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

Abstract

The invention discloses a transformer winding deformation detection method, device and equipment and a storage medium, and the method comprises the steps: arranging a plurality of pairs of signal generators and signal receivers, which are matched in number, along a transformer winding, and obtaining a scattered wave transfer matrix in a non-operation state of the transformer winding; the method comprises the following steps: in an operation period, acquiring scattered wave transfer matrixes of a transformer winding in a normal operation state one by one at a preset phase interval, acquiring matrix modulus correlation coefficients of the scattered wave transfer matrixes and the scattered wave transfer matrixes of the transformer winding in a non-operation state, and forming an initial transfer array; obtaining a matrix modulus correlation coefficient between each scattered wave transfer matrix in the scattered wave transfer matrix group of the transformer winding in the current operation state and the scattered wave transfer matrix of the transformer winding in the non-operation state to form a current transfer array; and judging the state of the transformer winding according to the initial transmission array and the current transmission array. The method can visually evaluate the mechanical state of the transformer winding, and is more accurate and simpler.

Description

Technical Field

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

[0002] A transformer is a very important device in the power system, responsible for the transmission and distribution of electrical energy. One of the main faults of a transformer is the winding mechanical fault. Currently, the mainstream methods for evaluating the mechanical state of the winding include the short-circuit impedance method, the vibration frequency response method, and the vibration detection method. However, the above methods all indirectly reflect the mechanical state of the winding through the electrical and mechanical parameters of the transformer, and it is difficult to directly evaluate the mechanical state of the transformer winding. Summary of the Invention

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

[0004] An embodiment of the present application provides a transformer winding deformation detection method, and the method includes: Set a number of pairs of signal generators and signal receivers that match in number along the transformer winding. 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; Based on the signal generators and signal receivers, obtain the scattered wave transfer matrix of the transformer winding in the unoperated state; Based on the signal generators and signal receivers, within one operating cycle of the normal operation of the transformer winding, obtain the scattered wave transfer matrix of the transformer winding in the normal operation state one by one at a preset phase interval, and form a set of scattered wave transfer matrices of the transformer winding in the normal operation state; Obtain the matrix modulus correlation coefficient between each scattered wave transfer matrix in the set of scattered wave transfer matrices of the transformer winding in the normal operation state and the scattered wave transfer matrix of the transformer winding in the unoperated state, and form an initial transfer array; Obtain the matrix modulus correlation coefficient between each scattered wave transfer matrix in the set of scattered wave transfer matrices of the transformer winding in the current operation state and the scattered wave transfer matrix of the transformer winding in the unoperated state, and form a current transfer array; Judge the state of the transformer winding according to the initial transfer array and the current transfer array.

[0005] In some embodiments, the obtaining the scattered wave transfer matrix of the transformer winding in the unoperated state based on the signal generators and signal receivers includes: Obtain the scattered wave signals of different frequencies emitted by the signal generators; Obtain the scattered wave signal received by the signal receiver; According to the scattered wave signals with different frequencies emitted by the signal generator and the scattered wave signals received by the signal receiver, establish the scattered wave transfer matrix of the transformer winding in the unoperated state. The scattered wave transfer matrix represents the changes that occur inside the transformer winding for the scattered wave signals, and the scattered wave transfer matrix is , where, to are the signal amplitudes emitted by each signal generator, to are the signal amplitudes received by each signal receiver, S 1N to S NN are the elements of the scattered wave transfer matrix.

[0006] In some embodiments, obtain the matrix modulus correlation coefficients between each scattered wave transfer matrix in the scattered wave transfer matrix group of the transformer winding in the normal operation state and the scattered wave transfer matrix of the transformer winding in the unoperated state, and form an initial transfer array, including; According to [S pn = (S p1 , S p2 ···, S pi ), obtain each scattered wave transfer matrix in the scattered wave transfer matrix group of the transformer winding in the normal operation state, where [S pn is the scattered wave transfer matrix group of the transformer winding in the normal operation state, and S pi is the scattered wave transfer matrix when the phase changes at pi within the operating voltage change period; According to determine the matrix modulus correlation coefficient between the scattered wave transfer matrix when the phase changes at pi in the normal operation state of the transformer winding and the scattered wave transfer matrix of the transformer winding in the unoperated state; where, , , is the mean square error of the transfer matrix modulus at different scattered wave frequencies fn when the phase changes at pi, is the mean square error of the transfer matrix modulus at different scattered wave frequencies fn in the unoperated state when pi, is the scattered wave transfer matrix of the transformer winding in the unoperated state, is the scattered wave transfer matrix modulus when the phase changes at pi within the operating voltage change period, and They are the transfer matrix moduli at the scattered wave frequency fn when the pi phase changes and at the non-operating position respectively. N is the number of scattered wave frequency points, which is also the number of the signal generator and the signal receiver. n represents the serial number of the scattered wave frequency point. and They are the average values of the transfer matrix moduli at each frequency point when the pi phase changes and at the non-operating position respectively. Under the normal operating state of the transformer winding, obtain the matrix modulus correlation coefficients between each scattered wave transfer matrix with a preset phase interval in the scattered wave transfer matrix group and the scattered wave transfer matrix of the transformer winding in the non-operating state, and form an initial transfer array: [CSM(0)] = ( ), ( ), ··· ( )].

