A method and device for capacity and site planning of a power transformation and distribution station, equipment and medium

Abstract

This application relates to the field of power grid planning technology and provides a method, apparatus, equipment, and medium for determining the capacity and location of substations. The method includes: First, collecting load data of each user in the area to be planned; Second, dividing the reasonable power supply range of existing substations based on the load data of each user in the area to be planned and preset constraints; users within the reasonable power supply range are powered by existing substations, including existing users and planned users; Third, matching the site capacity to existing users and planned users outside the reasonable power supply range, and planning the location of substations based on the site capacity; Fourth, merging the planned substations and existing substations to obtain new existing substations; Fifth, repeating steps two through four for the new existing substations until no new planned substations are needed. This application can achieve the site selection and capacity determination of substations and distribution stations while minimizing the construction and operation costs of low-voltage lines.

Description

Technical Field

[0001] This application relates to the field of power grid planning technology, and in particular to a method for determining the capacity and layout of substations, a device for determining the capacity and layout of substations, a corresponding electronic device, and a corresponding computer-readable storage medium. Background Technology

[0002] With urban development, the electricity load continues to grow and its distribution becomes increasingly complex. The rational layout of substations and distribution stations (hereinafter referred to as substations and distribution stations) has become a key link in ensuring the reliability and economy of power supply.

[0003] In related technologies, the distribution of substations is often limited or lacks systematic consideration of low-voltage load distribution. Substation layout is usually guided by heavy overload and based on ease of construction, resulting in a mismatch between the actual site selection and the load being supplied. This requires the construction of longer low-voltage lines to achieve the planned goals, which not only wastes fixed asset investment but also increases operational losses. Summary of the Invention

[0004] This application provides a method, apparatus, equipment, and medium for determining the capacity and layout of substations and distribution stations, which can realize the site selection and capacity determination of substations and distribution stations based on a reasonable power supply range while minimizing the construction and operation costs of low-voltage side lines.

[0005] In one aspect, this application provides a method for determining the capacity and location of substations, the method comprising:

[0006] The first step is to collect load data from each user within the area to be planned;

[0007] The second step is to divide the reasonable power supply range of the existing substation based on the load data of each user in the area to be planned and the preset constraints. Users within the reasonable power supply range are powered by the existing substation. The users include existing users and planned users. The preset constraints include the substation low-voltage side load constraints and the power supply radius constraints. The substation low-voltage side load constraints are used to indicate that the load on the substation low-voltage side does not exceed a preset first threshold, and the power supply radius constraints are used to indicate that the power supply radius of the substation does not exceed a preset second threshold.

[0008] The third step is to match the site capacity with the existing users and planned users who are outside the reasonable power supply range, and to plan the site layout based on the site capacity.

[0009] Step 4: Merge the planned station and the existing station to obtain a new existing station;

[0010] Step 5: Repeat steps 2 to 4 above for the new existing stations until no new planned stations are needed.

[0011] In some embodiments of this application, the load data includes load location and load size; the step of dividing the reasonable power supply range of the existing substation based on the load data of each user in the area to be planned and preset constraints includes:

[0012] Calculate the power supply distance from each user to each existing substation based on the load location of each user;

[0013] Based on the power supply distance, the nearest existing station to each user is obtained, and the nearest user set of each existing station is obtained;

[0014] For each existing substation, the users in the nearest user set are sorted from nearest to farthest according to the power supply distance, and the users in the nearest user set are divided in the order of sorting until the load size or load location of the divided users does not meet one of the preset constraints. The range including all divided users is then taken as the reasonable power supply range of the existing substation.

[0015] In some embodiments of this application, during the user partitioning process, when the load size or load location of the partitioned users does not meet one of the preset constraints, the method further includes:

[0016] For the target existing station that meets the power supply radius constraint and still meets the station low-voltage side load constraint, and for the undivided users in the nearest user set, continue to execute the steps of calculating the power supply distance from the undivided users to the target existing station, screening existing stations for the undivided users, and dividing users for the undivided users, until no new users are divided.

[0017] In some embodiments of this application, the load size is used to calculate the load on the low-voltage side of the station; the load location is used to determine the power supply radius, the power supply radius is used to indicate the longest power supply distance from the current station to the load, and the power supply distance is the line length from the station to a certain user.

[0018] In some embodiments of this application, the reasonable power supply range includes an optimal power supply range and a safe power supply range; wherein, the preset first threshold set for the optimal power supply range and the preset first threshold set for the safe power supply range are different; the preset second threshold set for the optimal power supply range and the preset second threshold set for the safe power supply range are different.

[0019] In some embodiments of this application, the step of matching site capacity with existing and planned users outside the reasonable power supply range, and planning the site layout based on the site capacity, includes:

[0020] The existing and planned users outside the reasonable power supply range are initially grouped to form several load clusters;

[0021] Calculate the total load size of each load cluster and match the site capacity according to the total load size of each load cluster;

[0022] The site layout for each load cluster is planned based on the site capacity of each load cluster.

[0023] In some embodiments of this application, the step of planning the site deployment for each load cluster based on the site capacity of each load cluster includes:

[0024] If the site capacity of a certain load cluster is less than the preset capacity threshold, then no site deployment will be planned for that load cluster.

[0025] If the site capacity of a certain load cluster is greater than or equal to the preset capacity threshold, the number of sites shall be determined according to the capacity range in which the site capacity of the load cluster is located.

[0026] If the number of deployment points of a certain load cluster is greater than or equal to 2, then the load cluster is divided into a corresponding number of sub-load clusters according to the number of deployment points.

[0027] The load weighting center of each load point in the sub-load cluster is used as the location of the planned station, and the planned stations are deployed according to the location.

[0028] In some embodiments of this application, the users include medium-voltage users and low-voltage users; wherein, the medium-voltage users correspond to the power station planning, and the low-voltage users correspond to the distribution station planning.

[0029] On the other hand, this application provides a device for determining the capacity and layout of a substation, the device comprising:

[0030] The load data acquisition module is used to collect load data from each user within the area to be planned.

[0031] A reasonable power supply range division module is used to divide the reasonable power supply range of the existing station based on the load data of each user in the area to be planned and preset constraints. Users within the reasonable power supply range are powered by the existing station. The users include existing users and planned users. The preset constraints include station low-voltage side load constraints and power supply radius constraints. The station low-voltage side load constraints are used to indicate that the load on the station low-voltage side does not exceed a preset first threshold, and the power supply radius constraints are used to indicate that the power supply radius of the station does not exceed a preset second threshold.

[0032] The capacity determination and site deployment module is used to match site capacity with existing and planned users outside the reasonable power supply range, and to plan the site deployment based on the site capacity.

[0033] The station merging module is used to merge the planned stations and the existing stations to obtain new existing stations;

[0034] The loop execution module is used to repeatedly perform the steps of reasonable power supply range division, site capacity matching, and site planning for the new existing stations until no new planned stations are needed.

[0035] In some embodiments of this application, the load data includes load location and load size; the reasonable power supply range division module includes:

[0036] The power supply distance calculation submodule is used to calculate the power supply distance from each user to each existing station based on the load location of each user.

