A method, system, device and storage medium for inter-station load transfer

By generating and evaluating alternative load transfer schemes between distribution stations, and selecting the scheme with the greatest comprehensive benefits based on load timing characteristics, the problem of high cost and low efficiency in load transfer between distribution stations in the existing technology is solved, and the economy and optimization effect of load transfer are realized.

CN119419810BActive Publication Date: 2025-12-02GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
View PDF 2 Cites 0 Cited by

Patent Information

Application Number
CN202411343579.1
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-09-25
Publication Date
2025-12-02
Estimated Expiration
2044-09-25

AI Technical Summary

Technical Problem

Existing inter-transformer load transfer methods lack a scientific decision-making process, resulting in high load transfer costs and low efficiency, ineffective utilization of remaining transformer capacity, and failure to consider transformer load peak and demand response benefits.

Method used

By acquiring basic data of the original and target transformer areas, a set of alternative solutions is generated. Based on the time-series characteristics of transformer area load, the comprehensive benefits are calculated, and the solution with the greatest comprehensive benefits is selected for load transfer, taking into account the costs and benefits of load transfer.

Benefits of technology

This achieves optimized load transfer schemes, meets the demand response efficiency requirements of distribution areas, reasonably assesses the costs and benefits of load transfer, and ensures the economy and effectiveness of load transfer.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN119419810B_ABST
    Figure CN119419810B_ABST
Patent Text Reader

Abstract

This invention relates to the field of power grid load control technology, and proposes a method, system, device, and storage medium for inter-distribution load transfer. The method includes the following steps: acquiring basic data of the original distribution area with heavy overload problems; searching for target distribution areas centered on the original distribution area within a preset transfer distance threshold range, and acquiring basic data of the target distribution areas; generating several alternative schemes for transferring the load of the original distribution area to a target distribution area, forming a set of alternative schemes; calculating the comprehensive benefit of any alternative scheme based on the time-series characteristics of the distribution area load, and executing the alternative scheme with the largest comprehensive benefit to complete the inter-distribution load transfer.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] This invention relates to the field of power grid load regulation technology, and more specifically, to a method, system, device, and storage medium for inter-distribution load transfer. Background Technology

[0002] With economic development and improved living standards, electricity demand is growing rapidly. Due to insufficient planning and construction in the early stages, distribution transformer areas are struggling to keep up with the rapid increase in demand, easily leading to severe overload problems. Building new transformers or expanding existing ones can fundamentally increase the power supply capacity of a distribution transformer area, but this method is time-consuming and may be wasteful in terms of economics. If there are transformers with spare capacity near the overloaded area, part of the load can be transferred to other transformers, effectively utilizing their spare capacity and quickly and economically resolving the overload problem.

[0003] Currently, load transfer between distribution transformers typically relies on the experience of on-site personnel for judgment. For example, a transfer scheme is determined based on the criterion that the sum of the maximum value of the transferred load and the maximum value of the original load of the transformer to be connected does not exceed the overload threshold of that transformer. This approach lacks a more scientific decision-making process and cannot guarantee the effectiveness of load transfer. Another approach proposes conducting safety analysis on the main load transformers and lines of the distribution area to identify potential overload fault nodes and overload fault nodes. This involves determining the load transfer path for overload nodes through topology search and formulating corresponding load transfer strategies, aiming to determine the optimal load transfer scheme with the minimum average overload rate. However, this approach does not consider the peak load of the distribution transformers or the benefits of demand response in the distribution area, resulting in high load transfer costs and low efficiency. Summary of the Invention

[0004] To overcome the shortcomings of high cost and low efficiency in inter-station load transfer described in the prior art, this invention provides an inter-station load transfer method, system, equipment, and storage medium.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0006] A method for inter-substation load transfer includes the following steps:

[0007] Obtain basic data of the original transformer areas where heavy overload issues exist;

[0008] Search for target stations centered on the original station area within a preset transfer distance threshold range, and obtain basic data of the target station area;

[0009] Generate several alternative schemes for transferring the load of the original transformer area to a target transformer area, forming a set of alternative schemes;

[0010] Calculate the comprehensive benefits of any alternative scheme based on the load time sequence characteristics of the transformer area, and select the alternative scheme with the greatest comprehensive benefits to complete the load transfer between transformer areas.

[0011] Furthermore, this invention also proposes an inter-substation load transfer system, applying the inter-substation load transfer method proposed in this invention. The system includes:

[0012] The data acquisition module is used to acquire basic data of the original transformer area with heavy overload problems, and to search for target transformer areas centered on the original transformer area within a preset transfer distance threshold range, and acquire basic data of the target transformer area.

