Method and apparatus for processing potential of circuit element in secondary circuit, and electronic device

Abstract

Embodiments of the present application provide a kind of circuit element in secondary circuit Potential processing method, device and electronic equipment.The method comprises: obtaining the information matrix and initial state information of circuit element in secondary circuit;Wherein, information matrix represents the connection relationship information and impedance information of circuit element in secondary circuit;According to information matrix and initial state information, the node matrix of node in secondary circuit is determined;Wherein, node matrix represents the node impedance of corresponding node when circuit element in secondary circuit is connected;According to the bus point position of bus connected with secondary circuit, and node matrix, the current potential of circuit element in secondary circuit is determined.The method is used to reach the effect of improving the calculation efficiency and accuracy of the potential of circuit element in secondary circuit.

Description

Technical Field

[0001] This application relates to the field of power system technology, and in particular to a method, apparatus and electronic device for potential processing of circuit elements in a secondary circuit. Background Technology

[0002] In power systems, the secondary circuits in substations are core components of protection devices, control devices, and signaling devices. Circuit elements (such as pressure plates) in substation protection devices are used to control the activation or deactivation of protection functions or the switching on and off of operating circuits. The operating status of the pressure plate can be determined by its potential.

[0003] In some techniques, the structure of the secondary circuit is analyzed manually, and the potential distribution of the circuit elements within the secondary circuit is calculated. However, these techniques suffer from low efficiency and accuracy in processing the potential of the circuit elements in the secondary circuit.

[0004] Therefore, there is an urgent need for a solution that can efficiently and accurately calculate the potential of circuit elements in a secondary circuit. Summary of the Invention

[0005] The potential processing method, apparatus, and electronic equipment for circuit elements in a secondary circuit provided in this application are used to improve the calculation efficiency and accuracy of the potential of circuit elements in a secondary circuit.

[0006] In a first aspect, embodiments of this application provide a method for potential processing of circuit elements in a secondary circuit, including:

[0007] Obtain the information matrix and initial state information of the circuit elements in the secondary loop; wherein, the information matrix represents the connection relationship information and impedance information of the circuit elements in the secondary loop;

[0008] Based on the information matrix and the initial state information, the node matrix of the nodes in the secondary loop is determined; where the node matrix represents the node impedance of the corresponding node when the circuit element in the secondary loop is connected.

[0009] The current potential of the circuit elements in the secondary circuit is determined based on the bus potential of the bus connected to the secondary circuit and the node matrix.

[0010] In one possible implementation, determining the node matrix of the nodes in the quadratic loop based on the information matrix and the initial state information includes:

[0011] Based on the connection relationship information in the information matrix, determine the nodes connected to each circuit element in the secondary loop;

[0012] Based on the initial state information and the impedance information in the information matrix, the node impedance of the corresponding node when the circuit element is connected is determined, and used as the value of the element at the corresponding position in the node matrix to obtain the node matrix.

[0013] In one possible implementation, the impedance information includes fixed impedance, combined impedance, and sectional impedance; the method further includes:

[0014] If the circuit element is a non-conversion type circuit element, then the impedance information of the circuit element is determined to be the fixed impedance corresponding to the circuit element.

[0015] If the circuit element is a conversion type circuit element, then when the initial state information of the circuit element indicates that it is in the closed state, the impedance information of the circuit element is determined to be the closed impedance of the circuit element; or when the initial state information of the circuit element indicates that it is in the open state, the impedance information of the circuit element is determined to be the open impedance of the circuit element.

[0016] In one possible implementation, the method further includes:

[0017] Determine the current of each circuit element based on its current potential in the secondary circuit.

[0018] Determine the current state information of the circuit element based on its current.

[0019] If the current state information is determined to be different from the initial state information of the circuit element, the node matrix is ​​updated according to the current state information; the updated node matrix is ​​used to calculate the updated current potential.

[0020] In one possible implementation, the method further includes:

[0021] Obtain the preset potentials of circuit elements in the secondary circuit under different operating states;

[0022] The current operating state of the circuit element is determined based on its current potential and the preset potential corresponding to different operating states.

[0023] In one possible implementation, different operating states include normal state and abnormal state;

[0024] Based on the current potential of the circuit element and the preset potential corresponding to different operating states, the current operating state of the circuit element is determined, including:

[0025] On the preset coordinate graph, the first coordinate point corresponding to the current potential of the circuit element is determined according to the current potential of the circuit element;

[0026] On the preset coordinate graph, the second coordinate point corresponding to the normal state is determined according to the preset potential corresponding to the normal state;

[0027] If the first Euclidean distance between the first coordinate point and the second coordinate point is less than or equal to a preset distance threshold, then the circuit element is determined to be in a normal operating state; otherwise, the circuit element is determined to be in an abnormal operating state.

[0028] In one possible implementation, the abnormal state includes at least one abnormal type; when the operating state of a circuit element is determined to be abnormal, the method further includes:

[0029] On the preset coordinate graph, the third coordinate point corresponding to different abnormal types is determined according to the different abnormal states;

[0030] Based on the first and third coordinate points, determine multiple second Euclidean distances; where each second Euclidean distance corresponds to a third coordinate point.

[0031] The target point is determined by identifying the third coordinate point corresponding to the minimum value among multiple second Euclidean distances; and the anomaly type corresponding to the target point is determined as the anomaly type of the circuit element under abnormal conditions.

[0032] Secondly, embodiments of this application provide a potential processing device for circuit elements in a secondary circuit, comprising:

[0033] The acquisition module is used to acquire the information matrix and initial state information of the circuit elements in the secondary circuit; wherein, the information matrix represents the connection relationship information and impedance information of the circuit elements in the secondary circuit;

[0034] The processing module is used to determine the node matrix of the nodes in the secondary loop based on the information matrix and the initial state information; wherein, the node matrix represents the node impedance of the corresponding node when the circuit element in the secondary loop is connected.

[0035] The processing module is also used to determine the current potential of the circuit elements in the secondary circuit based on the bus potential of the bus connected to the secondary circuit and the node matrix.

[0036] In one possible implementation, the node matrix of the nodes in the secondary loop is determined based on the information matrix and the initial state information. The processing module is used to:

[0037] Based on the connection relationship information in the information matrix, determine the nodes connected to each circuit element in the secondary loop;

[0038] Based on the initial state information and the impedance information in the information matrix, the node impedance of the corresponding node when the circuit element is connected is determined, and used as the value of the element at the corresponding position in the node matrix to obtain the node matrix.

