A Method of Constructing Cascading Fault Sets Based on Maximum Entropy Increase

A technology of cascading faults and construction methods, applied in the field of power systems, can solve the problems of difficulty in ensuring the coverage of fault sets, and inability to specifically screen fault forms.

Active Publication Date: 2020-11-13
STATE GRID FUJIAN ELECTRIC POWER CO LTD +1
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Problems solved by technology

[0003] At present, scholars' research on the construction technology of large blackout fault sets is mainly based on two types of methods, one is based on time domain simulation analysis method, but it relies on manual experience to set a large number of faults, and it is difficult to guarantee the coverage of fault sets; the other is Based on the analysis of complex theory, its advantage is that it can grasp the risk of large-scale blackout accidents in the power grid from a macro perspective, but there are still problems such as the inability to specifically screen the fault form.

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  • A Method of Constructing Cascading Fault Sets Based on Maximum Entropy Increase
  • A Method of Constructing Cascading Fault Sets Based on Maximum Entropy Increase
  • A Method of Constructing Cascading Fault Sets Based on Maximum Entropy Increase

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[0034] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0035] It should be pointed out that the following detailed description is exemplary and is intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0036] It should be noted that the terminology used here is only used to describe specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combi...

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Abstract

The invention relates to a method for constructing a cascading failure set based on maximum entropy increase. The method comprises the steps of firstly establishing typical operation mode data of a power grid to be studied; then calculating a weighted power flow entropy of the power grid in the operation mode; then disconnecting key transmission channels one by one, comparing the weighted power flow entropy level of the power grid after each transmission channel is disconnected, causing that the transmission channel with the maximum entropy value increase serves as lower-level fault, a cascading fault sequence is listed until the weighted power flow entropy of the power grid is greater than or equal to 0.5 or the power flow does not converge. The accurate identification of key branches inthe process of constructing the grid cascading failure set can be achieved.

Description

technical field [0001] The invention relates to the field of power systems, in particular to a method for constructing a cascading fault set based on maximum entropy increase. Background technique [0002] The occurrence of blackout accidents will cause great losses to social production and residents' lives. In-depth research on the propagation and development mechanism of cascading faults in power systems is of great significance to power grid planning, power grid operation decision-making, and accident handling. Through the analysis of the common characteristics of many major blackouts at home and abroad in recent years, the large-scale power flow transfer in the system caused by one (or multiple) line faults makes other lines on the parallel transmission channel overloaded or protection malfunctions and disconnected one after another , a series of chain reactions stimulate the system to oscillate and eventually lead to a large-scale power outage or even collapse of the sy...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H7/26H02H3/06
CPCH02H3/06H02H7/262H02J2203/20
Inventor 刘建勋唐晓骏霍启迪吉平余秀月陆颖铨谢岩李可文刘余李晓珺陈萌李陆
Owner STATE GRID FUJIAN ELECTRIC POWER CO LTD
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