A photovoltaic-fed dc-bus islanded electric vehicles charging system based on a hybrid control scheme

Han Huang; Senthooran Balasubramaniam; Grazia Todeschini; Surya Santoso

doi:10.3390/electronics10101142

A photovoltaic-fed dc-bus islanded electric vehicles charging system based on a hybrid control scheme

Han Huang, Senthooran Balasubramaniam, Grazia Todeschini, Surya Santoso

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

91 Downloads (Pure)

Abstract

Electric vehicle (EV) charging stations fed by photovoltaic (PV) panels allow integration of various low-carbon technologies, and are gaining increasing attention as a mean to locally manage power generation and demand. This paper presents novel control schemes to improve coordination of an islanded PV-fed DC bus EV charging system during various disturbances, including rapid changes of irradiance, EV connection and disconnection, or energy storage unit (ESU) charging and discharging. A new hybrid control scheme combining the advantages of both master–slave control and droop control is proposed for a charging station supplying 20 EVs for a total power of 890 kW. In addition, a three-level (3L) boost converter with capacitor voltage balance control is designed for PV generation, with the aim to provide high voltage gain while employing a small inductor. The control techniques are implemented in a simulation environment. Various case studies are presented and analysed, confirming the effectiveness and stability of the control strategies proposed for the islanded charging system. For all tested conditions, the operating voltage is maintained within 5% of the rated value.

Original language	English
Article number	1142
Journal	Electronics (Switzerland)
Volume	10
Issue number	10
DOIs	https://doi.org/10.3390/electronics10101142
Publication status	Published - 11 May 2021

Bibliographical note

Funding Information:
Acknowledgments: The authors would like to acknowledge funding by the European Regional Development Fund, through the Welsh Government, for the 2nd Solar Photovoltaic Academic Research Consortium (SPARC II) which supported this research.

Publisher Copyright:
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.

Keywords

Charging stations
Droop control
Electric vehicles
Islanded microgrid
Photovoltaic systems

ASJC Scopus subject areas

Control and Systems Engineering
Signal Processing
Hardware and Architecture
Computer Networks and Communications
Electrical and Electronic Engineering

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.3390/electronics10101142Licence: CC BY

Huang_Photovoltaic-fed dc-bus islanded electric vehiclesFinal published version, 2.38 MBLicence: CC BY

Cite this

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abstract = "Electric vehicle (EV) charging stations fed by photovoltaic (PV) panels allow integration of various low-carbon technologies, and are gaining increasing attention as a mean to locally manage power generation and demand. This paper presents novel control schemes to improve coordination of an islanded PV-fed DC bus EV charging system during various disturbances, including rapid changes of irradiance, EV connection and disconnection, or energy storage unit (ESU) charging and discharging. A new hybrid control scheme combining the advantages of both master–slave control and droop control is proposed for a charging station supplying 20 EVs for a total power of 890 kW. In addition, a three-level (3L) boost converter with capacitor voltage balance control is designed for PV generation, with the aim to provide high voltage gain while employing a small inductor. The control techniques are implemented in a simulation environment. Various case studies are presented and analysed, confirming the effectiveness and stability of the control strategies proposed for the islanded charging system. For all tested conditions, the operating voltage is maintained within 5% of the rated value.",

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N1 - Funding Information: Acknowledgments: The authors would like to acknowledge funding by the European Regional Development Fund, through the Welsh Government, for the 2nd Solar Photovoltaic Academic Research Consortium (SPARC II) which supported this research. Publisher Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

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AB - Electric vehicle (EV) charging stations fed by photovoltaic (PV) panels allow integration of various low-carbon technologies, and are gaining increasing attention as a mean to locally manage power generation and demand. This paper presents novel control schemes to improve coordination of an islanded PV-fed DC bus EV charging system during various disturbances, including rapid changes of irradiance, EV connection and disconnection, or energy storage unit (ESU) charging and discharging. A new hybrid control scheme combining the advantages of both master–slave control and droop control is proposed for a charging station supplying 20 EVs for a total power of 890 kW. In addition, a three-level (3L) boost converter with capacitor voltage balance control is designed for PV generation, with the aim to provide high voltage gain while employing a small inductor. The control techniques are implemented in a simulation environment. Various case studies are presented and analysed, confirming the effectiveness and stability of the control strategies proposed for the islanded charging system. For all tested conditions, the operating voltage is maintained within 5% of the rated value.

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A photovoltaic-fed dc-bus islanded electric vehicles charging system based on a hybrid control scheme

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

UN SDGs

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