[0007] In some embodiments, obtaining the matrix modulus correlation coefficients between each scattered wave transfer matrix in the scattered wave transfer matrix group of the transformer winding in the current operating state and the scattered wave transfer matrix of the transformer winding in the non-operating state, and forming a current transfer array, includes: Based on the signal generator and the signal receiver, within one operating cycle of the current operation of the transformer winding, obtain the scattered wave transfer matrices of the transformer winding in the current operating state one by one at a preset phase interval, and form a scattered wave transfer matrix group of the transformer winding in the current operating state; Obtain the matrix modulus correlation coefficients between each scattered wave transfer matrix in the scattered wave transfer matrix group of the transformer winding in the current operating state and the scattered wave transfer matrix of the transformer winding in the non-operating state, and form a current transfer array: [CSM(x)] = ( ), ( ), ··· ( )].

[0008] In some embodiments, the determining the state of the transformer winding according to the initial transfer array and the current transfer array specifically includes: Compare the initial transfer array and the current transfer array; Judge whether the similarity characteristic quantity of the initial transfer array and the current transfer array exceeds the threshold; If the similarity characteristic quantity of the initial transfer array and the current transfer array exceeds the threshold, the transformer winding is deformed; If the similarity feature quantity of the initial transfer array and the current transfer array does not exceed the threshold, the state of the transformer winding is normal.

[0009] In some embodiments, determining whether the similarity feature quantity of the initial transfer array and the current transfer array exceeds the threshold includes: Regarding the initial transfer array and the current transfer array as two vectors; Determining the similarity feature quantity of the initial transfer array and the current transfer array according to the normalized Manhattan distance or Euclidean distance between the two vectors; Judging whether the similarity feature quantity exceeds the threshold.

[0010] In some embodiments, the method further includes: Among the several pairs of signal generators and signal receivers with matching quantities 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.

[0011] An embodiment of the present application further provides a transformer winding deformation detection device, and the device includes: A scattered wave signal transmission module, configured to arrange several pairs of signal generators and signal receivers with matching quantities along the transformer winding, and different signal generators emit scattered wave signals with different frequencies, which are received by the signal receivers after being reflected or refracted by the transformer winding; A transfer matrix acquisition module, configured to acquire the scattered wave transfer matrix of the transformer winding in the unoperated state based on the signal generators and signal receivers; A matrix group acquisition module, configured to acquire, based on the signal generators and signal receivers, the scattered wave transfer matrices of the transformer winding in the normal operation state one by one at a preset phase interval within one operation cycle of the normal operation of the transformer winding, and form a scattered wave transfer matrix group of the transformer winding in the normal operation state; A first transfer array module, configured to acquire the matrix modulus correlation coefficients between each scattered wave transfer matrix in the scattered wave transfer matrix group of the transformer winding in the normal operation state and the scattered wave transfer matrix of the transformer winding in the unoperated state, and form an initial transfer array; A second transfer array module, configured to acquire the matrix modulus correlation coefficients between each scattered wave transfer matrix in the scattered wave transfer matrix group of the transformer winding in the current operation state and the scattered wave transfer matrix of the transformer winding in the unoperated state, and form a current transfer array; A winding state judgment module, configured to judge the state of the transformer winding according to the initial transfer array and the current transfer array.