[0013] The scheme generation module is used to generate several alternative schemes for transferring the load of the original transformer area to a target transformer area, forming a set of alternative schemes;

[0014] The analysis strategy module is used to calculate the comprehensive benefits of any alternative scheme based on the time-series characteristics of the transformer area load, and output the alternative scheme with the largest comprehensive benefits.

[0015] Furthermore, the present invention also proposes an apparatus comprising a memory and a processor, wherein the memory stores computer-readable instructions, wherein when executed by the processor, the computer-readable instructions cause the processor to perform all or part of the steps of the inter-station load transfer method as described in the present invention.

[0016] Furthermore, the present invention also proposes a storage medium storing computer-readable instructions thereon, wherein the computer-readable instructions, when executed by a processor, implement all or part of the steps of the inter-station load transfer method as described in the present invention.

[0017] Compared with the prior art, the beneficial effects of the technical solution of the present invention are:

[0018] This invention evaluates alternative solutions based on comprehensive benefits, taking into account the costs and benefits of load transfer between distribution stations and load participation in demand response, as well as the costs and benefits of load transfer, to ensure that the final selected load transfer solution meets the demand response benefit requirements of the distribution station, while ensuring the optimization effect of load transfer. Attached Figure Description

[0019] Figure 1 This is a flowchart illustrating an inter-station load transfer method according to an embodiment of the present invention.

[0020] Figure 2 This is a schematic diagram of the historical load data of the distribution transformer in the original distribution area within 7 days before the load transfer, according to an embodiment of the present invention.

[0021] Figure 3This is a schematic diagram of the historical load data of the distribution transformer in the target area 1 within 7 days before the load transfer, according to an embodiment of the present invention.

[0022] Figure 4 This is a schematic diagram of the historical load data of the distribution transformer in the target area 2 within 7 days before the load transfer, according to an embodiment of the present invention.

[0023] Figure 5 This is an architectural diagram of an inter-station load transfer system according to an embodiment of the present invention. Detailed Implementation

[0024] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the invention as detailed in the appended claims.

[0025] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular forms “a,” “the,” and “the” used in this invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0026] It should be understood that although the terms first, second, third, etc., may be used in this invention to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, first information may also be referred to as second information without departing from the scope of this invention, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to a determination."

[0027] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0028] Example 1

[0029] This embodiment proposes a method for inter-station load transfer, such as... Figure 1 The diagram shown is a flowchart of the inter-station load transfer method in this embodiment.

[0030] The inter-station load transfer method proposed in this embodiment includes the following steps:

[0031] S1. Obtain basic data of the original transformer area where there is a heavy overload problem;

[0032] S2. Search for target stations within a preset transfer distance threshold range centered on the original station area, and obtain basic data of the target station area;

[0033] S3. Generate several alternative schemes for transferring the load of the original transformer area to a target transformer area, forming a set of alternative schemes;

[0034] S4. Calculate the comprehensive benefits of any alternative scheme based on the load time sequence characteristics of the transformer area, and select the alternative scheme with the largest comprehensive benefits to complete the load transfer between transformer areas.

[0035] This embodiment evaluates alternative solutions based on comprehensive benefits, taking into account the costs and benefits of load transfer between distribution stations and load participation in demand response, as well as the costs and benefits of load transfer, to ensure that the final selected load transfer solution meets the demand response benefit requirements of the distribution station, while ensuring the optimization effect of load transfer.

[0036] In an optional embodiment, the basic data of the original transformer area includes the transformer coordinates and transformer capacity S of the transformer area. T0 Comprehensive cost of distribution transformer C T0 Distribution transformer service life L T0 Historical load data of distribution transformers Comprehensive cost per unit length of main line C K0a Main line service life L L0a and historical load data of main lines Where 'a' is the number of the main trunk line, and a = 1, 2, ..., N a N a The number of main lines; d is the number of days, and d = 1, 2, ..., N d N d t represents the total number of days; t represents the data collection time number, where t = 1, 2, ..., N. t N t This represents the total number of data collections in a day.

[0037] Furthermore, in an optional embodiment, the basic data of the target station area includes the distance r between the target station area and the original station area. j Target transformer capacity S Tj Comprehensive cost of distribution transformer C Tj Distribution transformer service life L Tj and historical load data of distribution transformers Where j is the distance from the original transformer area that is not greater than the transfer distance threshold r. smax The target station area number, where j = 1, 2, ..., N j N j The total number of target stations.

