winding is not in operation. The scattered wave transfer matrix represents the changes of the scattered wave signals passing through the transformer winding. The scattered wave transfer matrix is: , to is the signal amplitude emitted by each signal generator, to is the signal amplitude received by each signal receiver, S 1N To S NN are the elements of the scattered wave transfer matrix.

[0122] In some embodiments, the first transfer array module 204 is further configured to:

[0123] According to [S pn ]=(S p1 ,S p2 ···, Spi ), obtain each scattered wave transfer matrix in the scattered wave transfer matrix group under the normal operating state of the transformer winding, wherein, [S pn ] is the scattered wave transfer matrix group under normal operation of transformer winding, S pi is the scattered wave transfer matrix when the pi phase changes within the operating voltage variation cycle;

[0124] according to Determining a matrix norm correlation coefficient between a scattered wave transfer matrix when the pi phase changes under a normal operating state of the transformer winding and a scattered wave transfer matrix when the transformer winding is not operating;

[0125] in, , , is the mean square error of the transfer matrix modulus at different scattered wave frequencies fn when the pi phase changes, is the mean square error of the transfer matrix modulus at different scattered wave frequencies fn when pi is not running, is the scattered wave transfer matrix when the transformer winding is not in operation, is the scattered wave transfer matrix model when the pi phase changes within the operating voltage variation cycle, and are the transfer matrix moduli at the scattered wave frequency fn when the pi phase changes and when the pi is not in operation, N is the number of scattered wave frequency points, which is also the number of the signal generator and the signal receiver, and n represents the sequence number of the scattered wave frequency point. and are the average values of the transfer matrix modulus at each frequency point when the pi phase changes and when the position is not in operation;

[0126] When the transformer winding is in normal operation, the matrix module correlation coefficient of each scattered wave transfer matrix of the preset phase interval in the scattered wave transfer matrix group and the scattered wave transfer matrix when the transformer winding is not in operation is obtained to form an initial transfer array: [CSM(0)]=[ ( ), ( ),··· ( )].

[0127] In some embodiments, the second transfer array module 205 is further configured to:

[0128] Based on the signal generator and the signal receiver, within an operation cycle of the transformer winding currently operating, the scattered wave transfer matrices of the transformer winding in the current operation state are acquired one by one at preset phase intervals to form a scattered wave transfer matrix group in the current operation state of the transformer winding;

[0129] Obtain the matrix module correlation coefficient between each scattered wave transfer matrix in the scattered wave transfer matrix group under the current operating state of the transformer winding and the scattered wave transfer matrix under the non-operating state of the transformer winding to form the current transfer array: [CSM(x)]=[ ( ), ( ),··· ( )].

[0130] In some embodiments, the winding state determination module 206 is further configured to:

[0131] comparing the initial transfer array and the current transfer array;

[0132] Determining whether a similarity feature quantity between the initial transfer array and the current transfer array exceeds a threshold;

[0133] If the similarity feature quantity between the initial transfer array and the current transfer array exceeds a threshold, the transformer winding is deformed;

[0134] If the similarity feature quantity between the initial transfer array and the current transfer array does not exceed a threshold, the transformer winding state is normal.

[0135] In some embodiments, the winding state determination module 206 is further configured to:

[0136] Consider the initial transfer array and the current transfer array as two vectors;

[0137] Determining a similarity feature quantity between the initial transfer array and the current transfer array according to a normalized Manhattan distance or a Euclidean distance between the two vectors;

[0138] It is determined whether the similarity feature exceeds a threshold.

[0139] In some embodiments, the transformer winding deformation detection device further includes:

[0140] Among the pairs of signal generators and signal receivers matched in number arranged along the transformer winding, the signal generators and the signal receivers are respectively arranged on both sides of the oil tank wall of the transformer.

[0141] For other details of how the above technical solutions are implemented by each module in the transformer winding deformation detection device, please refer to the description of the transformer winding deformation detection method provided above, which will not be repeated here.