[0039] In one possible implementation, the impedance information includes fixed impedance, combined impedance, and sectional impedance; the processing module is further configured to:

[0040] If the circuit element is a non-conversion type circuit element, then the impedance information of the circuit element is determined to be the fixed impedance corresponding to the circuit element.

[0041] If the circuit element is a conversion type circuit element, then when the initial state information of the circuit element indicates that it is in the closed state, the impedance information of the circuit element is determined to be the closed impedance of the circuit element; or when the initial state information of the circuit element indicates that it is in the open state, the impedance information of the circuit element is determined to be the open impedance of the circuit element.

[0042] In one possible implementation, the processing module is further configured to:

[0043] Determine the current of each circuit element based on its current potential in the secondary circuit.

[0044] Determine the current state information of the circuit element based on its current.

[0045] If the current state information is determined to be different from the initial state information of the circuit element, the node matrix is ​​updated according to the current state information; the updated node matrix is ​​used to calculate the updated current potential.

[0046] In one possible implementation, the processing module is further configured to:

[0047] Obtain the preset potentials of circuit elements in the secondary circuit under different operating states;

[0048] The current operating state of the circuit element is determined based on its current potential and the preset potential corresponding to different operating states.

[0049] In one possible implementation, different operating states include normal state and abnormal state;

[0050] Based on the current potential of the circuit element and the preset potential corresponding to different operating states, the current operating state of the circuit element is determined. The processing module is used to:

[0051] On the preset coordinate graph, the first coordinate point corresponding to the current potential of the circuit element is determined according to the current potential of the circuit element;

[0052] On the preset coordinate graph, the second coordinate point corresponding to the normal state is determined according to the preset potential corresponding to the normal state;

[0053] If the first Euclidean distance between the first coordinate point and the second coordinate point is less than or equal to a preset distance threshold, then the circuit element is determined to be in a normal operating state; otherwise, the circuit element is determined to be in an abnormal operating state.

[0054] In one possible implementation, the abnormal state includes at least one abnormal type; when it is determined that the operating state of the circuit element is abnormal, the processing module is further configured to:

[0055] On the preset coordinate graph, the third coordinate point corresponding to different abnormal types is determined according to the different abnormal states;

[0056] Based on the first and third coordinate points, determine multiple second Euclidean distances; where each second Euclidean distance corresponds to a third coordinate point.

[0057] The target point is determined by identifying the third coordinate point corresponding to the minimum value among multiple second Euclidean distances; and the anomaly type corresponding to the target point is determined as the anomaly type of the circuit element under abnormal conditions.

[0058] Thirdly, embodiments of this application provide an electronic device, including: a memory and a processor;

[0059] The memory stores the instructions that the computer executes;

[0060] The processor executes computer execution instructions stored in memory, causing the processor to perform the first aspect and / or various possible implementations of the first aspect as described above.

[0061] Fourthly, embodiments of this application provide a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, are used to implement the first aspect and / or various possible implementations of the first aspect.

[0062] Fifthly, embodiments of this application provide a computer program product, including a computer program that, when executed by a processor, implements the first aspect and / or various possible implementations of the first aspect.

[0063] The potential processing method, apparatus, and electronic device for circuit elements in a secondary circuit provided in this application can obtain an information matrix by using the connection relationship information, impedance information, and initial state information of the circuit elements in the secondary circuit, and further determine the node matrix. The current potential of the circuit elements in the secondary circuit is calculated by combining the voltage of the secondary circuit bus and the node matrix. Matrix modeling transforms the potential distribution problem of complex circuits into a mathematical operation problem. No manual analysis and calculation of the secondary circuit is required, solving the problems of low efficiency and poor accuracy in potential calculation in related technologies. This achieves the effect of improving the calculation efficiency and accuracy of the potential of circuit elements in a secondary circuit. Attached Figure Description

[0064] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0065] Figure 1 A flowchart illustrating the potential handling method for circuit elements in the secondary circuit provided in this application. Figure 1 ;

[0066] Figure 2 This is a schematic diagram of the secondary circuit of an exemplary substation protection device;

[0067] Figure 3 A flowchart illustrating the potential handling method for circuit elements in the secondary circuit provided in this application. Figure 2 ;

[0068] Figure 4 A flowchart illustrating the potential handling method for circuit elements in the secondary circuit provided in this application. Figure 3 ;

[0069] Figure 5 A flowchart illustrating the potential handling method for circuit elements in the secondary circuit provided in this application. Figure 4 ;

[0070] Figure 6 This is an example coordinate graph;

[0071] Figure 7 A schematic diagram of the potential processing device for circuit elements in the secondary circuit provided in this application;

[0072] Figure 8 A schematic diagram of the structure of the electronic device provided in this application.

[0073] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0074] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0075] First, let me explain the terms used in this application:

[0076] Secondary circuits refer to low-voltage circuit systems used for protection, control, and signal transmission in power systems. The potential distribution of circuit elements directly affects the operating state of the circuit elements.

[0077] Circuit elements refer to electrical equipment or components that constitute a secondary circuit, and their potential distribution needs to be analyzed through matrix modeling. For example, a circuit element in a secondary circuit can be a pressure plate. The pressure plate is the core control element in the secondary circuit. It can also be called a connecting piece or a protective pressure plate. Essentially, it is a manually operated switching device used to connect, disconnect, or switch signals in the secondary circuit, thereby achieving control and protection of the secondary circuit.

[0078] In power systems, the secondary circuits of substations are a crucial component for ensuring the safe operation of the power system. The secondary circuits control the operating logic of primary equipment through the on / off states of circuit components (such as pressure plates, relays, and switches).

[0079] Specifically, it can quickly disconnect the circuit when a fault occurs to prevent damage to electrical equipment in the power system.

[0080] The potential distribution of circuit components directly affects their operating status. For example, the potential of a pressure plate can reflect whether a protection function is activated. Taking a pressure plate as an example, in a secondary circuit, measuring and determining the pressure plate's potential to ground is a necessary step before activating the pressure plate. Potential information from the pressure plate can help identify potential problems in the secondary circuit and prevent operational accidents in the power system.

