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Method, device and electronic equipment for key section identification of power grid

A key section and identification method technology, which is applied in the direction of circuit devices, AC network circuits, and AC networks with the same frequency from different sources, can solve the problem of low identification accuracy of key sections

Active Publication Date: 2020-11-10
GUANGDONG POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the existing laplace matrix spectral clustering method, the power grid is regarded as an undirected graph, which is inconsistent with the actual power grid with power transmission direction; while in the transmission betweenness method based on complex networks, because the transmission medium is generally affected by the electrical parameters Influenced by changes, the recognition accuracy of key sections calculated by this method is low

Method used

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  • Method, device and electronic equipment for key section identification of power grid
  • Method, device and electronic equipment for key section identification of power grid
  • Method, device and electronic equipment for key section identification of power grid

Examples

Experimental program
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Effect test

Embodiment 1

[0063] figure 1 A method for identifying a key section of a power grid is shown, the method is applied in the process of identifying a key section of a power grid, and can be implemented by a related processor. Such as figure 1 As shown, the method includes steps S1-S7, specifically as follows:

[0064] Step S1, establishing a grid model of the grid to be identified.

[0065] In step S2, the grid topology graph with the power flow transmission direction is used as a directed topology graph, and a laplace matrix of the grid model is established.

[0066] Step S3, divide the grid to be identified into multiple regions according to the eigenvectors of the laplace matrix.

[0067] Step S4, obtaining a probabilistic power flow model, which is used to represent uncertainties due to power generation, load and grid operation mode.

[0068] Step S5, according to the node power flow equation, the branch power flow equation and the probabilistic power flow model, determine the probab...

Embodiment 2

[0105] Corresponding to a method for identifying a key section of a power grid in the above embodiments, an embodiment of the present invention also provides a device for identifying a key section of a power grid, see image 3 , the device consists of:

[0106] A model building module 11, configured to set up a grid model of the grid to be identified;

[0107] The matrix building module 12 is used to use the grid topology graph with the power flow transmission direction as a directed topology graph to establish a laplace matrix of the grid model;

[0108] The area division module 13 is used to divide the power grid to be identified into multiple areas according to the eigenvector of the above-mentioned laplace matrix;

[0109] A model acquisition module 14, configured to acquire a probabilistic power flow model, which is used to represent uncertainties due to power generation, load and grid operation mode;

[0110] The betweenness determining module 15 is used to determine t...

Embodiment 3

[0115] see Figure 4 , the embodiment of the present invention also provides an electronic device 100, including: a processor 40, a memory 41, a bus 42 and a communication interface 43, the processor 40, the communication interface 43 and the memory 41 are connected through the bus 42; Executable modules, such as computer programs, stored in the execution memory 41 .

[0116] Wherein, the memory 41 may include a high-speed random access memory (RAM, Random Access Memory), and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory. The communication connection between the system network element and at least one other network element is realized through at least one communication interface 43 (which may be wired or wireless), and the Internet, wide area network, local network, metropolitan area network, etc. can be used.

[0117] The bus 42 can be an ISA bus, a PCI bus or an EISA bus, etc. The bus can be divided into address bus, data bu...

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Abstract

The invention provides a method and device for identifying a critical section of a power grid and an electronic device. The method comprises a step of establishing a power grid model of a power grid to be identified, a step of taking a power grid topology graph as a directed topology graph to establish a laplace matrix of the power grid model, a step of dividing the power grid to be identified into multiple areas according to a eigenvector of the laplace matrix, a step of obtaining a probabilistic flow model which is used for characterizing an uncertainty due to power generation, a load and agrid operation mode, a step of determining a probabilistic transmission betweenness of a communication line between the various areas according to a node flow equation, a branch flow equation and a probabilistic flow model, a step of obtaining transmission sections between the various areas according to the probabilistic transmission betweenness, and a step of calculating the average load rate ofall the transmission sections between all areas according to the load rates of all the communication lines of the transmission sections and selecting a section with a maximum average load rate as thecritical transmission section. The recognition accuracy of the critical section can be effectively improved through the above mode.

Description

technical field [0001] The invention relates to the technical field of power grid dispatching and operation, in particular to a method, device and electronic equipment for identifying key sections of a power grid. Background technique [0002] With the large-scale grid-connection of large-scale new energy, the randomness and volatility of its power flow are increased while increasing the scale of the grid. On-line monitoring of all nodes in the power system is realistic. Therefore, dividing the system into several areas and monitoring the key sections between each area in a targeted manner has become an inevitable choice for monitoring the operation of the power system. In order to ensure the stable operation of the power grid and prevent the occurrence of power outages, the identification of key sections has gradually become the focus of research issues. [0003] At present, there are many methods for identifying key sections of the power grid, among which the laplace matr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/06
CPCH02J3/06H02J2203/20
Inventor 程涛陈君德曾荣均李启亮刘俊磊刘思捷肖俊沙斌钱峰袁炜灯刘树安黄安平王健华段孟雍
Owner GUANGDONG POWER GRID CO LTD