[0142] In the embodiment of the present application, a computer device is provided. Figure 3 , Figure 3 3 is a schematic diagram of the structure of a computer device in one embodiment. The device includes a memory 301 and a processor 302. The memory 301 stores a computer program. When the computer program is executed by the processor 302, the processor 302 performs the following steps:

[0143] A plurality of pairs of signal generators and signal receivers are arranged along the transformer windings, wherein the different signal generators emit scattered wave signals of different frequencies, which are received by the signal receivers after being reflected or refracted by the transformer windings;

[0144] Based on the signal generator and the signal receiver, obtaining a scattered wave transfer matrix of the transformer winding when it is not in operation;

[0145] Based on the signal generator and the signal receiver, within an operation cycle of the normal operation of the transformer winding, the scattered wave transfer matrices of the transformer winding under normal operation are obtained one by one at preset phase intervals to form a scattered wave transfer matrix group under normal operation of the transformer winding;

[0146] Obtaining a matrix norm correlation coefficient between each scattered wave transfer matrix in the scattered wave transfer matrix group under the normal operating state of the transformer winding and the scattered wave transfer matrix under the non-operating state of the transformer winding to form an initial transfer array;

[0147] Obtaining a matrix norm correlation coefficient between each scattered wave transfer matrix in the scattered wave transfer matrix group under the current operating state of the transformer winding and the scattered wave transfer matrix under the non-operating state of the transformer winding to form a current transfer array;

[0148] The transformer winding state is determined according to the initial transfer array and the current transfer array.

[0149] Among them, the processor 302 can also be called a CPU (Central Processing Unit), and the processor 302 may be an integrated circuit chip with signal processing capabilities; the processor 302 can also be a general-purpose processor, DSP (Digital Signal Processor), ASIC (Application Specific Integrated Circuit), FPGA (Field Programmable Gate Array) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, among which the general-purpose processor can be a microprocessor or the processor 302 can also be any conventional processor, etc.

[0150] In an embodiment of the present application, a computer readable storage medium is provided. Figure 4 , Figure 4 FIG4 is a schematic diagram of the structure of a computer-readable storage medium in one embodiment, wherein the storage medium stores a readable computer program 401; wherein the computer program 401 may be stored in the storage medium in the form of a software product, and includes a number of instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to perform the following steps:

[0151] A plurality of pairs of signal generators and signal receivers are arranged along the transformer windings, wherein the different signal generators emit scattered wave signals of different frequencies, which are received by the signal receivers after being reflected or refracted by the transformer windings;

[0152] Based on the signal generator and the signal receiver, obtaining a scattered wave transfer matrix of the transformer winding when it is not in operation;

[0153] Based on the signal generator and the signal receiver, within an operation cycle of the normal operation of the transformer winding, the scattered wave transfer matrices of the transformer winding under normal operation are obtained one by one at preset phase intervals to form a scattered wave transfer matrix group under normal operation of the transformer winding;

[0154] Obtaining a matrix norm correlation coefficient between each scattered wave transfer matrix in the scattered wave transfer matrix group under the normal operating state of the transformer winding and the scattered wave transfer matrix under the non-operating state of the transformer winding to form an initial transfer array;

[0155] Obtaining a matrix norm correlation coefficient between each scattered wave transfer matrix in the scattered wave transfer matrix group under the current operating state of the transformer winding and the scattered wave transfer matrix under the non-operating state of the transformer winding to form a current transfer array;

[0156] The transformer winding state is determined according to the initial transfer array and the current transfer array.

[0157] The aforementioned storage media include: USB flash drives, mobile hard drives, magnetic disks or optical disks, ROM (Read-Only Memory), RAM (Random Access Memory), and other media that can store program codes, or terminal devices such as computers, service machines, mobile phones, and tablets.