[0012] The embodiments of the present application further provide a computer device, including a memory and a processor. The memory stores a computer program. When the computer program is executed by the processor, the processor performs the following steps: Set a number of pairs of signal generators and signal receivers that match in quantity along the transformer winding. 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. Based on the signal generators and signal receivers, obtain the scattered wave transfer matrix of the transformer winding in the unoperated state. Based on the signal generators and signal receivers, within one operating cycle of the normal operation of the transformer winding, obtain the scattered wave transfer matrices of the transformer winding in the normal operation state one by one at a preset phase interval, and form a set of scattered wave transfer matrices of the transformer winding in the normal operation state. Obtain the matrix modulus correlation coefficients between each scattered wave transfer matrix in the set of scattered wave transfer matrices of the transformer winding in the normal operation state and the scattered wave transfer matrix of the transformer winding in the unoperated state, and form an initial transfer array. Obtain the matrix modulus correlation coefficients between each scattered wave transfer matrix in the set of scattered wave transfer matrices of the transformer winding in the current operating state and the scattered wave transfer matrix of the transformer winding in the unoperated state, and form a current transfer array. Judge the state of the transformer winding according to the initial transfer array and the current transfer array.

[0013] The embodiments of the present application further provide a computer-readable storage medium, storing a computer program. When the computer program is executed by a processor, the processor performs the following steps: Set a number of pairs of signal generators and signal receivers that match in quantity along the transformer winding. 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. Based on the signal generators and signal receivers, obtain the scattered wave transfer matrix of the transformer winding in the unoperated state. Based on the signal generators and signal receivers, within one operating cycle of the normal operation of the transformer winding, obtain the scattered wave transfer matrices of the transformer winding in the normal operation state one by one at a preset phase interval, and form a set of scattered wave transfer matrices of the transformer winding in the normal operation state. Obtain the matrix modulus correlation coefficients between each scattered wave transfer matrix in the set of scattered wave transfer matrices of the transformer winding in the normal operation state and the scattered wave transfer matrix of the transformer winding in the unoperated state, and form an initial transfer array. Obtain the matrix modulus correlation coefficient between each scattering wave transfer matrix in the scattering wave transfer matrix group of the transformer winding under the current operating state and the scattering wave transfer matrix of the transformer winding under the non-operating state, and form a current transfer array; Judge the state of the transformer winding according to the initial transfer array and the current transfer array.

[0014] Adopting the embodiments of the present application has the following beneficial effects: In the transformer winding deformation detection method provided by the embodiments of the present application, by arranging a number of pairs of signal generators and signal receivers with matching quantities along the transformer winding and emitting scattering wave signals with different frequencies, small structural changes inside the winding can be captured, thereby improving the accuracy of transformer winding deformation detection. By comparing the scattering wave transfer matrices obtained one by one at preset phase intervals within one operating cycle of the normal operation of the transformer winding and within one operating cycle of the current operation, the state change of the transformer winding can be monitored in real time, which helps to timely detect potential problems such as winding deformation, prevent the expansion of faults, and form an initial transfer array and a current transfer array by calculating the matrix modulus correlation coefficient. The comparison result of these two arrays is used as an important basis for judging the state of the transformer winding, intuitively evaluating the mechanical state of the transformer winding, and making the judgment process more objective and clear. Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0016] Among them: Figure 1 It is a schematic flowchart of a transformer winding deformation detection method in an embodiment; Figure 2 It is a structural diagram of a transformer winding deformation detection device in an embodiment; Figure 3 It is a schematic structural diagram of a computer device in an embodiment; Figure 4 It is a schematic structural diagram of a computer-readable storage medium in an embodiment. Detailed Embodiments

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present application in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope of protection of the present application.

[0018] In an embodiment of the present application, a method for detecting transformer winding deformation is provided. Please refer to Figure 1 , Figure 1 which is a schematic flowchart of the method for detecting transformer winding deformation in an embodiment; the method for detecting transformer winding deformation includes steps S1 to S6.

[0019] Step S1, a number of pairs of signal generators and signal receivers are arranged along the transformer winding. 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. In some embodiments, the method further includes: Among the number of pairs of signal generators and signal receivers 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.

[0020] In some embodiments, N signal generators and N signal receivers are arranged on the transformer oil tank wall. It is recommended that both the signal generators and the signal receivers be arranged at positions directly facing the transformer winding. The frequencies of the N signal generators are all different, and the receiving signal frequencies of the signal receivers are required to include all the frequencies of the signal generators.

