Time Domain Diffusion-Driven Dielectric Response Model for Investigation of Moisture Dynamics in Transformers Insulation

No Thumbnail Available
File version
Author(s)
Cui, Yi
Ma, Hui
Saha, Tapan
Ekanayake, Chandima
Martin, Daniel
Griffith University Author(s)
Primary Supervisor
Other Supervisors
Editor(s)
Date
2015
Size
File type(s)
Location

Denver, CO, USA

License
Abstract

In this paper a time domain diffusion-driven model is presented to investigate the correlation between the distribution of moisture during thermal transients, and the resultant polarization and depolarization current (PDC) measurement, for transformer cellulosic insulation. The oil-impregnated cellulosic insulation is modeled as being multiple layers of paper, with each layer having a different permittivity and conductivity. The non-uniform distribution of moisture occurring during diffusion was taken into consideration. The correlation between moisture concentration and conductivity of the cellulose insulation was investigated. Then, the dielectric response of the cellulose was computed and the dielectric relaxation behavior affected by the moisture dynamics was modelled. The moisture diffusion experiments were conducted on a test transformer to verify the proposed model.

Journal Title
Conference Title

2015 IEEE Power and Energy Society General Meeting

Book Title
Edition
Volume
Issue
Thesis Type
Degree Program
School
Publisher link
Patent number
Funder(s)
Grant identifier(s)
Rights Statement
Rights Statement
Item Access Status
Note
Access the data
Related item(s)
Subject

Electrical and Electronic Engineering not elsewhere classified

Persistent link to this record
Citation