Multiphase current balance state representation method and apparatus, electronic device, and storage medium

Abstract

A multiphase current balance state representation method and apparatus, an electronic device, and a storage medium. The method comprises: on the basis of each single-phase current value of each phase of a transformer corresponding to each detection point, obtaining each current difference value of each phase corresponding to each detection point (102); on the basis of each current difference value of each phase corresponding to each detection point, and a preset balance range, determining each balance state analysis label corresponding to each detection point (104); and matching each imbalance label of each phase with each balance state analysis label corresponding to each detection point to generate an imbalance state representation graph of the transformer corresponding to each imbalance label of each phase (106). According to the method, the imbalance state representation graph of the transformer corresponding to each imbalance label of each phase is generated, and each imbalance state of each phase is decomposed and displayed, so that the complex imbalance state of each phase in the transformer can be easily identified, improving the maintenance efficiency of a complex imbalance transformer.

Description

Multiphase current balance state representation method, device, electronic device and storage medium Technical Field

[0001] The present application relates to the field of data processing technology, and in particular to a method, device, electronic device, storage medium, and computer program product for representing a multi-phase current balance state. Background Art

[0002] Distribution transformers are the primary power supply equipment for low-voltage power grids. Since most low-voltage distribution systems utilize a three-phase, four-wire wiring system, single-phase load imbalance is a common problem. Current imbalance in three-phase transformers is primarily caused by factors such as unequal impedance in the distribution system or unequal loads on the three phases of the transformer. If a distribution transformer operates in a state of three-phase imbalance for a long period of time, it can lead to increased losses in the transformer and distribution lines, reduced active power output of motors and transformers, and damage to electrical equipment.

[0003] Current mainstream multiphase current balance analysis charts primarily depict the current balance status of multiple phases by plotting the current value variation curves for each phase. However, these curve-based analysis charts cannot provide maintenance personnel with an intuitive understanding of the imbalance cycle of each phase, nor can they display phase imbalance conditions in complex situations.

[0004] Summary of the Invention

[0005] In view of this, the multi-phase current balance state representation method, device, electronic device, storage medium and computer program product provided in this application can be used to easily identify the complex imbalance state of each phase of the transformer and improve the maintenance efficiency of complex unbalanced transformers.

[0006] According to a first aspect of an embodiment of the present application, a method for representing a multi-phase current balance state is provided, comprising: obtaining current differences corresponding to each detection point for each phase of the transformer based on single-phase current values ​​corresponding to each detection point; analyzing the multi-phase current balance state of each detection point based on current differences corresponding to each detection point for each phase and a preset balance range, and determining balance state analysis labels corresponding to each detection point, wherein each balance state analysis label includes an unbalance label for one phase or a multi-phase balance label; matching each unbalance label for each phase with each balance state analysis label corresponding to each detection point to generate an unbalance state representation diagram of the transformer corresponding to each unbalance label for each phase.

[0007] According to a second aspect of an embodiment of the present application, a multi-phase current balance state representation device is provided, comprising: a calculation module for obtaining current difference values ​​corresponding to each detection point of each phase according to single-phase current values ​​corresponding to each detection point of each phase of the transformer; an analysis module for analyzing the multi-phase current balance state of each detection point according to current difference values ​​corresponding to each detection point of each phase and a preset balance range, and determining balance state analysis labels corresponding to each detection point, wherein each balance state analysis label consists of an unbalance label of one phase or a multi-phase balance label; a generation module for matching each unbalance label of each phase with each balance state analysis label corresponding to each detection point, and generating an unbalance state representation diagram of the transformer corresponding to each unbalance label of each phase.

[0008] According to a third aspect of an embodiment of the present application, an electronic device is provided, comprising: a processor, a memory, a communication interface and a bus, wherein the processor, the memory and the communication interface communicate with each other through the bus; the memory is used to store at least one executable instruction, and the executable instruction enables the processor to perform operations corresponding to the multi-phase current balance state representation method described in the first aspect above.

[0009] According to a fourth aspect of an embodiment of the present application, a computer-readable storage medium is provided, on which computer instructions are stored. When the computer instructions are executed by a processor, the processor executes the multi-phase current balance state representation method as described in the first aspect above.

[0010] According to a fifth aspect of an embodiment of the present application, a computer program product is provided, comprising computer instructions, wherein the computer instructions instruct a computing device to perform operations corresponding to the method described in the first aspect.

[0011] It can be seen from the above technical solution that the present application analyzes the multi-phase current balance state of each detection point to determine the balance state analysis labels corresponding to each detection point, and matches each unbalance label of each phase with the balance state analysis labels corresponding to each detection point respectively to decompose and display each unbalance state of each phase. It is particularly suitable for displaying the complex unbalance state of each phase in the transformer, which can improve the maintenance efficiency of complex unbalanced transformers. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] FIG1 is a flow chart of a method for representing a multi-phase current balance state according to an exemplary embodiment of the present application.

[0013] FIG2 is a flow chart of a method for representing a multi-phase current balance state according to another exemplary embodiment of the present application.

[0014] FIG3 is a flow chart of a method for representing a multi-phase current balance state according to another exemplary embodiment of the present application.

[0015] FIG. 4 exemplarily shows an imbalance state density diagram generated based on the method described in FIG. 3 .

[0016] FIG5 is a schematic diagram of a device for indicating a multi-phase current balance state according to an exemplary embodiment of the present application.

[0017] FIG6 is a schematic diagram of an electronic device according to an exemplary embodiment of the present application.