[0037] The user set generation submodule is used to filter the current stations closest to each user based on the power supply distance, and obtain the nearest user set for each current station;

[0038] The user segmentation submodule is used to sort the users in the nearest user set according to the power supply distance from near to far for each of the existing stations, and to segment the users in the nearest user set in the order of sorting until the load size or load location of the segmented users does not meet one of the preset constraints during the user segmentation process.

[0039] The reasonable power supply range division submodule is used to define the range that includes all users who have been assigned as the reasonable power supply range of the current station.

[0040] In some embodiments of this application, during the user partitioning process, when the load size or load location of the partitioned user does not meet one of the preset constraints, the user partitioning submodule is further configured to continue to perform the following steps for the target existing station that meets the power supply radius constraint and still meets the station low-voltage side load constraint, and the unpartitioned users in the nearest user set: calculating the power supply distance from the unpartitioned user to the target existing station, filtering the existing station for the unpartitioned user, and partitioning the user for the unpartitioned user, until no new user is partitioned.

[0041] In some embodiments of this application, the load size is used to calculate the load on the low-voltage side of the station; the load location is used to determine the power supply radius, and the power supply radius is used to indicate the longest power supply distance from the current station to the load, where the power supply distance is the line length from the station to a user.

[0042] In some embodiments of this application, the reasonable power supply range includes an optimal power supply range and a safe power supply range; wherein, the preset first threshold set for the optimal power supply range and the preset first threshold set for the safe power supply range are different; the preset second threshold set for the optimal power supply range and the preset second threshold set for the safe power supply range are different.

[0043] In some embodiments of this application, the volume control and point placement module includes:

[0044] The site capacity matching submodule is used to initially group existing and planned users outside the reasonable power supply range to form several load clusters; calculate the total load size of each load cluster, and match the site capacity according to the total load size of each load cluster;

[0045] The site deployment submodule is used to plan the site deployment for each load cluster based on the site capacity of each load cluster.

[0046] In some embodiments of this application, the placement submodule includes:

[0047] The site deployment quantity unit is used to determine the number of sites to be deployed when the site capacity of a load cluster is less than a preset capacity threshold, and to determine the number of sites to be deployed according to the capacity range in which the site capacity of the load cluster is located when the site capacity of a load cluster is greater than or equal to the preset capacity threshold.

[0048] The deployment unit is used to divide a load cluster into a corresponding number of sub-load clusters when the number of deployment points of a certain load cluster is greater than or equal to 2; and to deploy the planned stations according to the load weighting center of each load point in the sub-load cluster as the deployment location of the planned station.

[0049] In some embodiments of this application, the users include medium-voltage users and low-voltage users; wherein, the medium-voltage users correspond to the power station planning, and the low-voltage users correspond to the distribution station planning.

[0050] In another aspect, this application also provides an electronic device, including: a processor, a memory, and a computer program stored in the memory and capable of running on the processor, wherein the computer program, when executed by the processor, implements the substation capacity determination and layout planning method described in any one of the claims.

[0051] In another aspect, this application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the method for determining the capacity and layout of substations as described in any one of the claims.

[0052] In another aspect, this application also provides a computer program product containing instructions that, when run on a computer, cause the computer to execute the substation capacity and layout planning methods described in the above aspects.

[0053] The method, apparatus, equipment, and medium for determining the capacity and layout of substations provided in this application collect load data from each user within the planned area. Based on the load data and preset constraints, the reasonable power supply range of the existing substation is divided. Existing and planned users within the reasonable power supply range are powered by the existing substation. For existing and planned users outside the reasonable power supply range, the substation capacity can be matched, and the planned substation layout can be performed based on the substation capacity. Then, the planned substation and the existing substation are merged to obtain a new existing substation. The steps of dividing the reasonable power supply range, matching the substation capacity, and planning the substation layout are repeated for the new existing substation until no new planned substation is needed. The preset constraints may include load constraints on the low-voltage side of the substation and power supply radius constraints. The load constraints on the low-voltage side of the substation can be used to indicate that the load on the low-voltage side of the substation does not exceed a preset first threshold, and the power supply radius constraints can be used to indicate that the power supply radius of the substation does not exceed a preset second threshold. By assuming that existing substations are already or will supply power within a reasonable range, and that newly planned substations are intended to supply power to loads outside this reasonable range, the planned and existing substations are merged to form a new existing substation. This process of dividing the reasonable power supply range, matching substation capacity, and planning substation locations is repeated until no new planned substations are needed. This ensures that loads are within the reasonable power supply range, allowing for the deployment of planned substations while maintaining power supply within this range, thus ensuring the safe and stable operation of the power grid. Furthermore, since the deployment of new planned substations is based on supplying power within the reasonable power supply range, and low-voltage side load constraints within this range indicate that the load on the low-voltage side does not exceed a preset first threshold, and power supply radius constraints indicate that the power supply radius does not exceed a preset second threshold, this allows for supplying power to the maximum number of loads with the shortest distance. This minimizes the construction and operating costs of low-voltage lines, enabling the selection and capacity determination of substations and distribution stations. Attached Figure Description

[0054] Figure 1 This is a flowchart illustrating the steps of a substation capacity determination and layout planning method provided in an embodiment of this application.

[0055] Figure 2 This is a schematic diagram illustrating an optimal power supply range provided in an embodiment of this application;

[0056] Figure 3 This is a structural block diagram of a substation capacity control and layout planning device provided in an embodiment of this application;

[0057] Figure 4 This is a structural block diagram of an electronic device provided in an embodiment of this application;

[0058] Figure 5 This is a structural block diagram of a computer-readable storage medium provided in an embodiment of this application. Detailed Implementation

[0059] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0060] Different substation locations will significantly affect the construction and operation costs of low-voltage lines. Ideally, substations should be located in load centers. Regarding the determination of load centers, especially when existing substations already exist in the area, this application's embodiments, based on a reasonable power supply range, achieve the site selection and capacity determination of 110kV substations and 10kV distribution stations while minimizing the construction and operation costs of low-voltage lines.

[0061] In this embodiment, the goal is to supply power to the largest number of loads with the shortest distance, and site planning is based solely on source-load relationships. This approach is not affected by unreasonable existing power supply ranges and proposes requirements for coordinated planning of sites and low-voltage side lines; this approach does not set targets for the number or capacity of newly built sites, and can reflect the actual needs of the power grid; this approach does not artificially divide power supply grids or units, and can reduce the impact of subjective factors on the planning results.

[0062] Specifically, the reasonable power supply range includes two standards: the optimal power supply range and the safe power supply range, corresponding to the high and low schemes of the plan, respectively. Defining the reasonable power supply range for existing substations ensures the safe and stable operation of the low-voltage power grid while minimizing the construction cost and operating losses of the power supply lines. This is a shared vision for the planning and operation of high, medium, and low-voltage distribution networks. For existing substations that are not supplying power within the reasonable range, this application embodiment can gradually modify the lines to achieve a reasonable state. Specifically, when planning substations, this application embodiment can assume that existing substations are already or will be supplying power within the reasonable range. The main purpose of newly planned substations is to supply power to loads outside the reasonable power supply range, ensuring that all loads are within the reasonable power supply range as much as possible.

