An approach for estimating winding deformation using frequency response analysis

• Published in: CEAT 2016 : 4th IET Clean Energy and Technology Conference : 14-15 November 2016, Kuala Lumpur, Malaysia
• Main Authors: M.F.M. Yousof, N.S.A. Mawardi, Nawawi, N A, N.A.M. Yusof, M.K.A. Uyup
• Format: Conference Proceeding
• Language: English
• Published: Stevenage The Institution of Engineering & Technology 14-11-2016
• Subjects: Condition monitoring; Damage; Deformation; Estimation; Frequency analysis; Frequency response; Transformers; Winding
• ISBN: 1785612387; 9781785612381
• DOI: 10.1049/cp.2016.1297

Monitoring the condition of power transformer is very important since it is a vital component in power system network. To evaluate a transformer's status, frequency response analysis (FRA) has been used due to its sensitivity to detect physical deformation of the winding. However in FRA, interpreting the measured result is quite difficult. Knowing the severity or percentage of the damage will tremendously help the engineers to estimate when is the suitable time to replace a new transformer if required. In this paper, a methodology is proposed for estimating the percentage of transformer winding damage. The method analyses winding's frequency response to generate another plot which is the percentage of change of magnitude plot. The plot shows that as the winding damage increases, the oscillation in the plot reduces. This relationship can be used as an interpretation scheme for approximating the severity of the damage.