[0018] List of reference numerals:

[0019] 102: According to the single-phase current values ​​of each phase of the transformer corresponding to each detection point, the current difference values ​​of each phase corresponding to each detection point are obtained.

[0020] 104: Analyze the multiphase current balance state of each detection point based on the current difference value of each phase corresponding to each detection point and the preset balance range, and determine the balance state analysis label corresponding to each detection point

[0021] 106. Match each unbalanced label of each phase with each balanced state analysis label corresponding to each detection point to generate an unbalanced state representation diagram of the transformer corresponding to each unbalanced label of each phase.

[0022] 202. Determine any one of the detection points as the current detection point

[0023] 204. According to the current difference of each phase corresponding to the current detection point and the preset balance range, the phase whose current difference does not fall within the preset balance range is determined as the unbalanced phase of the current detection point.

[0024] 206. Identify the unbalanced phase in each phase of the current detection point and determine the balance state analysis label of the current detection point

[0025] 302. Arrange the balance state analysis label of each test point according to the test date and test time of each test point to generate the balance state analysis matrix of the transformer

[0026] 304. Determine an unbalanced label of any phase as a target label

[0027] 306. Match the target label with each imbalance state label in the equilibrium state analysis matrix, replace each imbalance state label that matches the target label with a matching label, and replace each imbalance state label that does not match the target label with an unmatched label.

[0028] 308. Generate a matching matrix of the target label based on each matching label and each non-matching label in the equilibrium state analysis matrix

[0029] 310. Using the convolution window, perform convolution processing on each matching label and each unmatched label in the matching matrix of the target label to generate an imbalanced state density map of the transformer corresponding to the target label.

[0030] 500, multi-phase current balance state display device 502, calculation module 504, analysis module

[0031] 506, generating module 600, electronic device 602, processor

[0032] 604, communication interface 606, memory 608, bus

[0033] 610, Procedure DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the technical solutions in the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field should fall within the scope of protection of the embodiments of the present application.

[0035] The following describes some embodiments of the present application in detail with reference to the accompanying drawings. The following embodiments and features thereof may be combined with one another unless they conflict with each other. The steps in the following method embodiments are for illustrative purposes only and are not intended to limit the present invention.

[0036] Current imbalance in distribution transformers can easily lead to increased losses in the transformer and distribution lines, reduced motor and transformer output, and damage to electrical equipment. Therefore, monitoring the load imbalance between each phase of the transformer is crucial to maintaining optimal equipment performance and ensuring safe operation.

[0037] The current mainstream multi-phase current balance state analysis chart mainly displays the balance state between multi-phase currents by drawing the current value change curve of each phase. However, the change curve analysis chart cannot provide maintenance personnel with an intuitive understanding of the imbalance cycle of each phase, and the visual effect of the analysis chart is poor. In addition, when the imbalance state of each phase in the transformer becomes complex, the staff cannot accurately analyze this complex imbalance state through the change curve analysis chart, resulting in significant difficulties in the current monitoring and maintenance of the complex imbalance state of the transformer.

[0038] Based on the above problems, the embodiments of the present application provide a multi-phase current balance state representation method, which can not only improve the visualization efficiency of the imbalance state of each phase in the transformer, but also clearly display the complex imbalance state of each phase of the transformer, thereby improving the maintenance and monitoring efficiency of complex unbalanced transformers.

[0039] The following describes in detail the multi-phase current balance state representation method, device, electronic device and storage medium provided in the embodiments of the present application in conjunction with the accompanying drawings.

[0040] Method for expressing multiphase current balance state

[0041] FIG1 is a flow chart of a method for representing a multi-phase current balance state according to an exemplary embodiment of the present application. As shown in FIG1 , the method for representing a multi-phase current balance state according to the present embodiment mainly includes the following steps:

[0042] Step 102: Obtain current differences corresponding to each detection point for each phase according to the single-phase current values ​​corresponding to each detection point for each phase of the transformer.

[0043] In this embodiment, the transformer includes a distribution transformer, such as a three-phase transformer, but is not limited thereto, and other types of multi-phase transformers are also applicable to this application.

[0044] In some embodiments, the single-phase current of each phase of the transformer can be detected based on a preset detection interval time to obtain the current detection values ​​corresponding to each detection point of each phase, and normalization processing can be performed on the current detection values ​​corresponding to each detection point of each phase based on a preset value range to obtain the single-phase current values ​​corresponding to each detection point of each phase.

[0045] For example, taking a three-phase transformer as an example, if the preset detection interval is set to 15 minutes, the single-phase current corresponding to the first phase, second phase, and third phase of the three-phase transformer can be detected every 15 minutes, and the first phase current detection value, second phase current detection value, and third phase current detection value corresponding to each detection point of the three-phase transformer can be obtained. According to the preset value range [0,1], the first phase current detection value, second phase current detection value, and third phase current detection value of the three-phase transformer corresponding to each detection point can be normalized and preprocessed. The current detection value of each phase corresponding to each detection point is limited to the value range of 0 to 1, and the single-phase current value (first phase current value, second phase current value, third phase current value) corresponding to each detection point of each phase is obtained.

[0046] In some embodiments, each current difference corresponding to each detection point in each phase can be obtained by:

[0047] For any current detection point among the detection points, the current average value of the current detection point is obtained based on the single-phase current value of each phase of the transformer corresponding to the current detection point, and the difference calculation is performed based on the single-phase current value of each phase corresponding to the current detection point and the current average value of the current detection point to obtain the current difference of each phase corresponding to the current detection point.

