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PV Micro-Inverter Topology Using LLC Resonant Converter.
- Source :
-
Energies (19961073) . Aug2019, Vol. 12 Issue 16, p3106-3106. 1p. 9 Diagrams, 4 Charts, 3 Graphs. - Publication Year :
- 2019
-
Abstract
- In this paper, a DC–single-phase AC power converter with an LLC resonant converter is presented for a photovoltaic (PV) micro-inverter application. This application requires the leakage current suppression capability. Therefore, an isolated power converter is usually combined for DC/AC systems. The LLC resonant converter is the one of the isolated power converter topologies, and it has good performance for conversion efficiency with easy control. On the other hand, a double-line frequency power ripple has to be compensated for in order to improve the performance of the maximum power point tracking (MPPT). Therefore, a bulky electrolytic capacitor is usually necessary for the power converter. However, the electrolytic capacitor may limit the lifetime of the micro-inverter. This paper introduces the PV micro-inverter with a LLC resonant converter. In addition, the active power decoupling circuit is applied in order to compensate the double-line frequency power ripple by the small capacitor in order to eliminate the electrolytic capacitor. Finally, the transformer design is considered in order to reduce the transformer losses. As a result, the conversion efficiency of the LLC converter is improved by 1% when the litz wire has many strands. [ABSTRACT FROM AUTHOR]
- Subjects :
- *ELECTRIC network topology
*ELECTROLYTIC capacitors
*TOPOLOGY
*CAPACITORS
Subjects
Details
- Language :
- English
- ISSN :
- 19961073
- Volume :
- 12
- Issue :
- 16
- Database :
- Academic Search Index
- Journal :
- Energies (19961073)
- Publication Type :
- Academic Journal
- Accession number :
- 138176183
- Full Text :
- https://doi.org/10.3390/en12163106