A smart grid information transmission safety protection device and safety protection method

Abstract

The invention discloses a smart grid information transmission safety protection device and a safety protection method, which relate to the technical field of smart grid information transmission safety. The device comprises a certificate server, an encryption and decryption module, a compliance check module and an exception handling module, wherein the encryption and decryption module is wholly serially connected between a station level and a bay level for carrying out encryption signature and signature verification decryption functions on original transparently-transmitted data; the compliance check module grabs a plaintext data packet in an offline or online mode and submits the plaintext data packet to the detection module for compliance check, and as for a compliance message, an analysis result is stored to a log database in a log format; and exception information is independently stored in an exception database through the exception handling module, and an administrator is notified. In the case of permissible delay in the smart grid, the encryption and decryption module together protects the internal information of the smart grid, behaviors that the internal data are tampered and destructed in the case of transmission are resisted, and the safety of the grid is further improved.

Description

technical field [0001] The invention relates to the technical field of smart grid information transmission security, in particular to a smart grid information transmission security protection device and a security protection method. Background technique [0002] With the rapid development and wide application of smart substations, the security of smart substations has attracted more and more attention, but the security protection system of smart substations is not yet perfect. Prior to 2011, the number of publicly disclosed ICS-related vulnerabilities was fairly small, but 2011 saw a rapid increase. [0003] After the Stuxnet worm incident in 2010, people continued to pay attention to the security issues of industrial control systems, and industrial control system manufacturers analyzed and solved the security issues left over from history. As all parties pay more and more attention to the security of industrial control systems, the number of related disclosed vulnerabiliti...

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Problems solved by technology

[0004] Most of the existing security protection measures are based on firewall technology, security rule base and feature base to detect communication data, but this detection is only at the entrance of the substation system, not deployed inside the substation, and cannot guarantee the security of data transmission inside the substation

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