[0048] Specifically, an addition and averaging calculation can be performed based on the single-phase current value of each phase of the transformer corresponding to the current detection point to obtain the average current value at the current detection point. A current difference value for each phase corresponding to the current detection point (i.e., the current difference between each phase and the current average value at the current detection point) is obtained by performing a difference calculation between each single-phase current value at the current detection point and the current average value at the current detection point.

[0049] In some embodiments, the current difference of each phase corresponding to the current detection point can be calculated using the following formula 1: ij =(x ij -u i ) / u i (Formula 1)

[0050] In the above formula 1, k ij Indicates the current difference between the jth phase of the transformer and the ith detection point, x ij Indicates the single-phase current value of the transformer's j-th phase corresponding to the i-th detection point, u i Represents the average current value of the i-th detection point.

[0051] Step 104 : Analyze the multiphase current balance state of each detection point according to each current difference value of each phase corresponding to each detection point and the preset balance range, and determine each balance state analysis label corresponding to each detection point.

[0052] In this embodiment, each balance state analysis tag may be composed of an unbalanced tag of one phase, or a multi-phase balanced tag.

[0053] In some embodiments, the unbalanced phase of each detection point can be analyzed based on the current differences of each phase corresponding to each detection point and a preset balance range, and the unbalanced label of the unbalanced phase can be determined as the balance state analysis label of each detection point.

[0054] In some embodiments, each phase may include a first imbalance tag and a second imbalance tag, wherein the first imbalance tag is used to indicate an imbalance state in which the current of each phase is too high, and the second imbalance tag is used to indicate an imbalance state in which the current of each phase is too low.

[0055] In this embodiment, when the current value of each phase at a current detection point is within a normal range, the multi-phase balance tag can be determined as the balance state analysis tag of the current detection point.

[0056] Alternatively, different tag values ​​may be used to represent each imbalance tag for each phase and the multi-phase balance tags.

[0057] For example, in an embodiment of a three-phase transformer, the tag value of the first imbalance tag of the first phase can be set to +1, and the tag value of the second imbalance tag of the first phase can be set to -1; the tag value of the first imbalance tag of the second phase can be set to +2, and the tag value of the second imbalance tag of the second phase can be set to -2; the tag value of the first imbalance tag of the third phase can be set to +3, and the tag value of the second imbalance tag of the third phase can be set to -3; and the tag value of the multi-phase balance tag can be set to 0.

[0058] In some embodiments, if the single-phase current value of each phase of the transformer corresponding to the current detection point is missing, for example, if the single-phase current value of each phase of the transformer corresponding to the current detection point cannot be detected, the given data missing label can be determined as the balance state analysis label of the current detection point.

[0059] In some embodiments, the tag value of the data missing tag and the tag value of the multiphase balance tag can be set to be the same or different. For example, the tag value of the data missing tag can also be set to 0, or the tag value of the data missing tag can be set to 99.

[0060] Step 106: Match each unbalance tag of each phase with each balance state analysis tag corresponding to each detection point, and generate an unbalance state representation diagram of the transformer corresponding to each unbalance tag of each phase.

[0061] Optionally, an unbalance label of any phase can be determined as a target label, the target label is matched with each unbalance state label in the balance state analysis matrix, each unbalance state label that matches the target label is replaced with a matching label, and each unbalance state label that does not match the target label is replaced with an unmatched label. Based on each matching label and each unmatched label in the balance state analysis matrix, a representation diagram of the unbalance state of the transformer corresponding to the target label is obtained.

[0062] For example, in an embodiment of a three-phase transformer, the first imbalance tag and the second imbalance tag of each of the three phases can be used as target tags, and matched with the balance state analysis tags corresponding to each detection point, respectively, to generate six imbalance state representation diagrams of the transformer, including: an imbalance state representation diagram of the transformer corresponding to the first imbalance tag of the first phase (used to indicate an imbalance state in which the current of the first phase is too high); an imbalance state representation diagram of the transformer corresponding to the second imbalance tag of the first phase (used to indicate an imbalance state in which the current of the first phase is too low); an imbalance state representation diagram of the transformer corresponding to the first imbalance tag of the second phase (used to indicate an imbalance state in which the current of the second phase is too high); an imbalance state representation diagram of the transformer corresponding to the second imbalance tag of the second phase (used to indicate an imbalance state in which the current of the second phase is too low); an imbalance state representation diagram of the transformer corresponding to the first imbalance tag of the third phase (used to indicate an imbalance state in which the current of the third phase is too high); and an imbalance state representation diagram of the transformer corresponding to the second imbalance tag of the third phase (used to indicate an imbalance state in which the current of the third phase is too low).

[0063] Optionally, the matrix elements in the balance state analysis matrix can be filled according to the detection date and detection time of each detection point and the balance state analysis label of each detection point to generate the balance state analysis matrix of the transformer, and matching can be performed according to each unbalanced state label of each phase and each balance state analysis label in the balance state analysis matrix to generate an unbalanced state representation diagram of the transformer corresponding to each unbalance label of each phase.

[0064] The multi-phase current balance state representation scheme provided in the embodiment of the present application can decompose and display the imbalance states of different phases by generating an imbalance state representation diagram for each imbalance label of each phase of the transformer respectively, which can easily identify the complex imbalance states of each phase of the transformer and improve the maintenance efficiency of complex unbalanced transformers.

[0065] The multi-phase current balance state representation scheme provided in the embodiment of the present application calculates the current average value of each detection point based on the single-phase current value of each detection point corresponding to each phase, and dynamically calculates the current difference value corresponding to each detection point of each phase based on the current average value of each detection point, thereby improving the objectivity and accuracy of the multi-phase current balance state analysis results.

