Distribution network short-circuit distance calculation system and method based on mobile terminal

Abstract

The invention belongs to the technical field of power system calculation, and discloses a distribution network short-circuit distance calculation system based on a mobile terminal, which is based on uniapp cross-terminal development framework construction, and integrates three core function modules of transformer substation bus impedance management, wire parameter management and short-circuit distance formula calculation. According to the method, basic parameters such as transformer substation bus voltage, maximum / minimum mode total impedance and the like and impedance data of wires of different models are stored in a structured mode, and a preset short-circuit distance calculation formula is combined, so that rapid calculation of the short-circuit distance and the number of corresponding towers is automatically completed after the basic parameters are input. The invention further discloses a calculation method. The problems that a traditional distribution network short-circuit distance calculation process is tedious, errors are prone to occurring, and data management is scattered are solved, the method has the advantages of being convenient and fast to operate, efficient in calculation, capable of achieving data localization storage and flexible expansion, and the method is suitable for electric power operation and maintenance personnel to rapidly carry out short-circuit distance calculation work on site.

Description

Technical Field

[0001] This invention relates to the field of power system calculation technology, specifically to a distribution network short-circuit distance calculation system and method based on a mobile terminal. Background Technology

[0002] In distribution network operation and maintenance, short-circuit distance calculation is a crucial foundation for assessing the scope of distribution network faults and developing operation and maintenance plans. Traditional methods of short-circuit distance calculation primarily rely on manually consulting paper parameter tables and manually substituting formulas, which presents several problems: basic parameters such as substation bus impedance and conductor impedance are stored in a scattered manner, making them inconvenient to access and retrieve, and prone to parameter selection errors; the manual calculation process is cumbersome, involving multiplication and division of multiple parameters, resulting in low calculation efficiency and a high risk of errors; the lack of convenient mobile tools means that maintenance personnel cannot quickly complete calculations on-site and must return to the office to use computer software, impacting work efficiency; adding or updating substation parameters requires reorganizing parameter tables, resulting in poor data management flexibility. With the development of mobile technology, mobile-based power calculation tools are becoming an industry trend, thus necessitating a convenient, efficient, and accurate distribution network short-circuit distance calculation solution.

[0003] CN112785082A discloses a training method and apparatus for a learning-based approximate calculation model of shortest path distance in road networks, relating to the field of information retrieval technology. The method includes: acquiring road information corresponding to a city; generating a road network corresponding to the city based on the road information; randomly initializing each node in the road network as a low-dimensional vector representation; acquiring training data corresponding to the road network; wherein each training data includes: origin samples, destination samples, and shortest path distance labels; training the vector representations of the road network nodes using the training data; adjusting the parameters of the approximate calculation model of shortest path distance in road networks based on the error between the vector distances between the vector representations and the shortest path distance labels; and generating the final approximate calculation model of shortest path distance in road networks. Therefore, the approximate calculation model of shortest path distance in road networks can quickly and effectively obtain the shortest path between the origin and destination. However, it is not suitable for calculating the shortest path distance in distribution networks on mobile devices. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a mobile-based distribution network short-circuit distance calculation system and method, aiming to solve the problems of low efficiency, error-proneness, and fragmented data management in traditional short-circuit distance calculation methods. To achieve the above objectives, this invention adopts the following technical solution:

[0005] A mobile-based distribution network short-circuit distance calculation system, characterized in that it includes: a data storage module, an interactive interface module, a form verification module, a calculation core module, and a data management module;

[0006] Data storage module: It adopts a local caching mechanism on the mobile terminal to store substation basic information and conductor parameter information. The substation basic information includes: substation name, bus voltage, maximum mode total impedance, and minimum mode total impedance. The conductor parameter information includes: conductor type and conductor impedance. The preset parameters are written to the cache upon initial startup, and the cache is refreshed synchronously with subsequent data updates to ensure data persistence and fast retrieval.

[0007] The user interface module is built on the uniapp cross-platform development framework and adopts a collapsible panel design, including three main functional panels: a distance formula calculation panel, a substation bus impedance management panel, and a conductor parameter display panel. Specifically: The distance formula calculation panel provides substation dropdown selection, conductor length input, conductor type dropdown selection, fault current input, and reset and calculation buttons. The calculation result display area shows the short-circuit distance and number of towers under large / small modes. The substation bus impedance management panel provides add, import, edit, and delete buttons, displays all substation parameters in tabular form, and supports pop-up add / edit forms. The conductor parameter display panel displays all conductor types and their corresponding impedance parameters in tabular form for easy user reference.

