CN-122000871-A - Method, device and equipment for determining type of load node based on power distribution network

CN122000871ACN 122000871 ACN122000871 ACN 122000871ACN-122000871-A

Abstract

The application provides a method, a device and equipment for determining the type of a load node based on a power distribution network. The method comprises the steps of obtaining electrical parameter information of load nodes in a power distribution network under each time node in a preset time period, wherein the electrical parameter information comprises at least one of voltage information, power information and impedance information, determining connection weight information corresponding to adjacent time according to the impedance information corresponding to each time node in the adjacent time, determining target parameter information of the next time node according to the voltage information and the power information of the load nodes under each time node in the preset time period and the connection weight information corresponding to each adjacent time, wherein the target parameter information comprises the voltage information and the power information of the next time node, and determining the type of the load nodes according to the target parameter information. The method of the application improves the reliability of determining the type of the load node of the power distribution network.

Inventors

DAI SHANQI
HE YUJING
HUANG HONGCHUAN
ZHOU YUTAO
PENG ZHONGYUAN
ZHANG YUQING
XU ZENGQUAN

Assignees

广东电网有限责任公司惠州供电局

Dates

Publication Date: 20260508
Application Date: 20260113

Claims (13)

1. A method for determining a type of load node based on a power distribution network, comprising: Acquiring electrical parameter information of load nodes in a power distribution network at each moment node in a preset time period, wherein the electrical parameter information comprises at least one of voltage information, power information and impedance information; determining connection weight information corresponding to adjacent time according to impedance information corresponding to each time node in the adjacent time, wherein the connection weight information characterizes the possibility of connection between the time nodes in the adjacent time; Determining target parameter information of a next moment node according to voltage information and power information of the load node at each moment node in a preset time period and connection weight information corresponding to each adjacent moment, wherein the target parameter information comprises the voltage information and the power information of the next moment node; and determining the type of the load node according to the target parameter information.
2. The method of claim 1, wherein determining connection weight information corresponding to adjacent time instants based on impedance information corresponding to each time instant node in the adjacent time instants, comprises: determining the impedance amplitude value corresponding to the load node at the adjacent moment according to the impedance information corresponding to the load node at each moment in the adjacent moment, wherein the impedance amplitude value represents the change of the impedance information; And determining connection weight information corresponding to the adjacent moment according to the impedance amplitude value of the load node at the adjacent moment, wherein the connection weight information is characterized as the inverse of the impedance amplitude value.
3. The method according to claim 2, wherein determining the target parameter information of the next time node according to the voltage information and the power information of the load node at each time node in the preset time period and the connection weight information corresponding to each adjacent time comprises: Acquiring impedance sensitivity factors under nodes at all moments in the preset time period, wherein the impedance sensitivity factors represent the affected degree of impedance; And determining target parameter information of a node at the next moment according to the impedance sensitivity factor under the node at each moment in the preset time period, the voltage information and the power information of the load node under the node at each moment and the connection weight information corresponding to each adjacent moment.
4. A method according to claim 3, characterized in that the impedance sensitivity factor is characterized by: ; Wherein the said Representing the impedance sensitivity factor, the Indicating the time of day, said And representing a preset initial impedance sensitivity factor, wherein alpha is a preset parameter.
5. A method according to claim 3, wherein determining the target parameter information of the next time node according to the impedance sensitivity factor under each time node in the preset time period, the voltage information and the power information of the load node under each time node, and the connection weight information corresponding to each adjacent time comprises: Determining connection relation information corresponding to adjacent moments according to the connection weight information corresponding to the adjacent moments, wherein the connection relation information represents whether edge connection exists between moment nodes in the adjacent moments or not; and determining the target parameter information of the next time node according to the connection relation information corresponding to the adjacent time, the impedance sensitivity factor under each time node in the preset time period, and the voltage information and the power information of the load node under each time node.
6. The method according to claim 5, wherein determining the target parameter information of the next time node according to the connection relation information corresponding to the adjacent time, the impedance sensitivity factor under each time node in the preset time period, the voltage information and the power information of the load node under each time node, comprises: If edge connection exists between the time nodes in the adjacent time according to the connection relation information corresponding to the adjacent time, determining a connection coefficient corresponding to the adjacent time according to the impedance amplitude corresponding to the adjacent time and the impedance sensitivity factor of the time node at the next time in the adjacent time, wherein the connection coefficient represents the association degree between the two time nodes at the next time in the adjacent time; And determining the target parameter information of the node at the next moment according to the connection coefficient corresponding to each adjacent moment, the voltage information and the power information of the load node at each moment node.
7. The method of claim 1, wherein determining the type of the load node based on the target parameter information comprises: determining probability values of the load nodes under various types according to the target parameter information; and determining the type of the load node according to the probability value under each type.
8. The method of claim 7, wherein the probability value is characterized by: ; Wherein the said Representing a probability that the type of the load node under the next moment node is the kth type, wherein y represents that the type of the load node under the next moment node is the kth type, and the probability that the type of the load node under the next moment node is the kth type Representing that the load node is a frequency matrix of the kth type under each moment node in the preset time period, wherein the load node is a frequency matrix of the kth type under each moment node in the preset time period Representing that the load node is a transposed matrix of a frequency matrix of a kth type under each moment node in the preset time period, the transposed matrix being a matrix of a frequency matrix of a kth type under each moment node in the preset time period Indicating that the load node is a c-th type frequency matrix under each moment node in the preset time period, the said Representing that the load node is a transposed matrix of a c-th type frequency matrix under each moment node in the preset time period, Representing the target parameter information.
9. The method according to any one of claims 1-8, further comprising: Determining a line loss calculation strategy corresponding to the type of the load node according to a preset association relation, wherein the preset association relation represents the association relation between the type of the load node and the line loss calculation strategy, and the line loss calculation strategy is used for calculating a line loss result of the load node.
10. A power distribution network-based determination apparatus for a type of load node, comprising: The power distribution network comprises an acquisition unit, a power distribution unit and a control unit, wherein the acquisition unit is used for acquiring electrical parameter information of a load node in the power distribution network at each moment node in a preset time period, and the electrical parameter information comprises at least one of voltage information, power information and impedance information; The first determining unit is used for determining connection weight information corresponding to adjacent time according to impedance information corresponding to each time node in the adjacent time, wherein the connection weight information represents the possibility of connection between the time nodes in the adjacent time; The second determining unit is used for determining target parameter information of the next moment node according to the voltage information and the power information of the load node at each moment node in a preset time period and the connection weight information corresponding to each adjacent moment, wherein the target parameter information comprises the voltage information and the power information of the next moment node; and the third determining unit is used for determining the type of the load node according to the target parameter information.
11. An electronic device is characterized by comprising a memory and a processor; The memory stores computer-executable instructions; the processor executing computer-executable instructions stored in the memory, causing the processor to perform the method of any one of claims 1-9.
12. A computer readable storage medium having stored therein computer executable instructions which when executed by a processor are adapted to carry out the method of any one of claims 1-9.
13. A computer program product comprising a computer program which, when executed by a processor, implements the method of any of claims 1-9.