[0158] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program. The program can be stored in a non-volatile computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0159] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0160] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A method for detecting transformer winding deformation, characterized in that: The method comprises: A number of pairs of signal generators and signal receivers are arranged along the transformer windings. Different signal generators emit scattered wave signals of different frequencies, which are reflected or refracted by the transformer windings and then received by the signal receivers. Based on the signal generator and the signal receiver, obtaining a scattered wave transfer matrix of the transformer winding when it is not in operation; Based on the signal generator and the signal receiver, within an operation cycle of the normal operation of the transformer winding, the scattered wave transfer matrices of the transformer winding under normal operation are obtained one by one at preset phase intervals to form a scattered wave transfer matrix group under normal operation of the transformer winding; Obtaining a matrix norm correlation coefficient between each scattered wave transfer matrix in the scattered wave transfer matrix group under the normal operating state of the transformer winding and the scattered wave transfer matrix under the non-operating state of the transformer winding to form an initial transfer array; Obtaining a matrix norm correlation coefficient between each scattered wave transfer matrix in the scattered wave transfer matrix group under the current operating state of the transformer winding and the scattered wave transfer matrix under the non-operating state of the transformer winding to form a current transfer array; determining a state of the transformer winding according to the initial transfer array and the current transfer array; The step of obtaining a matrix norm correlation coefficient between each scattered wave transfer matrix in the scattered wave transfer matrix group under the normal operating state of the transformer winding and the scattered wave transfer matrix under the non-operating state of the transformer winding to form an initial transfer array includes: According to [S pn ]=(S p1 ,S p2 ···, S pi ), obtain each scattered wave transfer matrix in the scattered wave transfer matrix group under the normal operating state of the transformer winding, wherein, [S pn ] is the scattered wave transfer matrix group under normal operation of transformer winding, S pi is the scattered wave transfer matrix when the pi phase changes within the operating voltage variation cycle; according to Determining a matrix norm correlation coefficient between a scattered wave transfer matrix when the pi phase changes under a normal operating state of the transformer winding and a scattered wave transfer matrix when the transformer winding is not operating; in, , , is the mean square error of the transfer matrix modulus at different scattered wave frequencies fn when the pi phase changes, is the mean square error of the transfer matrix modulus at different scattered wave frequencies fn when pi is not running, is the scattered wave transfer matrix when the transformer winding is not in operation, is the scattered wave transfer matrix model when the pi phase changes within the operating voltage variation cycle, and are the transfer matrix moduli at the scattered wave frequency fn when the pi phase changes and when the pi is not in operation, N is the number of scattered wave frequency points, which is also the number of the signal generator and the signal receiver, and n represents the sequence number of the scattered wave frequency point. and are the average values of the transfer matrix modulus at each frequency point when the pi phase changes and when the position is not in operation; When the transformer winding is in normal operation, the matrix module correlation coefficient of each scattered wave transfer matrix of the preset phase interval in the scattered wave transfer matrix group and the scattered wave transfer matrix when the transformer winding is not in operation is obtained to form an initial transfer array: [CSM(0)]=[ ( ), ( ),··· ( )]; The determining the transformer winding state according to the initial transfer array and the current transfer array specifically includes: comparing the initial transfer array and the current transfer array; Determining whether a similarity feature quantity between the initial transfer array and the current transfer array exceeds a threshold; If the similarity feature quantity between the initial transfer array and the current transfer array exceeds a threshold, the transformer winding is deformed; If the similarity feature quantity between the initial transfer array and the current transfer array does not exceed a threshold, the transformer winding state is normal.

2. The transformer winding deformation detection method according to claim 1, characterized in that: The step of obtaining a scattered wave transfer matrix of the transformer winding when the transformer winding is not in operation based on the signal generator and the signal receiver includes: Acquiring scattered wave signals of different frequencies emitted by the signal generator; Acquiring a scattered wave signal received by the signal receiver; Based on the scattered wave signals of different frequencies emitted by the signal generator and the scattered wave signals received by the signal receiver, a scattered wave transfer matrix is established when the transformer winding is not in operation. The scattered wave transfer matrix represents the changes of the scattered wave signals passing through the transformer winding. The scattered wave transfer matrix is: ,in, to is the signal amplitude emitted by each signal generator, to is the signal amplitude received by each signal receiver, S 1N To S NN are the elements of the scattered wave transfer matrix.

3. The transformer winding deformation detection method according to claim 2, characterized in that: The step of obtaining a matrix norm correlation coefficient between each scattered wave transfer matrix in the scattered wave transfer matrix group under the current operating state of the transformer winding and the scattered wave transfer matrix under the non-operating state of the transformer winding to form a current transfer array includes: Based on the signal generator and the signal receiver, within an operation cycle of the transformer winding currently operating, the scattered wave transfer matrices of the transformer winding in the current operation state are obtained one by one at preset phase intervals to form a scattered wave transfer matrix group in the current operation state of the transformer winding; Obtain the matrix module correlation coefficient between each scattered wave transfer matrix in the scattered wave transfer matrix group under the current operating state of the transformer winding and the scattered wave transfer matrix under the non-operating state of the transformer winding to form the current transfer array: [CSM(x)]=[ ( ), ( ),··· ( )].

