Green Energy and Networking. 5th EAI International Conference, GreeNets 2018, Guimarães, Portugal, November 21–23, 2018, Proceedings

Research Article

Improved Voltage Control of the Electric Vehicle Operating as UPS in Smart Homes

  • @INPROCEEDINGS{10.1007/978-3-030-12950-7_1,
        author={V\^{\i}tor Monteiro and Joao Catal\"{a}o and Tiago Sousa and J. Pinto and Marcello Mezaroba and Jo\"{a}o Afonso},
        title={Improved Voltage Control of the Electric Vehicle Operating as UPS in Smart Homes},
        proceedings={Green Energy and Networking. 5th EAI International Conference, GreeNets 2018, Guimar\"{a}es, Portugal, November 21--23, 2018, Proceedings},
        proceedings_a={GREENETS},
        year={2019},
        month={2},
        keywords={Electric vehicle Bidirectional converter Uninterruptible power supply Kalman filter Smart home},
        doi={10.1007/978-3-030-12950-7_1}
    }
    
  • Vítor Monteiro
    Joao Catalão
    Tiago Sousa
    J. Pinto
    Marcello Mezaroba
    João Afonso
    Year: 2019
    Improved Voltage Control of the Electric Vehicle Operating as UPS in Smart Homes
    GREENETS
    Springer
    DOI: 10.1007/978-3-030-12950-7_1
Vítor Monteiro1,*, Joao Catalão2, Tiago Sousa1, J. Pinto1, Marcello Mezaroba3, João Afonso1
  • 1: University of Minho
  • 2: INESC TEC and Faculty of Engineering of the University of Porto
  • 3: Santa Catarina State University
*Contact email: vmonteiro@dei.uminho.pt

Abstract

As a contribution for sustainability, electric vehicles (EVs) are seen as one of the most effective influences in the transport sector. As complement to the challenges that entails the EVs integration into the grid considering the bidirectional operation (grid-to-vehicle and vehicle-to-grid), there are new concepts associated with the EV operation integrating various benefits for smart homes. In this sense, this paper proposes an improved voltage control of the EV operating as uninterruptible power supply (UPS) in smart homes. With the EV plugged-in into the smart home, it can act as an off-line UPS protecting the electrical appliances from power grid outages. Throughout the paper, the foremost advantages of the proposed voltage control strategy are comprehensively emphasized, establishing a comparison with the classical approach. Aiming to offer a sinusoidal voltage for linear and nonlinear electrical appliances, a pulse-width modulation with a multi-loop control scheme is used. A Kalman filter is used for decreasing significantly the time of detecting power outages and, consequently, the transition for the UPS mode. The experimental validation was executed with a bidirectional charger containing a double stage power conversion (an ac-dc interfacing the grid-side and a dc-dc interfacing the batteries-side) and a digital stage. The computer simulations and the acquired experimental results validate the proposed strategy in different conditions of operation.