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Power outage influence comprehensive evaluation method based on improved extension theory

A comprehensive evaluation, theoretical technique, applied in the field of electric power

Inactive Publication Date: 2018-11-13
CHINA SOUTHERN POWER GRID COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] To sum up, although many comprehensive evaluation methods have been applied in power system blackout events, the comprehensiveness, accuracy and adaptability of the evaluation methods under the new situation still need more in-depth research.

Method used

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  • Power outage influence comprehensive evaluation method based on improved extension theory
  • Power outage influence comprehensive evaluation method based on improved extension theory
  • Power outage influence comprehensive evaluation method based on improved extension theory

Examples

Experimental program
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Effect test

Embodiment 1

[0070] Such as figure 1 As shown, a comprehensive evaluation method of power outage impact based on improved extension theory, the specific steps are as follows:

[0071] Step 1. Matter-element setting of power outage impact evaluation. In the power outage impact assessment, the value range of indicators corresponding to each power outage impact evaluation level can be expressed through the classical domain, as shown in formula (1):

[0072]

[0073] In the formula, N j is the impact evaluation level of the jth power outage; c 1 ~ c 6 6 indicators of the indicator layer in turn; 1 ,b 1 > means c under the jth evaluation level 1 The value range of the indicator;

[0074] The entire value range of each index in the power outage impact assessment system is represented by the node field, as shown in formula (2):

[0075]

[0076] In the formula, N represents the overall power outage impact level; 1 ,e 1 > means c 1 The range of values ​​for all evaluation levels of ;...

Embodiment 2

[0123] Take the blackout event of two 110kV substations in Guangdong Power Grid as an example. The statistical data of blackout events and the parameters of substations are shown in Table 2, and the classification and corresponding standards of each index are shown in Table 3, where k1~k5 represent the five assessment levels of minor, slight, serious, relatively serious and extremely serious in turn. In order to improve comparability, the grading standard value and statistical value of each indicator are converted into per unit value. The benchmark values ​​used are taken from the substation parameters in Table 2, where the benchmark of the importance classification index is the total number of users of this type brought by the substation, the time benchmark is 30 days, and the power benchmark is the capacity of the substation. The standard of evaluation level is mainly based on the statistical data and expert opinions of most of the 110kV substations in the past.

[0124] Ta...

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Abstract

The invention discloses a power outage influence comprehensive evaluation method based on improved extension theory. The method comprises three loops: a power outage influence evaluation matter element setting, association matrix computation and power outage influence comprehensive evaluation; a fuzzy set in an extension set theory is combined with an analytic hierarchy process to form a judgmentmatrix for representing the index relative importance by utilizing multiple experts, and the weight value of each index is computed according to the judgment matrix, thereby forming the comprehensivejudgment on the influence condition of the power outage event; and then, the comprehensive judgment matrix in the method is obtained by performing equal-weight summation through the judgment matrixesof various experts, if the cognitive level of individual expert is much different from other expert or the consistency problem is existent between the judgment matrixes, the consistency of the comprehensive judgment matrix can be influenced, and the reasonable weight value is hard to obtain.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a method for comprehensively evaluating the impact of power outages based on improved extension theory. Background technique [0002] The comprehensive evaluation of the severity of blackout events is of great significance to the safe operation of power systems. The impact areas of power outage events are becoming wider and wider, which brings new challenges to the comprehensive assessment of power outage impact. The main issues are as follows: [0003] (1) In terms of research content, as the scale of the power industry increases, more and more areas are affected by power outages, and the quantitative evaluation methods and degrees of importance of each affected area are different. The problem of how to construct an effective and adaptive evaluation method has received more and more attention. Most of the existing evaluation and analysis of power system blackout events...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/06393G06Q50/06
Inventor 周剑罗添允周华锋刘思捷钱峰何超林
Owner CHINA SOUTHERN POWER GRID COMPANY
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