Evaluation based on performance and failure of PV system in 10 years field-aged 1 MW PV power plant
- Authors
- Oh, Wonwook; Choi, Hoonjoo; Seo, Kun Won; Kim, Daesung; Kim, So-Yeon; Lee, Hae-Seok; Hwang, Heon; Kim, Donghwan
- Issue Date
- 11월-2020
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Citation
- MICROELECTRONICS RELIABILITY, v.114
- Indexed
- SCIE
SCOPUS
- Journal Title
- MICROELECTRONICS RELIABILITY
- Volume
- 114
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/52057
- DOI
- 10.1016/j.microrel.2020.113763
- ISSN
- 0026-2714
- Abstract
- PV (Photovoltaic) power systems have been rapidly installed and spreading worldwide in recent years. And there is a belief that the PV power plant will operate stably for more than 25 years. However, the PV modules have an unexpected failure. In this paper, we diagnosed a 10-year-old power plant using drone with infra-red (IR) camera, current-voltage (I-V) and electroluminescence (EL) measurement. The approximately 1 MW plant, consisting of two different PV modules, 200 W and 220 W, showed various failure modes. 59% PV modules failure caused an output loss, and an inverter with a serious loss is expected to degrade more than its annual degradation rate in PV strings above 40%. As a result, the power loss was quantitatively estimated to hot spot, bypass diode failure and degradation rate, and the capacity of the current PV system was evaluated at 88.3% and 93.2%.
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- Appears in
Collections - Graduate School of Energy and Environment (KU-KIST GREEN SCHOOL) > Department of Energy and Environment > 1. Journal Articles
- College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles
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