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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Casaro, M.M. Martins, D.C. |
| Copyright Year | 2008 |
| Description | Author affiliation: Fed. Univ. of Technol. - Parana, Ponta Grossa (Casaro, M.M.) || Power Electron. Inst., Fed. Univ. of Santa Catarina, Florianopolis (Martins, D.C.) |
| Abstract | This paper presents a PV grid-connected system in centralized configuration and constructed with a three-phase dual-stage inverter. In this topology, usually, a DC-DC converter performs the maximum power point tracking (MPPT) and an inverter is responsible for controlling of the grid-current. For the DC-DC stage the three-phase series resonant converter (SRC3) is chosen thanks to the very advantages that it exhibit. However, it is inadequate for the accomplishment of MPPT, due that its efficiency extremely depends on the implemented deadtime and switching frequency. Then, this paper proposes a conceptual modification, i.e., a dual-stage inverter in which the inverter stage is responsible for the MPPT and the grid-current control. In addition, the DC-DC converter operates with constant duty cycle and frequency. Such configuration requires a new concept, introduced as behavior matching. It serves as fundamental feature for the DC-DC converter to reproduce the PV array I-V characteristic when they are connected, without control action. The maximum power operating point (MPOP) is finding maximizing the direct axis current, obtained by Parkpsilas transformation from the inverter, through the perturbation and observation algorithm (P&O). Any specific measurement to MPPT is made. The isolation is performed by a high-frequency transformer becoming the system most compact. The structure is appropriate for high power applications, above 10 kW. |
| Starting Page | 12 |
| Ending Page | 17 |
| File Size | 946058 |
| Page Count | 6 |
| File Format | |
| ISBN | 9781424418879 |
| DOI | 10.1109/ICSET.2008.4746964 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2008-11-24 |
| Publisher Place | Singapore |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Photovoltaic systems Switching frequency DC-DC power converters Frequency conversion Inverters Resonance Power electronics Topology Distributed power generation Solar power generation |
| Content Type | Text |
| Resource Type | Article |
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