A New DC-DC Converter for Photovoltaic Systems: Coupled-Inductors Combined Cuk-SEPIC Converter
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Publication Date
2019Journal Title
IEEE Transactions on Energy Conversion
ISSN
0885-8969
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Volume
34
Issue
1
Pages
191-201
Type
Article
Metadata
Show full item recordCitation
Nathan, K., Ghosh, S., Siwakoti, Y., & Long, T. (2019). A New DC-DC Converter for Photovoltaic Systems: Coupled-Inductors Combined Cuk-SEPIC Converter. IEEE Transactions on Energy Conversion, 34 (1), 191-201. https://doi.org/10.1109/TEC.2018.2876454
Abstract
Abstract—An enhanced DC-DC converter is proposed in this
paper, based on the combination of the Cuk and SEPIC converters,
which is well-suited for solar photovoltaic (PV) applications.
The converter uses only one switch (which is ground-referenced,
so simple gate drive circuitry may be used), yet provides dual
outputs in the form of a bipolar DC bus. The bipolar output
from the DC-DC converter is able to send power to the grid via
any inverter with a unipolar or bipolar DC input, and leakage
currents can be eliminated if the latter type is used without
using lossy DC capacitors in the load current loop. The proposed
converter uses integrated magnetics cores to couple the input and
output inductors, which significantly reduces the input current
ripple and hence greatly improves the power extracted from the
solar PV system. The design methodology along with simulation,
experimental waveforms, and efficiency measurements of a 4
kW DC-DC converter are presented to prove the concept of the
proposed converter. Further, a 1 kW inverter is also developed
to demonstrate the converter’s grid-connection potential.
Identifiers
External DOI: https://doi.org/10.1109/TEC.2018.2876454
This record's URL: https://www.repository.cam.ac.uk/handle/1810/285793
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