Electric power system line weakness evaluation system and method based on multi-attribute analysis

A power system and vulnerability technology, which is applied in the field of power system line vulnerability assessment system based on multi-attribute analysis, can solve problems such as misjudgment of line vulnerability

Active Publication Date: 2016-05-11
NORTHEASTERN UNIV
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  • Abstract
  • Description
  • Claims
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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

Method used

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  • Electric power system line weakness evaluation system and method based on multi-attribute analysis
  • Electric power system line weakness evaluation system and method based on multi-attribute analysis
  • Electric power system line weakness evaluation system and method 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 l...

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Abstract

The invention relates to an electric power system line weakness evaluation system and method based on multi-attribute analysis. The system comprises an EMS information obtaining module, a line topology importance degree calculation module, a line correlation coefficient calculation module, an economic loss calculation module, a hidden failure rate calculation module, a line integral weakness calculation module and a weak line screening module. The method comprises the following steps of obtaining trend information and historical information of each line in an electric power system; obtaining the topology importance degree index of each line, the correlation coefficient index of each line, the hidden fault rate index of each line and the economic loss index of each line due to line breaking according to the trend information and the historical information of the line; building an integral weakness index function; performing calculation by using the topology importance degree index, the correlation coefficient index, the economic loss index and the hidden fault rate index of the line as input data of the integral weakness index function to obtain the integral weakness index of each line; and obtaining the weak line in the electric power system through setting the critical weakness index.

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...

Claims

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Application Information

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Patent Type & Authority Applications(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
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