[0081] In some embodiments, the potential of the pressure plate needs to be measured and verified by an operator using a multimeter or a dedicated pressure plate potential measuring device. In manual potential calculation schemes, the secondary circuit must first be manually analyzed to obtain the standard potential of the pressure plate. However, due to differences in circuit structure and the state of circuit components within the secondary circuit, the standard potential of the pressure plate will also vary. This results in a large workload for manual analysis and low efficiency. Moreover, the measurement and calculation process of the pressure plate potential is cumbersome, and manual verification and calculation may be subject to subjective errors and misjudgments, leading to inaccurate potential calculations.

[0082] The potential processing method for circuit elements in a secondary circuit provided in this application obtains an information matrix by utilizing the connection relationship information, impedance information, and initial state information of the circuit elements in the secondary circuit, and further determines the node matrix. The current potential of the circuit elements in the secondary circuit is calculated by combining the voltage of the secondary circuit bus and the node matrix. Matrix modeling transforms the potential distribution problem of complex circuits into a mathematical calculation problem. This eliminates the need for manual analysis and calculation of the secondary circuit, solving the problems of low efficiency and poor accuracy in potential calculation in related technologies. It achieves the effect of improving the calculation efficiency and accuracy of the potential of circuit elements in a secondary circuit.

[0083] The technical solution of this application and how it solves the above-mentioned technical problems will be described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will be described below with reference to the accompanying drawings.

[0084] Figure 1 A flowchart illustrating the potential handling method for circuit elements in the secondary circuit provided in this application. Figure 1 ,like Figure 1 As shown, the method includes:

[0085] Step 101. Obtain the information matrix and initial state information of the circuit elements in the secondary loop.

[0086] The information matrix represents the connection relationship information and impedance information of the circuit elements in the secondary circuit.

[0087] For example, relevant information about the secondary circuit is entered. This information includes, but is not limited to: the number of nodes and components in the secondary circuit, the voltage of the positive and negative terminals of the control bus, the information matrix of the circuit components, and the initial state vector of the circuit components. It can be understood that the initial state vector of the circuit components is the initial state information.

[0088] The information matrix can represent various information about each circuit element in the secondary loop, including connection relationship information and impedance information. The connection relationship information describes the topological connections of the circuit elements in the secondary loop.

[0089] Impedance information is used to describe the impedance value of a circuit element in different open / closed states. Initial state information is the open / closed state of the circuit element at the initial moment, represented by the initial state vector, and is used to determine the impedance value of the circuit element in the initial state.

[0090] Specifically, circuit components can include: relays, coils, contacts, current-limiting resistors, indicator lights, pressure plates, etc. Taking a relay as an example, different open / closed states of a relay correspond to different impedance values. For instance, if the initial state of the relay is determined to be an open / closed state based on the initial state information, then the impedance value (i.e., impedance information) of the relay in the initial state is the value corresponding to the open / closed impedance.

[0091] For example, an information matrix can be denoted as... The information matrix is Matrix. Number of rows in the information matrix. The information matrix, representing the number of circuit elements in the secondary circuit, has seven columns corresponding to: circuit element number, first and last node number, closing impedance, opening impedance, contact-related element number, and normally open / normally closed flag. The first and last node numbers indicate the connection relationships between the circuit elements in the secondary circuit. The closing and opening impedances indicate the impedance information of each circuit element in the secondary circuit.

[0092] Specifically, in the information matrix, the contact-associated element number for non-contact circuit elements is set to 0. For example, the normally open / normally closed flag in the information matrix can be 0 for normally open contacts and 1 for normally closed contacts.

[0093] Figure 2 This is a schematic diagram of the secondary circuit of an exemplary substation protection device. Figure 2 As shown, Figure 2 In the diagram, +KM represents the positive terminal of the control power supply, and -KM represents the negative terminal. HWJ represents the closing relay, used to monitor the circuit breaker's closing position. STJ-1 is the contact for manual tripping, and it is a normally open contact. TJ-1 is the contact for protection tripping, and it is a normally open contact. HWJ-1 represents the contact of the closing relay, and it is a normally open contact; the associated component is HWJ. DL is the circuit breaker auxiliary contact, and it is a normally closed contact. TQ is the trip coil, R1 and R2 are current-limiting resistors, HD is an indicator light, and LP is the pressure plate for enabling / disabling the protection tripping function. It can be understood that... Figure 2 The secondary circuit shown has 12 circuit elements and 10 nodes. The 10 nodes are located in... Figure 2 The numbers are shown as N1 to N10 respectively.

[0094] Combination Figure 2 To illustrate, for components without open / closed state transitions, i.e., non-transition circuit components, taking the HWJ closed relay as an example, the corresponding row in its information matrix can be represented as follows:

[0095] ;

[0096] In the rows of this matrix, the first digit indicates that the component number of the closing relay HWJ is 2. The second digit indicates that the first terminal node of the closing relay HWJ is N2, and the third digit indicates that the last terminal node of the closing relay HWJ is N3. Since this circuit component does not involve the switching between closing and opening states, the closing impedance and the opening impedance in the fourth and fifth digits of the matrix remain the same value, i.e. Since this circuit element is a non-contact element, the sixth bit in the row of this matrix is ​​0, indicating that the open / closed state of the closing relay HWJ is independent of other elements. The seventh bit indicates that the closing relay HWJ is normally closed.

[0097] Combination Figure 2 To illustrate, for components that undergo state transitions, i.e., switching circuit components, taking auxiliary contact HWJ-1 as an example, the corresponding row in its information matrix can be represented as follows:

[0098] ;

[0099] In the rows of this matrix, the first digit indicates that the component number of auxiliary contact HWJ-1 is 7. The second digit indicates that the first terminal node of auxiliary contact HWJ-1 is N2. The third digit indicates that the last terminal node of auxiliary contact HWJ-1 is N6. The fourth digit indicates the closing impedance of auxiliary contact HWJ-1. The fifth digit indicates the gradient impedance of the auxiliary contact HWJ-1. The sixth bit being 2 indicates that the open / closed state of the auxiliary contact HWJ-1 is related to the circuit element with component number 2, namely the aforementioned closed relay HWJ. The seventh bit indicates that the auxiliary contact HWJ-1 is normally open.

[0100] The initial state vector can be denoted as ,for A vector. In this vector, each element represents a circuit element in a split state (0) and a circuit element in a combined state (1).

[0101] Step 102. Determine the node matrix of the nodes in the quadratic loop based on the information matrix and the initial state information.

[0102] The node matrix represents the node impedance of the circuit elements in the secondary loop when they are connected.

[0103] For example, based on the connection relationship information and impedance information of the circuit elements represented in the information matrix, combined with the initial state information, the impedance information of the circuit elements is converted into the node impedance of the corresponding node of the circuit element at the connection point.