[0038] In this embodiment, historical load data refers to the load data of the period preceding the current time.

[0039] For example, the time period is 30 days or 7 days.

[0040] In an alternative embodiment, generating several alternative schemes for transferring the load of the original distribution area to a target distribution area includes:

[0041] The load of the a-th main line in the original distribution area is transferred to the j-th target distribution area; where...

[0042] a = 1, 2, ..., N a N a The number of main trunk lines; j = 1, 2, ..., N j N j The total number of target stations.

[0043] In step S3 of this embodiment, there are a total of N a ×N j There are N alternative solutions, and s represents the number of each alternative solution, i.e., s = 1, 2, ..., N. a ×N j .

[0044] Furthermore, in an optional embodiment, the method further includes the following steps:

[0045] S301. Perform capacity verification on each candidate solution in the candidate solution set; wherein:

[0046] For the s-th alternative, determine the target station area j mentioned in it. s Distribution transformer historical load data With the original main line a of the transformer area s Historical load data of main lines If the maximum value of the sum is less than a preset capacity threshold, the capacity check passes and the alternative solution is retained; otherwise, the capacity check fails and the alternative solution is removed from the alternative solution set. s j is the number of the main trunk line selected in alternative scheme s; s The number of the target station area selected in alternative scheme s.

[0047] For example, the capacity threshold is in The target station area j selected in alternative scheme s s The transformer capacity. Then the expression for the above judgment condition is:

[0048]

[0049] After capacity verification, a set of selected alternative solutions S' is obtained.

[0050] In an optional embodiment, calculating the comprehensive benefits of any alternative scheme based on the time-series characteristics of the transformer area load includes the following steps:

[0051] For the s-th alternative, the combined benefit G of the original transformer area load transfer capacity of the alternative is... 0P (s), Original transformer area demand response benefits H 0D (s), Demand Response Benefits of Target Area G 1D (s), and the target area load transfer capacity cost C of the alternative scheme. 1P (s), Cost of new line C L (s) Calculate the comprehensive benefits; its expression is:

[0052]

[0053] In this embodiment, the original transformer area load transfer capacity benefit G 0P (s) represents the benefit of the transformer capacity margin resulting from the decrease in the maximum load of the original transformer area after load transfer. It is determined by multiplying the equivalent annual cost of the original transformer area's comprehensive construction cost by the ratio of the maximum load decrease before and after the load transfer to the transformer capacity. Its expression is:

[0054]

[0055] In the formula, C T0 Let L be the total cost of the distribution transformer in the original transformer area, r be the discount rate, and L be the total cost of the distribution transformer. T0 The original transformer operating life of the distribution area; This is the original distribution transformer historical load data for the original distribution area. The main line a selected in alternative scheme s s Historical load data; S T0 The original transformer capacity of the distribution area; a s Let a be the number of the main trunk line selected in alternative scheme s, and a s =1,2,...,N a N a The number of main lines; d is the number of days, and d = 1, 2, ..., N d N d t represents the total number of days; t represents the data collection time number, where t = 1, 2, ..., N. t N t This represents the total number of data collections in a day.

[0056] The original transformer area demand response benefit G 0D(s) and the target area demand response benefits G 1D (s) represents the maximum difference between the benefit of the transformer capacity margin resulting from the decrease in the maximum load of the transformer after demand response and the cost of demand response. Its expression is:

[0057]

[0058]

[0059] In the formula, P 0Dmax P 1Dmax p represents the maximum load of the original and target transformer areas after the demand response is executed. 0D p 1D These represent the demand response subsidy prices for the original and target transformer areas, respectively; Δt is the time interval between two adjacent data collection times; k D The sensitivity of demand response participation to demand response subsidy prices; The target station area j selected in alternative scheme s s The overall cost of distribution transformers, The target station area j selected in alternative scheme s s The service life of the distribution transformer; The target station area j selected in alternative scheme s s Historical load data of distribution transformers; The target station area j selected in alternative scheme s s Distribution transformer capacity; j s Let j be the number of the target station area selected in alternative scheme s, and j s =1,2,...,N j N j The total number of target stations.

[0060] Among them, the maximum load P of the original transformer area and the target transformer area after the demand response is executed. 0Dmax P 1Dmax The following constraints must be met:

[0061]

[0062] In the formula, mean(·) is the average value function.

