Vulnerable line identification method and system of power system

A technology of power system and identification method, which is applied in the direction of circuit devices, AC network circuits, electrical components, etc., can solve the problems of not considering correlation and affecting the accuracy of fragile line identification results, and achieve the effect of improving effectiveness and accuracy

Inactive Publication Date: 2016-12-21
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology

If the correlation between transmission lines under disturbance information is not considered, then this will seriously affect the accuracy of vulnerable line identification results

Method used

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  • Vulnerable line identification method and system of power system
  • Vulnerable line identification method and system of power system
  • Vulnerable line identification method and system of power system

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Embodiment Construction

[0031] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The method of the present invention fully considers the dynamic characteristics of power transfer and transmission capacity conversion after the power grid responds to a fault under disturbance information. At the same time, the invention transforms the identification of vulnerable lines in complex power grids into the evaluation of key nodes in the correlation network, so as to achieve the purpose of accurate identification of vulnerable lines.

[0032] Such as figure 1 As shown, the method for identifying vulnerable lines in a power system in this embodiment includes the following steps:

[0033] Step S101: Count the total number of grid lines and number them sequentially;

[0034] All the transmission lines in the power grid are sequentially numbered from 1 to n (the total number of lines); the purpose of numbering the lines is to det...

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Abstract

The invention discloses a vulnerable line identification method and system of a power system. The method comprises the following steps of counting the total number of power grid circuits, and sequentially numbering the power grid circuits; generating (N-1) safety verification based correlation matrix of each circuit state; building a correlation network based on the correlation matrix; estimating key nodes in the correlation network according to a preset identification method, and forming a sorting list of the key nodes; and acquiring a vulnerable line of the power system according to a node number in the correlation network and a corresponding relation of the number of a power transmission line in an actual power grid. The system comprises a numbering module, a verification module, a processing module and a sequencing module. By the method and the system, the vulnerable line affecting safe and stable running of the power grid is effectively and accurately identified, a positive and defensive measure is taken afterwards, and a power-off risk brought by a blackout accident is reduced to the greatest extent.

Description

technical field [0001] The invention relates to the field of risk assessment of power system lines, in particular to a method and system for identifying vulnerable lines in a power system. Background technique [0002] The power system is a huge dynamic and nonlinear man-made network, and the high complexity of the topological structure and operation mode increases the operation risk of the power grid. Affected by factors such as operating equipment failure, human misoperation, and bad weather, the power system is prone to one or more point failures, and may induce cascading blackouts in the power system. In the occurrence and development of blackout accidents, vulnerable lines play an important role and play a role in fueling the flames. Therefore, identifying vulnerable lines from the perspective of cascading faults can not only enable dispatchers to grasp the weak links in the power grid in a timely and accurate manner, but also provide powerful technical guidance for fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
CPCH02J3/00H02J2203/20
Inventor 范文礼刘志刚韩志伟宋洋
Owner SOUTHWEST JIAOTONG UNIV
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