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System and method for evaluating power system line vulnerability based on multi-attribute analysis

A power system and evaluation system technology, applied in data processing applications, predictions, instruments, etc., can solve problems such as misjudgment of line fragility

Active Publication Date: 2019-10-11
NORTHEASTERN UNIV LIAONING
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Problems solved by technology

[0003] Aiming at the vulnerability assessment of the line, a series of research work has also been carried out at home and abroad, but in the existing technology, it usually only studies and calculates a single index, so it is easy to lead to misjudgment of the vulnerability of the line

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  • System and method for evaluating power system line vulnerability based on multi-attribute analysis
  • System and method for evaluating power system line vulnerability based on multi-attribute analysis
  • System and method for evaluating power system line vulnerability based on multi-attribute analysis

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Embodiment Construction

[0058] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0059] In this embodiment, take the IEEE9 node system as an example, such as figure 1 As shown, by communicating with the EMS system, the failure time of each line, the number of emergency repairs of each line, the total number of repairs of each line, the time from malfunction to The average recovery time, the average time from rejection to recovery of each line, the apparent power of each line during normal operation and the apparent power of the line when the power system fails.

[0060] The numbers of each line in the IEEE9 node system are shown in Table 1:

[0061] Table 1 IEEE9 node system in each line number

[0062] The beginning and end of the bus 1-4 4-5 5-6 3-6 6-7 7-8 8-2 8-9 9-4 line number 1 2 3 4 5 6 7 8 9

[0063] A power system line vulnerability assessment system based on multi-attr...

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Abstract

The invention relates to a power system line vulnerability assessment system and method based on multi-attribute analysis. The system includes an EMS information acquisition module, a line topology importance calculation module, a line correlation coefficient calculation module, an economic loss calculation module, and a hidden failure rate calculation module. , line comprehensive vulnerability calculation module and vulnerable line screening module; this method is to obtain the power flow information and historical information of each line in the power system, and obtain the topological importance index and correlation coefficient index of each line based on the power flow information and historical information of the line. Hidden failure rate index, as well as the economic loss index caused by disconnection of the line, a comprehensive vulnerability index function is established, and the topological importance index, correlation coefficient index, economic loss index and hidden failure rate index of the line are used as the comprehensive vulnerability index. The input data of the function is used to calculate the comprehensive vulnerability index of each line. By setting the critical vulnerability index, the vulnerable lines in the power system are obtained.

Description

technical field [0001] The invention belongs to the technical field of power system steady-state analysis, and in particular relates to a system and method for evaluating the vulnerability of power system lines based on multi-attribute analysis. Background technique [0002] In recent years, power system blackouts have occurred frequently around the world, causing serious social impacts and huge economic losses, and have aroused people's attention to the transmission mechanism of grid cascading failures and the vulnerability of power systems. In the initial stage of a major blackout, a small number of components often fail one after another, and in the stage of accident expansion, it is closely related to the weak links in the power system. Therefore, from the perspective of preventing large-scale blackouts, identifying vulnerable lines in the power system has an important guiding role in strengthening the topological stability of the region, improving the reliability of the...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/04G06Q50/06
Inventor 张化光杨珺刘鑫蕊刘邓孙秋野王智良杨东升汪刚
Owner NORTHEASTERN UNIV LIAONING
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