[0021] Step S2, based on the signal generators and signal receivers, obtain the scattered wave transfer matrix of the transformer winding in the unoperated state. In some embodiments, the obtaining the scattered wave transfer matrix of the transformer winding in the unoperated state based on the signal generators and signal receivers includes: Obtain the scattered wave signals of different frequencies emitted by the signal generators; Obtain the scattered wave signals received by the signal receivers; According to the scattered wave signals of different frequencies emitted by the signal generators and the scattered wave signals received by the signal receivers, establish the scattered wave transfer matrix of the transformer winding in the unoperated state. The scattered wave transfer matrix represents the changes that occur to the scattered wave signals inside the transformer winding. The scattered wave transfer matrix is , where to are the signal amplitudes emitted by each signal generator. to are the signal amplitudes received by each signal receiver, S 1N to S NN are the elements of the scattered wave transfer matrix.

[0022] Specifically, after the scattered wave signal is emitted by the signal generator and reflected and refracted by each component in the transformer, it is received by the signal receiver. The signal emitted by the signal generator is [P] = (P 1 , P 2 , ···, P N ), and the signal received by the signal receiver is [Q] = (Q 1 , Q 2 , ···, Q N ). The change of the scattered wave signal in the transformer can be represented by a transfer matrix: , collect the scattered wave transfer matrix S 0 of the transformer winding in the unoperated state.

[0023] Step S3, based on the signal generator and the signal receiver, within one operating cycle of the normal operation of the transformer winding, obtain the scattered wave transfer matrices of the normal operation state of the transformer winding one by one at a preset phase interval, and form a set of scattered wave transfer matrices of the normal operation state of the transformer winding; Specifically, collect a set of scattered wave transfer matrices [S pn = (S p1 , S p2 ···, S pi ) in the normal operation state. Under normal operation conditions, the electrodynamic force on the winding changes periodically with the change of the operating voltage of the transformer. Therefore, within one cycle of the operating voltage, obtain the scattered wave transfer matrices at a certain phase interval to form a set of scattered wave transfer matrices in the normal operation state. Generally, the phase interval is taken as 1° to 3° to form a set of scattered wave transfer matrices of the normal operation state of the transformer winding.

[0024] Step S4, obtain the matrix modulus correlation coefficients between each scattered wave transfer matrix in the set of scattered wave transfer matrices of the normal operation state of the transformer winding and the scattered wave transfer matrix of the unoperated state of the transformer winding, and form an initial transfer array; In some embodiments, the obtaining of the matrix modulus correlation coefficients between each scattered wave transfer matrix in the set of scattered wave transfer matrices of the normal operation state of the transformer winding and the scattered wave transfer matrix of the unoperated state of the transformer winding to form an initial transfer array includes; According to [S pn = (S p1 , S p2···, S pi ), obtain each scattering wave transfer matrix in the scattering wave transfer matrix group under the normal operation state of the transformer winding, where, [S pn is the scattering wave transfer matrix group under the normal operation state of the transformer winding, S pi is the scattering wave transfer matrix when the phase changes at pi within the operating voltage change period; According to determine the matrix modulus correlation coefficient between the scattering wave transfer matrix when the phase changes at pi under the normal operation state of the transformer winding and the scattering wave transfer matrix of the transformer winding in the non-operating state; Among them, , , is the mean square deviation of the transfer matrix modulus at different scattering wave frequencies fn when the phase changes at pi, is the mean square deviation of the transfer matrix modulus at different scattering wave frequencies fn in the non-operating state of pi, is the scattering wave transfer matrix of the transformer winding in the non-operating state, is the modulus of the scattering wave transfer matrix when the phase changes at pi within the operating voltage change period, and are respectively the transfer matrix moduli at the scattering wave frequency fn when the phase changes at pi and at the non-operating position, N is the number of scattering wave frequency points and also the number of the signal generator and the signal receiver, n represents the serial number of the scattering wave frequency point, and are respectively the averages of the transfer matrix moduli at each frequency point when the phase changes at pi and at the non-operating position; Under the normal operation state of the transformer winding, obtain the matrix modulus correlation coefficients between each scattering wave transfer matrix with a preset phase interval in the scattering wave transfer matrix group and the scattering wave transfer matrix of the transformer winding in the non-operating state, and form an initial transfer array: [CSM(0)] = ( ), ( ), ··· ( )].

[0025] Step S5, obtain the matrix modulus correlation coefficients between each scattering wave transfer matrix in the scattering wave transfer matrix group under the current operation state of the transformer winding and the scattering wave transfer matrix of the transformer winding in the non-operating state, and form a current transfer array; In some embodiments, obtaining the matrix modulus correlation coefficient between each scattering wave transfer matrix in the scattering wave transfer matrix group of the transformer winding in the current operating state and the scattering wave transfer matrix of the transformer winding in the non-operating state, and forming a current transfer array, includes: Based on the signal generator and the signal receiver, within one operating cycle of the current operation of the transformer winding, obtain the scattering wave transfer matrices of the transformer winding in the current operating state one by one at a preset phase interval, and form a scattering wave transfer matrix group of the transformer winding in the current operating state; Obtain the matrix modulus correlation coefficient between each scattering wave transfer matrix in the scattering wave transfer matrix group of the transformer winding in the current operating state and the scattering wave transfer matrix of the transformer winding in the non-operating state, and form a current transfer array: [CSM(x)] = ( ), ( ), ··· ( )].

