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Power system cascading failure analysis method based on Markov process

A power system and cascading failure technology, applied in the field of power system cascading failure analysis based on the Markov process, can solve the problems that the evaluation results deviate from reality and ignore the physical characteristics of the power system

Active Publication Date: 2017-01-11
CHINA ELECTRIC POWER RES INST +3
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Problems solved by technology

However, in order to simplify the difficulty of the problem, such probabilistic methods may ignore the actual physical characteristics of the power system and the assessment of the impact on the operating environment of the power grid, making the assessment results deviate from the actual

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  • Power system cascading failure analysis method based on Markov process
  • Power system cascading failure analysis method based on Markov process
  • Power system cascading failure analysis method based on Markov process

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Embodiment Construction

[0066] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0067] The following description and drawings illustrate specific embodiments of the invention sufficiently to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely represent possible variations. Individual components and functions are optional unless explicitly required, and the order of operations may vary. Portions and features of some embodiments may be included in or substituted for those of other embodiments. The scope of embodiments of the present invention includes the full scope of the claims, and all available equivalents of the claims. These embodiments of the present invention may be referred to herein, individually or collectively, by the term "invention", which is for convenience only and is not...

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Abstract

The invention relates to a power system cascading failure analysis model and probability calculation method based on a Markov process. The method comprises the following steps of: differentiating operation characteristics of different components of a power system, and, in combination with state information of the power system, where system components are, analyzing the shutdown probability of the components; considering the correlation between failure events in a cascading failure evolutionary process, describing a cascading failure transfer process through the Markov process, searching a cascading failure event of the system under different initial failure conditions, establishing a cascading failure event model, and generating a power system cascading failure state space in the Markov process; and, analyzing the system transfer probability in a cascading failure state space, and calculating the different-scale cascading failure probability. According to the method disclosed by the invention, while the calculation efficiency is ensured, the cascading failure event of the system under different initial failures is discovered; furthermore, the cascading failure probability is calculated; a corresponding system improvement measure is provided; the cascading failure is prevented; the system risk is reduced; and the power supply capability of the power system is increased.

Description

technical field [0001] The invention relates to an interest settlement method in the field of power system cascading failure risk analysis, in particular to a Markov process-based power system cascading failure analysis method. Background technique [0002] With the continuous expansion of the grid interconnection scale, the risk of cascading failures and causing blackouts is gradually increasing. Cascading failures in power systems refer to the phenomenon that components in the system fail independently and successively, which further weakens the power transmission capacity of the power system. Although the occurrence frequency of such cascading failures and the power system blackout accidents caused by them is extremely low, their impact on society, economy and human life is often incalculable. Therefore, it is of great significance to study the propagation characteristics of cascading faults and establish an accident evolution model to prevent cascading faults and reduce...

Claims

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Application Information

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IPC IPC(8): G06Q10/06G06Q50/06
Inventor 易俊程林孙华东刘满君何剑田浩贺庆卜广全王歆曾兵
Owner CHINA ELECTRIC POWER RES INST
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