[0066] The multi-phase current balance state representation scheme provided in the embodiment of the present application replaces each imbalance state label with a matching label or an unmatched label based on the matching result between the imbalance state label of the phase and each balance state analysis label in the balance state analysis matrix to generate a binary imbalance state representation diagram. This can effectively remove noise in the image, make the image clearer and more intuitive, and improve the visualization effect of the imbalance state representation diagram.

[0067] FIG2 is a processing flow chart of a method for representing a multi-phase current balance state according to another exemplary embodiment of the present application. This embodiment shows a specific implementation of step 104. As shown in the figure, this embodiment mainly includes:

[0068] Step 202: Determine any one of the detection points as the current detection point.

[0069] For example, one of the detection points may be determined as the current detection point in sequence according to the detection time of the detection points.

[0070] Step 204 : Based on the current difference of each phase corresponding to the current detection point and the preset balance range, the phase whose current difference does not fall within the preset balance range is determined as the unbalanced phase of the current detection point.

[0071] Optionally, the preset balance range may be set to [-0.4, +0.4]. If the current difference of any phase corresponding to the current detection point is greater than +0.4 or less than -0.4, the phase is determined as the unbalanced phase of the current detection point.

[0072] It should be noted that those skilled in the art can arbitrarily set the preset balance threshold based on actual analysis requirements, application scenarios of the transformer and other factors, and this application does not impose any restrictions on this.

[0073] Step 206: Identify the unbalanced phase among the phases at the current detection point, and determine the balance state analysis label of the current detection point.

[0074] In some embodiments, if the current detection point includes only one unbalanced phase, an unbalanced tag of the unbalanced phase is determined as the balanced state analysis tag of the current detection point.

[0075] In this embodiment, the current difference of the unbalanced phase can be compared with a preset balance range. If the current difference of the unbalanced phase is greater than the upper limit of the preset balance range, the first unbalance tag of the unbalanced phase is determined as the balance state analysis tag of the current detection point. If the current difference of the unbalanced phase is less than the lower limit of the preset balance range, the second unbalance tag of the unbalanced phase is determined as the balance state analysis tag of the current detection point.

[0076] For example, if kij >0.4(k ij represents the current difference between the jth phase of the transformer and the ith detection point), and determines the first unbalanced label of the jth phase (unbalanced phase) as the balance state analysis label of the ith detection point (current detection point); if k ij <-0.4, the second imbalance label of the j-th phase (imbalance phase) is determined as the balance state analysis label of the i-th detection point (current detection point).

[0077] In some embodiments, if the current detection point includes multiple unbalanced phases, the absolute values ​​of the differences corresponding to the current unbalanced phases are determined, and an unbalance label of the unbalanced phase with the largest absolute value of the difference is determined as the balance state analysis label of the current detection point.

[0078] Taking a three-phase transformer as an example, if both the first phase and the second phase are determined to be unbalanced phases at the current detection point, and the current difference of the first phase corresponding to the current detection point is -0.6 and the current difference of the second phase corresponding to the current detection point is +0.5, it can be determined that the absolute value of the difference of the first phase corresponding to the current detection point is 0.6, and the absolute value of the difference of the second phase corresponding to the current detection point is 0.5. Since the absolute value of the difference of the first phase is greater than the absolute value of the difference of the second phase, and the current difference of the first phase corresponding to the current detection point is less than the preset balance range, the second imbalance label of the first phase can be determined as the balance state analysis label of the current detection point.

[0079] In some embodiments, if the current detection point does not include an unbalanced phase, a preset multi-phase balance tag may be determined as the balance state analysis tag of the current detection point.

[0080] In this embodiment, different label values ​​may be used to represent each imbalance label of each phase and the multi-phase balance labels.

[0081] For example, in an embodiment of a three-phase transformer, the tag value of the first imbalance tag of the first phase can be set to +1, and the tag value of the second imbalance tag of the first phase can be set to -1; the tag value of the first imbalance tag of the second phase can be set to +2, and the tag value of the second imbalance tag of the second phase can be set to -2; the tag value of the first imbalance tag of the third phase can be set to +3, and the tag value of the second imbalance tag of the third phase can be set to -3; and the tag value of the multi-phase balance tag can be set to 0. Therefore, the tag value of the balance state analysis tag of the current detection point should include one of "-1", "+1", "-2", "+2", "-3", "+3", and "0".

[0082] In some embodiments, the balance state analysis tag of the current detection point may further include a tag value "99" of a data missing tag, which is used to indicate that the single-phase current value of each phase of the transformer corresponding to the current detection point is missing.

[0083] The multi-phase current balance state representation scheme provided in the embodiment of the present application determines the unbalanced phase in each phase of each detection point based on the preset balance range and the current difference of each phase corresponding to each detection point, and performs multi-dimensional analysis in combination with the absolute value of the difference between the unbalanced phases and the current difference to classify the complex current imbalance state of the detection point in detail. This can help staff to easily identify the complex situation of the unbalanced transformer according to the balance state analysis labels corresponding to each detection point, thereby improving the maintenance efficiency of complex transformers.

[0084] FIG3 is a processing flow chart of a method for representing a multi-phase current balance state according to another exemplary embodiment of the present application. This embodiment shows a specific implementation of the above-mentioned step 106. As shown in the figure, this embodiment mainly includes:

[0085] Step 302: Arrange the balance state analysis label of each detection point according to the detection date and detection time of each detection point to generate a balance state analysis matrix of the transformer.