4. The transformer winding deformation detection method according to claim 3, characterized in that: The determining whether the similarity feature quantity between the initial transfer array and the current transfer array exceeds a threshold value includes: Consider the initial transfer array and the current transfer array as two vectors; Determining a similarity feature quantity between the initial transfer array and the current transfer array according to a normalized Manhattan distance or a Euclidean distance between the two vectors; It is determined whether the similarity feature exceeds a threshold.

5. The transformer winding deformation detection method according to claim 4, characterized in that: The method further comprises: Among the pairs of signal generators and signal receivers that are matched in number and arranged along the transformer winding, the signal generators and the signal receivers are respectively and correspondingly arranged on both sides of the oil tank wall of the transformer.

6. A transformer winding deformation detection device, characterized in that: The device comprises: A scattered wave signal transmission module is used to set up a number of matching pairs of signal generators and signal receivers along the transformer windings. Different signal generators emit scattered wave signals of different frequencies, which are reflected or refracted by the transformer windings and then received by the signal receivers. A transfer matrix acquisition module, configured to acquire, based on the signal generator and the signal receiver, a scattered wave transfer matrix of the transformer winding when the transformer winding is not in operation; a matrix group acquisition module, configured to acquire, based on the signal generator and the signal receiver, the scattered wave transfer matrices of the transformer winding under normal operation at preset phase intervals within an operation cycle of the transformer winding under normal operation, and form a scattered wave transfer matrix group under normal operation of the transformer winding; A first transfer array module is configured to obtain a matrix norm correlation coefficient between each scattered wave transfer matrix in the scattered wave transfer matrix group under the normal operating state of the transformer winding and the scattered wave transfer matrix under the non-operating state of the transformer winding, to form an initial transfer array; A second transfer array module is configured to obtain a matrix norm correlation coefficient between each scattered wave transfer matrix in the scattered wave transfer matrix group under the current operating state of the transformer winding and the scattered wave transfer matrix under the non-operating state of the transformer winding, to form a current transfer array; A winding state judgment module, configured to judge the transformer winding state according to the initial transfer array and the current transfer array; The step of obtaining a matrix norm correlation coefficient between each scattered wave transfer matrix in the scattered wave transfer matrix group under the normal operating state of the transformer winding and the scattered wave transfer matrix under the non-operating state of the transformer winding to form an initial transfer array includes: According to [S pn ]=(S p1 ,S p2 ···, S pi ), obtain each scattered wave transfer matrix in the scattered wave transfer matrix group under the normal operating state of the transformer winding, wherein, [S pn ] is the scattered wave transfer matrix group under normal operation of transformer winding, S pi is the scattered wave transfer matrix when the pi phase changes within the operating voltage variation cycle; according to Determining a matrix norm correlation coefficient between a scattered wave transfer matrix when the pi phase changes under a normal operating state of the transformer winding and a scattered wave transfer matrix when the transformer winding is not operating; in, , , is the mean square error of the transfer matrix modulus at different scattered wave frequencies fn when the pi phase changes, is the mean square error of the transfer matrix modulus at different scattered wave frequencies fn when pi is not running, is the scattered wave transfer matrix when the transformer winding is not in operation, is the scattered wave transfer matrix model when the pi phase changes within the operating voltage variation cycle, and are the transfer matrix moduli at the scattered wave frequency fn when the pi phase changes and when the pi is not in operation, N is the number of scattered wave frequency points, which is also the number of the signal generator and the signal receiver, and n represents the sequence number of the scattered wave frequency point. and are the average values of the transfer matrix modulus at each frequency point when the pi phase changes and when the position is not in operation; When the transformer winding is in normal operation, the matrix module correlation coefficient of each scattered wave transfer matrix of the preset phase interval in the scattered wave transfer matrix group and the scattered wave transfer matrix when the transformer winding is not in operation is obtained to form an initial transfer array: [CSM(0)]=[ ( ), ( ),··· ( )]; The determining the transformer winding state according to the initial transfer array and the current transfer array specifically includes: comparing the initial transfer array and the current transfer array; Determining whether a similarity feature quantity between the initial transfer array and the current transfer array exceeds a threshold; If the similarity feature quantity between the initial transfer array and the current transfer array exceeds a threshold, the transformer winding is deformed; If the similarity feature quantity between the initial transfer array and the current transfer array does not exceed a threshold, the transformer winding state is normal.

7. A computer device, characterized in that: The method comprises a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the method according to any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that A computer program is stored, and when the computer program is executed by a processor, the processor is caused to perform the steps of the method according to any one of claims 1 to 5.

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