Application of Rough Set in Fault Diagnosis of Power Transformer

Power transformer is a complex system.It is difficult to gain complete experiment data in actual fault diagnosis.To solve the problem,the paper proposed a new method of fault diagnosis of power transformer based on rough set.The implementing steps of the method are as follows: analyzing collected history fault data of power transformer to determine condition attribute set and decision attribute set;deducting condition attribute set to remove redundant information and extract key information,so as to gain relative rule set;making fault diagnosis for power transformer by use of the rule set.The case analysis proved validity and effectiveness of the method.