Power distribution system monitoring diagram design method in Web list form

Abstract

The invention discloses a Web list form power distribution system monitoring diagram design method, which relates to the technical field of electric power automation, and comprises the following steps: summarizing the general characteristics of a high and low voltage power transformation and distribution system, automatically calling corresponding table cells in an adaptive manner according to the logic relationship among electrical elements, loading electrical graphic elements, obtaining a monitoring diagram layout, and obtaining a monitoring diagram layout; correct display of the electrical symbols is ensured; real-time data updating is achieved through the Web front-end technology, and it is ensured that a monitoring graph and background database information are synchronized; dynamically acquiring electrical parameters, reflecting the electrical parameters on a monitoring graph in real time, and performing early warning and fault positioning marking when data is abnormal; on-line design and management efficiency of an electrical system diagram in a power transformation and distribution monitoring system is improved, direct presentation and efficient control of electrical element configuration, line monitoring and system states are achieved through table layout optimization in a webpage environment, the limitation that layout is rigid and interaction is inconvenient in the prior art can be overcome, and the method is suitable for popularization and application. And design efficiency and modernization of system management are promoted.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power automation, and more specifically to a method for designing a monitoring diagram of a power distribution system in the form of a Web list. Background Art

[0002] With the development of smart grids, power distribution monitoring systems need to cope with the increasing amount of data and real-time monitoring needs. Traditional design methods face challenges in adapting to the trend of networking and intelligence.

[0003] Although there are a variety of electrical CAD software on the market that support system diagram design, the traditional electrical system diagram design method requires system software designers to master a fairly high level of electrification expertise, and there are still deficiencies in flexible layout, real-time interaction, specialization, and multi-user collaboration on the web side. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a method for designing a distribution system monitoring diagram in a Web list format.

[0005] The present invention provides a method for designing a power distribution system monitoring diagram in a Web list format, comprising the following steps:

[0006] Step 1: Summarize the general characteristics of high and low voltage power distribution systems, automatically adapt and retrieve corresponding table cells according to the logical relationship between electrical components, load electrical graphic elements, obtain the monitoring diagram layout, and ensure that electrical symbols are displayed correctly;

[0007] Step 2: Use Web front-end technology to achieve real-time data updates to ensure that the monitoring map is synchronized with the back-end database information;

[0008] Step 3: Dynamically obtain electrical parameters and reflect them in real time on the monitoring diagram. When the data is abnormal, issue an early warning and mark the fault location.

[0009] Preferably, the specific working method of step 1 is as follows:

[0010] First, the general characteristics of high and low voltage power distribution systems are summarized, specifically identifying all electrical components in the distribution system and defining properties for each component;

[0011] Analyze the characteristics of the power distribution system and design a matrix that describes the relationship between nodes and branches, where nodes are rows and branches are columns. If the starting point of the branch is node i, then A=1; if the end point of the branch is node i, then A=-1; if there is no direct connection, then A=0;

[0012] After that, the shortest path between nodes is found and the appropriate graph theory algorithm is selected to automatically arrange the positions of electrical components in the table;

[0013] Automatically adjust the size of table cells according to the size and shape of electrical symbols to ensure that the symbols can be fully displayed and generate a complete monitoring diagram layout;

[0014] Check whether the generated monitoring diagram layout complies with the standards and specifications of electrical design;

[0015] The generated monitoring map layout is integrated into the Web application so that users can access and operate it through a browser.

[0016] Preferably, the specific method of finding the shortest path between nodes is as follows:

[0017] set up From source to node The shortest distance, S is the node set of the currently determined shortest path;

[0018] First initialize , indicating that the shortest distance from the source point S to itself is 0;

[0019] Then according to the formula , find the shortest path between nodes, where is the weight of the edge from node s to node i, indicating the distance from s to i.

[0020] Preferably, the specific working method of step 2 is as follows:

[0021] Send a request to the server via AJAX or other HTTP client libraries to request the latest monitoring chart layout data;

[0022] After receiving the request, the server checks whether there is new data update. If there is no new data, the server will keep the request pending until there is new data or the timeout limit is reached;

[0023] Once the server has new monitoring graph data updated, it will immediately respond to the client's request and send the updated data to the client;

[0024] After receiving the new data, the client uses this data to update the current monitoring map layout. After the update is completed, the client immediately sends the next request to check for more updates.

