Security Risk Assessment of the IEC61850-based Substation Automation System
Guo Chuangxi · Proceedings of the CSEE · 2014
Substation automation system(SAS) based on IEC61850 is the development direction of SAS. The security issues of the SAS have become increasingly prominent, so it is meaningful to carry out security assessment for the SAS. This paper proposed a methodology for the security assessment of the SAS. The function-based model(FBM) was proposed according to IEC 61850, by which the SAS could be decomposed into functions and described in mathematical language, and the security of the SAS was divided into risk and risk. Secondly, a method for calculating the function failure probability was presented. And concepts, such as logical connection value, logical node value and function value, were defined to measure the loss of function failure. A 9-level assessment criteria and a system integration method based on analytic hierarchy process were established. Taking T1-1 substation SAS system as an example, the feasibility and applicability of the proposed method was verified.