Electrical power system fragile section identification method based on normalized-cut

A fragile section and power system technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as system power flow transfer, endangering the safe operation of the system, and branch overload safety and stability.

Inactive Publication Date: 2013-05-08
TIANJIN UNIV
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Problems solved by technology

When the line in this section fails, it is very easy to damage the power transmission channel of the power grid, causing the power flow transfer in the system, prone to safety and stability problems such as branch circuit overload, and endangering the safe operation of the system

Method used

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  • Electrical power system fragile section identification method based on normalized-cut
  • Electrical power system fragile section identification method based on normalized-cut
  • Electrical power system fragile section identification method based on normalized-cut

Examples

Experimental program
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Embodiment 1

[0084] Example 1: Fragile Section Analysis of IEEE30 Node Calculation System

[0085] The first step is to calculate the power flow distribution of the power grid, and use the power system branch weighting method based on electrical distance and power flow distribution to establish an applicable power system weighting graph model. Table 1 lists the node output power in the embodiment of the IEEE 30-node system, Table 2 lists the line parameters and power flow distribution of the IEEE 30-node system, and Table 3 lists the weights of the lines in the graphical model.

[0086] Table 1 Node output power of IEEE 30-node system

[0087]

[0088] Table 2 Line parameters and power flow distribution of IEEE 30-node system

[0089]

[0090]

[0091] Table 3 Weights of lines in IEEE 30-node system diagram model

[0092]

[0093]

[0094] The second step is to establish the Laplacian matrix and degree matrix of the abstract model of the power system graph theory, and calc...

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Abstract

The invention relates to the technical field of electrical power system static status safety analysis and on-line monitoring, and provides a quick method of identifying an electrical power system fragile section. An electrical power system fragile section identification method based on normalized-cut has important guiding significance for the establishment of an effective prevention and control measure and an islanding control strategy. The electrical power system fragile section identification method based on the normalized-cut comprises a first step of establishing a suitable electrical power system graph theory model, a second step of establishing a laplacian matrix and a similarity matrix of the electrical power system graph theory model, a third step of forming corresponding split guiding vectors, searching corresponding sections of the split guiding vectors in a heuristic mode, a forth step of building an objective function regarding to the split guiding vectors based on the normalized-cut mode, calculating the objective function of each of the split guiding vectors, and a fifth step of screening a split guiding vector which enables the objective function to obtain the minimum value, determining the section corresponding to the split guiding vector to be a fragile section. The electrical power system fragile section identification method based on the normalized-cut is mainly applied to the electrical power system static status safety analysis and on-line monitoring.

Description

technical field [0001] The invention relates to the technical field of static safety analysis and on-line monitoring of power systems, in particular, to a method for identifying vulnerable sections of power systems based on normative cuts. Background technique [0002] In order to ensure the safe and stable operation of the power system, some important characteristics that characterize the system security need to be analyzed and monitored in real time. Critical section is an important form of characterizing system security. Therefore, for many years, key sections have been one of the focuses of power grid analysts and dispatchers, and their identification methods have also been greatly developed during the development of power grids. [0003] At present, the identification methods of key sections in the power system mainly include the following three categories: [0004] 1. The identification method of transmission section based on interregional tie line. This type of met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 赵金利李媛媛贾宏杰
Owner TIANJIN UNIV
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