Analysis and Comparison of Voltage Dependent Charging Strategies for Single-Phase Electric Vehicles in an Unbalanced Danish Distribution Grid

Jorge Nájera Álvarez; Katarina Knezovic; Mattia Marinelli

doi:10.1109/UPEC.2016.8114062

Analysis and Comparison of Voltage Dependent Charging Strategies for Single-Phase Electric Vehicles in an Unbalanced Danish Distribution Grid

Jorge Nájera Álvarez, Katarina Knezovic, Mattia Marinelli

Technical University of Denmark

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

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Abstract

This paper studies four voltage dependent solutions for modulating the charging of multiple Electric Vehicles (EVs) in a real Danish network. Uncontrolled EV charging, especially in grid with high EV penetration, can result in overloaded lines and transformers, low-voltages and other performance degradations which lead to poor quality of supply. Therefore, a decentralized control for modulating the EVs’ charging current is developed, which sets the EV reference current based on the phase-to-neutral voltage at the EV connection node. Due to the controller’s decentralised feature, EVs plugged-in on phases with lower voltages are constrained during the charging period. In order to solve instability issues which may occur due to lack of communication between the controllers, several improvements are applied to the aforementioned droop control. Simulation results demonstrate the performance of the voltage dependent
controls for a real Danish distribution grid.

Original language	English
Title of host publication	Proceedings of the 51st International Universities Power Engineering Conference
Number of pages	6
Publisher	IEEE
Publication date	2016
DOIs	https://doi.org/10.1109/UPEC.2016.8114062
Publication status	Published - 2016
Event	51st International Universities Power Engineering Conference - Coimbra, Portugal Duration: 6 Sept 2016 → 9 Sept 2016

Conference

Conference	51st International Universities Power Engineering Conference
Country/Territory	Portugal
City	Coimbra
Period	06/09/2016 → 09/09/2016

Keywords

Distribution network
Droop control
Electric vehicles
Voltage control

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10.1109/UPEC.2016.8114062

UPEC 2016 EV single phase voltage control full paperAccepted author manuscript, 1.35 MB

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title = "Analysis and Comparison of Voltage Dependent Charging Strategies for Single-Phase Electric Vehicles in an Unbalanced Danish Distribution Grid",

abstract = "This paper studies four voltage dependent solutions for modulating the charging of multiple Electric Vehicles (EVs) in a real Danish network. Uncontrolled EV charging, especially in grid with high EV penetration, can result in overloaded lines and transformers, low-voltages and other performance degradations which lead to poor quality of supply. Therefore, a decentralized control for modulating the EVs{\textquoteright} charging current is developed, which sets the EV reference current based on the phase-to-neutral voltage at the EV connection node. Due to the controller{\textquoteright}s decentralised feature, EVs plugged-in on phases with lower voltages are constrained during the charging period. In order to solve instability issues which may occur due to lack of communication between the controllers, several improvements are applied to the aforementioned droop control. Simulation results demonstrate the performance of the voltage dependentcontrols for a real Danish distribution grid.",

keywords = "Distribution network, Droop control, Electric vehicles, Voltage control",

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booktitle = "Proceedings of the 51st International Universities Power Engineering Conference",

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Álvarez, JN, Knezovic, K & Marinelli, M 2016, Analysis and Comparison of Voltage Dependent Charging Strategies for Single-Phase Electric Vehicles in an Unbalanced Danish Distribution Grid. in Proceedings of the 51st International Universities Power Engineering Conference. IEEE, 51st International Universities Power Engineering Conference, Coimbra, Portugal, 06/09/2016. https://doi.org/10.1109/UPEC.2016.8114062

Analysis and Comparison of Voltage Dependent Charging Strategies for Single-Phase Electric Vehicles in an Unbalanced Danish Distribution Grid. / Álvarez, Jorge Nájera; Knezovic, Katarina; Marinelli, Mattia.
Proceedings of the 51st International Universities Power Engineering Conference. IEEE, 2016.

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

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AB - This paper studies four voltage dependent solutions for modulating the charging of multiple Electric Vehicles (EVs) in a real Danish network. Uncontrolled EV charging, especially in grid with high EV penetration, can result in overloaded lines and transformers, low-voltages and other performance degradations which lead to poor quality of supply. Therefore, a decentralized control for modulating the EVs’ charging current is developed, which sets the EV reference current based on the phase-to-neutral voltage at the EV connection node. Due to the controller’s decentralised feature, EVs plugged-in on phases with lower voltages are constrained during the charging period. In order to solve instability issues which may occur due to lack of communication between the controllers, several improvements are applied to the aforementioned droop control. Simulation results demonstrate the performance of the voltage dependentcontrols for a real Danish distribution grid.

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Analysis and Comparison of Voltage Dependent Charging Strategies for Single-Phase Electric Vehicles in an Unbalanced Danish Distribution Grid

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