Condition assessment of the health index for power transformer

This paper is performed in order to estimate the overall condition of transformer, which is considered by 21 test methods : Dissolved Gas Analysis, Load History, Power Factor, Thermo Scan, Oil Quality, Furan, General Condition, Bushing, Surge Arrester, Conservator Tank, Main Tank, Hot Line Oil Filter, Radiator and Cooling System, Transformer Control Cabinet, Neutral Ground Reactor (NGR), Protection Equipment, Regulating PT, OLTC Compartment, OLTC Control Cabinet, DGA of OLTC, and OLTC Oil Quality. The condition assessment for transformer is performed by the analysis of each method, indicated by scoring and weighting factor of each tests. Furthermore, the overall condition and the result from 21 test methods indicated by this analysis result in the ability to effectively plan the maintenance of power transformer.