[0086] Optionally, the number of rows and columns of the equilibrium state analysis matrix may be determined according to the detection date and detection time of each detection point.

[0087] For example, the number of columns in the equilibrium analysis matrix can be determined based on the test date of the test points. For example, if the test period is 365 days, the number of columns in the equilibrium analysis matrix can be set to 365. The number of rows in the equilibrium analysis matrix can be determined based on the test interval of the test points. For example, if the test interval is set to 15 minutes, there should be 96 test points per day, and the number of rows in the equilibrium analysis matrix can be set to 96.

[0088] Optionally, each balance state analysis tag may be filled into each matrix element of the balance state analysis matrix according to the detection date and detection time of the detection point of each balance state analysis tag to generate the balance state analysis matrix of the transformer, as shown in Matrix 1 below:

[0089] Step 304: Determine an unbalanced tag in any phase as a target tag.

[0090] Optionally, according to each imbalance tag of each phase of the transformer, an imbalance tag of one phase may be determined as a target tag in sequence.

[0091] For example, a three-phase transformer includes three phases, and each phase includes a first unbalance tag and a second unbalance tag. Therefore, one of the six unbalance tags of the three-phase transformer may be sequentially obtained to be determined as a target tag.

[0092] Step 306: Match the target label with each imbalance state label in the equilibrium state analysis matrix, replace each imbalance state label that matches the target label with a matching label, and replace each imbalance state label that does not match the target label with an unmatched label.

[0093] For example, when the target label is the first unbalance label of the first phase of a three-phase transformer, the label value of the target label is matched with the element value of each matrix element based on the unbalance state label of each matrix element in the balance state analysis matrix. For any current matrix element among the matrix elements, if the label value of the current matrix element is the same as the label value of the target label, the label value (or element value) of the current matrix element is replaced with the label value of the matching label; if the label value of the current matrix element is different from the label value of the target label, the label value of the current matrix element is replaced with the label value of the unmatched label.

[0094] In this embodiment, the tag value of the matching tag may be set to "1", and the tag value of the non-matching tag may be set to "0".

[0095] Step 308: Generate a matching matrix of the target label according to each matching label and each non-matching label in the equilibrium state analysis matrix.

[0096] For example, when the label value of the matching label is set to "1" and the label value of the unmatched label is set to "0", after matching the equilibrium state analysis matrix shown in the above matrix 1 with the target label with the label value of "+1", the binary matrix 2 shown below can be obtained:

[0097] Step 310: Use a convolution window to perform convolution processing on each matching label and each unmatched label in the matching matrix of the target label to generate an imbalance state density map of the transformer corresponding to the target label.

[0098] Optionally, a convolution window can be used to repeatedly perform sliding processing on the matching matrix that meets a preset sliding step size, determine the sub-matrix of the matching matrix corresponding to each sliding processing, and use the convolution parameters in the convolution window to perform a convolution operation on at least one matching label and / or at least one unmatched label in each sub-matrix to obtain at least one convolution value in each sub-matrix; based on each convolution value in each sub-matrix, each convolution value in the matching matrix is ​​obtained, and based on each convolution value in the matching matrix, a density map of the imbalance state of the transformer corresponding to the target label is generated.

[0099] For example, in an embodiment of a three-phase transformer, six imbalance density maps of the transformer can be generated based on the six balance state analysis tags of the three-phase transformer. The "a-" map indicates that the current in phase a of the three-phase transformer is below the preset balance range, the "a+" map indicates that the current in phase a of the three-phase transformer is above the preset balance range, the "b-" map indicates that the current in phase b of the three-phase transformer is below the preset balance range, the "b+" map indicates that the current in phase b of the three-phase transformer is above the preset balance range, the "c-" map indicates that the current in phase c of the three-phase transformer is below the preset balance range, and the "c+" map indicates that the current in phase c of the three-phase transformer is above the preset balance range. Furthermore, the color depth in each map indicates the likelihood of phase imbalance; darker colors indicate a higher probability of phase imbalance.

[0100] In some embodiments, the window size of the convolution window may be set to 4×5, and each convolution parameter in the convolution window may be set to 0.5.

[0101] It should be noted that those skilled in the art can arbitrarily adjust the window size, sliding step and convolution parameters of the convolution window according to factors such as the data noise of the original data, the display effect requirements of the imbalance state representation diagram, and the performance requirements of the processing system. This application does not impose any restrictions on this.

[0102] The multi-phase current balance state representation scheme provided in the embodiment of the present application determines a target label from each unbalance label of each phase, and matches each target label with each unbalance state label in the balance state analysis matrix to generate an unbalance state representation diagram of the transformer corresponding to each target label. By using the technical means of decomposing and displaying each unbalance state of each phase, the complex unbalance conditions of the transformer can be easily identified, thereby improving the maintenance effect of complex unbalanced transformers.

[0103] The multi-phase current balance state representation scheme provided in the embodiment of the present application uses a preset convolution window to smooth the values ​​of each element in the matching matrix, generating an unbalanced state density map of the transformer corresponding to the target label, thereby improving the visualization effect of the analysis diagram.