[0063] The target area load transfer capacity cost C 1P (s) represents the cost of transformer capacity occupancy resulting from the increase in the maximum load of the target transformer area after load transfer. Its expression is:

[0064]

[0065] In the formula, the first term represents the annual equivalent cost of the comprehensive construction cost of the distribution transformer in the target area, and the second term represents the ratio of the maximum load increase before and after the load transfer of the target area to the transformer capacity.

[0066] The cost of the newly built line C L (s) represents the cost of the newly constructed line from the target transformer area to the original transformer area for load transfer, determined using the equivalent annual cost of the comprehensive construction cost of the new line. Its expression is:

[0067]

[0068] In the formula, Indicates the main line a selected from alternative scheme s. s The overall cost per unit length; Indicates the main line a selected from alternative scheme s. s The service life of the main trunk line; Indicates the target station area j selected in alternative scheme s. s Distance from the original station area.

[0069] For example, the sensitivity k in this embodiment D The value is 0.2.

[0070] Further optionally, the original transformer area demand response benefit G 0D (s) and the target area demand response benefits G 1D (s) is a maximization optimization problem, which is solved using an artificial intelligence optimization algorithm.

[0071] For example, a genetic algorithm and / or a particle swarm optimization algorithm are used to evaluate the demand response efficiency G of the original transformer area. 0D (s) and the target area demand response benefits G 1D (s) is used to solve.

[0072] As an example, the inter-transformer load transfer method proposed in this embodiment is applied to an original transformer substation. Using a transfer distance threshold of 0.1 km, data for the original substation and two target substations are obtained. The historical load data of the transformers in the original substation, target substation 1, and target substation 2 for the seven days prior to the load transfer are as follows: Figures 2-4 As shown in the example, the original transformer substation, target substation 1, and target substation 2 all use 500kVA dry-type transformers, with a comprehensive cost of 122,690 yuan and an operating life of 20 years. The original transformer substation has 3 main lines, all of which are BVV-120 models, with a comprehensive cost of 95,298 yuan / km and an operating life of 15 years. The distance between target substation 1 and the original transformer substation is 0.08km, and the distance between target substation 2 and the original transformer substation is 0.07km.

[0073] The following alternative solutions were further generated:

[0074] Alternative Option 1: Transfer the first main line of the original transformer area to the first target transformer area;

[0075] Alternative Option 2: Transfer the second main line of the original transformer area to the first target transformer area;

[0076] Alternative Option 3: Transfer the third main line of the original transformer area to the first target transformer area;

[0077] Alternative Option 4: Transfer the first main line of the original transformer area to the second target transformer area;

[0078] Alternative Option 5: Transfer the second main line of the original transformer area to the second target transformer area;

[0079] Alternative Option 6: Transfer the third main line of the original transformer area to the second target transformer area.

[0080] Further capacity verification was conducted on alternative schemes 1 to 6, and all filed schemes were retained.

[0081] Furthermore, with a discount rate of 10%, the overall benefits and costs of each alternative plan are shown in Table 1 below.

[0082] Table 1. Overall benefits and individual benefits and costs of each alternative plan

[0083] Option 1 Option 2 Option 3 Option 4 Option 5 Option 6 G(s) -504 -639 -429 144 545 766 <![CDATA[G 0P (s)]]> 3183 4102 5697 3183 4102 5697 <![CDATA[G 0D (s)]]> 238 300 223 238 300 223 <![CDATA[G 1D (s)]]> 256 370 313 205 266 316 <![CDATA[C 1P (s)]]> 3179 4409 5723 2605 3246 4593 <![CDATA[C L (s)]]> 1002 1002 1002 877 877 877

[0084] As shown in the table above, Option 6 offers the greatest overall benefit; therefore, Option 6 is selected for inter-station load transfer. Thus, this embodiment ensures that the final selected load transfer scheme meets the demand response efficiency requirements of the substation area while guaranteeing the optimized load transfer effect.

[0085] Example 2

[0086] This embodiment proposes an inter-station load transfer system, applying the inter-station load transfer method proposed in Embodiment 1. For example... Figure 5 The diagram shown is an architecture diagram of the inter-station load transfer system in this embodiment.

[0087] The inter-station load transfer system proposed in this embodiment includes:

[0088] The data acquisition module is used to acquire basic data of the original transformer area with heavy overload problems, and to search for target transformer areas centered on the original transformer area within a preset transfer distance threshold range, and acquire basic data of the target transformer area.

