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Method for evaluating operational safety of interconnected power grid

A technology for interconnecting power grids and safety, applied in electrical components, circuit devices, AC network circuits, etc.

Inactive Publication Date: 2012-07-25
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0026] However, there is no technical solution for applying gray system theory to power grid security analysis in this field.

Method used

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  • Method for evaluating operational safety of interconnected power grid
  • Method for evaluating operational safety of interconnected power grid
  • Method for evaluating operational safety of interconnected power grid

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Experimental program
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Embodiment Construction

[0061] The technical solution of the present invention will be described in detail below with reference to the drawings and embodiments.

[0062] The security evaluation method for the operation of the interconnected power grid provided in the embodiment may adopt a computer software program to realize an automatic operation process. Such as figure 2 , The steps in the process of the embodiment are as follows:

[0063] Step 1. Calculate the indicators of the power grid and the newly built project in each power grid zone as the original sample data, and construct the sample space.

[0064] Attached figure 1 It is a block diagram of the system structure of the interconnected grid operation safety indicators. Based on this block diagram, the interconnected grids and new projects are ranked in 2010, 2011 and 2012 to evaluate the advantages and disadvantages of the interconnected grids and new projects, and analyze one of the relevant factors affecting the safety of grid operations An...

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Abstract

The invention provides a method for evaluating operational safety of an interconnected power grid. The method includes computing various indexes of the power grid and a new project in each power grid sub-area to be used as original sample data, and constructing a sampling space; adopting the proportion of load of each power grid sub-area to total load of the power grid as an expert weight, obtaining a composite value of each single index by means of weighted computation and using the composite values as sample data; computing the correlation degrees of the various indexes, and obtaining objective weight of the various indexes by means of normalization computing; carrying out normalization based on the objective weights of the various indexes after composite values of the single indexes are computed, and computing correlation coefficients; carrying out weighted computation for the objective weights of the single indexes and the obtained correlation coefficients and obtaining the quality sequence of the power grid and the new project; and obtaining an overall safety index of each power grid sub-area by means of weighted computation according to the objective weights of the indexes, using the overall safety indexes as sample data, computing correlation degrees of each power grid sub-area by the aid of grey correlation analysis, and obtaining the quality sequence of safety of the various power grid sub-areas.

Description

Technical field [0001] The invention relates to the technical field of power transmission and distribution engineering in a power system, and in particular to a safety assessment method for the operation of an interconnected power grid. Background technique [0002] Electricity is an important industry and key area of ​​the national economy, which is related to the national economy, people's livelihood and energy security. Power generation and power supply companies bear the major responsibility of providing safe, economic, clean, efficient and sustainable power supply for economic and social development, and bear major economic, political and social responsibilities. Measuring the operating efficiency of grid companies not only considers the technical and economic aspects of grid construction, but more importantly lies in the political and social responsibilities of grid construction, that is, the power supply task of ensuring safety, ensuring demand, and improving power supply ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
Inventor 孙元章吴耀文彭晓涛崔明建胡子修李俊杨军宋伶俐王江虹韩文长刘焱
Owner STATE GRID CORP OF CHINA
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