[0104] Multiphase current balance status indication device

[0105] Corresponding to the above method embodiment, FIG5 shows a schematic diagram of a multi-phase current balance state representation device according to an embodiment of the present application. As shown in FIG5 , the multi-phase current balance state representation device 500 includes:

[0106] A calculation module 502 is configured to obtain current differences corresponding to each detection point in each phase according to each single-phase current value corresponding to each detection point in each phase of the transformer;

[0107] An analysis module 504 is configured to analyze the multiphase current balance state of each detection point based on the current differences of each phase corresponding to each detection point and a preset balance range, and determine a balance state analysis tag corresponding to each detection point, where each balance state analysis tag is composed of an imbalance tag or a multiphase balance tag for each phase;

[0108] The generating module 506 matches each unbalance tag of each phase with each balance state analysis tag corresponding to each detection point, and generates an unbalance state representation diagram of the transformer corresponding to each unbalance tag of each phase.

[0109] Optionally, the calculation module 502 is also used to obtain the current average value of the current detection point according to the single-phase current value of each phase of the transformer corresponding to the current detection point for any current detection point among the detection points; perform difference calculation according to the single-phase current value of each phase corresponding to the current detection point and the current average value of the current detection point to obtain the current difference value of each phase corresponding to the current detection point.

[0110] Optionally, the analysis module 504 is further configured to: for any current detection point among the detection points; determine, based on the current difference of each phase corresponding to the current detection point and the preset balance range, a phase whose current difference does not fall within the preset balance range as the unbalanced phase of the current detection point; identify the unbalanced phase among the phases of the current detection point, and if the current detection point contains an unbalanced phase, determine an unbalanced label of the unbalanced phase as the balanced state analysis label of the current detection point; if the current detection point contains multiple unbalanced phases, determine, based on the current differences of each unbalanced phase corresponding to the current detection point, the absolute values ​​of the differences of each unbalanced phase corresponding to the current detection point, and determine an unbalanced label of the unbalanced phase with the largest absolute value of the difference as the balanced state analysis label of the current detection point; if the current detection point does not contain an unbalanced phase, determine the multi-phase balance label as the balanced state analysis label of the current detection point.

[0111] Optionally, each phase includes a first unbalanced label and a second unbalanced label.

[0112] Optionally, the analysis module 504 is further configured to, when determining an unbalance tag of an unbalanced phase as the balance state analysis tag of the current detection point, compare the current difference of the unbalanced phase with the preset balance range; if the current difference of the unbalanced phase is greater than an upper limit of the preset balance range, determine the first unbalance tag of the unbalanced phase as the balance state analysis tag of the current detection point; and if the current difference of the unbalanced phase is less than a lower limit of the preset balance range, determine the second unbalance tag of the unbalanced phase as the balance state analysis tag of the current detection point.

[0113] Optionally, the generation module 506 is further configured to arrange the balance state analysis label of each detection point according to the detection date and detection time of each detection point, and generate a balance state analysis matrix of the transformer; and perform matching according to each unbalance state label of each phase with each balance state analysis label in the balance state analysis matrix, and generate an unbalance state representation diagram of the transformer corresponding to each unbalance label of each phase.

[0114] Optionally, the generation module 506 is further configured to determine an unbalance label of any phase as a target label; match the target label with each unbalance state label in the balance state analysis matrix, replace each unbalance state label that matches the target label with a matching label, and replace each unbalance state label that does not match the target label with an unmatched label; and obtain, based on each matching label and each unmatched label in the balance state analysis matrix, an unbalance state representation diagram of the transformer corresponding to the target label.

[0115] Optionally, the imbalance state representation diagram comprises an imbalance state density diagram.

[0116] Optionally, the generation module 506 is further configured to generate a matching matrix of the target label based on each matching label and each unmatched label in the balance state analysis matrix; and perform convolution processing on each matching label and each unmatched label in the matching matrix using a convolution window to generate an unbalanced state density map of the transformer corresponding to the target label.

[0117] Optionally, the generating module 506 is further configured to repeatedly perform a sliding process satisfying a preset sliding step length on the matching matrix using the convolution window, and determine a submatrix of the matching matrix corresponding to each sliding process;

[0118] Using the convolution parameters in the convolution window, a convolution operation is performed on at least one matching label and / or at least one unmatched label of each submatrix to obtain each convolution value of each submatrix; according to each convolution value of each submatrix, each convolution value of the matching matrix is ​​obtained; according to each convolution value of the matching matrix, an imbalance state density map of the transformer corresponding to the target label is generated.

[0119] Optionally, the transformer comprises a three-phase transformer.

[0120] It should be noted that the information interaction, execution process, etc. between the various units in the above-mentioned multi-phase current balance state representation device are based on the same concept as the above-mentioned multi-phase current balance state representation method embodiment. The specific content can be found in the description in the above-mentioned multi-phase current balance state representation method embodiment and will not be repeated here.

[0121] electronic devices

[0122] FIG6 is a schematic diagram of an electronic device provided in Example 4 of the present application. The specific embodiments of the present application do not limit the specific implementation of the electronic device. Referring to FIG6 , the electronic device 600 provided in the embodiment of the present application includes: a processor 602, a communications interface 604, a memory 606, and a bus 608. Among them:

[0123] The processor 602 , the communication interface 604 , and the memory 606 communicate with each other via a bus 608 .

[0124] The communication interface 604 is used to communicate with other electronic devices or servers.

[0125] The processor 602 is configured to execute a program 610 , and specifically to execute the relevant steps in the above-mentioned embodiment of the method for representing a multi-phase current balance state.

[0126] Specifically, the program 610 may include program codes, which include computer operation instructions.

[0127] Processor 602 may be a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application. The one or more processors included in the smart device may be processors of the same type, such as one or more CPUs, or may be processors of different types, such as one or more CPUs and one or more ASICs.