[0104] For example, for a resistor, the resistance value represented by its impedance information can be directly substituted into the node matrix. However, for a relay, it is necessary to combine its initial state information to select the corresponding combined or separated impedance and substitute it into the node matrix.

[0105] Step 103. Determine the current potential of the circuit elements in the secondary circuit based on the bus potential of the bus connected to the secondary circuit and the node matrix.

[0106] For example, by combining the bus potential of the busbar connected to the node matrix and the secondary loop, the potential of each circuit element is calculated through matrix operations. The bus potential includes a first voltage and a second voltage, combined with... Figure 2 The secondary circuit shown is explained below. The first voltage is the voltage value of the positive terminal (+KM) of the control power supply, and the second voltage is the voltage value of the negative terminal (-KM) of the control power supply.

[0107] Specifically, Kirchhoff's laws can be used to construct nodal equations based on the nodal impedances of each node as represented by the nodal matrix. In the nodal equations, Kirchhoff's laws are used to express the relationships between the nodal impedances of different nodes, the current vector injected into the nodes, and the nodal potential vector.

[0108] For example, the nodal equations can be expressed as:

[0109] ;

[0110] In the above nodal equations, and These are the current vector injected into the node and the node potential vector, respectively. Both vectors are... The vector. Since the potentials of the two nodes at the positive and negative poles of the control bus in the secondary loop are known, the injected current is unknown, while the potentials of the other intermediate nodes are unknown, and the injected current is 0. Therefore, the node current injection equation can be eliminated. The two lines corresponding to the positive and negative poles of the control bus are supplemented with two additional equations specifying the potentials of the positive and negative poles of the control bus, which remain the same. A system of linear equations consisting of several equations can be used to quickly obtain the node potentials by finding the inverse matrix.

[0111] Combination Figure 2 To illustrate, the external injected current of the eight intermediate nodes N2-N9 is 0, while the injected current of N1 and N10 is unknown. Therefore, the relationship between node current and node voltage can be expressed by eight equations, which can be represented by the following formula:

[0112] ;

[0113] The above formula can be understood as eliminating the rows corresponding to nodes N1 and N10, and adding the two given conditions for the potentials of N1 and N10, resulting in the following two equations:

[0114] ;

[0115] in, This indicates the voltage value of the control power supply (+KM), i.e., the first voltage; This indicates the voltage value at the negative terminal (-KM) of the control power supply, i.e., the second voltage. These represent the potentials corresponding to node numbers 1 to 10 in the secondary circuit.

[0116] Furthermore, by combining the above equations into a system of equations, it can be expressed as follows: In the form of, Since it is a square matrix, it can be solved directly by finding the inverse matrix. .

[0117] The potential processing method for circuit elements in a secondary circuit provided in this application constructs an information matrix and obtains the initial state information of the circuit elements. It replaces the inefficiency and error-proneness of traditional manual modeling by structurally storing the connection relationships and impedance information of the circuit elements. A node matrix is ​​generated, and based on the connection relationships and impedance information in the information matrix, mathematical operations are used to map the impedance characteristics of the circuit elements to the equivalent impedance values ​​between nodes. Potential calculation is then performed, combining the node matrix and the bus voltage, and solving for the potential distribution of each node through matrix operations. Through matrix modeling and automated calculation, efficient and accurate analysis of the potential distribution of circuit elements in a secondary circuit is achieved, improving the calculation efficiency and accuracy of the potential of circuit elements in a secondary circuit, and providing reliable data support for the state monitoring and anomaly detection of circuit elements.

[0118] Figure 3 A flowchart illustrating the potential handling method for circuit elements in the secondary circuit provided in this application. Figure 2 ,like Figure 3 As shown, in this embodiment... Figure 1 Based on the illustrated embodiment, the process of determining the node matrix in step 102 above will be described in detail. The method includes:

[0119] Step 301. Based on the connection relationship information in the information matrix, determine the nodes connected to each circuit element in the secondary loop.

[0120] Step 302. Based on the initial state information and the impedance information in the information matrix, determine the node impedance of the corresponding node when the circuit element is connected, and use it as the value of the element at the corresponding position in the node matrix to obtain the node matrix.

[0121] For example, in combination Figure 2 To illustrate, Figure 2 The quadratic loop shown contains 10 nodes. Therefore, the node matrix is ​​a 10×10 matrix. During initialization, this node matrix is ​​an all-zero matrix. The start and end node numbers of each circuit element in the quadratic loop, as well as the impedance value of each circuit element, are obtained and substituted into the node matrix to determine the values ​​of elements at different positions within the node matrix.

[0122] For example, the node matrix can be denoted as... The impedance value of a circuit element is denoted as The starting node number of each circuit element is denoted as . The end node number is denoted as The value of each element in the node matrix can be calculated using the following formulas:

[0123] ;

[0124] In the four formulas above, the first and last node numbers of each circuit element determine the four elements corresponding to that circuit element in the node matrix. Initially, these elements have a value of 0. Based on the impedance information and initial state information of the circuit element, the values ​​used for calculation can be determined. Based on the four formulas mentioned above, the values ​​of the elements at the four positions corresponding to the circuit element in the node matrix are updated respectively. This process is repeated until the calculation for each circuit element in the secondary loop is completed, thereby obtaining the node matrix of the secondary loop.

[0125] In the above embodiments, accurate modeling of the node matrix is ​​achieved by refining the mapping logic between initial state information and impedance information. Specifically, by directly associating the connection nodes of circuit elements with impedance values, calculation errors caused by omissions in connection relationships or impedance parameters during manual modeling are avoided. Furthermore, by standardizing the processing of impedance and initial state information of circuit elements, the generation process of the node matrix is ​​ensured to be standardized, improving the accuracy and efficiency of potential analysis of circuit elements.

[0126] As can be seen from the foregoing embodiments, in the information matrix, the impedance information of each circuit element can vary depending on the type of circuit element. Specifically, for non-conversion circuit elements, their impedance is usually a fixed impedance with a fixed value; for conversion circuit elements, their impedance needs to be changed according to the open / closed state indicated by their initial state information.

[0127] Based on the foregoing embodiments, in one example, the impedance information includes fixed impedance, combined impedance, and sectional impedance.

[0128] Based on this, the method also includes:

[0129] If the circuit element is a non-conversion type circuit element, then the impedance information of the circuit element is determined to be the fixed impedance corresponding to the circuit element.

