CN-121984017-A - Distribution network line current out-of-limit load optimization method, system, equipment, medium and product

CN121984017ACN 121984017 ACN121984017 ACN 121984017ACN-121984017-A

Abstract

The invention relates to the technical field of power distribution network load management and discloses a distribution network line current out-of-limit load optimization method, a system, equipment, a medium and a product, wherein the method comprises the steps of obtaining an overload out-of-limit line in a power distribution network, and identifying all connecting lines with physical connection relations with the overload out-of-limit line by combining with line topology information of the power distribution network; the method comprises the steps of obtaining operation information of each connecting line, screening effective connecting lines from a plurality of connecting lines according to the operation information, determining a plurality of rotatable power supply paths according to the connection relation between the effective connecting lines and the overload limit crossing lines, carrying out multi-target power supply transferring capability assessment on each rotatable power supply path, screening optimal power supply transferring paths from the rotatable power supply paths according to assessment results, and carrying out load transferring operation on the overload limit crossing lines according to the optimal power supply transferring paths, so that dynamic adaptability and overall robustness of a system of the power distribution network are remarkably improved.

Inventors

QIU GUIHUA
KUANG ZIJIA
WU SHUHONG
HE YINSHENG
GUO ZHISHEN
LIANG ZHANXI

Assignees

广东电网有限责任公司佛山供电局

Dates

Publication Date: 20260505
Application Date: 20260408

Claims (10)

1. The method for optimizing the out-of-limit load of the distribution network line current is characterized by comprising the following steps of: Acquiring overload out-of-limit lines in a power distribution network, and identifying all contact lines with physical contact relation with the overload out-of-limit lines by combining line topology information of the power distribution network; Acquiring operation information of each contact line, and screening effective contact lines from a plurality of contact lines according to the operation information; Determining a plurality of rotatable power supply paths according to the contact relation between the effective contact line and the overload out-of-limit line; carrying out multi-target power transfer capability evaluation on each rotatable power supply path, and screening out an optimal power transfer path from a plurality of rotatable power supply paths according to evaluation results; and executing load transfer operation on the overload out-of-limit line according to the optimal transfer power supply path.
2. The method for optimizing out-of-limit load of distribution network line current according to claim 1, wherein said obtaining overload out-of-limit lines in a distribution network and combining line topology information of the distribution network identify all connection lines having physical connection relation with the overload out-of-limit lines comprises: acquiring current-carrying capacity information of each line of the power distribution network, and identifying the overload out-of-limit line according to the current-carrying capacity information; And acquiring the circuit topology information of the power distribution network, determining all adjacent circuits which have physical contact points with the overload out-of-limit circuit and are provided with controllable remote control switches according to the circuit topology information, and taking the adjacent circuits as the contact circuits.
3. The distribution network line current out-of-limit load optimization method according to claim 1, wherein the operation information comprises a temporary transfer power out-of-limit record, a load rate, a heavy overload history record and a load limit flag record; the screening the effective contact line from the contact lines according to the operation information comprises the following steps: Screening out contact lines which do not contain temporary power transfer out-of-limit records from a plurality of contact lines as first candidate contact lines; removing the contact lines with the load rate larger than a preset load rate threshold value from the plurality of first candidate contact lines to obtain a second candidate contact line; And eliminating the contact lines with the heavy overload historical record or the load limit mark record from the plurality of second candidate contact lines to obtain the effective contact lines.
4. The distribution network line current out-of-limit load optimization method according to claim 1, wherein determining a plurality of rotatable power supply paths according to a connection relationship between the active connection line and the overload out-of-limit line comprises: Traversing each effective interconnecting line, and identifying a plurality of controllable remote switches between the effective interconnecting lines and the overload out-of-limit line; Acquiring a transfer load upper limit value of each controllable remote control switch, and determining a remote control switch with the maximum transfer load upper limit value as a preferable remote control switch; Sequentially traversing all remote control switches on a path along the effective connecting line towards the connecting point by taking the preferred remote control switch as a starting point until all the remote control switches meeting preset load transfer constraint are found to serve as power transfer switches, wherein the preset load transfer constraint at least comprises that the number of power supply users after power transfer does not exceed a preset user number threshold or the new energy permeability does not exceed a preset permeability threshold; and constructing the rotatable power supply path according to the connection relation among the effective connection line, the power transfer switch and the overload out-of-limit line for each power transfer switch.
5. The method for optimizing out-of-limit load of power distribution network line current according to claim 4, wherein said performing multi-objective power transfer capability evaluation on each of said rotatable power supply paths and selecting an optimal power transfer path from a plurality of said rotatable power supply paths according to the evaluation result comprises: If one rotatable power supply path exists, the rotatable power supply path is used as the optimal rotatable power supply path; if there are a plurality of the rotatable power supply paths, performing: Screening all the rotatable power supply paths which meet the condition that the number of power supply users after power supply is switched does not exceed a preset user number threshold value from a plurality of rotatable power supply paths, and the new energy permeability does not exceed the preset permeability threshold value as a first preferable power supply path, and screening the path with the largest line loss reduction amount from the first preferable power supply path as the optimal power supply path; If the first preferable power transfer path does not exist, screening all the power transfer paths meeting the requirement that the new energy permeability does not exceed a preset permeability threshold from a plurality of the power transfer paths to serve as second preferable power transfer paths, and screening the path with the largest line loss reduction amount from the second preferable power transfer paths to serve as the optimal power transfer path; And if the second optimal power transfer path does not exist, selecting a path with the minimum new energy permeability from a plurality of power transfer paths as the optimal power transfer path.
6. The distribution network line current out-of-limit load optimization method according to any one of claims 1 to 5, further comprising: taking the rotatable power supply paths except the optimal rotatable power supply path in the plurality of rotatable power supply paths as standby rotatable power supply paths; And generating a transfer execution list according to the overload out-of-limit line, the optimal transfer power supply path and the standby transfer power supply path.
7. A distribution network line current out-of-limit load optimization system, comprising: The communication line determining module is used for acquiring overload out-of-limit lines in the power distribution network and identifying all communication lines with physical communication relation with the overload out-of-limit lines by combining the line topology information of the power distribution network; The circuit screening module is used for acquiring the operation information of each contact circuit and screening effective contact circuits from a plurality of contact circuits according to the operation information; The power transfer screening module is used for determining a plurality of power transfer paths according to the contact relation between the effective contact line and the overload out-of-limit line; The power transfer optimization module is used for carrying out multi-target power transfer capacity evaluation on each rotatable power supply path and screening an optimal power transfer path from a plurality of rotatable power supply paths according to evaluation results; and the load transfer module is used for executing load transfer operation on the overload out-of-limit line according to the optimal transfer power supply path.
8. An electronic device comprising a memory and a processor, wherein the memory stores a computer program that, when executed by the processor, causes the processor to perform the steps of the distribution network line current out-of-limit load optimization method of any one of claims 1-6.
9. A computer readable storage medium having stored thereon a computer program, characterized in that the computer program when executed implements the steps of the distribution network line current out-of-limit load optimization method according to any of claims 1-6.
10. A computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions, wherein the program instructions, when executed by a computer, cause the computer to perform the steps of the distribution network line current out-of-limit load optimization method according to any of claims 1-6.

