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Voltage stabilization fault screening and ranking method based on grey correlation analysis method

A voltage stabilization and fault screening technology, applied in the field of power systems, can solve the problems of lack of comprehensive fault characteristics and single method

Active Publication Date: 2016-10-26
STATE GRID CORP OF CHINA +4
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Problems solved by technology

[0004] At present, there are many fault screening and sorting methods, most of which use the power flow solutions before and after the accident to evaluate the severity of the fault. The method is relatively simple and is slightly lacking in fully reflecting the fault characteristics.

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  • Voltage stabilization fault screening and ranking method based on grey correlation analysis method
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  • Voltage stabilization fault screening and ranking method based on grey correlation analysis method

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Embodiment Construction

[0073] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0074] Such as figure 1 As shown, the present invention provides a method for screening and sorting voltage stability faults based on gray relational analysis, comprising the following steps:

[0075] Step 1. Determine the indicators of the severity of voltage stability faults in the power system;

[0076] Step 2. Calculate the value of each index;

[0077] Step 3. Form an initialization decision matrix according to each index;

[0078] Step 4. Standardiz...

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Abstract

The invention provides a voltage stabilization fault screening and ranking method based on a grey correlation analysis method, which comprises the steps of determining indexes for the severity of voltage stabilization faults in an electric power system; calculating to acquire values of the indexes; forming an initialization decision-making matrix according to the indexes; standardizing the initialization decision-making matrix to acquire a standardization decision-making matrix; calculating a correlation coefficient and a grey correlation degree according to the grey correlation analysis method; and screening to acquire a fault screening comprehensive index, and acquiring a fault severity ranking result according to the fault screening comprehensive index. The method provided by the invention reflects fault severity conditions more comprehensively and more effectively, thereby being convenient for the operating and scheduling personnel to take correspondingly prevention and correction measures timely, reducing influences imposed on power grid voltage stabilization by accident disturbance, and having important significance for guiding reliable running of an actual power grid.

Description

technical field [0001] The invention relates to the field of power systems, in particular to a method for screening and sorting voltage stability faults based on a gray relational analysis method. Background technique [0002] In power system operation and planning, it is a basic task to analyze the voltage stability of the system under various accident conditions. In recent years, due to many blackouts caused by voltage stability problems, the safety assessment of voltage stability has attracted more and more attention from operators and researchers, which also puts forward higher requirements for the methods and results of voltage stability analysis. One of the important contents of voltage stability analysis is fault screening and sorting. In a complex power system, the number of expected faults is huge, but for a certain operation mode, only a small part of the faults have a great impact on the stability of the system, which are serious faults and need to be further stu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/0635G06Q50/06Y02E40/30
Inventor 张文朝党杰王少博徐友平陆勇韩军朱国平奚江惠潘晓杰潘艳
Owner STATE GRID CORP OF CHINA
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