[0063] Reference Figure 1 This document illustrates a flowchart of the steps involved in a method for determining the capacity and location of a substation according to an embodiment of this application. Specifically, the method may include the following steps:

[0064] Step S101: Collect load data of each user in the area to be planned.

[0065] The area to be planned refers to the area where there is a need for the planning of substations and distribution stations. Optionally, this area can include existing stations and planned stations. Existing stations can refer to substations and distribution stations that already exist before the new planned stations, while planned stations can refer to newly planned substations and distribution stations. Substations and distribution stations can be collectively referred to as stations.

[0066] In practical applications, distribution stations are divided into existing distribution stations and planned distribution stations. Existing distribution stations refer to existing 10kV distribution transformers, while planned distribution stations refer to planned 10kV distribution transformers. Substations are divided into existing substations and planned substations. Existing substations refer to existing 110kV and 220kV substations, while planned substations refer to planned 110kV substations.

[0067] In some embodiments of this application, load data of various users within the area to be planned can be collected. The users collected can include existing users and planned users, that is, load data of existing users and planned users can be collected to understand the overall load situation of the area to be planned. Among them, existing users refer to users who already exist, are connected to the power grid, and are actually using electricity; planned users refer to users who are planned to be built in the future, but have not yet been built and put into operation, and have not yet actually used electricity.

[0068] In practical applications, the collected load data can include the load location and load size of users, enabling accurate understanding of the load distribution and load demand of users within a region, providing reliable data support for distribution network site planning. Specifically, the load location of a user refers to the specific access node, installation location, distribution area, or coordinate location of each user's load within the power supply system, distribution network, monitoring area, or spatial topology. This is the access point or spatial location of each user's load within the system, which can be used to identify the spatial or topological affiliation of that user's load within the system. The load size of a user refers to the actual power, current, electrical energy, demand, or other physical quantities characterizing load intensity consumed or generated by each user at a specific moment or time period. This is the quantified value of the load power, current, or demand corresponding to each user, which can be used to quantify the size and degree of change of that user's load.

[0069] In some embodiments of this application, the load size can be used to calculate the load on the low-voltage side of the station; the load location can be used to calculate the power supply radius, which indicates the longest power supply distance from the current station to the load. The power supply distance refers to the line length from the station to a user, rather than the straight-line distance.

[0070] Optionally, the load size of existing users can be obtained by using the maximum cross-sectional load of the current year and considering the natural growth rate; the load size of planned users can be determined by collecting electricity demand data. For areas with readily available resources, such as those where cable and overhead line channels are clearly defined, the shortest path algorithm can be used to determine the power supply distance; for areas without such resources, an approximate calculation method using the straight-line distance multiplied by a linear coefficient can be used to calculate the power supply distance. This application does not impose any limitations on this.

[0071] It should be noted that the capacity and location planning of substations involves the capacity and location planning of both substations and distribution stations. In some embodiments of this application, medium-voltage users and low-voltage users can be simply referred to as "users," where medium-voltage users correspond to substation planning, and low-voltage users correspond to distribution station planning. In practical applications, load data of medium-voltage users (including existing and planned medium-voltage users) in the area to be planned can be collected for the capacity and location planning of substations, and load data of low-voltage users (including existing and planned low-voltage users) in the area to be planned can be collected for the capacity and location planning of distribution stations.

[0072] Step S102: Based on the load data of each user in the area to be planned and the preset constraints, the reasonable power supply range of the existing substation is divided.

[0073] In the planning of this application, it is assumed that the existing station has or will be supplied with power within a reasonable range. The main purpose of the newly planned station is to supply power to loads that are not within the reasonable power supply range, so as to ensure that the loads are within the reasonable power supply range as much as possible.

[0074] After collecting load data for existing and planned medium-voltage users within the planning area, as well as load data for existing and planned low-voltage users, this embodiment of the application can calculate the reasonable power supply range of the existing substation in order to determine the loads not within the reasonable power supply range. Specifically, the reasonable power supply range of the existing substation can be divided based on the collected relevant data and preset constraints. It should be noted that whether the existing / planned users are within the reasonable power supply range of the existing substation or outside the reasonable power supply range, the only difference is the location of the user; the definitions of existing and planned users are the same.

[0075] With the goal of supplying power to the largest load in the shortest distance, in some embodiments of this application, step S102 may specifically include the following sub-steps:

[0076] Sub-step S21: Calculate the power supply distance from each user to each existing substation based on the load location of each user;

[0077] Sub-step S22: Based on the power supply distance, filter to obtain the current station closest to each user, and obtain the set of the nearest users for each current station;

[0078] Sub-step S23: For each existing station, the users in the nearest user set can be sorted from near to far according to the power supply distance, and the users in the nearest user set can be divided into corresponding existing stations in turn according to the sorting, until the load size or load location of the divided users does not meet one of the preset constraints during the user division process.

[0079] Sub-step S24: The range including all already divided users is taken as the reasonable power supply range of the current station.

[0080] Specifically, the reasonable power supply range of a substation can include two standards: the optimal power supply range and the safe power supply range. The optimal power supply range requires that the operation have an appropriate margin, shorter line lengths, and the ability to cope with extreme situations such as sudden load increases; the safe power supply range requires that the power grid can operate safely and stably with qualified voltage quality, but the entire power grid is in a tight balance and has low operational flexibility.

[0081] It should be noted that the different standards correspond to the high and low schemes in the planning, respectively. It should also be noted that the planning process for both power supply areas is the same, only the constraints differ.

[0082] Optionally, the preset constraints may include low-voltage side load constraints and power supply radius constraints. The low-voltage side load constraints are mainly used to indicate that the load on the low-voltage side of the station does not exceed a preset first threshold; the power supply radius constraints are mainly used to indicate that the power supply radius of the station does not exceed a preset second threshold.

[0083] Among them, the preset first threshold set for the optimal power supply range and the preset first threshold set for the safe power supply range are different, and the preset second threshold set for the optimal power supply range and the preset second threshold set for the safe power supply range are different.

[0084] For example, the optimal power supply range of a substation is required to meet the following two preset constraints: 1) The load on the low-voltage side of the substation does not exceed the recommended value, i.e., the preset first threshold. For example, the load rate of a non-220kV substation is less than 60%, and the load of a single main transformer in a 220kV substation does not exceed 20MW. 2) The power supply radius of the substation does not exceed the recommended value, i.e., the preset second threshold. This preset second threshold can be determined according to the power grid planning technical guidelines of a certain region. For example, for substations, the power supply radius in A+ and A-class areas should not exceed 3km, and in B-class areas it should not exceed 5km; for distribution substations, the power supply radius in A+ and A-class areas should not exceed 150m, and in B-class areas it should not exceed 250m. This application embodiment does not impose any limitations on this.

