Unified Grey Relational Analysis on Transformer DGA Fault Diagnosis

ABSTRACT

Power transformer is one of the most important equipments in the electric system. Dissolved Gases Analysis is an important method in the diagnosis of internal fault of transformers. Because the signs and types of fault have complicated nonlinear relations, the traditional methods cannot exactly meet the requirements of engineer application. This paper proposes synthesis of relational grey incidence to analyze the comparability and the proximity of the sequence which can effectively diagnose the type of transformer faults.

Keywords:

Dissolved gases of power transformer, Unified relational grey analysis, DGA technique, Grey relational analysis.