[0130] If the circuit element is a conversion type circuit element, then when the initial state information of the circuit element indicates that it is in the closed state, the impedance information of the circuit element is determined to be the closed impedance of the circuit element; or when the initial state information of the circuit element indicates that it is in the open state, the impedance information of the circuit element is determined to be the open impedance of the circuit element.

[0131] For example, as can be seen from the foregoing examples, in Figure 2 In the secondary circuit shown, the closing relay is a non-converting circuit element, and its impedance information is a fixed impedance, i.e. The auxiliary contact is a switching circuit element, and its impedance information needs to be determined based on its initial state. The impedance information in the closed state is the closed impedance. The impedance information in the quantile state is the quantile impedance. .

[0132] Specifically, the initial state is determined based on the initial state vector. In the initial state vector, the value of each element corresponds to the initial state of each circuit element in the secondary loop.

[0133] For example, the impedance information of auxiliary contact HWJ-1 can be expressed by the following formula:

[0134] ;

[0135] In the above formula, This indicates the impedance of auxiliary contact HWJ-1; This indicates the value of the element in the initial state vector corresponding to the circuit element HWJ, the closing relay HWJ, which is associated with the auxiliary contact HWJ-1. , These represent the closing impedance and opening impedance of auxiliary contact HWJ-1 in the closed and open states, respectively.

[0136] In the above example, considering the diverse types of circuit elements in the secondary loop, and associating different impedance information according to the type of circuit element and initial state information, a more accurate node matrix can be obtained, thereby making the potential calculation of the circuit elements in the secondary loop more accurate.

[0137] Figure 4 A flowchart illustrating the potential handling method for circuit elements in the secondary circuit provided in this application. Figure 3 Based on the foregoing embodiments, such as Figure 4 As shown, the method also includes:

[0138] Step 401. Determine the current of each circuit element based on its current potential in the secondary circuit.

[0139] For example, in combination Figure 2 The secondary circuit shown is explained below. Taking the closing relay HWJ as an example, the current of the closing relay HWJ can be calculated using the following formula:

[0140] ;

[0141] in, This indicates the current of the closed relay. This indicates the impedance information of the closing relay, i.e., the fixed impedance of the closing relay; and These are the current potentials of the first and last nodes of the closed relay, respectively.

[0142] Step 402. Determine the current state information of the circuit element based on the current of the circuit element.

[0143] For example, the initial state of the closed relay in the initial state vector is updated based on the current of the closed relay calculated in step 401.

[0144] Specifically, the current state information of the closing relay HWJ is the updated value of the flag bit corresponding to HWJ in the original initial state vector, which can be expressed by the following formula:

[0145] ;

[0146] in, This represents the updated value of the corresponding element in the initial state vector for the closed position relay HWJ, i.e., the current state information. For threshold current, This represents the current of the closing relay. The calculated current of the closing relay is compared with a preset threshold current, and the values ​​of the elements corresponding to the closing relay in the original initial state vector are updated.

[0147] Step 403. If it is determined that the current state information is different from the initial state information of the circuit element, then update the node matrix according to the current state information; the updated node matrix is ​​used to calculate the updated current potential.

[0148] For example, if the updated value of the element corresponding to the closed position relay HWJ in the initial state vector is different from the value in the original initial state vector, it indicates that the current state information is different from the initial state information of the circuit element.

[0149] The updated values ​​replace the original values ​​in the initial vector, thus updating the node matrix. Specifically, since the closed / open state of auxiliary contact HWJ-1 is affected by the state of the closed relay HWJ, it can be achieved by... The impedance information corresponding to auxiliary contact HWJ-1 in the node matrix was recalculated.

[0150] Furthermore, in the updated node matrix, based on the recalculated impedance information corresponding to auxiliary contact HWJ-1, the updated current potential of node HWJ-1 can be recalculated, i.e., the updated potentials of nodes N2 and N6. and Specifically, the nodal equations can be resolved to obtain the updated current potential.

[0151] Optionally, if the current state information is the same as the initial state information, the potential of the circuit element calculated earlier can be used directly for output.

[0152] In the above embodiments, the accuracy of the final potential calculation result of the circuit element is ensured by responding to the state changes of the circuit element in real time. Furthermore, the initial state information of the circuit element undergoing a state change (either open or closed) can be replaced with the current state information (i.e., the updated current state of the circuit element) in the node matrix. Through a local update strategy, the impedance information of the circuit element substituted into the node matrix operation can be updated, thereby changing the potential calculation result. This reduces redundant calculations in matrix operations, thereby improving processing efficiency and adapting to the real-time requirements of dynamic scenarios.

[0153] In some embodiments, taking a pressure plate as a circuit element in a secondary circuit as an example, the potential calculation result of the pressure plate is used to determine whether it conforms to the standard potential. If the potential calculation result of the pressure plate does not conform to the standard potential, further manual deduction of the problem or fault cause in the secondary circuit is required. Further fault diagnosis requires a high level of technical expertise from the operators and involves a significant workload.

[0154] Based on any of the above embodiments, automated judgment can be made by calculating the current potential of the circuit element.

[0155] Figure 5 A flowchart illustrating the potential handling method for circuit elements in the secondary circuit provided in this application. Figure 4 .like Figure 5 As shown, the method also includes:

[0156] Step 501. Obtain the preset potentials of the circuit elements in the secondary circuit under different operating states.

[0157] For example, a circuit element has a corresponding preset potential in different operating states. The preset potential includes the upper potential and lower potential of the circuit element in that operating state, which respectively correspond to the potential of the circuit element at the first node and the potential of the last node mentioned in the foregoing embodiments.

[0158] It should be noted that the preset potentials corresponding to circuit elements in different operating states can be pre-calibrated experimentally and stored.

[0159] Step 502. Determine the current operating state of the circuit element based on its current potential and the preset potential corresponding to different operating states.

[0160] For example, the current potential of the circuit element calculated in conjunction with the foregoing embodiments, including the potential of the first node and the potential of the last node of the circuit element, is compared with the preset potential of different preset operating states to determine the current operating state of the circuit element.

[0161] Specifically, in one example, the different working states include normal and abnormal states.

[0162] For example, a normal state refers to the circuit elements in the secondary circuit being in a normal working state, while an abnormal state refers to the circuit elements in the secondary circuit being in an abnormal working state.