[0085] The safe power supply range of the substation must meet the following two preset constraints: 1) The load on the low-voltage side of the substation does not exceed the limit, i.e., the preset first threshold. For example, for a 110kV substation, it is required to meet N-1, where N-1 is a special term in the power industry and N has no special meaning. Meeting N-1 is an abbreviation for "meeting the N-1 safety criterion". In the embodiments of this application, it means that if one main transformer of the substation is out of service, other main transformers in the substation can supply power to all loads and no main transformer load rate exceeds the safety limit. For a substation with two main transformers, the maximum load rate is required to not exceed 65%. For a substation with three main transformers, the load rate is required to not exceed 87%. For a distribution substation, no heavy overload is required, i.e., the load rate is required to not exceed 80%. For a 220kV substation, the 10kV load supplied by a single main transformer is required to not exceed 25MW. 2) The power supply radius of the substation does not exceed the limit, i.e., a preset second threshold. The preset second threshold can be determined according to the power grid planning technical guidelines of a certain region. For example, for substations, the power supply radius in A+ and A-class areas should not exceed 5km, and the power supply radius in B-class areas should not exceed 8km; for distribution stations, the power supply radius in A+ and A-class areas should not exceed 400m, and the power supply radius in B-class areas should not exceed 500m. This application does not impose any restrictions on this.

[0086] Provided the above conditions are met, the stations supply power to users in order of distance from the nearest to the farthest station, with priority given to users who are supplied by the nearest station.

[0087] Reference Figure 2 The diagram illustrates an optimal power supply range provided by an embodiment of this application.

[0088] like Figure 2 As shown, assume there are three existing substations (substation A, substation B, and substation C). Small dots represent users. The plane is divided into three equal parts by bisectors. Users within a given substation's part are closer to that substation than to any other substation. For example, users within substation A's part are closer to substation A than to substation B or C; users within substation B's part are closer to substation B than to substation A or C; and users within substation C's part are closer to substation C than to substation A or B. In other words, users within substation A's part are the closest set of users to substation A; users within substation B's part are the closest set of users to substation B; and users within substation C's part are the closest set of users to substation C.

[0089] It should be noted that the loads on the dividing line are equidistant from the two substations. The load on one side of the dividing line is definitely closer to a certain substation. The division of the dividing line is to determine which loads are closer to a certain substation than to other substations. Other methods can also be used to determine the nearest user set of a certain existing substation. This application does not limit this.

[0090] Optionally, during the process of dividing users in the nearest user set in order of sorting, if the load size or load location of the divided users does not meet one of the preset constraints, the division of users can be stopped and a reasonable power supply range division operation can be triggered. Specifically, the range including all divided users is taken as the reasonable power supply range of the current station.

[0091] For example, such as Figure 2 As shown, substations supply power to users from near to far (using straight-line distance as an example, but actually the line length). This can be represented as each substation initially supplying power to users on its own side of the equally spaced line until one of two constraints is triggered. For example, user allocation stops when the load rate exceeds 60%, or user allocation stops when the power supply radius exceeds 3km. At this point, the optimal power supply range for substation A can be defined as the area including all users allocated to substation A, the optimal power supply range for substation B can be defined as the area including all users allocated to substation B, and the optimal power supply range for substation C can be defined as the area including all users allocated to substation C.

[0092] In some embodiments of this application, when sequentially assigning users to the power supply range in sub-step S23 until one of the preset constraints is no longer met, the following steps can be continuously executed for the target existing station that meets both the power supply radius constraint and the station's low-voltage side load constraint, as well as the unassigned users in the nearest user set: calculating the power supply distance from the unassigned users to the target existing station (refer to sub-step S21), filtering existing stations for unassigned users (refer to sub-step S22), and assigning users for unassigned users (refer to sub-step S23), until no new users are assigned. That is, in the subsequent calculation of the reasonable power supply range of the existing station, existing stations that do not meet the station's low-voltage side load constraint and their supplied users are not considered; for the target existing station that meets both the power supply radius constraint and the station's low-voltage side load constraint, as well as the previously unassigned users, the relevant calculations for the reasonable power supply range will continue. For example, assuming a maximum load rate of 60% and a maximum power supply radius of 3km are required, existing stations that meet the power supply radius constraint and the station's low-voltage side load constraint can be, for example, Figure 2The diagram shows substations B and C (both with a load rate not exceeding 60%) with a power supply radius of 3km, and substation A (with a load rate of 60%) with a power supply radius not exceeding 3km. It should be noted that in practical applications, only existing substations are screened and users are assigned to unassigned users. Users supplied by the target existing substation are already fixedly assigned to the target existing substation by default; the original loads will not be assigned elsewhere.

[0093] In this embodiment, the reasonable power supply range of the existing station is divided based on user load data and the low-voltage side load constraints and power supply radius constraints. Under the premise of ensuring that the station does not exceed its capacity and the power supply radius is compliant, the power supply capacity of the existing station can be fully utilized and the utilization rate of existing resources can be improved.

[0094] Step S103: Match site capacity to existing users and planned users outside the reasonable power supply range, and plan the site layout based on the site capacity.

[0095] Existing and planned users within the reasonable power supply range are supplied by the existing substations. For existing substations that are not supplied within the reasonable range, i.e., users still outside the reasonable power supply range (such as…),… Figure 2 For users outside the power supply range of the substation in the application, the embodiments of this application can gradually modify the line to achieve a reasonable state. Specifically, new site planning can be carried out, which involves first performing preliminary grouping, then estimating capacity demand, and finally determining the location of the planned stations after fine grouping, so as to realize the station capacity and layout planning, and to provide power to users outside the reasonable power supply range based on the planned stations.

[0096] It should be noted that the station capacity determination and site layout planning can be calculated using various algorithms, such as greedy algorithms, clustering algorithms, genetic algorithms, particle swarm optimization, and ant colony optimization. This application's embodiments use clustering algorithms as an example for illustration.

[0097] In some embodiments of this application, the implementation of preliminary grouping is specifically manifested in the use of density clustering algorithms (such as Density-Based Spatial Clustering of Applications with Noise, or DBSCAN for short, a density-based spatial clustering application algorithm with noise) to initially group existing users and planned users outside the reasonable power supply range, forming several load clusters; the implementation of capacity demand estimation is specifically manifested in the calculation of the total load size of each load cluster, matching the site capacity according to the total load size of each load cluster, so that the load matches the transformer capacity and ensures equipment utilization.

[0098] In the process of planning the deployment of stations for each load cluster based on the station capacity of each load cluster, the implementation of fine grouping is specifically manifested in two ways: in one case, if the station capacity of a certain load cluster is less than a preset capacity threshold, then no station deployment is planned for that load cluster; in another case, if the station capacity of a certain load cluster is greater than or equal to the preset capacity threshold, then the number of stations can be determined according to the capacity range in which the station capacity of that load cluster is located.

[0099] Optionally, if the number of distribution points of a certain load cluster is greater than or equal to 2, a partitioning clustering algorithm (such as the K-means algorithm) can be used to divide the load cluster into a corresponding number of sub-load clusters according to the number of distribution points, so as to further subdivide it into a corresponding number of sub-clusters; then the distribution point locations can be determined. Specifically, for each finally determined sub-load cluster, the load weighting center of each load point in the sub-load cluster can be used as the distribution point location of the planning station, so that the power supply distance of large load points is shorter, and then the planning station is distributed according to the distribution point location.