[0008] Form validation module: validates the required parameters in the distance formula calculation panel. The required parameters are: substation, length of conductor before switch, type of conductor before / after switch, and fault current. The calculation is performed only after the parameters are complete.

[0009] The core calculation module is the system's core computing unit. It has a built-in short-circuit distance calculation formula and automatically calculates the short-circuit distance and number of towers under both large and small modes based on user-input parameters and matched basic data. The calculation formula is as follows:

[0010] Large mode short-circuit distance = (0.866 × 5500 / fault current - minimum mode total impedance - length of conductor before switch × impedance of conductor before switch) / impedance of conductor after switch;

[0011] Small mode short circuit distance = (0.866 × 5500 / fault current - maximum mode total impedance - length of conductor before switch × impedance of conductor before switch) / impedance of conductor after switch, where 0.866 is the phase compensation coefficient when the three-phase AC circuit is running symmetrically, and 5500 is the reference short circuit current.

[0012] Number of towers = Short-circuit distance × 1000 / 60, round the result up;

[0013] Data management module: Supports adding, editing, and deleting substation bus impedance data. When adding data, it verifies the uniqueness of the substation name. After the operation is completed, it synchronously updates the local cache and drop-down selection list to ensure data consistency.

[0014] The aforementioned mobile-based distribution network short-circuit distance calculation system is built on the uniapp framework, with HBuilderX as the development environment. The specific implementation steps are as follows:

[0015] Project initialization: Create a uniapp project and import the uni-ui component library, which includes uni-collapse, uni-data-select, uni-number-box, and uni-table components;

[0016] Data storage module: Local caching is implemented using uniapp's uni.setStorageSync and uni.getStorageSync APIs. During initialization, the preset substation parameters and conductor parameters are written to the cache.

[0017] Interactive Interface Module: A collapsible function panel is constructed using the uni-collapse component. The first panel is the distance formula calculation panel, which is expanded by default; the second panel is the substation bus impedance management panel; and the third panel is the conductor parameter display panel. In the distance formula calculation panel, the substation selection list and conductor type selection list are bound to the uni-data-select component, and the numerical parameter input is implemented using the uni-number-box component, allowing setting the step size and value range. In the substation bus impedance management panel, the substation data is displayed using the uni-table component, the add button is bound to a pop-up form (uni-popup-dialog), and the edit / delete buttons are bound to the corresponding data operation logic.

[0018] Form validation module: Based on the rules property of the uni-forms component, configure the validation rules for required fields, and call the validate method to validate before submitting the calculation;

[0019] The core module for calculation is: write a submit method, obtain user input parameters, match the corresponding substation impedance and conductor impedance, substitute them into the formula to calculate and update the result display area;

[0020] Data Management Module: Write the dialogInputConfirm method to handle the logic of adding new substation data, including name uniqueness verification, and call the updateData method to synchronously update the cache after adding data.

[0021] A method for calculating the short-circuit distance in a distribution network based on a mobile terminal, implementing the system described above, characterized in that the calculation method includes the following steps:

[0022] S1: System initialization, loading local cache data, generating selection lists. The local cache data includes: substation bus impedance data and conductor parameter data; generating selection lists refers to generating substation selection lists and conductor type selection lists.

[0023] S2: Parameter input. Select the substation and conductor type, input the length and fault current. In the distance formula calculation panel, the user selects the substation, inputs the conductor length before the switch, selects the conductor type before / after the switch, and inputs the fault current.

[0024] S3: Form validation. The form validation module checks whether all required parameters are complete. If they are incomplete, the user is prompted to supplement them. If they are complete, step S4 is executed.

[0025] S4: Parameter matching, parameters substation and conductor impedance data, match the corresponding maximum mode total impedance and minimum mode total impedance according to the selected substation ID, and match the corresponding conductor impedance according to the selected conductor type;

[0026] S5: Formula calculation. The short-circuit distance and the number of towers are calculated using the formula for short-circuit distance in both large and small modes. The core module substitutes the formula for short-circuit distance calculation, calculates the short-circuit distance under both large and small modes, converts it into the corresponding number of towers, and rounds the result up.

[0027] S6: Results display. The short-circuit distance and number of towers are displayed on the user interface. The calculation results are displayed in a designated area of ​​the interactive interface for users to view.

[0028] S7: Data Management. Users can add, edit, or delete substation data. They can add / edit / delete substation data through the substation bus impedance management panel. The "Add" button opens a pop-up form where users can input new substation parameters: substation name, bus voltage, and maximum / minimum total impedance. After verifying the uniqueness of the substation name, the system adds the new data to the local cache and display table. Users can also edit or delete existing data, and the local cache and selection list are updated synchronously after the operation is completed.

