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Estimating the impacts of single phase electric vehicle charging and photovoltaic installations on an unbalanced 3-phase distribution grid
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Mechanics, Byggteknik.ORCID iD: 0000-0001-6292-0695
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Mechanics, Byggteknik.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Mechanics, Byggteknik.ORCID iD: 0000-0003-4887-9547
2019 (English)Conference paper, Published paper (Other academic)
Abstract [en]

The number of photovoltaic (PV) installations in the low voltage (LV) grid has increased globally in the last decade. Simultaneously, the sales of electric vehicles (EVs) have rapidly increased. In this paper, an investigation of the impacts of single phase charging (slow charging) of EVs along with single phase PV power generation on a residential electricity grid is provided. This paper also considers unbalanced loads in the electricity grid. Several scenarios were modeled, and each scenario represented a degree of severity of the unbalance in the grid. The results show that the tested grid could maintain the voltages within 0.905–1.103 per-unit (pu) when unbalanced and with PV generation and EV charging loads. The active power losses, however, increased by 42% as compared with the case without EVs. The unbalance of the customer loads results in a 0.03 pu decrease in the minimum voltage in the grid. In addition, the active power losses were higher by 12% compared with the balanced customer load case. In summary, future papers are encouraged to simulate the loads in their unbalanced form, and to try to balance the loads among the phases of the grid.

Place, publisher, year, edition, pages
Dublin, Ireland: Energynautics GmbH, 2019.
Keywords [en]
electric vehicles, photovoltaic, residential grid, unbalanced three-phase load
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering Infrastructure Engineering
Identifiers
URN: urn:nbn:se:uu:diva-395822OAI: oai:DiVA.org:uu-395822DiVA, id: diva2:1365380
Conference
9th Solar integration workshop, Dublin, October 14, 2019.
Available from: 2019-10-24 Created: 2019-10-24 Last updated: 2019-10-29Bibliographically approved

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Shepero, MahmoudRamadhani, UmarWidén, Joakim

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