[0163] Based on this, step 502 determines the current operating state using a two-dimensional planar diagram. Step 502, determining the current operating state of the circuit element, can specifically include:

[0164] Step 5021. On the preset coordinate diagram, determine the first coordinate point corresponding to the current potential of the circuit element based on the current potential of the circuit element.

[0165] For example, the preset coordinate graph refers to a Cartesian coordinate system with the upper potential of the circuit element as the horizontal axis and the lower potential as the vertical axis. Determining the first coordinate point corresponding to the circuit element based on its current potential means taking the potential of the first node in the current potential as the horizontal axis and the position of the last node as the vertical axis to obtain the first coordinate point.

[0166] For example, the calculated potential of the first end node of the pressure plate is denoted as... The potential of the terminal node is denoted as Then the coordinates of the first coordinate point can be expressed as ( , ).

[0167] Step 5022. On the preset coordinate graph, determine the second coordinate point corresponding to the normal state based on the preset potential corresponding to the normal state.

[0168] For example, similar to the steps described above, the preset potential corresponding to the normal state also includes an upper potential and a lower potential, which can be used as the horizontal and vertical coordinates to obtain the second coordinate point corresponding to the normal state.

[0169] For example, the second coordinate point in the normal state can be represented as ( , ),in, This is the upper potential corresponding to the normal state. This represents the lower potential corresponding to the normal state.

[0170] Step 5023. If the first Euclidean distance between the first coordinate point and the second coordinate point is less than or equal to a preset distance threshold, then the working state of the circuit element is determined to be normal; otherwise, the working state of the circuit element is determined to be abnormal.

[0171] For example, the first Euclidean distance is obtained by calculating the Euclidean distance based on the coordinate values ​​of the first and second coordinate points. See the following formula for details:

[0172] ;

[0173] If the first Euclidean distance is determined If the value is less than or equal to a preset distance threshold, then the current operating state of the circuit element is determined to be normal. Taking the pressure plate as an example, in Under these conditions, the platen potential is normal and it can be connected. The preset distance threshold, i.e. the allowable deviation, can be set to 2V.

[0174] Conversely, if the first Euclidean distance If the value is greater than a preset distance threshold, the current operating state of the circuit element is determined to be abnormal, and further determination of the abnormality type is required. Please refer to the explanation below for details.

[0175] Figure 6 This is an example coordinate graph. (e.g.) Figure 6 As shown, the measured value can be calculated through the aforementioned embodiments, and the current potential corresponding to the measured value can be determined as the first coordinate point, which is then plotted on a preset coordinate graph. Figure 6 The square coordinate points corresponding to measurement values ​​1 and 2 in the diagram.

[0176] like Figure 6 As shown, in the preset coordinate graph, the preset potential corresponding to the normal state is determined as the second coordinate point, and then plotted on the preset coordinate graph. For example... Figure 6The star-shaped coordinates corresponding to the normal state are shown in the diagram. In practical applications, taking the pressure plate as an example, its upper potential in the normal state is -107.8973V, and its lower potential in the normal state is 0.0020V.

[0177] Furthermore, the abnormal state includes at least one abnormal type. For example, abnormal types may include: TJ-1 contact sticking, DL disconnection, poor DL ​​contact leading to increased resistance, and trip coil TQ disconnection. Each abnormal type has a corresponding preset potential, including a corresponding upper potential and a lower potential.

[0178] Based on this, if step 5023 determines that the operating state of the circuit element is abnormal, the method further includes:

[0179] On the preset coordinate graph, the third coordinate point corresponding to different abnormality types is determined according to the different abnormality types of the abnormal state.

[0180] For example, based on the preset potentials corresponding to different abnormality types, the third coordinate point corresponding to each abnormality type is determined. For instance, the third coordinate point can be represented as ( , ),in, This represents the upper potential corresponding to the j-th abnormal type under abnormal conditions. This represents the lower potential corresponding to the j-th abnormality type under abnormal conditions.

[0181] Continue to combine Figure 6 Provide an explanation. Figure 6 The system includes four types of abnormal states: Abnormal State 1, Abnormal State 2, Abnormal State 3, and Abnormal State 4. Abnormal State 1 indicates that the TJ-1 contact is stuck; Abnormal State 2 indicates that the DL is open; Abnormal State 3 indicates that the DL has poor contact and increased resistance; and Abnormal State 4 indicates that the trip coil TQ is open.

[0182] The third coordinate point corresponding to abnormal state 1 is as follows Figure 6 The coordinates of the upper triangle in the diagram are shown. The third coordinate point corresponding to anomaly state 2 is shown in the diagram. Figure 6 The circular coordinate points are shown in the diagram. The third coordinate point corresponding to anomaly state 3 is shown in the diagram. Figure 6 The coordinates of the lower triangle in the diagram are shown. The third coordinate point corresponding to anomaly state 4 is shown in the diagram. Figure 6 The coordinates of the rhombus are shown in the diagram. It should be noted that... Figure 6 Due to the scale, the third coordinate points corresponding to anomalies 2 and 4 are relatively close to each other. This can be adjusted by correcting the scale. In practical applications, the coordinate values ​​of their corresponding third coordinate points are different.

[0183] Specifically, the upper potential of anomaly state 1 is -107.8973V and the lower potential is 109.9181V. The upper potential of anomaly state 2 is 109.9338V and the lower potential is 0.2195V. The upper potential of anomaly state 3 is -74.6750V and the lower potential is 0.0352V. The upper potential of anomaly state 4 is 109.8734V and the lower potential is 0.2194V.

[0184] Based on the first and third coordinate points, multiple second Euclidean distances are determined. These second Euclidean distances correspond to the third coordinate point.

[0185] The target point is determined by identifying the third coordinate point corresponding to the minimum value among multiple second Euclidean distances; and the anomaly type corresponding to the target point is determined as the anomaly type of the circuit element under abnormal conditions.

[0186] For example, based on the first coordinate point and multiple third coordinate points corresponding to different anomaly types, the second Euclidean distance corresponding to each third coordinate point is calculated. Specifically, it can be calculated using the following formula:

[0187] ;

[0188] Take one of them The third coordinate point corresponding to the minimum value is the target point. The anomaly type corresponding to this target point is taken as the anomaly type of the circuit element, which can help infer the possible causes of failures in the secondary circuit and provide a reference for maintenance personnel to troubleshoot.