Description

Distribution network line current out-of-limit load optimization method, system, equipment, medium and product Technical Field The invention relates to the technical field of power distribution network load management, in particular to a distribution network line current out-of-limit load optimization method, a system, equipment, a medium and a product. Background The power distribution network is used as a key carrier for large-scale access and diversified load absorption of distributed energy resources, and bears the core responsibility of distributing electric energy from a transmission network to terminal users, the running state of the power distribution network directly influences the power supply reliability and the electric energy quality, meanwhile, the terminal load is characterized by rapid growth and unbalanced space-time distribution, the novel loads such as high-proportion permeation of the overlapped distributed new energy sources and electric vehicle charging stations are accessed in a concentrated mode, the problems of overload of the power distribution network lines, voltage out-of-limit and the like are increasingly outstanding, and the safe and stable running of the power grid is seriously threatened. At present, manual inspection and empirical dispatching are adopted to dispatch out-of-limit lines, but the existing distribution network lines are frequently overloaded due to the fact that users are more and new energy power generation is more, dispatching is carried out in a manual mode, so that the efficiency is low, the problems of safety margin, user scale threshold value, new energy permeability and the like are difficult to comprehensively consider, and the safety problems of unstable voltage, protection misoperation and the like are easily caused. Disclosure of Invention In view of the above, the present invention provides a method, a system, a device, a medium and a product for optimizing a distribution network line current out-of-limit load. The first aspect of the invention provides a distribution network line current out-of-limit load optimization method, which comprises the following steps: Acquiring overload out-of-limit lines in a power distribution network, and identifying all contact lines with physical contact relation with the overload out-of-limit lines by combining line topology information of the power distribution network; Acquiring operation information of each contact line, and screening effective contact lines from a plurality of contact lines according to the operation information; Determining a plurality of rotatable power supply paths according to the contact relation between the effective contact line and the overload out-of-limit line; carrying out multi-target power transfer capability evaluation on each rotatable power supply path, and screening out an optimal power transfer path from a plurality of rotatable power supply paths according to evaluation results; and executing load transfer operation on the overload out-of-limit line according to the optimal transfer power supply path. In one embodiment, the obtaining overload out-of-limit lines in the power distribution network and identifying all connection lines having a physical connection relationship with the overload out-of-limit lines in combination with the line topology information of the power distribution network includes: acquiring current-carrying capacity information of each line of the power distribution network, and identifying the overload out-of-limit line according to the current-carrying capacity information; And acquiring the circuit topology information of the power distribution network, determining all adjacent circuits which have physical contact points with the overload out-of-limit circuit and are provided with controllable remote control switches according to the circuit topology information, and taking the adjacent circuits as the contact circuits. In one embodiment, the operation information includes a temporary power transfer out-of-limit record, a load rate, a heavy overload history record and a load limit flag record; the screening the effective contact line from the contact lines according to the operation information comprises the following steps: Screening out contact lines which do not contain temporary power transfer out-of-limit records from a plurality of contact lines as first candidate contact lines; removing the contact lines with the load rate larger than a preset load rate threshold value from the plurality of first candidate contact lines to obtain a second candidate contact line; And eliminating the contact lines with the heavy overload historical record or the load limit mark record from the plurality of second candidate contact lines to obtain the effective contact lines. In one embodiment, determining a plurality of rotatable power supply paths according to the connection relationship between the effective connection line and the overload out-of-limit line incl