[0100] For example, for a certain substation, if the cluster load is less than 16MW, no substation needs to be installed; if the cluster load is 16MW-25MW, the planning station can choose one 40MVA*2 type substation, i.e., one installation point, with two main transformers in each installation point, each with a capacity of 40MVA; if the cluster load is 25MW-60MW, the planning station can choose one 63MVA*2 type substation, i.e., one installation point, with two main transformers in each installation point, each with a capacity of 63MVA; if the cluster load is greater than 60MW, the planning station can plan two 63MVA*2 type substations, i.e., two installation points, with two main transformers in each installation point, each with a capacity of 63MVA. This application does not impose any limitations on this.

[0101] It should be noted that, without the deployment of substations, for users within the load cluster located outside the reasonable power supply range, the upper limit of the preset second threshold set in the power supply radius constraint can be adjusted within the allowable range, provided that the load on the low-voltage side of the substation does not exceed the preset first threshold. This allows one or more users outside the reasonable power supply range to be assigned to the corresponding existing substation. The specific allowable range can be set based on actual needs, and this application embodiment does not impose any restrictions on it.

[0102] In this embodiment of the application, matching the site capacity with existing users and planned users outside the reasonable power supply range and planning the site layout can accurately fill the power supply gap, achieve a reasonable match between load and site capacity, and avoid redundant site construction or insufficient power supply capacity.

[0103] Step S104: Merge the planned station and the existing station to obtain a new existing station.

[0104] Step S105: Repeat steps S102 to S104 for the new existing stations until no new planned stations are needed.

[0105] After planning the planned stations according to their locations, the planned stations and existing stations can be merged, and the merged station becomes the latest existing station. Steps S102 to S104 are repeated until no new locations are needed. This achieves the site selection and capacity determination of substations and distribution stations while minimizing the construction and operation costs of low-voltage lines. The locations are determined based on the planned stations. New planned stations added according to the locations can be merged with existing stations to form a new existing station. The absence of new locations indicates that no new planned stations are needed. It should be noted that the determination of whether to add new locations can refer to step S103. Specifically, if the site capacity of a load cluster is less than a preset capacity threshold, no planned stations are planned for that load cluster. This embodiment will not elaborate further here.

[0106] In this embodiment of the application, by merging the planned station and the existing station to form a new existing station, and iteratively executing the steps of dividing the power supply range and station layout, dynamic optimization and load balancing of the power supply area can be achieved, making the station layout more scientific and reasonable, improving the power supply reliability and power supply quality of the entire area to be planned, while reducing planning costs and the difficulty of later operation and maintenance.

[0107] It should be noted that the planning stations in step S103 above can only theoretically supply grouped loads. To avoid the planning stations only being based on theoretical power supply capacity matching but not on actual power supply constraints, the power supply range can be divided again to verify and correct the planning results.

[0108] Specifically, the planned stations obtained from the theoretical site layout in step S103 can be combined with the existing existing stations in the area to be planned to form a set of stations to be verified. This set serves as the overall power supply entity, covering all existing and planned users in the area to be planned. Then, based on the collected load location and load size of each user, and with the mandatory constraints that the low-voltage side load of the station does not exceed a preset first threshold and the power supply radius does not exceed a preset second threshold, the power supply range of the above-mentioned set of stations to be verified is re-divided. For example, each existing and planned station is assigned a corresponding power supply user to ensure that the same user belongs to the power supply range of only one station, making the power supply area of ​​each station continuous and the load allocation clear. At this time, the actual power supply range after the division can be verified and judged, such as capacity verification, power supply radius verification, and coverage integrity verification.

[0109] Optionally, capacity verification can be performed by determining whether the total load of all users within the power supply range of the planned station meets the load constraints of the station's low-voltage side, i.e., the total load does not exceed a preset first threshold; power supply radius verification can be performed by determining whether the farthest power supply distance from the planned station to each user within its power supply range meets the power supply radius constraints, i.e., it does not exceed a preset second threshold; coverage integrity verification can be performed by determining whether all existing users and planned users in the area to be planned are included in the power supply range of a certain station, with no power supply blind spots and no user omissions.

[0110] Finally, the planned stations can be corrected and adjusted based on the verification results. For example, if a planned station is overcapacitated, its station capacity can be increased, or its power supply range can be split, and new planned stations can be added in areas with high load density. If a planned station exceeds its power supply radius, its location can be adjusted to be closer to the load center, or its power supply range can be reduced. If there are still users not covered, load aggregation and capacity matching can be performed again for these users, and additional stations can be added.

[0111] Optionally, if, after verification, all planned stations and existing stations meet the load constraints and power supply radius constraints, and achieve full user coverage, then the planning of station locations and the division of power supply range can be confirmed as valid, and the subsequent station merging and iteration process can proceed. If the verification fails, the above division, verification, and adjustment steps can be repeated until the theoretical layout of the planned stations fully meets the actual power supply constraints, thereby improving the accuracy, reliability, and feasibility of the planning results.

[0112] This application does not limit the scope of the embodiments.

[0113] In this embodiment, load data of each user within the planned area is collected. Based on the load data of each user within the planned area and preset constraints, the reasonable power supply range of the existing substation is divided. Existing users and planned users within the reasonable power supply range are powered by the existing substation. For existing users and planned users outside the reasonable power supply range, the substation capacity can be matched and the planned substations can be deployed based on the substation capacity. Then, the planned substations and existing substations are merged to obtain a new existing substation. The steps of dividing the reasonable power supply range, matching the substation capacity, and deploying the planned substations are repeated for the new existing substations until no new planned substations are needed. The preset constraints may include load constraints on the low-voltage side of the substation and power supply radius constraints. The load constraints on the low-voltage side of the substation can be used to indicate that the load on the low-voltage side of the substation does not exceed a preset first threshold, and the power supply radius constraints can be used to indicate that the power supply radius of the substation does not exceed a preset second threshold. By assuming that existing substations are already or will supply power within a reasonable range, and that newly planned substations are intended to supply power to loads outside this reasonable range, the planned and existing substations are merged to form a new existing substation. This process of dividing the reasonable power supply range, matching substation capacity, and planning substation locations is repeated until no new planned substations are needed. This ensures that loads are within the reasonable power supply range, allowing for the deployment of planned substations while maintaining power supply within this range, thus ensuring the safe and stable operation of the power grid. Furthermore, since the deployment of new planned substations is based on supplying power within the reasonable power supply range, and low-voltage side load constraints within this range indicate that the load on the low-voltage side does not exceed a preset first threshold, and power supply radius constraints indicate that the power supply radius does not exceed a preset second threshold, this allows for supplying power to the maximum number of loads with the shortest distance. This minimizes the construction and operating costs of low-voltage lines, enabling the selection and capacity determination of substations and distribution stations.

[0114] It should be noted that, for the sake of simplicity, the method embodiments are all described as a series of actions. However, those skilled in the art should understand that the embodiments of this application are not limited to the described order of actions, because according to the embodiments of this application, some steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also understand that the embodiments described in the specification are all preferred embodiments, and the actions involved are not necessarily required by the embodiments of this application.

[0115] Reference Figure 3 This diagram illustrates a structural block diagram of a substation capacity determination and layout planning device according to an embodiment of this application, which may specifically include the following modules:

[0116] The load data acquisition module 301 is used to collect load data from each user in the area to be planned.