[0025] Preferably, the specific working method of step three is as follows:

[0026] Collect electrical parameters of power distribution system operation;

[0027] According to the normal range of electrical parameters, set the corresponding threshold;

[0028] Real-time monitoring of electrical parameters and comparison with preset thresholds. Once the parameters exceed the thresholds, the system will automatically generate an early warning signal.

[0029] The warning signal will be notified to the operation and maintenance personnel, and the fault location will be marked on the monitoring map.

[0030] Preferably, the specific method of performing fault location marking is as follows:

[0031] According to the formula , the fault distance d is calculated, where v is the speed of the traveling wave, and t is the time difference from the fixed occurrence to the arrival of the traveling wave at the monitoring point;

[0032] According to the formula , the fault current I is calculated, where V is the fault point voltage and Z is the system impedance;

[0033] After the system automatically generates a warning signal, the fault distance d and the fault current I are transmitted to the mobile phone terminal of the operation and maintenance personnel through a signal.

[0034] Preferably, the specific working method of step three also includes:

[0035] In the process of collecting electrical parameters of the power distribution system operation, a unique digital signature and timestamp is created for each data source parameter;

[0036] Design a processing system that automatically adds the hash value and digital signature of the data to the processing system whenever the data source is updated, and records the integrity of the data by verifying the hash value and digital signature of the data;

[0037] Automatically optimize fusion parameters based on electrical parameter characteristics and environmental conditions.

[0038] Preferably, the specific method of automatically optimizing the fusion parameters according to the electrical parameter characteristics and environmental conditions is as follows:

[0039] Set an initial weight vector w of the filter;

[0040] Obtain electrical parameters x of the power distribution system operation;

[0041] Get the expected signal y;

[0042] The input value m is obtained by using the initial weight vector w of the electrical parameter x, and the difference e between the input value m and the expected signal y is calculated;

[0043] A threshold for setting the difference e is implemented. If the difference e is greater than the threshold, the weight vector w is updated using the LMS algorithm, and the above steps are repeated to calculate a new difference e1 until the new difference e1 is less than the threshold.

[0044] Preferably, the specific working method of step three also includes:

[0045] It can be defined as a set of permissions;

[0046] Users can be assigned one or more roles, thereby inheriting corresponding permissions;

[0047] Integrate permission checks in the user interface to ensure that users can only access the resources they are authorized to access;

[0048] Dynamically adjust permissions based on user behavior or environmental factors.

[0049] Preferably, the specific working method of step three also includes:

[0050] Design a version control system to track the change history of files;

[0051] Every time a user submits a change, the system records the details of the version, including the change content, timestamp, and the user who performed the operation.

[0052] Provide an interface for users to compare the differences between different versions and allow users to roll back to any previous version.

[0053] Beneficial effects: Improve the online design and management efficiency of electrical system diagrams in the substation monitoring system. Through the optimization of table layout in the web environment, intuitive presentation and efficient control of electrical component configuration, line monitoring and system status can be achieved. This can overcome the limitations of rigid layout and inconvenient interaction in existing technologies and promote design efficiency and modernization of system management. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 It is a flow chart of the management system of the present invention. DETAILED DESCRIPTION

[0055] Application scenarios: Although there are a variety of electrical CAD software on the market that support system diagram design, the traditional electrical system diagram design method requires system software designers to master a fairly high level of electrification expertise, and there are still deficiencies in flexible layout, real-time interaction, specialization, and multi-user collaboration on the web side.

[0056] like Figure 1 As shown: A method for designing a power distribution system monitoring diagram in a Web list format, comprising the following steps:

[0057] Step 1: Summarize the general characteristics of high and low voltage power distribution systems, automatically adapt and retrieve the corresponding table cells according to the logical relationship between electrical components, load electrical diagram elements, obtain the monitoring diagram layout, and ensure that electrical symbols are displayed correctly; It should be noted that general characteristics usually refer to some standard properties and behaviors in system design and operation. The electrical components in the power distribution system (such as transformers, circuit breakers, cables, etc.) usually have standardized sizes and electrical characteristics, which is conducive to the subsequent monitoring diagram layout;

[0058] Step 2: Use Web front-end technology to achieve real-time data update to ensure that the monitoring map is synchronized with the back-end database information; it should be noted that it is convenient to switch the monitoring map of different scenes and the real-time monitoring data;

[0059] Step 3: Dynamically obtain electrical parameters and reflect them in real time on the monitoring diagram. When the data is abnormal, issue an early warning and mark the fault location.