[0189] Combination Figure 6 For example, if the distance between measured value 1 and the normal state is less than the allowable deviation, the pressure plate potential can be determined to be normal. If the distance between measured value 2 and the normal state is greater than the allowable deviation, and the distance between measured value 2 and abnormal state 1 is minimal, it can be determined that the TJ-1 contact is stuck in the secondary circuit, and maintenance personnel can further investigate.

[0190] In the above embodiments, by introducing a preset potential corresponding to the normal state and combining it with the current potential of the circuit element calculated above, the automatic identification of whether the circuit element is in a normal operating state can be achieved. This provides a fundamental guarantee for the normal and stable operation of the power system.

[0191] Furthermore, the Euclidean distance algorithm enables quantitative analysis of normal and abnormal states, thereby improving the accuracy and reliability of identifying normal and abnormal states of circuit components.

[0192] Furthermore, the Euclidean distance algorithm enables precise identification of anomaly types under abnormal conditions. Mathematical analysis avoids the subjectivity of human experience-based judgment, improves the accuracy of anomaly type identification for circuit components, and provides more comprehensive decision support for fault early warning and diagnosis in power systems.

[0193] The potential processing method for circuit elements in a secondary circuit provided in this application constructs an information matrix. This matrix stores the connection relationships, impedance, and initial state information of the circuit elements in a structured manner, replacing the inefficiency and error-proneness of traditional manual modeling. A node matrix is ​​generated. Based on the connection relationships and impedance information in the information matrix, mathematical operations are used to map the impedance characteristics of the circuit elements to the equivalent impedance values ​​between nodes. Potential calculation is then performed. Combining the node matrix and the bus voltage, matrix operations are used to solve for the potential distribution of each node. Through matrix modeling and automated calculation, efficient and accurate analysis of the potential distribution of circuit elements in a secondary circuit is achieved, improving the calculation efficiency and accuracy of the potential of circuit elements in a secondary circuit, and providing reliable data support for the state monitoring and anomaly detection of circuit elements.

[0194] By directly associating the connection nodes of circuit elements with their impedance values, calculation errors caused by omissions in connection relationships or impedance parameters during manual modeling are avoided. By standardizing the processing of impedance and initial state information of circuit elements, the accuracy and efficiency of potential analysis of circuit elements are improved.

[0195] By responding to real-time changes in the state of circuit elements, the accuracy of the final potential calculation results for the circuit elements is ensured. A local update strategy allows for updating the impedance information of the circuit element used in node matrix operations, reducing redundant calculations and thus improving processing efficiency.

[0196] By introducing a preset potential corresponding to the normal state and combining it with the current potential of the circuit element calculated above, the automatic identification of whether the circuit element is in a normal operating state can be achieved. The Euclidean distance algorithm enables quantitative analysis of the judgment between normal and abnormal states, and precise location of the anomaly type under abnormal states. This improves the accuracy and reliability of identifying the normal and abnormal states of circuit elements, and enhances the accuracy of judging the anomaly type of circuit elements.

[0197] Figure 7 This is a schematic diagram of the potential processing device for circuit elements in the secondary circuit provided in this application, as shown below. Figure 7 As shown, the potential processing device 70 for circuit elements in the secondary circuit provided in this embodiment includes:

[0198] The acquisition module 701 is used to acquire the information matrix and initial state information of the circuit elements in the secondary circuit; wherein, the information matrix represents the connection relationship information and impedance information of the circuit elements in the secondary circuit;

[0199] The processing module 702 is used to determine the node matrix of the nodes in the secondary loop based on the information matrix and the initial state information; wherein, the node matrix represents the node impedance of the corresponding node when the circuit element in the secondary loop is connected.

[0200] The processing module 702 is also used to determine the current potential of the circuit elements in the secondary circuit based on the bus potential of the bus connected to the secondary circuit and the node matrix.

[0201] In one possible implementation, the node matrix of the nodes in the secondary loop is determined based on the information matrix and the initial state information. The processing module 702 is used for:

[0202] Based on the connection relationship information in the information matrix, determine the nodes connected to each circuit element in the secondary loop;

[0203] Based on the initial state information and the impedance information in the information matrix, the node impedance of the corresponding node when the circuit element is connected is determined, and used as the value of the element at the corresponding position in the node matrix to obtain the node matrix.

[0204] In one possible implementation, the impedance information includes fixed impedance, combined impedance, and sectional impedance; the processing module 702 is further configured to:

[0205] If the circuit element is a non-conversion type circuit element, then the impedance information of the circuit element is determined to be the fixed impedance corresponding to the circuit element.

[0206] If the circuit element is a conversion type circuit element, then when the initial state information of the circuit element indicates that it is in the closed state, the impedance information of the circuit element is determined to be the closed impedance of the circuit element; or when the initial state information of the circuit element indicates that it is in the open state, the impedance information of the circuit element is determined to be the open impedance of the circuit element.

[0207] In one possible implementation, the processing module 702 is further configured to:

[0208] Determine the current of each circuit element based on its current potential in the secondary circuit.

[0209] Determine the current state information of the circuit element based on its current.

[0210] If the current state information is determined to be different from the initial state information of the circuit element, the node matrix is ​​updated according to the current state information; the updated node matrix is ​​used to calculate the updated current potential.

[0211] In one possible implementation, the processing module 702 is further configured to:

[0212] Obtain the preset potentials of circuit elements in the secondary circuit under different operating states;

[0213] The current operating state of the circuit element is determined based on its current potential and the preset potential corresponding to different operating states.

[0214] In one possible implementation, different operating states include normal state and abnormal state;

[0215] Based on the current potential of the circuit element and the preset potential corresponding to different operating states, the current operating state of the circuit element is determined. The processing module 702 is used to:

[0216] On the preset coordinate graph, the first coordinate point corresponding to the current potential of the circuit element is determined according to the current potential of the circuit element;

[0217] On the preset coordinate graph, the second coordinate point corresponding to the normal state is determined according to the preset potential corresponding to the normal state;

[0218] If the first Euclidean distance between the first coordinate point and the second coordinate point is less than or equal to a preset distance threshold, then the circuit element is determined to be in a normal operating state; otherwise, the circuit element is determined to be in an abnormal operating state.

[0219] In one possible implementation, the abnormal state includes at least one abnormal type; when it is determined that the operating state of the circuit element is abnormal, the processing module 702 is further configured to:

[0220] On the preset coordinate graph, the third coordinate point corresponding to different abnormal types is determined according to the different abnormal states;

[0221] Based on the first and third coordinate points, determine multiple second Euclidean distances; where each second Euclidean distance corresponds to a third coordinate point.