[0117] The reasonable power supply range division module 302 is used to divide the reasonable power supply range of the existing station based on the load data of each user in the area to be planned and preset constraints. Users within the reasonable power supply range are powered by the existing station. Users include existing users and planned users. The preset constraints include the station's low-voltage side load constraints and the power supply radius constraints. The station's low-voltage side load constraints are used to indicate that the load on the station's low-voltage side does not exceed a preset first threshold, and the power supply radius constraints are used to indicate that the station's power supply radius does not exceed a preset second threshold.

[0118] The capacity determination and site deployment module 303 is used to match site capacity for existing users and planned users outside the reasonable power supply range, and to plan the site deployment based on the site capacity.

[0119] The station merging module 304 is used to merge planned stations and existing stations to obtain new existing stations;

[0120] The loop execution module 305 is used to repeatedly perform the steps of reasonable power supply range division, site capacity matching, and site planning for new existing stations until no new planned stations are needed.

[0121] In this embodiment, the load data acquisition module 301 collects load data from various users within the planned area, accurately grasping the load distribution and load demand of users within the area, providing reliable data support for distribution network site planning. The reasonable power supply range division module 302, based on user load data and low-voltage side load constraints and power supply radius constraints, divides the reasonable power supply range of existing stations. This ensures that stations do not exceed capacity and that the power supply radius complies with regulations, fully utilizing the existing station power supply capacity and improving the utilization rate of existing resources. The capacity determination and site layout module 303 matches station capacity with existing and planned users outside the reasonable power supply range and plans station layout accordingly. This accurately fills power supply gaps, achieving a reasonable match between load and station capacity, avoiding redundant station construction or insufficient power supply capacity. The station merging module 304 and the iterative execution module 305 merge planned stations with existing stations to form new existing stations and iteratively execute the power supply range division and site layout steps. This enables dynamic optimization and balanced load distribution of the power supply area, making the site layout more scientific and reasonable, improving the power supply reliability and quality of the entire planned area, while reducing planning costs and subsequent operation and maintenance difficulties.

[0122] In some embodiments of this application, the load data includes load location and load size; the reasonable power supply range division module 302 may include the following sub-modules:

[0123] The power supply distance calculation submodule is used to calculate the power supply distance from each user to each existing station based on the load location of each user.

[0124] The user set generation submodule is used to filter the current stations closest to each user based on the power supply distance, and obtain the nearest user set for each current station;

[0125] The user partitioning submodule is used to sort the users in the nearest user set according to the power supply distance from the nearest to the farthest for each existing station, and then partition the users in the nearest user set in the sorting order until the load size or load location of the partitioned users does not meet one of the preset constraints during the user partitioning process.

[0126] The reasonable power supply range division submodule is used to define the range that includes all users who have been assigned as the reasonable power supply range for the current station.

[0127] In this embodiment, the user set generation submodule calculates the power supply distance from each user to each existing substation based on the load location of each user. This accurately obtains the spatial correspondence between users and existing substations, providing an objective and accurate spatial data basis for power supply range division. The user division submodule filters out the existing substations closest to each user based on the power supply distance and forms the nearest user set. Strictly adhering to the principle of power supply from the nearest location, this ensures that the power supply radius is controllable from the source, which is beneficial for reducing line losses, improving power supply voltage quality, and sorting the nearest users of each existing substation from near to far according to the power supply distance. Users are then divided sequentially until the preset constraints related to load size or load location are no longer met. This allows for the orderly and controllable allocation of power supply load to existing substations while prioritizing power supply to nearby users, avoiding problems such as overload on the low-voltage side of the substation and exceeding the power supply radius limit due to disordered user allocation. The reasonable power supply range division submodule determines the already divided user range that meets the constraints as the reasonable power supply range of the current station. This makes the power supply range division results more in line with actual operation constraints and more feasible for engineering. It effectively improves the accuracy and rationality of the power supply range division, realizes load balance distribution and optimized utilization of power supply resources, and provides a reliable basis for subsequent distribution network planning, site layout and iterative optimization.

[0128] In some embodiments of this application, during the user partitioning process, when the load size or load location of the partitioned user does not meet one of the preset constraints, the user partitioning submodule is further used to continue to perform the following steps for the target existing station that meets the power supply radius constraint and still meets the station low-voltage side load constraint, as well as the unpartitioned users in the nearest user set: calculating the power supply distance from the unpartitioned user to the target existing station, screening the existing station for the unpartitioned user, and partitioning the user for the unpartitioned user, until no new user is partitioned.

[0129] In this embodiment, the user partitioning unit adopts a step-by-step elimination and iterative partitioning approach. This approach prioritizes eliminating existing stations and their power supply users that do not meet the low-voltage side load constraints, significantly reducing redundant calculations and invalid traversals in subsequent partitioning processes and improving the execution efficiency of power supply range partitioning. Furthermore, during the user partitioning process, when the load size or load location of an already partitioned user does not meet one of the preset constraints, the power supply distance calculation, screening of existing stations for unpartitioned users, and user partitioning for unpartitioned users are repeatedly executed for target existing stations that meet both the power supply radius constraint and the low-voltage side load constraint, as well as for users that have not yet been partitioned. This enables round-by-round refined allocation and constraint verification of the remaining load, avoiding uneven load distribution, user omissions, or power supply blind spots caused by insufficient partitioning in a single instance. Moreover, by iteratively executing until no new users are partitioned, it ensures that all reasonably allocable users are included in the power supply range of the corresponding existing station. Under the premise of strictly meeting the low-voltage side load constraints of the station, the existing station power supply capacity is maximized, resulting in a more balanced load distribution and partitioning results that better match actual operating requirements, further improving the completeness, rationality, and engineering feasibility of power supply range partitioning.

[0130] In some embodiments of this application, the load size is used to calculate the load on the low-voltage side of the station; the load location is used to determine the power supply radius, which indicates the longest power supply distance from the current station to the load, and the power supply distance is the line length from the station to a user.

[0131] In this embodiment of the application, by explicitly using the load size for the calculation of the load on the low-voltage side of the station and the load location for the calculation of the power supply radius, and distinguishing the definition boundary between the power supply radius and the power supply distance, it is possible to achieve precise decoupling of load quantification indicators and spatial constraint indicators, avoid calculation deviations caused by mixed use of parameters, provide a standardized and unambiguous quantitative basis for the division of power supply range, and significantly improve the accuracy of constraint condition verification and the reliability of calculation results.

[0132] In some embodiments of this application, the reasonable power supply range includes the optimal power supply range and the safe power supply range; wherein, the preset first threshold set for the optimal power supply range and the preset first threshold set for the safe power supply range are different; the preset second threshold set for the optimal power supply range and the preset second threshold set for the safe power supply range are different.

