敏感设备电压暂降失效后果状态格序化评估  

Lattice Order Decision-making Based Evaluation Method of Sensitive Equipment Failure Caused by Voltage Sag

作　　者：汪颖[1] 杨达[1] 刘旭娜[1] 陈礼频[1] 肖先勇[1] 

机构地区：[1]四川大学电气信息学院,四川成都610065

出　　处：《四川大学学报（工程科学版）》2013年第3期120-126,共7页Journal of Sichuan University (Engineering Science Edition)

基　　金：国家自然科学基金资助项目(50877049);国家"863"计划子课题资助项目(2012AA050216);四川省科技支撑计划资助项目(2013GZ0062)

摘　　要：为评估敏感设备经历电压暂降后的最可能故障状态,提出一种格序化方法。从设备电压暂降多值映射后果状态的物理属性出发,提出多值映射后果状态刻画方法,用各后果状态的上、下概率构成的区间数刻画设备状态,各可能状态构成格。引入可能度概念,用可能度矩阵对不满足连通性的后果状态进行比较,确定最可能状态。仿真结果与实测结果表明,提出的方法不仅能准确评估最可能结果,还能给出其它可能结果的排序,对样本的依赖性小,工程应用价值明显。To evaluate the most possible failure state of sensitive equipment when they encounter voltage sags, a lattice order based method was studied. Starting with the physical nature of equipment muhivalued mapping outcome due to voltage sag, a multivalued mapping based outcome state describing method was proposed. Interval numbers which possess the characteristics of lattice order with the upper and lower probabilities of each outcome state as two endpoints were used to describe equipment state,and then the outcome states of decisionmaking problem could be lattice ordered. The possibility degree concept was introduced, and the possibility degree ma trices were used to compare outcome states which don＇ t satisfy eonnectedness axioms and the most possible outcome state could be ob tained. Comparing the simulation result with actual testing result showed that the proposed method can objectively reflect equipment fail ure state and quantitatively determine the most possible state. The method is accurate, lesssampledependent and be of great engineer ing application significance.

关 键 词：电压暂降 设备失效 多值映射 格序化 可能度矩阵 样本依赖性 

分 类 号：TM71[电气工程—电力系统及自动化]