Condition Evaluation Of Power Transformer Based On Improved Grey-Target

As the ultimate element in the electric power system, the safe of operating of transformer is correlative with the safety of the power system, so the condition assessment is of great importance and studied based on Grey target Theory in this thesis.Firstly, we use the dissolved gas as the assessment criteria of power transformer, and set up the standard pattern sequence. Then, entropy weight theory is introduced into evaluation to improve the formula for solving the approaching degree. Finally, a method for evaluating the health condition of power transformer is set up based on the grey target theory. It is under this, the method is validated by examples of health condition evaluation for Cangzhou power company's transformer.