改进功能分解的二次系统风险评估方法  

An Improved Method of Secondary System Risk Assessment Based on Functional Decomposition

作　　者：曹志昆 章杜锡 董树锋[1] 郭创新[1] 

机构地区：[1]浙江大学电气工程学院,浙江省杭州市310027 [2]国网宁波供电公司,浙江省宁波市315016

出　　处：《电网技术》2016年第4期1265-1270,共6页Power System Technology

基　　金：国家自然科学基金资助项目(51207136);教育部高等学校博士学科点专项科研基金资助项目(20120101120157)~~

摘　　要：在基于功能分解的二次系统风险评估中,对于功能失效概率的评估是整个评估过程中关键的一环。针对目前方法中需要建立可靠性框图、主观性强等不足,提出了基于功能图的功能失效概率评估模型,并将基于可靠性框图的评估方法进行推广,使之可以直接根据功能图计算功能的失效概率。该方法首先将叶功能分解成只含逻辑节点和逻辑连接的有向连通图,接着根据邻接矩阵求得功能状态关于逻辑节点和逻辑连接状态的表达式,并分别给出计算功能失效概率的精确方法和近似方法。最后,使用测量数据采集功能的算例说明所提评估方法的计算过程。Probability assessment of functional failure is key procedure in secondary system risk assessment based on functional decomposition. This paper proposed models and algorithms for probability assessment of functional failure based on functional graph of information pieces. In this approach, leaf functions were first decomposed to functional graph, consisting of logical nodes and logical connections. Reduction of connection matrix was then performed to yield logical expression of function state in terms of states of logical nodes and connections. Two methods of evaluating probability of functional failure were presented, i.e. accurate method and approximate method. Assessment procedure was illustrated with a case study on data acquisition function.

关 键 词：风险评估 二次系统 功能分解 

分 类 号：TM721[电气工程—电力系统及自动化]