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Study on Fault Diagnosis of Insulation of Oil-immersed Transformer Based on Grey Cluster Theory

Li Jian Sun Caixin Chen Weigen Chen Guoqing Cui Xuemei (Chongqing University 400044 China)  
Dissolved gas analysis(DGA)is an important method to judge the insulation condition and find out fault inside transformer.As transformer can be considered as a complex grey system,this paper analyses transformer insulation fault with grey system theory.Furthermore,this paper brings forward a gray cluster model and the relevant method for insulation fault diagnosis.According to analysis to some fault examples,it is testified that the proposed model can be used for analyzing fault pattern and locating the fault position.Meanwhile,analysis results show the method in this paper is valid and possesses good prospect of wide application.
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