Description

Method, device and equipment for determining type of load node based on power distribution network Technical Field The present application relates to the field of power systems, and in particular, to a method, an apparatus, and a device for determining a type of a load node based on a power distribution network. Background The load nodes in the power distribution network are generally numerous and complex in distribution, and meanwhile, in an actual power grid operation environment, most load nodes do not have the condition of measuring and recording operation parameters, namely the load nodes do not have the capability of measuring and recording the operation parameters, and the line loss condition of power under the load nodes in the transmission process cannot be effectively determined. In the prior art, the load nodes are classified, and corresponding line loss calculation strategies are selected according to the types of the load nodes, so that the line loss conditions of the power under the load nodes in the transmission process are calculated by using the line loss calculation strategies, however, certain data support is required for classifying the load nodes, and the reliability of classifying the load nodes is poor at present. Therefore, there is currently a problem that the reliability of determining the type of load node of the power distribution network is poor. Disclosure of Invention The application provides a method, a device and equipment for determining the type of a load node based on a power distribution network, which are used for solving the technical problem of poor reliability of determining the type of the load node of the power distribution network. In a first aspect, the present application provides a method for determining a type of a load node based on a power distribution network, including: Acquiring electrical parameter information of load nodes in the power distribution network at each moment node in a preset time period, wherein the electrical parameter information comprises at least one of voltage information, power information and impedance information; determining connection weight information corresponding to adjacent moments according to impedance information corresponding to each moment node in the adjacent moments, wherein the connection weight information characterizes the possibility of connection between the moment nodes in the adjacent moments; Determining target parameter information of a node at the next moment according to voltage information and power information of the load node at each moment in a preset time period and connection weight information corresponding to each adjacent moment, wherein the target parameter information comprises the voltage information and the power information of the node at the next moment; and determining the type of the load node according to the target parameter information. Optionally, the method for determining the connection weight information corresponding to the adjacent time according to the impedance information corresponding to each time node in the adjacent time includes: Determining the impedance amplitude value corresponding to the load node at the adjacent moment according to the impedance information corresponding to the load node at each moment in the adjacent moment, wherein the impedance amplitude value represents the change of the impedance information; and determining connection weight information corresponding to the adjacent moment according to the impedance amplitude value of the load node at the adjacent moment, wherein the connection weight information is represented as the inverse of the impedance amplitude value. Optionally, according to the method described above, determining the target parameter information of the node at the next time according to the voltage information and the power information of the load node at each time node in the preset time period and the connection weight information corresponding to each adjacent time, includes: Acquiring impedance sensitivity factors under nodes at all moments in a preset time period, wherein the impedance sensitivity factors represent the affected degree of impedance; And determining target parameter information of the node at the next moment according to the impedance sensitivity factor of the node at each moment in the preset time period, the voltage information and the power information of the load node at each moment and the connection weight information corresponding to each adjacent moment. Alternatively, as in the method above, the impedance sensitivity factor is characterized by: ; Wherein, the Representing the impedance sensitivity factor of the device,The time of day is indicated as such,Representing a preset initial impedance sensitivity factor, and alpha is a preset parameter. Optionally, in the above method, determining the target parameter information of the next time node according to the impedance sensitivity factor under each time node