[0029] The present invention has the following main beneficial technical effects:

[0030] 1. Highly efficient and accurate calculation: Built-in standardized calculation formulas automatically match basic parameters and complete the calculation, avoiding human calculation errors and improving calculation efficiency by more than 80%.

[0031] 2. Easy to operate: Developed based on mobile devices, it supports on-site operation. The foldable interface design simplifies the operation process and is suitable for on-site operation scenarios of maintenance personnel.

[0032] 3. Flexible data management: Supports adding, editing, and deleting substation parameters, with local data storage that does not rely on the network. When adding new data, the uniqueness of the name is verified to ensure data accuracy.

[0033] 4. Cross-platform compatibility: Developed based on the uniapp framework, it can be adapted to mainstream mobile systems such as Android and iOS, and has good compatibility and scalability.

[0034] 5. User-friendly interface: Form validation ensures parameter integrity, and pop-up prompts and visual results display enhance the user experience. Attached Figure Description

[0035] Figure 1 This is a flowchart of the method of the present invention. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0037] Implementation Example 1: A mobile terminal-based distribution network short-circuit distance calculation system, characterized in that it includes: a data storage module, an interactive interface module, a form verification module, a calculation core module, and a data management module;

[0038] Data storage module: It adopts a local caching mechanism on the mobile terminal to store substation basic information and conductor parameter information. The substation basic information includes: substation name, bus voltage, maximum mode total impedance, and minimum mode total impedance. The conductor parameter information includes: conductor type and conductor impedance. The preset parameters are written to the cache upon initial startup, and the cache is refreshed synchronously with subsequent data updates to ensure data persistence and fast retrieval.

[0039] The user interface module is built on the uniapp cross-platform development framework and adopts a collapsible panel design, including three main functional panels: a distance formula calculation panel, a substation bus impedance management panel, and a conductor parameter display panel. Specifically: The distance formula calculation panel provides substation dropdown selection, conductor length input, conductor type dropdown selection, fault current input, and reset and calculation buttons. The calculation result display area shows the short-circuit distance and number of towers under large / small modes. The substation bus impedance management panel provides add, import, edit, and delete buttons, displays all substation parameters in tabular form, and supports pop-up add / edit forms. The conductor parameter display panel displays all conductor types and their corresponding impedance parameters in tabular form for easy user reference.

[0040] Form validation module: validates the required parameters in the distance formula calculation panel. The required parameters are: substation, length of conductor before switch, type of conductor before / after switch, and fault current. The calculation is performed only after the parameters are complete.

[0041] The core calculation module is the system's core computing unit. It has a built-in short-circuit distance calculation formula and automatically calculates the short-circuit distance and number of towers under both large and small modes based on user-input parameters and matched basic data. The calculation formula is as follows:

[0042] Large mode short-circuit distance = (0.866 × 5500 / fault current - minimum mode total impedance - length of conductor before switch × impedance of conductor before switch) / impedance of conductor after switch;

[0043] Small mode short circuit distance = (0.866 × 5500 / fault current - maximum mode total impedance - length of conductor before switch × impedance of conductor before switch) / impedance of conductor after switch, where 0.866 is the phase compensation coefficient when the three-phase AC circuit is running symmetrically, and 5500 is the reference short circuit current.

[0044] Number of towers = Short-circuit distance × 1000 / 60, round the result up;

[0045] Data management module: Supports adding, editing, and deleting substation bus impedance data. When adding data, it verifies the uniqueness of the substation name. After the operation is completed, it synchronously updates the local cache and drop-down selection list to ensure data consistency.

[0046] The aforementioned mobile-based distribution network short-circuit distance calculation system is built on the uniapp framework, with HBuilderX as the development environment. The specific implementation steps are as follows:

[0047] Project initialization: Create a uniapp project and import the uni-ui component library, which includes uni-collapse, uni-data-select, uni-number-box, and uni-table components;

[0048] Data storage module: Local caching is implemented using uniapp's uni.setStorageSync and uni.getStorageSync APIs. During initialization, the preset substation parameters and conductor parameters are written to the cache.

[0049] Interactive Interface Module: A collapsible function panel is constructed using the uni-collapse component. The first panel is the distance formula calculation panel, which is expanded by default; the second panel is the substation bus impedance management panel; and the third panel is the conductor parameter display panel. In the distance formula calculation panel, the substation selection list and conductor type selection list are bound to the uni-data-select component, and the numerical parameter input is implemented using the uni-number-box component, allowing setting the step size and value range. In the substation bus impedance management panel, the substation data is displayed using the uni-table component, the add button is bound to a pop-up form (uni-popup-dialog), and the edit / delete buttons are bound to the corresponding data operation logic.