[0133] In this embodiment, a hierarchical and differentiated power supply constraint system is constructed by dividing the reasonable power supply range into an optimal power supply range and a safe power supply range, and setting different preset thresholds for the low-voltage side load and power supply radius for each type of range. The threshold setting for the optimal power supply range can adapt to the ideal scenario of economical operation and low-loss power supply of the station, realizing the efficient utilization of existing power supply resources; the threshold setting for the safe power supply range serves as a safety net, adapting to special operating conditions such as peak load and emergency power supply, taking into account both the safety of power supply and the integrity of coverage. The design of dual ranges and differentiated thresholds allows the division of power supply ranges to no longer be limited to a single constraint standard, but can take into account the dual needs of power supply economy and operational safety, ensuring the optimal operating state of the existing station under normal operating conditions, and reserving safety redundancy for load fluctuations. At the same time, the result of hierarchical division can also provide a more refined decision-making basis for subsequent station planning, making the overall distribution network planning scheme both economical in engineering implementation and highly adaptable to complex actual operating scenarios.

[0134] In some embodiments of this application, the volume determination and point placement module 303 may include the following sub-modules:

[0135] The site capacity matching submodule is used to initially group existing and planned users outside the reasonable power supply range into several load clusters; calculate the total load size of each load cluster, and match the site capacity according to the total load size of each load cluster.

[0136] The site deployment submodule is used to plan the site deployment for each load cluster based on the site capacity of each load cluster.

[0137] In this embodiment, the site capacity matching submodule forms load clusters by initially grouping existing and planned users outside the reasonable power supply range. This centralizes and aggregates scattered loads, avoiding the cumbersome planning and site redundancy problems caused by independent placement of single loads, effectively simplifying the placement logic and improving the regularity of the load layout. Furthermore, by calculating the total load size of each load cluster and matching the corresponding site capacity, precise matching between regional load demand and site power supply capacity can be achieved. This prevents overcapacity operation due to insufficient site capacity and avoids equipment idleness and investment waste due to excessive capacity, significantly improving site capacity utilization and planning economy. The site placement submodule plans site placement based on load clusters and matching capacity, allowing planned sites to be located close to the load center, effectively shortening the power supply distance and controlling the power supply radius. This reduces line losses while improving power supply voltage quality, making the placement results more consistent with the actual load distribution, and significantly improving the scientificity, rationality, and engineering feasibility of distribution network planning.

[0138] In some embodiments of this application, the point placement submodule may include the following units:

[0139] The site deployment quantity unit is used to determine the number of sites to be deployed when the site capacity of a load cluster is less than a preset capacity threshold, and to determine the number of sites to be deployed according to the capacity range in which the site capacity of the load cluster is located when the site capacity of a load cluster is greater than or equal to the preset capacity threshold.

[0140] The deployment unit is used to divide a load cluster into a corresponding number of sub-load clusters when the number of deployment points of a certain load cluster is greater than or equal to 2; the load weighting center of each load point in the sub-load cluster is used as the deployment location of the planning station, and the planning station is deployed according to the deployment location.

[0141] In this embodiment, the site deployment unit sets a preset capacity threshold, and does not deploy planned sites for load clusters with site capacity less than the threshold. This avoids problems such as investment waste and low equipment utilization caused by building separate sites for scattered small loads. It effectively controls construction costs and improves the economic efficiency of the planning scheme while ensuring power supply coverage. For load clusters with site capacity reaching the threshold, the deployment number is determined according to the range of their capacity, which can achieve a fine match between load scale and deployment number. This avoids site overcapacity and power supply radius exceeding the standard due to too few deployments, or resource redundancy due to too many deployments, making the site configuration more in line with the actual load demand.

[0142] The deployment unit breaks down load clusters with ≥2 deployment points into a corresponding number of sub-load clusters. This avoids overloading of a single planned station and excessive power supply range, achieving balanced load distribution and reasonable division of power supply areas, reducing the operating pressure of a single station, and improving power supply safety and stability. Furthermore, by using the load weighting center of the sub-load cluster as the location of the planned station, the station can be precisely located close to the load center, minimizing power supply distance, reducing line losses, and improving voltage quality, making the deployment location more scientific and the planning results more feasible for engineering implementation.

[0143] In some embodiments of this application, users include medium-voltage users and low-voltage users; wherein, medium-voltage users correspond to substation planning, and low-voltage users correspond to distribution substation planning.

[0144] In this embodiment, by subdividing users into medium-voltage and low-voltage users and conducting substation and distribution station planning respectively, refined power grid planning by voltage level and hierarchy is achieved. This ensures precise matching between the planning object and the planning subject, effectively avoiding scheme deviations caused by mixing loads of different voltage levels using the same planning logic. Specifically, substation planning for medium-voltage users adapts to the power supply capacity requirements and characteristics of medium-voltage loads, ensuring the reliability and power supply capacity of the medium-voltage power grid. Distribution station planning for low-voltage users aligns with the scattered distribution and sensitivity to power supply radius of low-voltage loads, achieving reasonable division of the power supply range and optimized site layout on the low-voltage side. This hierarchical planning model can coordinate the layout of power grids of different voltage levels, improving the pertinence, rationality, and feasibility of the planning scheme. While optimizing the power grid structure, it also improves planning efficiency, providing solid support for the safe and efficient operation of the overall distribution network.

[0145] This application embodiment assumes that existing substations are already or will be supplying power within a reasonable range, and that newly planned substations are intended to supply power to loads outside the reasonable power supply range. The planned and existing substations are then merged to obtain a new existing substation. The steps of dividing the reasonable power supply range, matching substation capacity, and planning substation locations are repeated until no new planned substations are needed. This ensures that loads are within the reasonable power supply range, enabling the planning substations to be located while supplying power within the reasonable range, thus ensuring the safe and stable operation of the power grid. Furthermore, since the new planned substations are located with the goal of supplying power within the reasonable power supply range, and the low-voltage side load constraint condition for substations within the reasonable power supply range indicates that the load on the low-voltage side of the substation does not exceed a preset first threshold, and the power supply radius constraint condition indicates that the power supply radius of the substation does not exceed a preset second threshold, it is possible to supply power to the maximum number of loads with the shortest distance. This allows for the selection and capacity determination of substations and distribution stations while minimizing the construction and operation costs of low-voltage lines.

[0146] As the device embodiment is basically similar to the method embodiment, the description is relatively simple, and relevant parts can be found in the description of the method embodiment.

[0147] This application also provides an electronic device, see embodiments thereof. Figure 4 The provided electronic device 400 includes a memory 410, a processor 420, and a computer program 411 stored in the memory 410 and capable of running on the processor 420. When the computer program 411 is executed by the processor, it implements the various processes of the above-described substation capacity and layout planning method embodiment and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0148] This application also provides a computer-readable storage medium, see embodiments thereof. Figure 5The computer-readable storage medium 500 provided stores a computer program 411. When the computer program 411 is executed by the processor, it implements the various processes of the above-described method embodiment for determining the capacity and layout of the substation, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0149] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0150] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of the embodiments of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or modules is not necessarily limited to those steps or modules explicitly listed, but may include other steps or modules not explicitly listed or inherent to these processes, methods, products, or devices. The division of modules in the embodiments of this application is merely a logical division; in actual applications, there may be other division methods. For example, multiple modules may be combined into or integrated into another system, or some features may be ignored or not performed. Additionally, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interface, and the indirect coupling or communication connection between modules may be electrical or other similar forms, none of which are limited in the embodiments of this application. Furthermore, the modules or sub-modules described as separate components may or may not be physically separated, may or may not be physical modules, or may be distributed among multiple circuit modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the embodiments of this application.

