Evaluation Method of 500kV Transformer Bushing Insulation State Based on Active Power Loss

Abstract The bushing is one of the most important components power transformer, and it very to find internal defects bushings as soon possible, effectively accurately diagnose its insulation state information. In this paper, active loss 500kV transformer have been analyzed, evaluation method based on proposed. To verify feasibility method, abnormal was selected analyze state. result shows that can be used a powerful complement tarδ.