Estimating the acceleration of transformer aging due to electric vehicle charging

Author

Hilshey, Alexander D. ; Hines, Paul D H ; Dowds, Jonathan R.

Author_Institution

Sch. of Eng., Univ. of Vermont, Burlington, VT, USA

fYear

2011

Firstpage

1

Lastpage

9

Abstract

This paper describes a method for estimating the additional aging in medium/low voltage distribution transformers caused by increasing demand from electric vehicle charging. The proposed method combines detailed travel demand data from the National Household Transportation Survey with a one-year model of transformer hottest spot temperature, based on on IEEE C57.91-1995 Annex G. To illustrate the the model outputs, we present results for 15kVA and 25kVA overhead distribution transformers using ambient temperatures from Burlington, VT and Los Angeles, CA. Our results illustrate the importance of ambient temperatures to impact of PEVs on transformer aging.

Keywords

battery chargers; battery powered vehicles; hybrid electric vehicles; power transformers; PEV; acceleration; ambient temperatures; electric vehicle charging; overhead distribution transformers; transformer aging; Aging; Load modeling; Oil insulation; Power transformer insulation; Temperature distribution; Windings; Plug-in hybrid electric vehicles; transformer aging;

fLanguage

English

Publisher

ieee

Conference_Titel

Power and Energy Society General Meeting, 2011 IEEE

Conference_Location

San Diego, CA

ISSN

1944-9925

Print_ISBN

978-1-4577-1000-1

Electronic_ISBN

1944-9925

Type

conf

DOI

10.1109/PES.2011.6039848

Filename

6039848