[0151] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0152] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and modules described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0153] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of modules is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple modules 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 an indirect coupling or communication connection between devices or modules through some interfaces, and may be electrical, mechanical, or other forms.

[0154] The modules described as separate components may or may not be physically separate. The components shown as modules may or may not be physical modules; that is, they may be located in one place or distributed across multiple network modules. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0155] Furthermore, the functional modules in the various embodiments of this application can be integrated into one processing module, or each module can exist physically separately, or two or more modules can be integrated into one module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can be stored in a computer-readable storage medium.

[0156] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product.

[0157] The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium may be any available medium that a computer can store or a data storage device such as a server or data center that integrates one or more available media. The available medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., a solid-state drive (SSD)).

[0158] This application describes embodiments with reference to flowchart illustrations and / or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of this application. It should be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing terminal device to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal device, generate instructions for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0159] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing terminal device to operate in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The functions specified in one or more boxes; these computer program instructions may also be loaded onto a computer or other programmable data processing terminal equipment to cause a series of operational steps to be performed on the computer or other programmable terminal equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable terminal equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0160] Although preferred embodiments of the present application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the embodiments of the present application.

[0161] Finally, it should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties. Furthermore, the collection, use and processing of the relevant data must comply with the relevant laws, regulations and standards of the relevant countries and regions, and corresponding operation portals are provided for users to choose to authorize or refuse.

[0162] The technical solutions provided in the embodiments of this application have been described in detail above. Specific examples have been used in the embodiments of this application to illustrate the principles and implementation methods of the embodiments of this application. The description of the above embodiments is only for the purpose of helping to understand the methods and core ideas of the embodiments of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the embodiments of this application. Therefore, the content of this specification should not be construed as a limitation on the embodiments of this application.

Claims

1. A method for determining the capacity and layout of substations, characterized in that, The method includes: The first step is to collect load data from each user within the area to be planned; the load data includes load location and load magnitude. The second step involves dividing the reasonable power supply range of existing substations based on the load data of each user within the area to be planned and preset constraints. Specific steps include: calculating the power supply distance from each user to each existing substation based on the load location of each user; filtering the existing substations closest to each user based on the power supply distance to obtain the nearest user set for each existing substation; for each existing substation, sorting the users in the nearest user set according to the power supply distance from closest to furthest, and dividing the users in the nearest user set sequentially according to the sorting until either the load size or load location of the divided users does not meet one of the preset constraints, and defining the range containing all divided users as the reasonable power supply range of the existing substation; wherein, users within the reasonable power supply range are powered by the existing substations, and the users include existing users and planned users; the preset constraints include a substation low-voltage side load constraint and a power supply radius constraint, the substation low-voltage side load constraint indicating that the load on the substation low-voltage side does not exceed a preset first threshold, and the power supply radius constraint indicating that the substation's power supply radius does not exceed a preset second threshold; The third step is to match site capacity to existing and planned users outside the reasonable power supply range, and plan the site layout based on the site capacity. The specific steps include: initially grouping existing and planned users outside the reasonable power supply range into several load clusters; calculating the total load size of each load cluster, matching site capacity according to the total load size of each load cluster; and planning the site layout for each load cluster based on the site capacity of each load cluster. Step 4: Merge the planned station and the existing station to obtain a new existing station; Step 5: Repeat steps 2 to 4 above for the new existing stations until no new planned stations are needed.

2. The method according to claim 1, characterized in that, During the user partitioning process, when the load size or load location of the partitioned users does not meet one of the preset constraints, the method further includes: For the target existing station that meets the power supply radius constraint and still meets the station low-voltage side load constraint, and for the undivided users in the nearest user set, continue to execute the steps of calculating the power supply distance from the undivided users to the target existing station, screening existing stations for the undivided users, and dividing users for the undivided users, until no new users are divided.

3. The method according to claim 1 or 2, characterized in that, The load size is used to calculate the load on the low-voltage side of the station; the load location is used to determine the power supply radius, which indicates the longest power supply distance from the current station to the load, and the power supply distance is the line length from the station to a certain user. The reasonable power supply range includes an optimal power supply range and a safe power supply range; wherein, the preset first threshold set for the optimal power supply range and the preset first threshold set for the safe power supply range are different; the preset second threshold set for the optimal power supply range and the preset second threshold set for the safe power supply range are different.

4. The method according to claim 1, characterized in that, The method of planning the site deployment for each load cluster based on the site capacity of each load cluster includes: If the site capacity of a certain load cluster is less than the preset capacity threshold, then no site deployment will be planned for that load cluster. If the site capacity of a certain load cluster is greater than or equal to the preset capacity threshold, the number of sites shall be determined according to the capacity range in which the site capacity of the load cluster is located. If the number of deployment points of a certain load cluster is greater than or equal to 2, then the load cluster is divided into a corresponding number of sub-load clusters according to the number of deployment points. The load weighting center of each load point in the sub-load cluster is used as the location of the planned station, and the planned stations are deployed according to the location.

5. The method according to claim 1, characterized in that, The users include medium-voltage users and low-voltage users; wherein, the medium-voltage users correspond to the planned power substations, and the low-voltage users correspond to the planned distribution substations.

6. A device for determining the capacity and layout of a substation, characterized in that, The device includes: The load data acquisition module is used to collect load data from each user within the area to be planned; the load data includes load location and load magnitude. A reasonable power supply range division module is used to divide the reasonable power supply range of existing stations based on the load data of each user in the area to be planned and preset constraints. Specific steps include: calculating the power supply distance from each user to each existing station based on the load location of each user; filtering the existing stations closest to each user based on the power supply distance to obtain the nearest user set for each existing station; for each existing station, sorting the users in the nearest user set according to the power supply distance from nearest to farthest, and dividing the users in the nearest user set sequentially according to the sorting until either the load size or load location of the divided users does not meet one of the preset constraints, and then defining the range containing all divided users as the reasonable power supply range of the existing station; wherein, users within the reasonable power supply range are powered by the existing station, and the users include existing users and planned users; the preset constraints include a station low-voltage side load constraint and a power supply radius constraint, the station low-voltage side load constraint indicating that the load on the station low-voltage side does not exceed a preset first threshold, and the power supply radius constraint indicating that the power supply radius of the station does not exceed a preset second threshold; The capacity determination and site deployment module is used to match site capacity with existing and planned users outside the reasonable power supply range, and to plan site deployment based on the site capacity. Specific steps include: initially grouping existing and planned users outside the reasonable power supply range into several load clusters; calculating the total load size of each load cluster; matching site capacity according to the total load size of each load cluster; and planning site deployment for each load cluster based on the site capacity of each load cluster. The station merging module is used to merge the planned stations and the existing stations to obtain new existing stations; The loop execution module is used to repeatedly perform the steps of reasonable power supply range division, site capacity matching, and site planning for the new existing stations until no new planned stations are needed.

7. An electronic device, characterized in that, include: A processor, a memory, and a computer program stored in the memory and capable of running on the processor, wherein the computer program, when executed by the processor, implements the substation capacity and location planning method as described in any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the substation capacity and location planning method as described in any one of claims 1 to 5.

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