[0089] The scheme generation module is used to generate several alternative schemes for transferring the load of the original transformer area to a target transformer area, forming a set of alternative schemes;

[0090] The analysis strategy module is used to calculate the comprehensive benefits of any alternative scheme based on the time-series characteristics of the transformer area load, and output the alternative scheme with the largest comprehensive benefits.

[0091] Furthermore, in an optional embodiment, the system further includes a scheme verification module for performing capacity verification on each alternative scheme in the alternative scheme set.

[0092] For the s-th alternative, determine the target station area j mentioned therein. s Distribution transformer historical load data With the original main line a of the transformer area s Historical load data of main lines If the maximum value of the sum is less than a preset capacity threshold, the capacity check passes and the alternative solution is retained; otherwise, the capacity check fails and the alternative solution is removed from the alternative solution set. s j is the number of the main trunk line selected in alternative scheme s; s The number of the target station area selected in alternative scheme s.

[0093] It is understood that the system in this embodiment corresponds to the method in Embodiment 1 above, and the options in Embodiment 1 above are also applicable to this embodiment, so they will not be described again here.

[0094] Example 3

[0095] This embodiment proposes a computer device, including a memory and a processor. The memory stores computer-readable instructions, which, when executed by the processor, cause the processor to perform the steps of the inter-station load transfer method proposed in Embodiment 1.

[0096] Example 4

[0097] This embodiment proposes a storage medium storing computer-readable instructions, wherein when the computer-readable instructions are executed by a processor, the steps of the inter-station load transfer method proposed in Embodiment 1 are implemented.

[0098] By way of example, the storage medium includes, but is not limited to, USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks or optical disks, and other media capable of storing program code.

[0099] By way of example, the instructions, programs, code sets, or instruction sets may be implemented using conventional programming languages.

[0100] By way of example, the processor includes, but is not limited to, smartphones, personal computers, servers, network devices, etc., for performing all or part of the steps of the inter-station load transfer method described in Example 1.

[0101] The various embodiments in this invention are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the device embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments. The device embodiments described above are merely exemplary. The modules described as separate components may or may not be physically separate. When implementing the present invention, the functions of each module can be implemented in one or more software and / or hardware. Alternatively, some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0102] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A method for load transfer between distribution stations, characterized in that, Includes the following steps: Obtain basic data of the original transformer areas where heavy overload issues exist; Search for target stations centered on the original station area within a preset transfer distance threshold range, and obtain basic data of the target station area; The basic data of the original transformer area includes the transformer coordinates and transformer capacity of the area. Comprehensive cost of distribution transformer Distribution transformer service life Historical load data of distribution transformers Comprehensive cost per unit length of main line Main line service life and historical load data of main lines ;in, a It is the number of the main line, and , The number of main lines; d The number is the number of days, and , Total number of days; t This is the number representing the time of data acquisition, and , This represents the total number of data collections per day. The basic data for the target transformer area includes the distance between the target transformer area and the original transformer area. Distribution transformer capacity of the target area Comprehensive cost of distribution transformer Distribution transformer service life and historical load data of distribution transformers ;in, j To ensure the distance from the original transformer area is no greater than the transfer distance threshold The target station area number, and , The total number of target stations; Generate several alternative schemes for transferring the load of the original transformer area to a target transformer area, forming a set of alternative schemes; The generation of several alternative schemes for transferring the load of the original transformer area to a target transformer area includes: transferring the load of the original transformer area to the target transformer area. a The load on the main line is transferred to the first j One target area; among them , The number of main lines; , The total number of target stations; Capacity verification is performed on each candidate solution in the set of candidate solutions; wherein: For the s One alternative plan, and determine the target area mentioned among them. Distribution transformer historical load data With the original main line of the transformer area Historical load data of main lines If the maximum value of the sum is less than a preset capacity threshold, then the capacity check passes and the alternative solution is retained; otherwise, the capacity check fails and the alternative solution is deleted from the alternative solution set. As an alternative plan s The selected trunk line number; As an alternative plan s The number of the target station area selected in the text; Calculate the comprehensive benefits of any alternative scheme based on the load time sequence characteristics of the transformer area, and select the alternative scheme with the largest comprehensive benefits to complete the load transfer between transformer areas; The calculation of the comprehensive benefits of any alternative scheme based on the time-series characteristics of transformer area load includes the following steps: For the s One alternative plan, comprehensively considering the original load transfer capacity benefits of the alternative plans. Original transformer area demand response benefits Demand response benefits of the target transformer area And the target area load transfer capacity cost of alternative solutions. Cost of building new lines The overall benefits are calculated; the expression is: 。 2. The inter-station load transfer method according to claim 1, characterized in that, The original transformer area load transfer capacity benefit It represents the benefit of the transformer capacity margin brought about by the decrease in the maximum load of the original transformer area after load transfer. It is determined by multiplying the equivalent annual cost of the original transformer area's comprehensive construction cost and the ratio of the maximum load decrease before and after the load transfer to the transformer capacity. Its expression is: In the formula, The total cost of the distribution transformers in the original transformer area. r For the discount rate, The original transformer operating life of the distribution area; This is the original distribution transformer historical load data for the original transformer area. As an alternative plan s The main line selected in Historical load data This represents the original transformer capacity of the distribution area; As an alternative plan s The selected trunk line number, and , The number of main lines; d The number is the number of days, and , Total number of days; t This is the number representing the time of data acquisition, and , This represents the total number of data collections per day. The original transformer area demand response benefits and the demand response benefits of the target area The maximum value of the difference between the benefit of the transformer capacity margin resulting from the decrease in the maximum load of the transformer after demand response in the distribution area and the cost of demand response. Its expression is: In the formula, , These are the maximum loads of the original and target transformer areas after the demand response is executed, and they satisfy the following conditions: , ,in, It is a function of average value; , These are the demand response subsidy prices for the original transformer area and the target transformer area, respectively. The time interval between two adjacent data collection moments; The sensitivity of demand response participation to demand response subsidy prices; As an alternative plan s The target area selected in The overall cost of distribution transformers, As an alternative plan s The target area selected in The service life of the distribution transformer; As an alternative plan s The target area selected in Historical load data of distribution transformers; As an alternative plan s The target area selected in Distribution transformer capacity; As an alternative plan s The selected target station number, and , The total number of target stations; The target area load transfer capacity cost This represents the cost of transformer capacity occupancy resulting from the increase in the maximum load of the target transformer area after load transfer; its expression is: In the formula, the first term represents the annual equivalent cost of the comprehensive construction cost of the distribution transformer in the target area, and the second term represents the ratio of the maximum load increase before and after the load transfer of the target area to the transformer capacity. The cost of the newly built line This represents the cost of the newly constructed transmission line from the target transformer area to the original transformer area for load transfer, determined using the equivalent annual cost of the comprehensive construction cost of the new transmission line; its expression is: In the formula, Indicate alternative solutions s The main line selected in The overall cost per unit length; Indicate alternative solutions s The main line selected in The service life of the main trunk line; Indicate alternative solutions s The target area selected in Distance from the original station area.