[0060] In actual applications, a set of electrical symbol components that meet industry standards is designed, and the corresponding components are called according to the electrical circuit properties and placed in the webpage table, which automatically adapts to the table cell size to achieve fast layout and precise alignment;

[0061] Use React or Vue framework to build a smooth zoom and pan operation experience to ensure that the electrical system diagram can be displayed clearly and completely on screens with different resolutions;

[0062] It not only simplifies the online design process of the electrical system diagram of the power distribution monitoring system and reduces the workload of designers, but also significantly improves the accuracy and response speed of system monitoring through real-time data interface and intelligent layout strategy. Its excellent interactivity and multi-platform compatibility provide strong support for cross-departmental and cross-regional collaborative work.

[0063] As an optional embodiment: the specific working method of step 1 is as follows:

[0064] First, the general characteristics of high and low voltage power distribution systems are summarized, specifically identifying all electrical components in the power distribution system and defining properties for each component; it should be noted that this includes its type, specification, connection method, etc.

[0065] Analyze the characteristics of the power distribution system and design a matrix that describes the relationship between nodes and branches, with nodes as rows and branches as columns. If the starting point of the branch is node i, then A=1; if the end point of the branch is node i, then A=-1; if there is no direct connection, then A=0; It should be noted that the purpose is to identify common characteristics in the system, such as common electrical components (such as transformers, circuit breakers, cables, etc.) and their connection methods;

[0066] If the connections in an electrical system are directional (e.g., current can only flow in one direction), a directed graph is needed to represent the relationship;

[0067] Afterwards, the shortest path between nodes is found, and a suitable graph theory algorithm is selected to automatically arrange the positions of the electrical components in the table; it should be noted that, in this embodiment, the suitable graph theory algorithm can be implemented by the following scheme: the positions of the components in the table are initialized randomly or based on some heuristic rules (such as by type, voltage level), and the force acting on each component is calculated according to the connection relationship and distance between the components to push them to move toward or away from each other, and the positions of the components are iteratively adjusted until a balanced state is reached, that is, the layout between the components reflects their connection relationship and avoids overlap and crowding;

[0068] Automatically adjust the size of table cells according to the size and shape of electrical symbols to ensure that the symbols can be fully displayed and generate a complete monitoring diagram layout;

[0069] Check whether the generated monitoring diagram layout meets the standards and specifications of electrical design; it should be noted that the electrical symbols are placed in the corresponding table cells, and the connection points of the symbols are aligned with the cell boundaries to facilitate the representation of electrical connections. If the result of automatic layout is not ideal, a manual adjustment function is provided to allow users to fine-tune the position of components and the size of cells;

[0070] The generated monitoring map layout is integrated into the Web application so that users can access and operate it through a browser.

[0071] As an optional embodiment: the specific method of finding the shortest path between nodes is as follows:

[0072] set up From source to node The shortest distance, S is the node set of the currently determined shortest path;

[0073] First initialize , indicating that the shortest distance from the source point S to itself is 0;

[0074] Then according to the formula , find the shortest path between nodes, where is the weight of the edge from node s to node i, indicating the distance from s to i. It should be noted that in this embodiment, the above formula is used to update the shortest path length from source point s to node i, where S is the set of nodes whose shortest paths have been determined. For each domain s of node i, check whether the path from the source point to i through s is shorter than the currently known path. If so, update for this shorter path length.

[0075] As an optional embodiment: the specific working method of step 2 is as follows:

[0076] Send a request to the server via AJAX or other HTTP client libraries to request the latest monitoring chart layout data;

[0077] After receiving the request, the server checks whether there is new data update. If there is no new data, the server will keep the request pending until there is new data or the timeout limit is reached;

[0078] Once the server has new monitoring graph data updated, it will immediately respond to the client's request and send the updated data to the client;

[0079] After receiving the new data, the client uses the data to update the current monitoring map layout. After the update is completed, the client immediately sends the next request to check for more updates. It should be noted that users can see the latest monitoring map layout instantly without manually refreshing the page, which improves the user's interactive experience. By reducing unnecessary network requests and server resource consumption, long polling helps optimize the overall performance and scalability of the system.

