State Assessment Study on Transformer Bushing Based on Cloud Gravity Center Assessment Method

The transformer bushing has many assessment parameters,such as qualitative parameters and quantitative parameters.In order to achieve a comprehensive assessment of the transfoimer bushing running state,the qualitative parameters and quantitative parameters should be combined,while Cloud Gravity Center Assessment Method could be able complete it.Therefore this method is introduced to complete the state assessment of transformer bushing.Firstly,divide the operating state of transformer bushing into four levels.Secondly,establish the cloud model of each index respectively.Thirdly,introduce the weighting degree of deviation to judge the deviation degree of transformer bushing from the normal state at certain moment.Lastly,give the state assessment results as per remark set.The reliability of the method is proved.