Method for identifying physical faults and information faults of power distribution network

Abstract

The invention proposes a method for identifying physical faults and information faults of a distribution network. The basic idea of ​​the present invention is to preprocess and fuse the data uploaded by the intelligent terminal in the distribution network to establish a high-dimensional space-time state monitoring matrix, and after the matrix is ​​subjected to multi-dimensional scale analysis and dimensionality reduction, outlier detection is performed on it. Obtain the LOF value of each node, on this basis, the detection of faults in the smart distribution network can be realized, and then according to the LOF value of the generalized nodes, it can be identified whether the fault is a power fault in the distribution network or a communication node fault; further, combined with multi-dimensional scale The analysis and visualization results of outlier detection enable the location of distribution network fault areas and fault communication nodes. The invention can not only effectively detect the fault of the intelligent distribution network, but also locate the fault area and the fault communication node of the distribution network.

Description

technical field [0001] The invention relates to the field of intelligent distribution network protection, in particular to a method for identifying physical faults and information faults of a distribution network. Background technique [0002] The integration of cyber-physical system technology is an effective way to deal with the increasingly complex structure of distribution network and the substantial improvement of power informationization, but it also raises new problems. In the smart distribution network, the information system and the physical system are highly coupled, and both the information system failure and the physical failure of the distribution network will threaten the safe and stable operation of the system. However, previous studies on power communication networks were basically fragmented, and the research methods and modeling methods did not fully consider the interaction between the physical system and the communication system, especially the impact of ...

AI Technical Summary

Problems solved by technology

However, previous studies on power communication networks were basically fragmented, and the research methods and modeling methods did not fully consider the interaction between the physical system and the communication system, especially the impact of the interaction on the protection and control of the smart distribution network. mentioned

[0003] If the distribution network line fails, the amount of transmitted data will increase sharply, which may lead to excessive load on the information system, cause network congestion, increase information transmission delay and bit error rate of information processing, and easily lead to misoperation or rejection of smart terminals. movement, which will cause the expansion of faults or unnecessary power outages, and the possibility of cascading faults will be induced if it is not handled in time

In addition, communication channel failures, information component failures, information transmission failures, and external malicious attacks will all affect the normal operation and protection and control performance of the entire smart distribution network, and will lead to system paralysis in severe cases.

Therefore, the failure of both the information system and the physical system will pose a threat to the economical and reliable operation of the smart distribution network.

[0004] However, due to the high degree of coupling between the physical system and the information system, it is difficult to identify whether it is a power failure or an information system failure

Domestic and foreign research on this aspect is not detailed enough or separated, and it is impossible to uniformly identify power faults and information system faults. More in-depth and comprehensive research is needed.

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