Longitudinal differential protection encryption communication system based on quantum key distribution, and control method

Abstract

The invention discloses a longitudinal differential protection encryption communication system based on quantum key distribution, and a control method, and belongs to the technical field of the quantum communication. The system comprises a quantum key distribution subsystem, an electric-control optical logic operation element, an electric-to-optical conversion module, a photoelectric conversion module, and a sending end and a receiving end of longitudinal differential protection equipment information; the sending end of the longitudinal differential protection equipment information is connected with the electric-to-optical conversion module through a first electric-control optical logic operation element, the receiving end of longitudinal differential protection equipment information is connected with the photoelectric conversion module through a second electric-control optical logic operation element; the output end of the electric-to-optical conversion module is connected with the photoelectric conversion module through an optical fiber channel; the first electric-control optical logic operation element is connected with the second electric-control optical logic operation elementthrough the quantum key distribution subsystem. Therefore, the communication information cannot be eavesdropped and counterfeited by an attacker, and the operation security of the power grid is further improved.

Description

technical field [0001] The invention relates to the technical field of quantum communication, in particular to a longitudinal difference protection encryption communication system and control method based on quantum key distribution. Background technique [0002] There are many types of protection for the power grid and different technologies, which can be divided into multiple protection types according to different standards. However, most protection methods in the power grid are completed independently by each protection device, and there is no need for interactive communication. Only differential protection has interactive communication requirements because its principle is to make logical judgments on data from more than two relay sources. The communication ranges of the lateral difference protection and the main transformer longitudinal difference protection are all within the station, and only the line longitudinal difference protection exists for station-to-station ...

AI Technical Summary

Problems solved by technology

[0005] However, the shortcomings of the three communication methods among the longitudinal differential protection equipment of the power grid are: first, the information is transmitted through the optical fiber channel, the communication information does not have any encryption measures, the data code rate is low and the regularity is strong, and it is easy to be eavesdropped and imitation is easier

Second, the use of man-in-the-middle attacks can cause line trips, cause power grid operation accidents, and endanger power grid security

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