Design and Implementation of Single-Phase Grid-Connected Low-Voltage Battery Inverter for Residential Applications
No Thumbnail Available
Access rights
openAccess
URL
Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
This publication is imported from Aalto University research portal.
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
Other link related to publication (opens in new window)
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
Other link related to publication (opens in new window)
Date
2024-03
Major/Subject
Mcode
Degree programme
Language
en
Pages
20
Series
Electronics (Switzerland), Volume 13, issue 6
Abstract
Integrating residential energy storage and solar photovoltaic power generation into low-voltage distribution networks is a pathway to energy self-sufficiency. This paper elaborates on designing and implementing a 3 kW single-phase grid-connected battery inverter to integrate a 51.2-V lithium iron phosphate battery pack with a 220 V 50 Hz grid. The prototyped inverter consists of an LCL-filtered voltage source converter (VSC) and a dual active bridge (DAB) DC-DC converter, both operated at a switching frequency of 20 kHz. The VSC adopted a fast DC bus voltage control strategy with a unified current harmonic mitigation. Meanwhile, the DAB DC-DC converter employed a proportional-integral regulator to control the average battery current with a dynamic DC offset mitigation of the medium-frequency transformer’s currents embedded in the single-phase shift modulation scheme. The control schemes of the two converters were implemented on a 32-bit TMS320F280049C microcontroller in the same interrupt service routine. This work presents a synchronization technique between the switching signal generation of the two converters and the sampling of analog signals for the control system. The prototyped inverter had an efficiency better than 90% and a total harmonic distortion in the grid current smaller than 1.5% at the battery power of ±1.5 kW.Description
Publisher Copyright: © 2024 by the authors.
Keywords
battery storage, DC-DC converter, grid-connected inverter, solar photovoltaic
Other note
Citation
Pannawan, A, Kaewchum, T, Saeseiw, C, Pachanapan, P, Hinkkanen, M & Somkun, S 2024, ' Design and Implementation of Single-Phase Grid-Connected Low-Voltage Battery Inverter for Residential Applications ', Electronics (Switzerland), vol. 13, no. 6, 1014 . https://doi.org/10.3390/electronics13061014