[0050] Form validation module: Based on the rules property of the uni-forms component, configure the validation rules for required fields, and call the validate method to validate before submitting the calculation;

[0051] The core module for calculation is: write a submit method, obtain user input parameters, match the corresponding substation impedance and conductor impedance, substitute them into the formula to calculate and update the result display area;

[0052] Data Management Module: Write the dialogInputConfirm method to handle the logic of adding new substation data, including name uniqueness verification, and call the updateData method to synchronously update the cache after adding data.

[0053] Implementation Example 2: Please see Figure 1 A method for calculating the short-circuit distance in a distribution network based on a mobile terminal, implemented in conjunction with the system of Implementation Example 1, is characterized by comprising the following steps:

[0054] S1: System initialization, loading local cache data, generating selection lists. The local cache data includes: substation bus impedance data and conductor parameter data; generating selection lists refers to generating substation selection lists and conductor type selection lists.

[0055] S2: Parameter input. Select the substation and conductor type, input the length and fault current. In the distance formula calculation panel, the user selects the substation, inputs the conductor length before the switch, selects the conductor type before / after the switch, and inputs the fault current.

[0056] S3: Form validation. The form validation module checks whether all required parameters are complete. If they are incomplete, the user is prompted to supplement them. If they are complete, step S4 is executed.

[0057] S4: Parameter matching, parameters substation and conductor impedance data, match the corresponding maximum mode total impedance and minimum mode total impedance according to the selected substation ID, and match the corresponding conductor impedance according to the selected conductor type;

[0058] S5: Formula calculation. The short-circuit distance and the number of towers are calculated using the formula for short-circuit distance in both large and small modes. The core module substitutes the formula for short-circuit distance calculation, calculates the short-circuit distance under both large and small modes, converts it into the corresponding number of towers, and rounds the result up.

[0059] S6: Results display. The short-circuit distance and number of towers are displayed on the user interface. The calculation results are displayed in a designated area of ​​the interactive interface for users to view.

[0060] S7: Data Management. Users can add, edit, or delete substation data. They can add / edit / delete substation data through the substation bus impedance management panel. The "Add" button opens a pop-up form where users can input new substation parameters: substation name, bus voltage, and maximum / minimum total impedance. After verifying the uniqueness of the substation name, the system adds the new data to the local cache and display table. Users can also edit or delete existing data, and the local cache and selection list are updated synchronously after the operation is completed.

[0061] The above-mentioned method for calculating distribution network short-circuit distance based on mobile terminal is characterized in that, when adding substation data in step S7, a uniqueness verification step for the substation name is also included. If the input substation name already exists, the user is prompted that the name is duplicated and the addition operation is terminated.

[0062] The above embodiments are merely preferred technical solutions of the present invention and should not be considered as limitations on the present invention. The scope of protection of the present invention should be limited to the technical solutions described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A mobile-based distribution network short-circuit distance calculation system, characterized in that: It includes: a data storage module, an interactive interface module, a form validation module, a core computing module, and a data management module.

2. The distribution network short-circuit distance calculation system based on a mobile terminal according to claim 1, characterized in that: Data storage module: It adopts a local caching mechanism on the mobile terminal to store substation basic information and conductor parameter information. The substation basic information includes: substation name, bus voltage, maximum mode total impedance, and minimum mode total impedance. The conductor parameter information includes: conductor type and conductor impedance. The preset parameters are written to the cache upon initial startup, and the cache is refreshed synchronously with subsequent data updates to ensure data persistence and fast retrieval. Interactive interface module: Built on the uniapp cross-platform development framework, it adopts a foldable panel design and includes three main functional panels: distance formula calculation panel, substation bus impedance management panel, and conductor parameter display panel. Among them, the distance formula calculation panel provides substation drop-down selection, conductor length numerical input, conductor type drop-down selection, fault current input box, as well as reset and calculation buttons. The calculation result display area is used to display the short-circuit distance and number of towers under large / small modes. Substation bus impedance management panel: Provides buttons for adding, importing, editing, and deleting, displays all substation parameters in tabular form, and supports pop-up add / edit forms; Conductor parameter display panel: Displays all conductor types and corresponding impedance parameters in tabular form for easy user reference; Form validation module: validates the required parameters in the distance formula calculation panel. The required parameters are: substation, length of conductor before switch, type of conductor before / after switch, and fault current. The calculation is performed only after the parameters are complete. The core calculation module is the system's core computing unit. It has a built-in short-circuit distance calculation formula and automatically calculates the short-circuit distance and the number of towers under large / small modes based on the user-input parameters and the matched basic data.