[0026] Step S6, judging the state of the transformer winding according to the initial transfer array and the current transfer array.

[0027] In some embodiments, the judging the state of the transformer winding according to the initial transfer array and the current transfer array specifically includes: Comparing the initial transfer array and the current transfer array; Judging whether the similarity characteristic quantity of the initial transfer array and the current transfer array exceeds a threshold; If the similarity characteristic quantity of the initial transfer array and the current transfer array exceeds the threshold, the transformer winding is deformed; If the similarity characteristic quantity of the initial transfer array and the current transfer array does not exceed the threshold, the state of the transformer winding is normal.

[0028] In some embodiments, the judging whether the similarity characteristic quantity of the initial transfer array and the current transfer array exceeds the threshold includes: Regarding the initial transfer array and the current transfer array as two vectors; Determining the similarity characteristic quantity of the initial transfer array and the current transfer array according to the normalized Manhattan distance or Euclidean distance between the two vectors; Judging whether the similarity characteristic quantity exceeds the threshold.

[0029] Specifically, use the displacement index of the transfer matrix to detect the displacement of the transformer winding. Based on the scattering wave transfer matrix S of the transformer winding in the non-operating state0 , and the scattering wave transfer matrix group [Spi] = (Sp1, Sp2 ···, SpI) under the normal operating state, calculate the position index reference data; First, calculate the correlation coefficient of the modulus of each transfer matrix ( ):

[0030]

[0031]

[0032] is the correlation coefficient between the matrix modulus under the pi phase change and the initial position matrix modulus. and are the transfer matrix moduli at the pi phase change and the initial position at the scattering wave frequency fn, respectively. N is the number of scattering wave frequency points and also the number of signal generators and signal receivers. and are the average values of the transfer matrix moduli at the pi phase change and the initial position at each frequency point, respectively.

[0033] The correlation coefficients of the scattering wave transfer matrix moduli between each phase in the normal operating state and the non-operating state ( ) can form a reference array.

[0034] During the actual operation of the transformer, repeat step S5 to monitor in real time the correlation coefficients of the scattering wave transfer matrix moduli between each phase and the non-operating state within one operating voltage cycle under the current operating state ( ), and form an array.

[0035] Compare the similarity of the two arrays. If the similarity characteristic quantity exceeds a certain threshold, the transformer winding is deformed. The two arrays can be regarded as two vectors respectively, and calculate the similarity characteristic quantities such as the Manhattan distance and Euclidean distance between the two vectors. If it exceeds a certain threshold, the difference between the two vectors is too large, indicating that the transformer scattering wave transfer matrix has changed greatly compared with the normal operating state, and the transformer winding is deformed. If the similarity characteristic quantity of the initial transfer array and the current transfer array does not exceed the threshold, the transformer winding is in a normal state. The preferred value of the threshold is 5%.

[0036] In some embodiments, the calculation method of the normalized Euclidean distance is: ; The calculation method of the normalized Manhattan distance is: 。

[0037] Adopting the technical solution of this embodiment, the concept of scattered wave signal is introduced. Through the cooperation of a signal generator and a signal receiver, the intuitive detection of the state of the transformer winding is realized. A number of pairs of signal generators and signal receivers with matching quantities are arranged along the transformer winding, and scattered wave signals with different frequencies are emitted. This setting method can cover the transformer winding more comprehensively and improve the accuracy of detection; by obtaining the scattered wave transfer matrix of the transformer winding in the unoperated state and comparing the scattered wave transfer matrices in the normal operation state and the current operation state, it is possible to more accurately judge whether the transformer winding is deformed; it is required to obtain the scattered wave transfer matrix one by one at preset phase intervals within an operating cycle of the normal operation of the transformer winding. This method realizes the real-time monitoring of the transformer winding, helps to detect potential problems such as winding deformation in a timely manner, and prevents the occurrence of faults; by calculating the matrix modulus correlation coefficient, an initial transfer array and a current transfer array are formed, and the comparison result of these two arrays is used as an important basis for judging the state of the transformer winding, making the judgment process more objective and clear; this method is relatively simple and does not require the disassembly or complex pretreatment of the transformer, reducing the 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 popularization and application of the technical solution of this embodiment. It not only improves the accuracy and efficiency of the transformer winding deformation detection, but also helps to ensure the safe and stable operation of the power system.