[0222] The target point is determined by identifying the third coordinate point corresponding to the minimum value among multiple second Euclidean distances; and the anomaly type corresponding to the target point is determined as the anomaly type of the circuit element under abnormal conditions.

[0223] The potential processing device for circuit elements in the secondary circuit provided in this embodiment can execute the method provided in the above method embodiment. Its implementation principle and technical effect are similar, and will not be described in detail here.

[0224] Figure 8 A schematic diagram of the structure of the electronic device provided in this application. Figure 8 As shown, the electronic device 80 provided in this embodiment includes at least one processor 801 and a memory 802. Optionally, the electronic device 80 further includes a communication component 803. The processor 801, memory 802, and communication component 803 are connected via a bus 804.

[0225] In a specific implementation, at least one processor 801 executes computer execution instructions stored in memory 802, causing at least one processor 801 to perform the above-described method.

[0226] The specific implementation process of processor 801 can be found in the above method embodiments, and its implementation principle and technical effect are similar. It will not be repeated here.

[0227] In the above embodiments, it should be understood that the processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), etc. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in this invention can be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules within the processor.

[0228] The memory may include random access memory (RAM) and may also include non-volatile memory (NVM), such as at least one disk storage device.

[0229] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of illustration, the buses shown in the accompanying drawings are not limited to a single bus or a single type of bus.

[0230] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the above-described method.

[0231] This application also provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, implement the above-described method.

[0232] The aforementioned readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The readable storage medium can be any available medium accessible to a general-purpose or special-purpose computer.

[0233] An exemplary readable storage medium is coupled to a processor, enabling the processor to read information from and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can reside in an Application Specific Integrated Circuit (ASIC). Alternatively, the processor and the readable storage medium can exist as discrete components in the device.

[0234] The division of units is merely a logical functional division; in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, devices, or units, and may be electrical, mechanical, or other forms.

[0235] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0236] In addition, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0237] If a function is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0238] Those skilled in the art will understand that all or part of the steps of the above-described method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments; and the aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

[0239] Finally, it should be noted that other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A method for handling the potential of circuit elements in a secondary circuit, characterized in that, include: Obtain the information matrix and initial state information of the circuit elements in the secondary circuit; wherein, the information matrix represents the connection relationship information and impedance information of the circuit elements in the secondary circuit; Based on the information matrix and the initial state information, the node matrix of the nodes in the secondary loop is determined; wherein, the node matrix represents the node impedance of the node corresponding to the circuit element in the secondary loop when it is connected. The current potential of the circuit elements in the secondary circuit is determined based on the bus potential of the bus connected to the secondary circuit and the node matrix.

2. The method according to claim 1, characterized in that, Based on the information matrix and the initial state information, the node matrix of the nodes in the secondary loop is determined, including: Based on the connection relationship information in the information matrix, determine the nodes connected to each circuit element in the secondary loop; Based on the initial state information and the impedance information in the information matrix, the node impedance of the corresponding node when the circuit element is connected is determined, and used as the value of the element at the corresponding position in the node matrix to obtain the node matrix.

3. The method according to claim 2, characterized in that, The impedance information includes fixed impedance, combined impedance, and sectional impedance; the method further includes: If the circuit element is a non-conversion type circuit element, then the impedance information of the circuit element is determined to be the fixed impedance corresponding to the circuit element; If the circuit element is a conversion type circuit element, then when the initial state information of the circuit element indicates a closed state, the impedance information of the circuit element is determined to be the closed impedance corresponding to the circuit element; or when the initial state information of the circuit element indicates a separated state, the impedance information of the circuit element is determined to be the separated impedance corresponding to the circuit element.

4. The method according to claim 1, characterized in that, The method further includes: Based on the current potential of the circuit elements in the secondary circuit, determine the current of each circuit element; The current state information of the circuit element is determined based on the current of the circuit element. If it is determined that the current state information is different from the initial state information of the circuit element, the node matrix is ​​updated according to the current state information; the updated node matrix is ​​used to calculate the updated current potential.

5. The method according to any one of claims 1-4, characterized in that, The method further includes: Obtain the preset potentials of circuit elements in the secondary circuit under different operating states; The current operating state of the circuit element is determined based on its current potential and the preset potential corresponding to different operating states.

6. The method according to claim 5, characterized in that, The different working states include normal state and abnormal state; Determining the current operating state of the circuit element based on its current potential and the preset potentials corresponding to different operating states includes: On a preset coordinate graph, the first coordinate point corresponding to the current potential of the circuit element is determined based on the current potential of the circuit element. On the preset coordinate graph, the second coordinate point corresponding to the normal state is determined according to the preset potential corresponding to the normal state; If the first Euclidean distance between the first coordinate point and the second coordinate point is less than or equal to a preset distance threshold, then the circuit element is determined to be in a normal operating state; otherwise, the circuit element is determined to be in an abnormal operating state.

7. The method according to claim 6, characterized in that, The abnormal state includes at least one abnormal type; when the operating state of the circuit element is determined to be abnormal, the method further includes: On the preset coordinate graph, the third coordinate point corresponding to different abnormality types is determined according to the different abnormality types of the abnormal state; Based on the first coordinate point and the third coordinate point, a plurality of second Euclidean distances are determined respectively; wherein, the second Euclidean distance corresponds to the third coordinate point; The third coordinate point corresponding to the minimum value among the plurality of second Euclidean distances is determined as the target point; and the anomaly type corresponding to the target point is determined as the anomaly type of the circuit element under the abnormal state.

8. A potential processing device for circuit elements in a secondary circuit, characterized in that, include: The acquisition module is used to acquire the information matrix and initial state information of the circuit elements in the secondary circuit; wherein, the information matrix represents the connection relationship information and impedance information of the circuit elements in the secondary circuit; The processing module is used to determine the node matrix of the nodes in the secondary loop based on the information matrix and the initial state information; wherein the node matrix represents the node impedance of the node corresponding to the circuit element in the secondary loop when it is connected. The processing module is further configured to determine the current potential of the circuit elements in the secondary circuit based on the bus potential of the bus connected to the secondary circuit and the node matrix.

9. An electronic device, characterized in that, include: Memory, processor; The memory stores computer-executed instructions; The processor executes computer execution instructions stored in the memory, causing the processor to perform the method as described in any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, which, when executed by a processor, are used to implement the method as described in any one of claims 1-7.

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