Mathematical Problems in Engineering / 2020 / Article / Tab 2

Research Article

Integrated Transformer Health Estimation Methodology Based on Markov Chains and Evidential Reasoning

Table 2

Weighting factors of different inspection methods.

ET componentInspection methodWeighting factor ()

Magnetic coreOpen-circuit test/SFRA5
Geometry end electric contacts of windingsResistance testing5
Leakage inductance test/SFRA5
InsulationInsulation resistivity/tgδ and capacitance test5
PDC/RVM/FDS/water content in oil4
Furan derivative analysis3
Bushingstgδ and capacitance4
On-line tap changerStatic/dynamic resistance testing5
DGA analysis for the active partDissolved gas analysis (DGA)4
Transformer oilPhysical and chemical oil characteristics5
Content of water in oil4
Transformer tank and auxiliary equipmentTesting of cooling system and auxiliary equipment2
Visual inspection/leakage control2
Work historyLoading and operation history3

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