LAPSE:2023.23957
Published Article
LAPSE:2023.23957
Energy Storage for 1500 V Photovoltaic Systems: A Comparative Reliability Analysis of DC- and AC-Coupling
March 27, 2023
There is an increasing demand in integrating energy storage with photovoltaic (PV) systems to provide more smoothed power and enhance the grid-friendliness of solar PV systems. To integrate battery energy storage systems (BESS) to an utility-scale 1500 V PV system, one of the key design considerations is the basic architecture selection between DC- and AC-coupling. Hence, it is necessary to assess the reliability of the power conversion units, which are not only the key system components, but also represent the most reliability-critical parts, in order to ensure an efficient and reliable 1500 V PV-battery system. Thus, this paper investigates the BESS solutions of DC- and AC-coupled configurations for 1500 V PV systems with a comparative reliability analysis. The reliability analysis is carried out through a case study on a 160 kW/1500 V PV-system integrated DC- or AC-coupled BESS for PV power smoothing and ramp-rate regulation. In the analysis, all of the DC-DC and DC-AC power interfacing converters are taken into consideration along with component-, converter-, and system-level reliability evaluation. The results reveal that the reliability of the 1500 V PV inverter can be enhanced with the DC-coupled BESS, while seen from the system-level reliability (i.e., a PV-battery system), both of the DC- and AC-coupled BESSs will affect the overall system reliability, especially for the DC-coupled case. The findings can be added into the design phase of 1500 V PV systems in a way to further lower the cost of energy.
Record ID
Keywords
1500 V photovoltaic (PV), cost-oriented design, Energy Storage, reliability
Subject
Suggested Citation
He J, Yang Y, Vinnikov D. Energy Storage for 1500 V Photovoltaic Systems: A Comparative Reliability Analysis of DC- and AC-Coupling. (2023). LAPSE:2023.23957
Author Affiliations
He J: Department of Energy Technology, Aalborg University, 9220 Aalborg, Denmark [ORCID]
Yang Y: Department of Energy Technology, Aalborg University, 9220 Aalborg, Denmark [ORCID]
Vinnikov D: Department of Electrical Power Engineering and Mechatronics, Tallinn University of Technology, 19086 Tallinn, Estonia
Yang Y: Department of Energy Technology, Aalborg University, 9220 Aalborg, Denmark [ORCID]
Vinnikov D: Department of Electrical Power Engineering and Mechatronics, Tallinn University of Technology, 19086 Tallinn, Estonia
Journal Name
Energies
Volume
13
Issue
13
Article Number
E3355
Year
2020
Publication Date
2020-07-01
Published Version
ISSN
1996-1073
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Original Submission
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PII: en13133355, Publication Type: Journal Article
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Published Article
LAPSE:2023.23957
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doi:10.3390/en13133355
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[v1] (Original Submission)
Mar 27, 2023
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Mar 27, 2023
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