EPE Association: EPE 2022 - DS2j: Energy Storage Systems for Renewable Energy including Power-to-Gas

EPE 2022 - DS2j: Energy Storage Systems for Renewable Energy including Power-to-Gas
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2022 ECCE Europe - Conference > EPE 2022 - Topic 06: Grids, Smart Grids, AC & DC > EPE 2022 - DS2j: Energy Storage Systems for Renewable Energy including Power-to-Gas

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   AC Battery: Modular Layout with Cell-level Degradation Control
By Claudio BURGOS [View]
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Abstract: This paper proposes a three-phase AC battery based on the modular multilevel converter (M2C). TheAC battery concept allows plug-and-play combinatorial integration of diverse battery cells with different characteristics such as nominal voltage, state of charge (SoC), and degradation levels. The resulting modular and reconfigurable battery pack can cost-effectively cover various applications, from electrified vehicles to stationary storage. To this end, in each sub-module (SM) of the M2C, battery cells (or battery modules composed of one or more battery cells) are connected to a single capacitor, thus enabling a cell-to-cell battery integration and control. In this scenario, the traditional battery management system (BMS) can be replaced by control schemes at the converter level, aiming to equalise critical parameters associated with battery cells (or battery modules). In this context, the degradation level of battery cells integrated by the proposed AC battery is a critical parameter to be considered. Indeed, it is likely that the integrated battery cells by the AC battery have different degradation levels. Therefore, methods for managing their degradation state are required to equalise the lifespan of battery cells within the AC battery. Based on that, this paper proposes a consensus-based distributed control scheme to manage the degradation process of battery cells (or battery modules composed of one or more battery cells) within the AC battery. Simulation results corroborate the effectiveness of the proposal.

   An Electrically Driven Gas Compressor for Hydrogen Refueling Stations with Active Power Smoothing
By Alfred RUFER [View]
[Download]

Abstract: A new electrically driven gas booster is described as an alternative to the classical air-driven gasboosters known for their poor energetic efficiency. These boosters are used in hydrogen refuelingstations where the global energy account is of significancy. The proposed system uses a commoncrankshaft and two connecting rods to transform the rotational motion of the motor to the lineardisplacement of the original compressor pistons. The strongly fluctuating power of the compressor issmoothed by an active capacitive auxiliary storage device connected to the DC circuit of the powerconverter that feeds the electric motor.The paper describes the typical behaviour of the compressor and of the coupling mechanism from thepoint of view of the needed forces, torques and power. The design of the auxiliary storage capacitor isgiven and the very specific waveforms are represented

   Sizing of Hybrid Energy Storage System for Residential PV Applications
By Xiangqiang WU [View]
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Abstract: In this paper, a sizing methodology is proposed for a grid-connected PV and hybrid energy storage system, which is used to determine the capacity share ratio of the Li-ion battery and the supercapacitor. Based on one case of the PV and the load mission profiles, the proposed sizing scheme can reduce the cycle numbers of the Li-ion battery and utilize the supercapacitor most, hence improving the self-consumption of the PV system with hybrid energy storage.

EPE 2022 - DS2j: Energy Storage Systems for Renewable Energy including Power-to-Gas
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2022 ECCE Europe - Conference > EPE 2022 - Topic 06: Grids, Smart Grids, AC & DC > EPE 2022 - DS2j: Energy Storage Systems for Renewable Energy including Power-to-Gas
	[return to parent folder]

	AC Battery: Modular Layout with Cell-level Degradation Control By Claudio BURGOS	[View] [Download]
Abstract: This paper proposes a three-phase AC battery based on the modular multilevel converter (M2C). TheAC battery concept allows plug-and-play combinatorial integration of diverse battery cells with different characteristics such as nominal voltage, state of charge (SoC), and degradation levels. The resulting modular and reconfigurable battery pack can cost-effectively cover various applications, from electrified vehicles to stationary storage. To this end, in each sub-module (SM) of the M2C, battery cells (or battery modules composed of one or more battery cells) are connected to a single capacitor, thus enabling a cell-to-cell battery integration and control. In this scenario, the traditional battery management system (BMS) can be replaced by control schemes at the converter level, aiming to equalise critical parameters associated with battery cells (or battery modules). In this context, the degradation level of battery cells integrated by the proposed AC battery is a critical parameter to be considered. Indeed, it is likely that the integrated battery cells by the AC battery have different degradation levels. Therefore, methods for managing their degradation state are required to equalise the lifespan of battery cells within the AC battery. Based on that, this paper proposes a consensus-based distributed control scheme to manage the degradation process of battery cells (or battery modules composed of one or more battery cells) within the AC battery. Simulation results corroborate the effectiveness of the proposal.

	An Electrically Driven Gas Compressor for Hydrogen Refueling Stations with Active Power Smoothing By Alfred RUFER	[View] [Download]
Abstract: A new electrically driven gas booster is described as an alternative to the classical air-driven gasboosters known for their poor energetic efficiency. These boosters are used in hydrogen refuelingstations where the global energy account is of significancy. The proposed system uses a commoncrankshaft and two connecting rods to transform the rotational motion of the motor to the lineardisplacement of the original compressor pistons. The strongly fluctuating power of the compressor issmoothed by an active capacitive auxiliary storage device connected to the DC circuit of the powerconverter that feeds the electric motor.The paper describes the typical behaviour of the compressor and of the coupling mechanism from thepoint of view of the needed forces, torques and power. The design of the auxiliary storage capacitor isgiven and the very specific waveforms are represented

	Sizing of Hybrid Energy Storage System for Residential PV Applications By Xiangqiang WU	[View] [Download]
Abstract: In this paper, a sizing methodology is proposed for a grid-connected PV and hybrid energy storage system, which is used to determine the capacity share ratio of the Li-ion battery and the supercapacitor. Based on one case of the PV and the load mission profiles, the proposed sizing scheme can reduce the cycle numbers of the Li-ion battery and utilize the supercapacitor most, hence improving the self-consumption of the PV system with hybrid energy storage.