[0128] The memory 606 is used to store the program 610. The memory 606 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

[0129] The program 610 may be specifically configured to enable the processor 602 to execute the multi-phase current balance state representation method in any of the aforementioned embodiments.

[0130] The specific implementation of each step in program 610 can be found in the corresponding descriptions of the corresponding steps and units in the above-mentioned embodiment of the method for representing a multi-phase current balance state, and will not be repeated here. Those skilled in the art will clearly understand that for the sake of convenience and brevity of description, the specific working processes of the above-described devices and modules can refer to the corresponding process descriptions in the above-mentioned method embodiment, and will not be repeated here.

[0131] Computer-readable storage medium

[0132] This application also provides a computer-readable storage medium storing instructions for causing a machine to execute the multiphase current balance state representation method described herein. Specifically, a system or device equipped with a storage medium can be provided, wherein the storage medium stores software program code that implements the functions of any of the above-described embodiments, and a computer (or CPU or MPU) of the system or device can read and execute the program code stored in the storage medium.

[0133] In this case, the program code read from the storage medium itself can realize the function of any one of the above embodiments, so the program code and the storage medium storing the program code constitute part of this application.

[0134] Examples of storage media for providing program code include floppy disks, hard disks, magneto-optical disks, optical disks (such as CD-ROM, CD-R, CD-RW, DVD-ROM, DVD-RAM, DVD-RW, DVD+RW), magnetic tapes, non-volatile memory cards, and ROMs. Alternatively, the program code can be downloaded from a server computer via a communication network.

[0135] Computer program product

[0136] An embodiment of the present application also provides a computer program product, including computer instructions, which instruct a computing device to perform any corresponding operation in the above-mentioned multiple method embodiments.

[0137] It should be pointed out that, according to the needs of implementation, the various components / steps described in the embodiments of the present application can be split into more components / steps, or two or more components / steps or partial operations of components / steps can be combined into new components / steps to achieve the purpose of the embodiments of the present application.

[0138] The above-mentioned method according to the embodiment of the present application can be implemented in hardware, firmware, or can be implemented as software or computer code that can be stored in a recording medium (such as CD ROM, RAM, floppy disk, hard disk or magneto-optical disk), or can be implemented as computer code that is originally stored in a remote recording medium or a non-temporary machine-readable medium downloaded via a network and will be stored in a local recording medium, so that the method described herein can be stored in such software processing on a recording medium using a general-purpose computer, a special-purpose processor or programmable or special-purpose hardware (such as ASIC or FPGA). It can be understood that a computer, a processor, a microprocessor controller or programmable hardware includes a storage component (e.g., RAM, ROM, flash memory, etc.) that can store or receive software or computer code, and when the software or computer code is accessed and executed by a computer, a processor or hardware, the method described herein is implemented. In addition, when a general-purpose computer accesses the code for implementing the method shown here, the execution of the code converts the general-purpose computer into a special-purpose computer for executing the method shown here.

[0139] It should be noted that not all steps and modules in the above processes and system structure diagrams are required, and certain steps or modules can be omitted according to actual needs. The execution order of each step is not fixed and can be adjusted as needed. The system structure described in the above embodiments can be a physical structure or a logical structure, that is, some modules may be implemented by the same physical entity, or some modules may be implemented by multiple physical entities, or may be implemented by certain components in multiple independent devices.

[0140] Nouns and pronouns referring to persons in this patent application are not limited to a specific gender.

[0141] In the above embodiments, the hardware module can be implemented mechanically or electrically. For example, a hardware module can include a permanent dedicated circuit or logic (such as a dedicated processor, FPGA or ASIC) to complete the corresponding operation. The hardware module can also include programmable logic or circuits (such as a general-purpose processor or other programmable processors), which can be temporarily set by software to complete the corresponding operation. The specific implementation method (mechanical method, or dedicated permanent circuit, or temporarily set circuit) can be determined based on cost and time considerations.

[0142] The present invention has been shown and described in detail above through the accompanying drawings and preferred embodiments. However, the present invention is not limited to these disclosed embodiments. Based on the above multiple embodiments, those skilled in the art can know that the code review methods in the above different embodiments can be combined to obtain more embodiments of the present invention, and these embodiments are also within the scope of protection of the present invention.

[0143] Nouns and pronouns referring to persons in this patent application are not limited to a specific gender.

Claims

1. A method for representing a multiphase current balance state, comprising: According to the single-phase current values ​​of each phase of the transformer corresponding to each detection point, the current difference values ​​(102) of each phase corresponding to each detection point are obtained; Analyze the multiphase current balance state of each detection point according to each current difference value corresponding to each detection point of each phase and a preset balance range, and determine each balance state analysis label corresponding to each detection point, wherein each balance state analysis label includes an unbalance label or a multiphase balance label of one phase (104); Each unbalanced label of each phase is matched with each balanced state analysis label corresponding to each detection point, and an unbalanced state representation diagram (106) of the transformer corresponding to each unbalanced label of each phase is generated.

2. The method according to claim 1, wherein: The method of obtaining the current difference values ​​corresponding to the detection points of each phase of the transformer according to the single-phase current values ​​corresponding to the detection points of each phase of the transformer comprises: For any current detection point among the detection points; Obtaining an average current value of the current detection point according to a single-phase current value of each phase of the transformer corresponding to the current detection point; A difference calculation is performed based on the single-phase current value of each phase corresponding to the current detection point and the current average value of the current detection point to obtain the current difference of each phase corresponding to the current detection point.

