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Power grid balance evaluation method

A technology of power grid balance and evaluation method, applied in data processing applications, instruments, calculations, etc., can solve problems such as power grid losses and cascading failures

Inactive Publication Date: 2016-02-03
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The literature "Vulnerability Assessment of Large Power System Based on Directed Weight Graph and Complex Network Theory" (Author: Zhang Guohua, Zhang Jianhua, Yang Jingyan, etc.; Source: Electric Power Automation Equipment, 2009, 29(4): 21-26) analyzes the The ability to withstand disturbances under random attacks and deliberate attacks. The results show that once the hub nodes and lines in the power grid fail, it may cause large-scale cascading failures and cause serious losses to the power grid.

Method used

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Embodiment Construction

[0071] In order to facilitate the skilled person to understand and implement the present invention, the embodiments of the present invention are now described with reference to the accompanying drawings. figure 1 The Southern Brazilian 46-busnetwork shown in the figure is an international power transmission planning and testing system. figure 2 There are two planned expansion schemes of the system shown. The path marked by the dotted line is the expanded line path. Among them, scheme 0 is a comparison scheme with 46 nodes and 94 branches; scheme 1 has 46 nodes and 85 branches. Realize that the specific implementation steps of the present invention are as follows:

[0072] 1. Calculate the relevant indicators of each node and each branch of the power grid. The calculation results of part 0 of the scheme are as follows:

[0073]

[0074]

[0075] 2. Calculate the node importance index of each node and the branch importance index of each branch. The node importance of nod...

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Abstract

The invention discloses a power grid balance evaluation method, and relates to the field of power grid planning evaluation. The method establishes a series of indexes of power grid key node and key branch identification from angles of the number of degrees and betweenness, and through calculation of a node importance evaluation index and a branch importance evaluation index, key nodes and key branches are obtained. On this basis, a method for evaluating power grid balance from two angles of node and branch function balance in a power gird and key node and key branch space balance is proposed. The power grid balance evaluation method provided by the invention has the advantage that the provided method can evaluate the heterogeneity degree of the power grid from the angle of balance of nodes and branches in the power grid in function and structure, reflects the fragile degree of the power grid itself, provides a new approach to quantitative evaluation of safety of a planned power grid, and has very good practical value.

Description

technical field [0001] The invention belongs to the field of grid planning evaluation, and in particular relates to a grid balance evaluation method. Background technique [0002] During the operation of the power grid, it is inevitable to suffer from different sources and different types of disturbances, which will affect the operation status of the power grid if it is mild, and cause great impact and damage to the power grid if it is serious. Different degrees of consequences are not only related to external factors such as various disturbances, but also related to the vulnerability of the grid itself. The power grid balance reflects the balance of the importance of nodes and branches in the power grid and the balance of the spatial distribution of key nodes and key branches. A power grid with better balance has a stronger ability to maintain stable operation of the system when dealing with different disturbances such as intentional attacks and random attacks that may be ...

Claims

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Application Information

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IPC IPC(8): G06Q50/06
Inventor 徐敬友卓毅鑫黄家祺罗纯坚周旋乔立
Owner STATE GRID CORP OF CHINA
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