Projects per year
Abstract
The installation cost of Photovoltaic (PV) plants can be reduced considerably by extending the maximum DC voltage from 1000 V to 1500 V (e.g., with more PV arrays connected in series). However, the increased DC voltage also presents challenges on the design and operation of PV inverters in terms of efficiency and reliability. To ensure an efficient and reliable PV power conversion, an early-stage reliability assessment is of importance in the design phase of the inverter and then the entire system. This paper, thus, evaluates the lifetime of three-level 1500-V PV inverters with respect to their thermal cycling capabilities both at the component level and system level. The evaluation is carried out through a case study on a 160-kW PV system considering the impact of voltage stress, switching frequency, and mission profile. The evaluation reveals that these factors have a significant impact on the inverter reliability, and thus affect the topology selection and the final cost of the entire PV system. More importantly, the exploration provides insights on the design of 1500-V PV systems seen from the reliability perspective.
Original language | English |
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Journal | I E E E Journal of Emerging and Selected Topics in Power Electronics |
Volume | 9 |
Issue number | 4 |
Pages (from-to) | 4285 - 4298 |
Number of pages | 14 |
ISSN | 2168-6777 |
DOIs | |
Publication status | Published - Aug 2021 |
Keywords
- photovoltaic (PV) inverters
- multi-level inverters
- mission profile
- lifetime
- reliability
Fingerprint
Dive into the research topics of 'Lifetime Evaluation of Three-Level Inverters for 1500-V Photovoltaic Systems'. Together they form a unique fingerprint.Projects
- 1 Finished
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REPEPS: REliable Power Electronic based Power System
Blaabjerg, F., Iannuzzo, F., Davari, P., Wang, H., Wang, X. & Yang, Y.
01/08/2017 → 01/12/2023
Project: Research
Research output
- 30 Citations
- 1 PhD thesis
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Reliability Enhancement of 1500-V DC-link Photovoltaic Power Converters
He, J., 2021, Aalborg Universitetsforlag. 72 p.Research output: PhD thesis
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