[0080] As an optional embodiment: the specific working method of step three is as follows:

[0081] Collect electrical parameters of the power distribution system operation; such as voltage, current, power and other parameters. These data can be transmitted to the data processing center through wireless sensor networks or wired connections;

[0082] According to the normal range of electrical parameters, set corresponding thresholds; these thresholds can be the maximum and minimum values ​​of parameters such as voltage, current, and power;

[0083] Real-time monitoring of electrical parameters and comparison with preset thresholds. Once the parameters exceed the thresholds, the system will automatically generate an early warning signal.

[0084] The warning signal is notified to the operation and maintenance personnel, and the fault location is marked on the monitoring map. The system will notify the operation and maintenance personnel through SMS, APP push, etc. The operation and maintenance personnel will quickly handle the fault according to the warning information and fault location. During the handling process, the system can monitor the on-site handling of the staff throughout the process, and upload the recovery information to the command center after the fault is restored, completing the closed loop of fault event handling;

[0085] It can realize dynamic data acquisition, real-time update, fault warning and precise positioning of the distribution system monitoring diagram, thereby improving the monitoring efficiency and reliability of the distribution system;

[0086] In this embodiment, this real-time monitoring and early warning mechanism can trigger the layout update in step 1. For example, when the parameters of an electrical component exceed the normal range, the system can automatically adjust the position or size of the component in the layout to highlight its abnormal state;

[0087] This real-time data can be used to dynamically adjust the layout of the electrical system diagram, for example, adjusting the display thickness of the cable according to the change of current load, or changing the color of the transformer symbol according to the change of voltage;

[0088] For example, suppose a transformer in a power distribution system has a high temperature due to overload. Through real-time monitoring in step 3, the system can immediately detect this abnormality and generate an early warning signal.

[0089] Based on this early warning signal, the adaptive layout algorithm in step 1 can automatically adjust the display of the transformer in the system diagram, for example, by changing the color or adding special marks to alert operators;

[0090] At the same time, the long polling mechanism in step 2 ensures that the layout change can be reflected in real time on the interfaces of all clients, so that operators in different locations can immediately see the change and take corresponding measures;

[0091] Through this combination, the distribution system monitoring diagram design can not only provide static layout design, but also realize dynamic, real-time monitoring and early warning, greatly improving the availability and reliability of the system. This real-time and dynamic nature is an indispensable feature in the management of modern distribution systems. They enable the system to respond quickly to various changes, thereby ensuring the stability and security of power supply.

[0092] As an optional embodiment: the specific method of performing fault location marking is as follows:

[0093] According to the formula , the fault distance d is calculated, where v is the speed of the traveling wave, and t is the time difference from the fixed occurrence to the arrival of the traveling wave at the monitoring point;

[0094] According to the formula , the fault current I is calculated, where V is the fault point voltage and Z is the system impedance;

[0095] After the system automatically generates a warning signal, the fault distance d and the fault current I are transmitted to the mobile phone terminal of the operation and maintenance personnel through a signal.

[0096] As an optional embodiment: the specific working method of step three also includes:

[0097] In the process of collecting electrical parameters of the distribution system operation, a unique digital signature and timestamp is created for the parameters of each data source; every step from data collection to processing and fusion can be recorded on a decentralized, open and transparent blockchain;

[0098] Design a processing system that automatically adds the hash value and digital signature of the data to the processing system whenever the data source is updated, and records the integrity of the data by verifying the hash value and digital signature of the data; ensure the credibility and traceability of the data during the fusion process. This approach can significantly improve the security and transparency of the data and help quickly locate the source of the problem when anomalies are found;

[0099] Automatically optimize fusion parameters based on electrical parameter characteristics and environmental conditions.

[0100] In the context of smart grids, the distribution system monitoring diagram needs to process a large amount of data from different sources, including status monitoring information, live detection information, manual inspection information, etc. These data have different characteristics and forms, and it is difficult to effectively collect and integrate these multi-source information, eliminate abnormal and bad data, and extract feature information;

[0101] This technical solution can solve the challenges of multi-source information fusion and processing, improve the accuracy and real-time performance of distribution system monitoring diagrams, and ensure the security and transparency of data.