3. The inter-station load transfer method according to claim 2, characterized in that, The original transformer area demand response benefits and the demand response benefits of the target area To maximize the optimization of the problem, an artificial intelligence optimization algorithm is used to solve it.

4. A load transfer system between distribution stations, using the load transfer method according to any one of claims 1 to 3, characterized in that, include: The data acquisition module is used to acquire basic data of the original transformer area with heavy overload problems, and to search for target transformer areas centered on the original transformer area within a preset transfer distance threshold range, and acquire basic data of the target transformer area. The scheme generation module is used to generate several alternative schemes for transferring the load of the original transformer area to a target transformer area, forming a set of alternative schemes; The analysis strategy module is used to calculate the comprehensive benefits of any alternative scheme based on the time-series characteristics of the transformer area load, and output the alternative scheme with the largest comprehensive benefits.

5. The inter-station load transfer system according to claim 4, characterized in that, The system also includes a scheme verification module, used to perform capacity verification on each candidate scheme in the set of candidate schemes; wherein: For the s One alternative plan, and determine the target area mentioned among them. Distribution transformer historical load data With the original main line of the transformer area Historical load data of main lines If the maximum value of the sum is less than a preset capacity threshold, the capacity check is passed and the alternative scheme is retained; otherwise, the capacity check is not passed and the alternative scheme is deleted from the alternative scheme set.

6. A computer device comprising a memory and a processor, wherein the memory stores computer-readable instructions, characterized in that, When the computer-readable instructions are executed by the processor, the processor performs all or part of the steps of the inter-station load transfer method as described in any one of claims 1 to 3.

7. A storage medium having computer-readable instructions stored thereon, characterized in that, When the computer-readable instructions are executed by a processor, they implement all or part of the steps of the inter-station load transfer method as described in any one of claims 1 to 3.

Citation Information

Patent Citations

  • Power system planning method and system based on low-carbon and economic space-time matching

    CN117540852A

  • Regional power grid load transfer strategy compilation method based on chain overload prevention

    CN118589465A