[0038] In the embodiment of the present application, a transformer winding deformation detection device is provided. Please refer to Figure 2 , Figure 2 which is a structural diagram of the transformer winding deformation detection device in an 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.

[0039] Among them, the scattered wave signal transmission module 201 is configured to arrange a number of pairs of signal generators and signal receivers with matching quantities along the transformer winding. The different signal generators emit scattered wave signals with different frequencies, which are received by the signal receivers after being reflected or refracted by the transformer winding; The transfer matrix acquisition module 202 is configured to obtain the scattered wave transfer matrix of the transformer winding in the unoperated state based on the signal generator and the signal receiver; The matrix group acquisition module 203 is configured to obtain, based on the signal generator and the signal receiver, the scattering wave transfer matrices in the normal operating state of the transformer winding one by one at a preset phase interval within one operating cycle of the normal operation of the transformer winding, and form a scattering wave transfer matrix group in the normal operating state of the transformer winding; The first transfer array module 204 is configured to obtain the matrix modulus correlation coefficients between each scattering wave transfer matrix in the scattering wave transfer matrix group in the normal operating state of the transformer winding and the scattering wave transfer matrix in the non-operating state of the transformer winding, and form an initial transfer array; The second transfer array module 205 is configured to obtain the matrix modulus correlation coefficients between each scattering wave transfer matrix in the scattering wave transfer matrix group in the current operating state of the transformer winding and the scattering wave transfer matrix in the non-operating state of the transformer winding, and form a current transfer array; The winding state judgment module 206 is configured to judge the state of the transformer winding according to the initial transfer array and the current transfer array.

[0040] In some embodiments, the transfer matrix acquisition module 202 is further configured to: Obtain the scattering wave signals with different frequencies emitted by the signal generator; Obtain the scattering wave signals received by the signal receiver; According to the scattering wave signals with different frequencies emitted by the signal generator and the scattering wave signals received by the signal receiver, establish the scattering wave transfer matrix in the non-operating state of the transformer winding, where the scattering wave transfer matrix represents the changes that occur inside the transformer winding for the scattering wave signals, and the scattering wave transfer matrix is , to are the signal amplitudes emitted by each signal generator, to are the signal amplitudes received by each signal receiver, S 1N to S NN are the respective elements of the scattering wave transfer matrix.

[0041] In some embodiments, the first transfer array module 204 is further configured to: According to [S pn =(S p1 , S p2 ···, S pi ), obtain each scattering wave transfer matrix in the scattering wave transfer matrix group in the normal operating state of the transformer winding, where, [S pn is the scattering wave transfer matrix group in the normal operating state of the transformer winding, Spi is the scattering wave transfer matrix at the pi phase change within the operating voltage change period; According to determine the matrix modulus correlation coefficient between the scattering wave transfer matrix at the pi phase change in the normal operating state of the transformer winding and the scattering wave transfer matrix in the non-operating state of the transformer winding; Among them, , , is the mean square error of the transfer matrix modulus at different scattering wave frequencies fn during the pi phase change, is the mean square error of the transfer matrix modulus at different scattering wave frequencies fn in the non-operating state of pi, is the scattering wave transfer matrix in the non-operating state of the transformer winding, is the modulus of the scattering wave transfer matrix at the pi phase change within the operating voltage change period, and are the transfer matrix moduli at the scattering wave frequency fn during the pi phase change and at the non-operating position respectively, N is the number of scattering wave frequency points and also the number of the signal generator and the signal receiver, n represents the serial number of the scattering wave frequency point, and are the averages of the transfer matrix moduli at each frequency point during the pi phase change and at the non-operating position respectively; In the normal operating state of the transformer winding, obtain the matrix modulus correlation coefficients between each scattering wave transfer matrix with a preset phase interval in the scattering wave transfer matrix group and the scattering wave transfer matrix in the non-operating state of the transformer winding, and form an initial transfer array: [CSM(0)] = ( ), ( ), ··· ( )].

