CAJ | 학술논문

基于 IEC 61850的变电站自动化系统(substation automation system，SAS)是SAS的发展方向。变电站安全问题日益突出，对 SAS 开展安全风险评估十分必要。提出了基于功能分解的 SAS 安全风险评估方法，依据 IEC 61850建立基于功能分解的安全风险评估模型，对 SAS 系统和功能进行数学语言描述，将SAS安全风险划分为“系统风险”和“功能风险”。给出了功能失效概率计算方法，并引入逻辑连接价值、逻辑节点价值和功能价值概念以度量功能失效后果损失。建立了功能风险等级9级评定方法和基于层次分析法的系统风险综合方法。最后以T1-1型变电站SAS为例验证了方法的可行性和适用性。
기우 IEC 61850적변전참자동화계통(substation automation system，SAS)시SAS적발전방향。변전참안전문제일익돌출，대 SAS 개전안전풍험평고십분필요。제출료기우공능분해적 SAS 안전풍험평고방법，의거 IEC 61850건립기우공능분해적안전풍험평고모형，대 SAS 계통화공능진행수학어언묘술，장SAS안전풍험화분위“계통풍험”화“공능풍험”。급출료공능실효개솔계산방법，병인입라집련접개치、라집절점개치화공능개치개념이도량공능실효후과손실。건립료공능풍험등급9급평정방법화기우층차분석법적계통풍험종합방법。최후이T1-1형변전참SAS위례험증료방법적가행성화괄용성。
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 risk assessment for the SAS. This paper proposed a methodology for the security risk 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 risk of the SAS was divided into“system risk” and “function 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 risk assessment criteria and a system risk 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.