EPE Association: EPE 2025 - LS4b: Smart Charging, V2G, V2H, Charging Infrastructure and Grid Integration for Electromobility

EPE 2025 - LS4b: Smart Charging, V2G, V2H, Charging Infrastructure and Grid Integration for Electromobility
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2025 - Conference > EPE 2025 - Topic 03: Energy Storage Systems > EPE 2025 - LS4b: Smart Charging, V2G, V2H, Charging Infrastructure and Grid Integration for Electromobility

   [return to parent folder]

   A framework for smart charging strategies to further the adoption of electric buses in cities
By Yacine SEHIMI, Berk CELIK, Fabrice LOCMENT, Manuela SECHILARIU [View]
[Download]

Abstract: The increasing deployment of electric buses in cities can create opportunities for bus operators toprovide flexibility to the electrical grid and to reduce their operational costs. However, charging sessions must be properly monitored to maximize externalities while ensuring energy requirements of the fleet for their trips. This paper proposes a framework for analyzing the relevant charging strategies for a fleet of electric buses. After reviewing possible charging strategies in cooperation with grid ecosystem, a framework of interactions between actors is proposed. Modeling methods enabling to implement several charging strategies in a mathematical model are finally presented.

   Control of a Modular Multiport Solid State Transformer for Flexible High Power Charging Infrastructure
By Nikolas MENGER, Tobias MERZ, Hannah GRAUTE, Rüdiger SCHWENDEMANN, Marc HILLER [View]
[Download]

Abstract: This paper presents a control strategy for a Multiport Solid-State Transformer designed to connect multiple EV charging stations to the medium-voltage AC grid. The transformer employs a Cascaded H-Bridge converter composed of identical switching cells, each incorporating a Dual Active Bridge to provide galvanic isolation between the AC grid and the charging ports. Steady-state modelling of the multilevel converter is used to identify the permissible power imbalance between charging ports, ensuring stable operation. The proposed real-time control method facilitates independent output power control for each port while maintaining effective cell voltage balancing across the converter. Furthermore, dynamic switch matrix reconfiguration enhance the converter's operational range. The control strategy is validated through simulations and experimental measurements, demonstrating improved flexibility and performance for scalable EV charging infrastructure.

   Optimal techno-economic and environmental design of a renewable energy based charging station including second life batteries
By Evelise ANTUNES, Bruno SARENI, Xavier ROBOAM [View]
[Download]

Abstract: Photovoltaic panels combined with second life batteries (SLBs) represent an interesting solution for avoiding the reinforcement of electricity grids when setting up electric vehicle charging stations. This paper presents an integrated design approach aiming at minimizing the Net Present Cost (NPC) and the Global Warming Potential (GWP) of such charging stations, while performing an optimal dispatch. The case study compares the co-optimization of charging stations installed at a school bus depot with first life stationary batteries (FLBs) or with SLBs. The results showed that the addition of PV panels and stationary batteries increases the income of such charging stations and reduces the load shedding, compared with grid only systems. For the case with FLBs, there is a low or null presence of batteries in the optimal design solutions, due to the high installation cost and production emissions. However, the low cost and emissions of SLBs leads to optimal configurations with a high presence of batteries, increasing even more the charging station's incomes and the satisfaction of the EVs' charging needs.

EPE 2025 - LS4b: Smart Charging, V2G, V2H, Charging Infrastructure and Grid Integration for Electromobility
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2025 - Conference > EPE 2025 - Topic 03: Energy Storage Systems > EPE 2025 - LS4b: Smart Charging, V2G, V2H, Charging Infrastructure and Grid Integration for Electromobility
	[return to parent folder]

	A framework for smart charging strategies to further the adoption of electric buses in cities By Yacine SEHIMI, Berk CELIK, Fabrice LOCMENT, Manuela SECHILARIU	[View] [Download]
Abstract: The increasing deployment of electric buses in cities can create opportunities for bus operators toprovide flexibility to the electrical grid and to reduce their operational costs. However, charging sessions must be properly monitored to maximize externalities while ensuring energy requirements of the fleet for their trips. This paper proposes a framework for analyzing the relevant charging strategies for a fleet of electric buses. After reviewing possible charging strategies in cooperation with grid ecosystem, a framework of interactions between actors is proposed. Modeling methods enabling to implement several charging strategies in a mathematical model are finally presented.

	Control of a Modular Multiport Solid State Transformer for Flexible High Power Charging Infrastructure By Nikolas MENGER, Tobias MERZ, Hannah GRAUTE, Rüdiger SCHWENDEMANN, Marc HILLER	[View] [Download]
Abstract: This paper presents a control strategy for a Multiport Solid-State Transformer designed to connect multiple EV charging stations to the medium-voltage AC grid. The transformer employs a Cascaded H-Bridge converter composed of identical switching cells, each incorporating a Dual Active Bridge to provide galvanic isolation between the AC grid and the charging ports. Steady-state modelling of the multilevel converter is used to identify the permissible power imbalance between charging ports, ensuring stable operation. The proposed real-time control method facilitates independent output power control for each port while maintaining effective cell voltage balancing across the converter. Furthermore, dynamic switch matrix reconfiguration enhance the converter's operational range. The control strategy is validated through simulations and experimental measurements, demonstrating improved flexibility and performance for scalable EV charging infrastructure.

	Optimal techno-economic and environmental design of a renewable energy based charging station including second life batteries By Evelise ANTUNES, Bruno SARENI, Xavier ROBOAM	[View] [Download]
Abstract: Photovoltaic panels combined with second life batteries (SLBs) represent an interesting solution for avoiding the reinforcement of electricity grids when setting up electric vehicle charging stations. This paper presents an integrated design approach aiming at minimizing the Net Present Cost (NPC) and the Global Warming Potential (GWP) of such charging stations, while performing an optimal dispatch. The case study compares the co-optimization of charging stations installed at a school bus depot with first life stationary batteries (FLBs) or with SLBs. The results showed that the addition of PV panels and stationary batteries increases the income of such charging stations and reduces the load shedding, compared with grid only systems. For the case with FLBs, there is a low or null presence of batteries in the optimal design solutions, due to the high installation cost and production emissions. However, the low cost and emissions of SLBs leads to optimal configurations with a high presence of batteries, increasing even more the charging station's incomes and the satisfaction of the EVs' charging needs.