Power quality issues into a Danish low-voltage grid with electric vehicles

Author

Marra, Francesco ; Jensen, Morten Møller ; Garcia-Valle, Rodrigo ; Traholt, Chresten ; Larsen, Esben

Author_Institution

Dept. of Electr. Eng., Tech. Univ. of Denmark, Lyngby, Denmark

fYear

2011

fDate

17-19 Oct. 2011

Firstpage

1

Lastpage

6

Abstract

An increased interest on electric vehicles (EVs) and plug-in hybrid electric vehicles (PHEVs) is dealing with their introduction into low voltage (LV) distribution grids. Lately, analysis on power quality issues has received attention when considering EVs as additional load. The charging of EVs is expected without a centralized coordination in the first years, therefore a study on voltage variations and loading of LV grids is needed to estimate the immediate impact by EVs. In this work, the modeling and simulation of a Danish residential LV grid is conducted considering the two scenarios of dumb charging and overnight charging. The effect of different shares of EVs on voltage variations and transformer loading is assessed and analyzed. Results have shown that if single-phase, 16 A charging is employed, the actual LV grid would withstand the contingency of up to 30-40% of EVs charging overnight.

Keywords

hybrid electric vehicles; power grids; power supply quality; power transformers; Danish low-voltage grid; Danish residential LV grid simulation; current 16 A; low voltage distribution grids; plug-in hybrid electric vehicles; power quality issue; transformer loading; Batteries; Load modeling; Loading; Power cables; Power quality; Vehicles; Voltage measurement; electric vehicles; low voltage grid; power quality; uncoordinated charging; voltage variations;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Power Quality and Utilisation (EPQU), 2011 11th International Conference on

Conference_Location

Lisbon

ISSN

2150-6647

Print_ISBN

978-1-4673-0379-8

Type

conf

DOI

10.1109/EPQU.2011.6128946

Filename

6128946