[0102] As an optional embodiment: the specific method of automatically optimizing the fusion parameters according to the electrical parameter characteristics and environmental conditions is as follows:

[0103] Set an initial weight vector w of the filter; usually it can be initialized to zero or a small random value;

[0104] Obtain electrical parameters x of the power distribution system operation; this is the real-time measurement value of electrical parameters such as voltage, current, etc.;

[0105] Obtain the expected signal y; this is a target value or reference value set based on environmental conditions and historical data;

[0106] The input value m is obtained by using the initial weight vector w of the electrical parameter x, and the difference e between the input value m and the expected signal y is calculated;

[0107] A threshold value of the difference e is set. If the difference e is greater than the threshold value, the weight vector w is updated using the LMS algorithm, and the above steps are repeated to calculate a new difference e1 until the new difference e1 is less than the threshold value. It should be noted that the specific steps of the LMS algorithm to update the weight vector w can be obtained by adding the initial weight vector w plus the correlation factor multiplied by the difference e plus the electrical parameter x, where the correlation factor is dynamically adjusted according to changes in environmental conditions, with an initial value of 1 and a value range of 0 to 2, which changes with the difference between environmental conditions and normal conditions;

[0108] Through the above steps, a dynamic data fusion strategy can be implemented, which enables the system to automatically optimize the fusion parameters according to the characteristics of real-time data and environmental conditions, and improve the accuracy and real-time performance of the distribution system monitoring diagram.

[0109] As an optional embodiment: the specific working method of step three also includes:

[0110] It can be defined as a set of permissions; for example, administrator, editor, observer, etc., which can be subdivided into data viewing permissions, data modification permissions, etc., corresponding to page permissions, menu permissions, button permissions, etc. in system design;

[0111] Users can be assigned one or more roles, thereby inheriting corresponding permissions;

[0112] Integrate permission checks in the user interface to ensure that users can only access the resources they are authorized to access; for example, in front-end frameworks such as React, Angular, or Vue, you can use the CASL library to implement permission control

[0113] Dynamically adjust permissions based on user behavior or environmental factors. For example, the attribute-based access control (ABAC) model can combine user attributes (such as location, time) with data attributes (such as data type, creation date) to dynamically determine access permissions.

[0114] In a multi-user environment, different users may need to operate and edit the distribution system monitoring diagram at the same time. This requires the system to be able to handle concurrent operations, ensuring that all users can see the latest and consistent data view while avoiding data conflicts and inconsistencies. This technical solution can solve the above problems.

[0115] As an optional embodiment: the specific working method of step three also includes:

[0116] Design a version control system to track the change history of files;

[0117] Every time a user submits a change, the system records the details of the version, including the change content, timestamp, and the user who performed the operation.

[0118] Provide an interface for users to compare the differences between different versions and allow users to roll back to any previous version. Through the above solution, it can ensure that different users perform different operations according to their roles and permissions, and can track historical changes in the collaborative editing process, compare different versions and roll back to the previous version, thereby improving the flexibility and usability of the system.

[0119] How it works

[0120] Improve the online design and management efficiency of electrical system diagrams in the substation monitoring system. Through the optimization of table layout in the web environment, intuitive presentation and efficient control of electrical component configuration, line monitoring and system status can be achieved. This can overcome the limitations of rigid layout and inconvenient interaction in existing technologies and promote the modernization of design efficiency and system management.

[0121] The above are only preferred implementations of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technical staff in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of this template.

Claims

1. A method for designing a power distribution system monitoring diagram in a Web list format, characterized in that: The following steps are involved: Step 1: Summarize the general characteristics of high and low voltage power distribution systems, automatically adapt and retrieve corresponding table cells according to the logical relationship between electrical components, load electrical graphic elements, obtain the monitoring diagram layout, and ensure that electrical symbols are displayed correctly; Step 2: Use Web front-end technology to achieve real-time data updates to ensure that the monitoring map is synchronized with the back-end database information; Step 3: Dynamically obtain electrical parameters and reflect them in real time on the monitoring diagram. When the data is abnormal, issue an early warning and mark the fault location.

2. The method for designing a power distribution system monitoring diagram in a Web list format according to claim 1, characterized in that: The specific working method of step 1 is as follows: First, the general characteristics of high and low voltage power distribution systems are summarized, specifically identifying all electrical components in the distribution system and defining properties for each component; Analyze the characteristics of the power distribution system and design a matrix that describes the relationship between nodes and branches, where nodes are rows and branches are columns. If the starting point of the branch is node i, then A=1; if the end point of the branch is node i, then A=-1; if there is no direct connection, then A=0; After that, the shortest path between nodes is found and the appropriate graph theory algorithm is selected to automatically arrange the positions of electrical components in the table; Automatically adjust the size of table cells according to the size and shape of electrical symbols to ensure that the symbols can be fully displayed and generate a complete monitoring diagram layout; Check whether the generated monitoring diagram layout complies with the standards and specifications of electrical design; The generated monitoring map layout is integrated into the Web application so that users can access and operate it through a browser.

