Title :
Applications of Operational Modal Analysis to a Single-Phase Distribution Transformer
Author :
Wang, Y. ; Pan, J.
Author_Institution :
Sch. of Mech. & Chem. Eng., Univ. of Western Australia, Perth, WA, Australia
Abstract :
Previous studies have shown that a transformer´s modal characteristics can be identified by its internal electromagnetic excitations and are related to structural damage. These may be useful for diagnosing the causes of failure modes in power transformers during normal operation. Operational modal analysis (OMA) appears to be a suitable tool for this purpose. In this letter, the feasibility of OMA in identifying transformer modal parameters is discussed with a special focus on the mechanisms of natural excitation. OMA is also applied to a 10-kVA transformer with and without artificially designed structural damage. Good correlation is obtained between the results of OMA and those of experimental modal analysis.
Keywords :
distribution networks; modal analysis; power transformers; OMA; apparent power 10 kVA; experimental modal analysis; internal electromagnetic excitations; operational modal analysis; power transformers; single-phase distribution transformer; transformer modal characteristics; transformer modal parameters; Modal analysis; Oil insulation; Power transformer insulation; Resonant frequency; Steady-state; Vibrations; Condition monitoring; modal parameter; operational modal analysis; transformer vibration;
Journal_Title :
Power Delivery, IEEE Transactions on
DOI :
10.1109/TPWRD.2015.2412696
