An Off-Board Multi-Functional Electric Vehicle Charging Station for Smart Homes: Analysis and Experimental Validation

Vitor Monteiro, Pedro Lima, Tiago J. C. Sousa, Julio S. Martins and Joao L. Afonso
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Vitor Monteiro: Department of Industrial Electronics, University of Minho;Campus de Azurem, 4800-058 Guimaraes, Portugal
Pedro Lima: Department of Industrial Electronics, University of Minho;Campus de Azurem, 4800-058 Guimaraes, Portugal
Tiago J. C. Sousa: Department of Industrial Electronics, University of Minho;Campus de Azurem, 4800-058 Guimaraes, Portugal
Julio S. Martins: Department of Industrial Electronics, University of Minho;Campus de Azurem, 4800-058 Guimaraes, Portugal
Joao L. Afonso: Department of Industrial Electronics, University of Minho;Campus de Azurem, 4800-058 Guimaraes, Portugal

Energies, 2020, vol. 13, issue 8, 1-23

Abstract: This paper presents the analysis and experimental validation of a single-phase off-board multi-functional electric vehicle (EV) charging station (MF-EVCS), which has a single ac interface and two dc interfaces. As innovative aspects, the proposed MF-EVCS handles the interface of the ac power grid, the dc interface of a renewable energy source (RES), as well as the dc interface of an EV to perform dc charging or discharging of the batteries (in off-board grid-to-vehicle (G2V) or vehicle-to-grid (V2G) modes). Considering the power grid, the individual operation modes of the RES and the EV interfaces can be considered. Moreover, a combination of these modes is also possible. Besides, the MF-EVCS has as key innovative aspect the possibility of operating as an active power filter (APF), supporting the operation with reactive power and/or selected current harmonics. This possibility can be associated with any of the previous mentioned modes. These new features are framed in two distinct scenarios: in a smart home, where the ac-side current can be determined as a function of the other electrical appliances; in a smart grid, where the ac-side current can be determined as a requisite of the power grid. The proposed power theory, as well as the current control strategies for both ac-side and dc-side of the MF-EVCS, are presented in the paper for all the possible operation scenarios. A laboratory prototype was developed to validate the proposed MF-EVCS and the experimental results confirm its suitability for smart homes.

Keywords: electric vehicles; smart grid; smart home; off-board charging station; renewable energy source; power quality; power electronics (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
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