DocumentCode :
1353162
Title :
A Novel PV Microinverter With Coupled Inductors and Double-Boost Topology
Author :
Fang, Yu ; Ma, Xudong
Author_Institution :
Key Lab. of Meas. & Control of Complex Syst. of Eng. (MCCSE), Southeast Univ. (SU), Nanjing, China
Volume :
25
Issue :
12
fYear :
2010
Firstpage :
3139
Lastpage :
3147
Abstract :
A coupled-inductor double-boost inverter (CIDBI) is proposed for microinverter photovoltaic (PV) module system, and the control strategy applied to it is analyzed. Also, the operation principle of the proposed inverter is discussed and the gain from dc to ac is deduced in detail. The main attribute of the CIDBI topology is the fact that it generates an ac output voltage larger than the dc input one, depending on the instantaneous duty cycle and turns ratio of the coupled inductor as well. This paper points out that the gain is proportional to the duty cycle approximately when the duty cycle is around 0.5 and the synchronized pulsewidth modulation can be applicable to this novel inverter. Finally, the proposed inverter servers as a grid inverter in the grid-connected PV system and the experimental results show that the CIDBI can implement the single-stage PV-grid-connected power generation competently and be of small volume and high efficiency by leaving out the transformer or the additional dc-dc converter.
Keywords :
DC-DC power convertors; inductors; optical modulation; photovoltaic power systems; CIDBI topology; control strategy; coupled inductor; coupled-inductor double-boost inverter; dc-dc converter; grid inverter; instantaneous duty cycle; microinverter photovoltaic module system; operation principle; synchronized pulsewidth modulation; Converters; Equivalent circuits; Inductors; Inverters; Photovoltaic systems; Switches; Boost converter; coupled inductor; inverter; photovoltaic (PV) grid power;
fLanguage :
English
Journal_Title :
Power Electronics, IEEE Transactions on
Publisher :
ieee
ISSN :
0885-8993
Type :
jour
DOI :
10.1109/TPEL.2010.2087417
Filename :
5604322
Link To Document :
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