电网故障诊断中基于粗糙集理论的获取方法

介绍了电网故障诊断专家系统中基于粗糙集理论的知识获取的一种新方法 ,利用分层诊断中由断路器变位信息诊断出故障区域 ,指导决策表中条件属性的选择 ,最大限度剔除多余的条件属性 ,通过对决策表进行属性约简和值约简 ,得出故障诊断需要的诊断知识即诊断规则。说明该方法既能有效获取知识 ,又能为诊断提供一定的容错性

Method of power net breakdown diagnosis based on theory of coarse set

This paper proposes a new method of Rough-Set-Based knowledge acquisition in the power system fault diagnostic expert system.The method uses the fault section which has been estimated by the tripped breakers in the hierarchical fault diagnosis system to decide which conditional attributes in the decision table will be selected to remove the redundant conditional attributes. The diagnostic rules are extracted by attribute-reducting and value-reducting the decision table. It shows that the method presented in the paper has not only effective knowledge acquisition, but also excellent fault-tolerance capability.