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- Title
A control strategy to enhance the life time of the battery in a stand-alone PV system with DC loads.
- Authors
Maheswari, Lakshmanan; Sivakumaran, N.; Rao, P. Srinivasa; Ilango, G. Saravana; Nagamani, Chilakapati
- Abstract
This study proposes a unique control strategy to enhance the life time of the battery in a stand-alone photovoltaic (PV) system employing energy storage devices such as battery and super capacitor. The intermittent fluctuations in PV power and load power affect the DC bus voltage leading to a random and frequent charging/discharging profile of the battery since the controlling converters are operated as constant voltage sources. To overcome this drawback, the supercapacitor converter is commanded as a constant voltage source so as to adapt to varying load conditions and the battery converter is commanded as a constant current source. This strategy helps to decouple the power imbalances from the charge–discharge profile of battery, thereby contributing to the improved battery life. The detailed experimental results are presented. Further, the proposed control strategy is tested and validated under various scenarios.
- Subjects
ELECTRIC batteries research; PHOTOVOLTAIC power systems; SUPERCAPACITORS; ELECTRIC potential; FOSSIL fuels
- Publication
IET Power Electronics (Wiley-Blackwell), 2017, Vol 10, Issue 9, p1087
- ISSN
1755-4535
- Publication type
Article
- DOI
10.1049/iet-pel.2016.0735