Electric power communication network key node and influence domain analysis method

Abstract

The invention discloses a key node and influence domain analysis method for a power communication network, and the method comprises the steps: building a communication channel reliability model of communication interruption according to components of communication equipment in the power communication network and a safety and stability control device; analyzing the probability of communication service caused by high delay of the communication channel, and establishing a communication channel reliability model based on communication channel delay probability distribution; establishing a system protection communication channel reliability model comprehensively considering communication interruption and communication delay, acquiring the subjective weight of each index of the communication service through an analytic hierarchy process, and obtaining the objective weight of each index through an entropy weight method; obtaining a comprehensive weight according to the subjective weight and the objective weight, and determining the importance of each node and the communication link according to the importance of each index and the corresponding comprehensive weight; and obtaining the influence domains of the communication link and the communication node through an influence domain analysis method of the communication node and the communication link. According to the invention, the reliability of the communication channel of the power communication network can be evaluated more accurately.

Description

technical field [0001] The invention relates to the technical field of smart grids, in particular to a method for analyzing key nodes and influence domains of a power communication network. Background technique [0002] With the rapid development of smart grid technology, the power system has gradually become a space-time multi-dimensional heterogeneous system in which the information system and the power system are deeply integrated, that is, the power cyber-physical fusion system. As an important link, the high-speed, reliable and safe power communication network provides technical support for the reliable operation of the power system. The real-time monitoring, protection and control services of the power system transmitted by the power communication network can monitor and prevent the early development of power system failures and keep the power grid safe and reliable. However, the failure of the communication system (such as interruption, delay or bit error, etc.) will...

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Problems solved by technology

Although this kind of research can be used to explain the occurrence and development process of large-scale cascading failures at the macro level, it is not suitable for direct system operation control due to excessive neglect of the physical nature of the two networks.

And based on the vulnerability index of direct information physical dependence network DCPI: this type of research believes that the failure of communication components will cause the complete failure of its corresponding power system components

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