3. The method according to claim 1, wherein: The method of analyzing the multiphase current balance state of each detection point according to each current difference value corresponding to each detection point of each phase and the preset balance range, and determining each balance state analysis label corresponding to each detection point includes: For any current detection point among the detection points; According to the current difference value of each phase corresponding to the current detection point and the preset balance range, the phase whose current difference value does not fall within the preset balance range is determined as the unbalanced phase of the current detection point; identifying an unbalanced phase among the phases of the current detection point, If the current detection point includes an unbalanced phase, determining an unbalanced label of the unbalanced phase as a balanced state analysis label of the current detection point; If the current detection point includes multiple unbalanced phases, determine the absolute values ​​of the differences of the unbalanced phases corresponding to the current detection point according to the current differences of the unbalanced phases, and determine an unbalanced label of an unbalanced phase with the largest absolute value of the difference as the balanced state analysis label of the current detection point; If the current detection point does not include an unbalanced phase, the multi-phase balance tag is determined as a balance state analysis tag of the current detection point.

4. The method according to claim 3, wherein: Each phase includes a first unbalanced label and a second unbalanced label; Wherein, in the case where an unbalanced tag of an unbalanced phase is determined as the balanced state analysis tag of the current detection point, the method further includes: comparing the current difference of the unbalanced phase with the preset balance range, If the current difference of the unbalanced phase is greater than the upper limit of the preset balance range, determining the first unbalanced label of the unbalanced phase as the balance state analysis label of the current detection point; If the current difference of the unbalanced phase is less than the lower limit of the preset balance range, the second unbalanced label of the unbalanced phase is determined as the balance state analysis label of the current detection point.

5. The method according to any one of claims 1, 3 and 4, wherein: The step of matching each unbalanced label of each phase with each balanced state analysis label corresponding to each detection point to generate an unbalanced state representation diagram of the transformer corresponding to each unbalanced label of each phase includes: Arrange the balance state analysis label of each detection point according to the detection date and detection time of each detection point, and generate the balance state analysis matrix of the transformer; Matching is performed according to each unbalanced state label of each phase and each balanced state analysis label in the balanced state analysis matrix, and an unbalanced state representation diagram of the transformer corresponding to each unbalanced label of each phase is generated.

6. The method according to claim 5, wherein: The matching is performed according to each unbalanced state label of each phase with each balanced state analysis label in the balanced state analysis matrix to generate an unbalanced state representation diagram of the transformer corresponding to each unbalanced label of each phase, including: An unbalanced label of any phase is determined as a target label; Matching the target label with each imbalance state label in the equilibrium state analysis matrix, replacing each imbalance state label that matches the target label with a matching label, and replacing each imbalance state label that does not match the target label with an unmatched label; According to each matching label and each unmatched label in the balanced state analysis matrix, an unbalanced state representation diagram of the transformer corresponding to the target label is obtained.

7. The method according to claim 6, wherein: The unbalanced state representation diagram includes an unbalanced state density diagram; And wherein, obtaining the unbalanced state representation diagram of the transformer corresponding to the target label according to each matching label and each unmatched label in the balanced state analysis matrix includes: Generate a matching matrix of the target label according to each matching label and each unmatched label in the equilibrium state analysis matrix; Using a convolution window, convolution processing is performed on each matching label and each unmatched label in the matching matrix to generate an imbalance state density map of the transformer corresponding to the target label.

8. The method according to claim 7, wherein: The method of using a convolution window to perform convolution processing on each matching label and each unmatched label in the matching matrix to generate an unbalanced state density map of the transformer corresponding to the target label includes: Using the convolution window, repeatedly performing a sliding process that satisfies a preset sliding step length on the matching matrix, and determining a submatrix of the matching matrix corresponding to each sliding process; Using the convolution parameters in the convolution window, perform a convolution operation on at least one matching label and / or at least one non-matching label of each sub-matrix to obtain each convolution value of each sub-matrix; According to each convolution value of each submatrix, obtaining each convolution value of the matching matrix; According to each convolution value of the matching matrix, a density map of the imbalance state of the transformer corresponding to the target label is generated.

9. The method according to claim 1, wherein: The transformer comprises a three-phase transformer.

10. A multi-phase current balance state indicating device (500), comprising: A calculation module (502) is used to obtain current difference values ​​corresponding to each detection point of each phase according to each single-phase current value corresponding to each detection point of each phase of the transformer; An analysis module (504) is used to analyze the multi-phase current balance state of each detection point according to each current difference value corresponding to each detection point of each phase and a preset balance range, and determine each balance state analysis label corresponding to each detection point, wherein each balance state analysis label is composed of an unbalanced label of one phase or a multi-phase balance label; The generating module (506) matches each unbalanced label of each phase with each balanced state analysis label corresponding to each detection point, and generates an unbalanced state representation diagram of the transformer corresponding to each unbalanced label of each phase.

11. An electronic device (600), comprising: A processor (602), a communication interface (604), a memory (606) and a bus (608), wherein the processor (602), the communication interface (604) and the memory (606) communicate with each other via the bus (608); The memory (606) is used to store at least one executable instruction, and the executable instruction enables the processor (602) to perform operations corresponding to the method according to any one of claims 1 to 9.

12. A computer-readable storage medium having computer instructions stored thereon, wherein when the computer instructions are executed by a processor, the processor is caused to execute the method according to any one of claims 1 to 9.

13. A computer program product, comprising computer instructions, wherein the computer instructions instruct a computing device to execute operations corresponding to the method according to any one of claims 1 to 9.

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