3. The method for designing a power distribution system monitoring diagram in a Web list format according to claim 2, characterized in that: The specific method of finding the shortest path between nodes is as follows: set up From source to node The shortest distance, S is the node set of the currently determined shortest path; First initialize , indicating that the shortest distance from the source point S to itself is 0; Then according to the formula , find the shortest path between nodes, where is the weight of the edge from node s to node i, indicating the distance from s to i.

4. The method for designing a power distribution system monitoring diagram in a Web list format according to claim 1, characterized in that: The specific working method of step 2 is as follows: Send a request to the server via AJAX or other HTTP client libraries to request the latest monitoring chart layout data; After receiving the request, the server checks whether there is new data update. If there is no new data, the server will keep the request pending until there is new data or the timeout limit is reached; Once the server has new monitoring graph data updated, it will immediately respond to the client's request and send the updated data to the client; After receiving the new data, the client uses this data to update the current monitoring map layout. After the update is completed, the client immediately sends the next request to check for more updates.

5. The method for designing a power distribution system monitoring diagram in a Web list format according to claim 1, characterized in that: The specific working method of step three is as follows: Collect electrical parameters of power distribution system operation; According to the normal range of electrical parameters, set the corresponding threshold; Real-time monitoring of electrical parameters and comparison with preset thresholds. Once the parameters exceed the thresholds, the system will automatically generate an early warning signal. The warning signal will be notified to the operation and maintenance personnel, and the fault location will be marked on the monitoring map.

6. The method for designing a power distribution system monitoring diagram in a Web list format according to claim 5, characterized in that: The specific method of performing fault location marking is as follows: According to the formula , the fault distance d is calculated, where v is the speed of the traveling wave, and t is the time difference from the fixed occurrence to the arrival of the traveling wave at the monitoring point; According to the formula , the fault current I is calculated, where V is the fault point voltage and Z is the system impedance; After the system automatically generates a warning signal, the fault distance d and the fault current I are transmitted to the mobile phone terminal of the operation and maintenance personnel through a signal.

7. The method for designing a power distribution system monitoring diagram in a Web list format according to claim 5, characterized in that: The specific working method of step three also includes: In the process of collecting electrical parameters of the power distribution system operation, a unique digital signature and timestamp is created for each data source parameter; Design a processing system that automatically adds the hash value and digital signature of the data to the processing system whenever the data source is updated, and records the integrity of the data by verifying the hash value and digital signature of the data; Automatically optimize fusion parameters based on electrical parameter characteristics and environmental conditions.

8. The method for designing a power distribution system monitoring diagram in a Web list format according to claim 7, characterized in that: The specific method of automatically optimizing the fusion parameters according to the electrical parameter characteristics and environmental conditions is as follows: Set an initial weight vector w of the filter; Obtain electrical parameters x of the power distribution system operation; Get the expected signal y; The input value m is obtained by using the initial weight vector w of the electrical parameter x, and the difference e between the input value m and the expected signal y is calculated; A threshold for setting the difference e is implemented. If the difference e is greater than the threshold, the weight vector w is updated using the LMS algorithm, and the above steps are repeated to calculate a new difference e1 until the new difference e1 is less than the threshold.

9. The method for designing a power distribution system monitoring diagram in a Web list format according to claim 5, characterized in that: The specific working method of step three also includes: It can be defined as a set of permissions; Users can be assigned one or more roles, thereby inheriting corresponding permissions; Integrate permission checks in the user interface to ensure that users can only access the resources they are authorized to access; Dynamically adjust permissions based on user behavior or environmental factors.

10. The method for designing a power distribution system monitoring diagram in a Web list format according to claim 9, characterized in that: The specific working method of step three also includes: Design a version control system to track the change history of files; Every time a user submits a change, the system records the details of the version, including the change content, timestamp, and the user who performed the operation. Provide an interface for users to compare the differences between different versions and allow users to roll back to any previous version.

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