[0042] In some embodiments, the second transfer array module 205 is further configured to: Based on the signal generator and the signal receiver, within one operating cycle of the current operation of the transformer winding, obtain the scattering wave transfer matrix of the current operating state of the transformer winding one by one at a preset phase interval, and form a scattering wave transfer matrix group of the current operating state of the transformer winding; Obtain the matrix modulus correlation coefficients between each scattering wave transfer matrix in the scattering wave transfer matrix group of the current operating state of the transformer winding and the scattering wave transfer matrix in the non-operating state of the transformer winding, and form a current transfer array: [CSM(x)] = ( ), ( ), ··· ( )]。

[0043] In some embodiments, the winding state determination module 206 is further configured to: Compare the initial transfer array and the current transfer array; Determine 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 the threshold, the transformer winding is deformed; If the similarity feature quantity between the initial transfer array and the current transfer array does not exceed the threshold, the state of the transformer winding is normal.

[0044] In some embodiments, the winding state determination module 206 is further configured to: Regard the initial transfer array and the current transfer array as two vectors; Determine the similarity feature quantity between the initial transfer array and the current transfer array according to the normalized Manhattan distance or Euclidean distance between the two vectors; Determine whether the similarity feature quantity exceeds the threshold.

[0045] In some embodiments, the transformer winding deformation detection device further includes: Among the several pairs of signal generators and signal receivers with a matching quantity arranged along the transformer winding, the signal generators and the signal receivers are respectively arranged on two sides of the oil tank wall of the transformer.

[0046] For other details of each module in the transformer winding deformation detection device to implement the above technical solution, reference may be made to the description in the above-provided transformer winding deformation detection method, which will not be elaborated here.

[0047] In an embodiment of the present application, a computer device is provided. Please refer to Figure 3 , Figure 3 which is a schematic structural diagram of a computer device in an 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 is caused to execute the following steps: Arrange several pairs of signal generators and signal receivers with a matching quantity along the transformer winding. Different signal generators emit scattered wave signals with different frequencies, which are received by the signal receivers after being reflected or refracted by the transformer winding; Based on the signal generator and the signal receiver, obtain the scattering wave transfer matrix of the transformer winding in the non-operating state; Based on the signal generator and the signal receiver, within one operating cycle of the normal operation of the transformer winding, obtain the scattering wave transfer matrix of the transformer winding in the normal operation state one by one at preset phase intervals, and form a set of scattering wave transfer matrices of the transformer winding in the normal operation state; Obtain the matrix modulus correlation coefficients between each scattering wave transfer matrix in the set of scattering wave transfer matrices of the transformer winding in the normal operation state and the scattering wave transfer matrix of the transformer winding in the non-operating state, and form an initial transfer array; Obtain the matrix modulus correlation coefficients between each scattering wave transfer matrix in the set of scattering wave transfer matrices of the transformer winding in the current operation state and the scattering wave transfer matrix of the transformer winding in the non-operating state, and form a current transfer array; Judge the state of the transformer winding according to the initial transfer array and the current transfer array.

[0048] 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, a DSP (Digital Signal Process), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gata Array), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. The general-purpose processor can be a microprocessor or the processor 302 can also be any conventional processor, etc.

[0049] In the embodiment of the present application, a computer-readable storage medium is provided. Please refer to Figure 4 , Figure 4 is a schematic structural diagram of a computer-readable storage medium in an embodiment. A readable computer program 401 is stored on the storage medium; among them, the computer program 401 can be stored in the above storage medium in the form of a software product, including several instructions for causing a computer device (which can be a personal computer, a service machine, or a network device, etc.) or a processor to execute the following steps: Set a number of pairs of signal generators and signal receivers with a matching quantity along the transformer winding. The different signal generators emit scattering wave signals of different frequencies, which are received by the signal receivers after being reflected or refracted by the transformer winding; Based on the signal generator and the signal receiver, obtain the scattering wave transfer matrix of the transformer winding in the unoperated state; Based on the signal generator and the signal receiver, within one operating cycle of the normal operation of the transformer winding, obtain the scattering wave transfer matrices of the transformer winding in the normal operation state one by one at preset phase intervals, and form a set of scattering wave transfer matrices of the transformer winding in the normal operation state; Obtain the matrix modulus correlation coefficients between each scattering wave transfer matrix in the set of scattering wave transfer matrices of the transformer winding in the normal operation state and the scattering wave transfer matrix of the transformer winding in the unoperated state, and form an initial transfer array; Obtain the matrix modulus correlation coefficients between each scattering wave transfer matrix in the set of scattering wave transfer matrices of the transformer winding in the current operation state and the scattering wave transfer matrix of the transformer winding in the unoperated state, and form a current transfer array; Judge the state of the transformer winding according to the initial transfer array and the current transfer array.

