This paper reports current total harmonic distortion (THD) levels from a variety of production electric vehicles, using both 13A and 32A charging modes where available, at various initial states of charge. THD has been found to vary between similarly rated on-board chargers, although typically remaining within regulations. Measured current THD ranged from 2-4% for one type of onboard charger, to up to 12% for another. The individual current harmonics were also found to be within regulations, although 32A chargers, if operated in 13A mode, produced harmonics in excess of the regulations for 13A chargers. The impacts of the harmonic distortion on low voltage networks were simulated using a sample low voltage network from the UK, and were found to be unlikely to create a significant voltage harmonic distortion at the substation. Some vehicle types could have a charging electric vehicle at every house without creating excessive voltage harmonic distortion, and the worst performing vehicle type could still be charged at up to 87% of the houses simultaneously. However, UK regulations for 32A vehicle chargers were found to be inadequate as very high levels of distortion could be created by a charger which emitted the maximum permitted current harmonics.
Impacts of harmonie distortion from charging electric vehicles on low voltage networks
EVS, Electric Vehicle Symposium, 26 ; 757-762
2012
6 Seiten, 4 Bilder, 4 Tabellen, 9 Quellen
Conference paper
English
Online Contents | 2000
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