Title :
Experience with DFR-based moisture estimation in transformers and impact of aging by-products
Author :
Hernandez, R.D. ; Lachman, M.F. ; Griffin, P.J. ; Lewand, L.
Author_Institution :
Doble Eng. Co., Watertown, MA, USA
Abstract :
In 2012, Doble initiated a series of Dielectric Frequency Response (DFR) research papers aimed at addressing issues influencing reliability of the DFR-based data analysis [1]. The subsequent 2013 paper presented nonlinear effects of the insulating liquid conductivity and its impact on the dielectric response. It also introduced a methodology for compensating the effects of low molecular weight carboxylic acids on the DFR-based moisture estimation [2]. The current paper presents a further discussion of this methodology along with a case study of DFR field measurements on a transformer.
Keywords :
ageing; frequency response; moisture; power system reliability; transformer insulation; DFR field measurement; DFR-based data analysis reliability; DFR-based moisture estimation; aging by-product impact; dielectric frequency response; insulating liquid conductivity nonlinear effect; molecular weight carboxylic acid; transformer; Dielectrics; Estimation; Laboratories; Minerals; Moisture; Power transformer insulation; Reactive power; carboxylic acids; dielectric response; moisture; transformer;
Conference_Titel :
Central America and Panama Convention (CONCAPAN XXXIV), 2014 IEEE
Conference_Location :
Panama City
DOI :
10.1109/CONCAPAN.2014.7000473