[0050] The aforementioned storage medium includes: various media that can store program codes such as USB flash drives, mobile hard disks, magnetic disks or optical discs, ROM (Read-Only Memory), RAM (Random Access Memory), etc., or terminal devices such as computers, server machines, mobile phones, and tablets.

[0051] Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing 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 methods. Among them, any reference to a memory, storage, database, or other medium used in the embodiments provided in the present application can include non-volatile and / or volatile memories. 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 many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), Rambus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and Rambus dynamic RAM (RDRAM), etc.

[0052] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, 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, it should be considered as the scope recorded in this specification.

[0053] The above-described embodiments merely represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A transformer winding deformation detection method, characterized in that: The method comprises: A plurality of pairs of signal generators and signal receivers are arranged along the transformer windings, wherein 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; Based on the signal generator and the signal receiver, a scattered wave transfer matrix of the transformer winding when it is not in operation is obtained; 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 matrix of the transformer winding under normal operation is obtained one by one at preset phase intervals to form a scattered wave transfer matrix group under normal operation of the transformer winding; Obtaining the matrix norm correlation coefficient between each scattered wave transfer matrix in the scattered wave transfer matrix group under the normal operation state of the transformer winding and the scattered wave transfer matrix under the non-operation state of the transformer winding to form an initial transfer array; Obtaining a matrix modulus 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; The transformer winding state is determined according to the initial transfer array and the current transfer array.

2. The transformer winding deformation detection method according to claim 1, characterized in that: The step of obtaining the scattered wave transfer matrix of the transformer winding when it 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; According to 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 inside of 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 the matrix modulus correlation coefficient between each scattered wave transfer matrix in the scattered wave transfer matrix group under the normal operation state of the transformer winding and the scattered wave transfer matrix under the non-operation 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 change cycle; according to Determine the matrix norm correlation coefficient of the scattered wave transfer matrix when the pi phase changes under the normal operation state of the transformer winding and the scattered wave transfer matrix when the transformer winding is not in operation; 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 change cycle, and are the transfer matrix modulus 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, and also the number of the signal generator and the signal receiver, n represents the scattered wave frequency point serial number, 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 modulus correlation coefficient between each scattered wave transfer matrix at a 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)]=[ ( ), ( ),··· ( )].

4. The transformer winding deformation detection method according to claim 3, characterized in that: The step of obtaining the matrix modulus 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 matrix of the transformer winding in the current operating state is obtained one by one at a preset phase interval to form a scattered wave transfer matrix group of the transformer winding in the current operating state; Obtain the matrix modulus 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: [CSM(x)]=[ ( ), ( ),··· ( )].

5. The transformer winding deformation detection method according to claim 4, characterized in that: The step of 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 the 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 value, the transformer winding state is normal.

6. The transformer winding deformation detection method according to claim 5, characterized in that: The determining whether the similarity feature quantity between the initial transfer array and the current transfer array exceeds a threshold comprises: Consider the initial transfer array and the current transfer array as two vectors; Determine the similarity feature quantity between the initial transfer array and the current transfer array according to the normalized Manhattan distance or the Euclidean distance between the two vectors; It is determined whether the similarity feature exceeds a threshold.

7. The transformer winding deformation detection method according to claim 6, characterized in that: The method further comprises: Among the plurality of 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 two sides of the oil tank wall of the transformer.

8. A transformer winding deformation detection device, characterized in that: The device comprises: A scattered wave signal transmission module is used to set a number of matched pairs of signal generators and signal receivers along the transformer windings, wherein 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; A transfer matrix acquisition module, used for acquiring the scattered wave transfer matrix of the transformer winding when it is not in operation based on the signal generator and the signal receiver; A matrix group acquisition module is used to acquire the scattered wave transfer matrix of the transformer winding under normal operation state one by one at preset phase intervals within an operation cycle of the transformer winding under normal operation based on the signal generator and the signal receiver, so as to form a scattered wave transfer matrix group under normal operation state of the transformer winding; A first transfer array module is used to obtain a matrix norm correlation coefficient between each scattered wave transfer matrix in the scattered wave transfer matrix group under the normal operation state of the transformer winding and the scattered wave transfer matrix under the non-operation state of the transformer winding to form an initial transfer array; A second transfer array module is used to obtain a matrix modulus 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 is used to judge the transformer winding state according to the initial transfer array and the current transfer array.

9. 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 7.

10. 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 7.

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