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Identification method and system for cascading failure critical line of power system

A power system and cascading failure technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of low accuracy of dangerous paths, inability to describe different characteristics of lines, and failure to consider line combinations, etc.

Active Publication Date: 2017-03-22
STATE GRID SICHUAN ELECTRIC POWER CORP ELECTRIC POWER RES INST +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] To sum up, the main disadvantage of the existing technology is that the line combination is not considered, and the accuracy of identifying dangerous paths is not high
Furthermore, a single metric cannot describe the different characteristics of the line under different conditions

Method used

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  • Identification method and system for cascading failure critical line of power system
  • Identification method and system for cascading failure critical line of power system
  • Identification method and system for cascading failure critical line of power system

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Embodiment 2

[0187] The present invention also provides an identification system for vulnerable lines of cascading faults in power systems, such as Figure 4 As shown, it specifically includes: a Markov model building module 401, a fault path acquisition module 402, a fault risk Q matrix generation module 403, a high-risk fault path in the power system and a high-risk fault path location determination module 404.

[0188] Wherein, the Markov model establishment module 401 is used to establish a Markov model based on deliberate attack; the elements in the Markov model include state S, action A, strategy I, state transition probability T, load loss R and discount factor γ;

[0189] The fault path obtaining module 402 is configured to obtain a fault path in the power system; specifically includes:

[0190] The power grid N-1 system enters the self-organizing critical value state judging unit, which is used to randomly disconnect any transmission line in the power grid, judge whether the powe...

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Abstract

The invention provides an identification method and system for a cascading failure critical line of a power system. The method comprises the steps of establishing a Markov model based on an intentional attack; obtaining a failure path in the power system; generating a failure risk Q matrix according to the Markov model and the failure path; and determining a high risk failure path in the power system and a position of the high risk failure path according to the failure risk Q matrix. According to the method and the system, the line combinations in the power system are taken into full consideration; and the accuracy of identifying the high risk failure path is improved.

Description

technical field [0001] The invention relates to the technical field of identification of vulnerable lines with cascading faults, in particular to a method and system for identifying vulnerable lines with cascading faults in a power system. Background technique [0002] Vulnerable line (key line, critical line): There are a few lines in the power grid, which play a key role in the development of cascading failures. If these lines fail and cease to operate, the performance of the system will be greatly reduced or even collapsed directly. [0003] The cascading failure of the power system is a chain reaction in which a series of other components fail due to the failure of a certain component in the system. It is an accident with a low probability of occurrence but extremely serious hazards. Severe cascading failures of the power system will lead to the disconnection of the entire power network, causing large-scale power outages, and bringing great economic losses to the socie...

Claims

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Application Information

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IPC IPC(8): G06F19/00
CPCG16Z99/00
Inventor 魏巍黄少伟张至美孙昕伟丁理杰陈颖周波
Owner STATE GRID SICHUAN ELECTRIC POWER CORP ELECTRIC POWER RES INST
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