3. The distribution network short-circuit distance calculation system based on a mobile terminal according to claim 2, characterized in that: The formulas for calculating short-circuit distance and number of towers are as follows: Large mode short-circuit distance = (0.866 × 5500 / fault current - minimum mode total impedance - length of conductor before switch × impedance of conductor before switch) / impedance of conductor after switch; Small mode short circuit distance = (0.866 × 5500 / fault current - maximum mode total impedance - length of conductor before switch × impedance of conductor before switch) / impedance of conductor after switch, where 0.866 is the phase compensation coefficient when the three-phase AC circuit is running symmetrically, and 5500 is the reference short circuit current. Number of towers = Short-circuit distance × 1000 / 60, round the result up; Data management module: Supports adding, editing, and deleting substation bus impedance data. When adding data, it verifies the uniqueness of the substation name. After the operation is completed, it synchronously updates the local cache and drop-down selection list to ensure data consistency.

4. The distribution network short-circuit distance calculation system based on a mobile terminal according to claim 3, characterized in that: The system is designed based on the uniapp framework, using HBuilderX as the development environment. The specific implementation steps are as follows: Project initialization: Create a uniapp project and import the uni-ui component library, which includes uni-collapse, uni-data-select, uni-number-box, and uni-table components; Data storage module: Local caching is implemented using uniapp's uni.setStorageSync and uni.getStorageSync APIs. During initialization, the preset substation parameters and conductor parameters are written to the cache. Interactive interface module: The uni-collapse component is used to build a collapsible function panel. The first panel is the distance formula calculation panel, which is expanded by default; the second panel is the substation bus impedance management panel; and the third panel is the conductor parameter display panel. In the distance formula calculation panel, the substation selection list and conductor type selection list are bound to the uni-data-select component, and the numerical parameter input is realized through the uni-number-box component, setting the step size and value range; in the substation bus impedance management panel, the substation data is displayed through the uni-table component, the add button is bound to the pop-up form, the pop-up form is uni-popup-dialog, and the edit / delete buttons are bound to the corresponding data operation logic; Form validation module: Based on the rules property of the uni-forms component, configure the validation rules for required fields, and call the validate method to validate before submitting the calculation; The core module for calculation is: write a submit method, obtain user input parameters, match the corresponding substation impedance and conductor impedance, substitute them into the formula to calculate and update the result display area; Data Management Module: Write the dialogInputConfirm method to handle the logic of adding new substation data, including name uniqueness verification, and call the updateData method to synchronously update the cache after adding data.

5. A method for calculating distribution network short-circuit distance based on a mobile terminal, used in a distribution network short-circuit distance calculation system based on a mobile terminal as described in any one of claims 1 to 3, characterized in that, The calculation method includes the following steps: S1: System initialization, loading local cache data, generating selection lists. The local cache data includes: substation bus impedance data and conductor parameter data; generating selection lists refers to generating substation selection lists and conductor type selection lists. S2: Parameter input. Select the substation and conductor type, input the length and fault current. In the distance formula calculation panel, the user selects the substation, inputs the conductor length before the switch, selects the conductor type before / after the switch, and inputs the fault current. S3: Form validation. The form validation module checks whether all required parameters are complete. If they are incomplete, the user is prompted to supplement them. If they are complete, step S4 is executed. S4: Parameter matching, parameters substation and conductor impedance data, match the corresponding maximum mode total impedance and minimum mode total impedance according to the selected substation ID, and match the corresponding conductor impedance according to the selected conductor type; S5: Formula calculation. The short-circuit distance and the number of towers are calculated using the formula for short-circuit distance in both large and small modes. The core module substitutes the formula for short-circuit distance calculation, calculates the short-circuit distance under both large and small modes, converts it into the corresponding number of towers, and rounds the result up. S6: Results display. The short-circuit distance and number of towers are displayed on the user interface. The calculation results are displayed in a designated area of ​​the interactive interface for users to view. S7: Data Management. Users can add, edit, or delete substation data. They can add / edit / delete substation data through the substation bus impedance management panel. The pop-up form opens by clicking the "Add" button, and users can enter new substation parameters, including: substation name, bus voltage, and maximum / minimum total impedance. After the system verifies the uniqueness of the substation name, it adds the new data to the local cache and display table. Users can also edit or delete existing data, and the local cache and selection list are updated synchronously after the operation is completed.

6. The method for calculating the short-circuit distance in a distribution network based on a mobile terminal according to claim 5, characterized in that, When adding substation data in step S7, a uniqueness verification step for the substation name is also included. If the entered substation name already exists, the user name will be prompted as duplicated and the addition operation will be terminated.

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