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Comprehensive evaluation method on safety of grid structure based on entropy weight method

A technology for comprehensive evaluation and power grid structure, applied in the field of power system, which can solve problems such as inconsistency of the actual situation of the power grid

Active Publication Date: 2013-05-15
CHINA ELECTRIC POWER RES INST +1
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  • Abstract
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  • Application Information

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Problems solved by technology

In general, most of the existing research is based on a single global index or local index to measure the security of the complex structure of the transmission network. The actual situation does not match

Method used

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  • Comprehensive evaluation method on safety of grid structure based on entropy weight method
  • Comprehensive evaluation method on safety of grid structure based on entropy weight method
  • Comprehensive evaluation method on safety of grid structure based on entropy weight method

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Embodiment Construction

[0057] The specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0058] In this embodiment, on the basis of fully considering the electrical characteristics of the transmission grid itself, an improved modeling method for the complex network of the transmission grid is proposed. From different perspectives of the grid structure, four aspects of the grid transmission efficiency, transmission capacity, path adequacy and node topology entropy are proposed. Evaluation index, the comprehensive evaluation index based on entropy weight method can comprehensively consider the structural safety of the power grid from different angles, and draw more practical evaluation conclusions.

[0059] In order to achieve the above objective, this embodiment adopts the following technical solutions to achieve:

[0060] (1) Modeling the structure of the transmission network;

[0061] Transmission lines and transformer branch...

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Abstract

The invention discloses a comprehensive evaluation method on safety of a grid structure based on an entropy weight method, and is used for evaluating the integral security of the grid structure from multiple angles by combing complicated grid evaluation indexes. Firstly, a transmission grid structure model is established by combing electrical characteristics of the transmission grid closely in order to solve the problem that the existing transmission grid is too simple, secondly, providing such global indexes as grid transmission efficiency, grid transmission capacity and transmission path adequacy which represent the whole transmission performance of the grid by combing electrical characteristics of the grid, and providing grid node topological entropy to measure communication balance of the grid nodes based on degrees, weighted degrees and the like, and lastly normalizing the indexes with the entropy weight method and confirming the weighted value of each index. The comprehensive evaluation method overcomes the defects of grid structure safety evaluation with single evaluation index, and fits actual condition of an electric power project.

Description

Technical field [0001] The invention belongs to the technical field of power systems, and specifically relates to a method for comprehensive evaluation of the safety of a power grid structure based on an entropy method. Background technique [0002] The power system is a typical complex network. The structure of the transmission grid, that is, the way in which the busbars and transmission lines connect generator nodes and load nodes, is one of the key factors that determine the safe and stable operation of the power system. In recent years, complexity science, especially the use of complex network theory to analyze the complex characteristics of power grid structure, has become a research hotspot at home and abroad. The security evaluation of power grid structure is an important branch of the application research of complex networks in power systems. [0003] At present, the general indicators to measure the structural performance of the transmission grid mainly include: 1) Global...

Claims

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Application Information

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IPC IPC(8): H02J3/00
Inventor 王珂杨胜春李峰
Owner CHINA ELECTRIC POWER RES INST
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