NDLI: Multi-string single-stage grid-connected inverter for PV system

Content Provider	IEEE Xplore Digital Library
Author	Yaow-Ming Chen Kuo-Yuan Lo Yung-Ruei Chang
Copyright Year	2011
Description	Author affiliation: Department of Mechanical and System Engineering, Institute of Nuclear Energy Research, No. 1000, Wenhua Road., Longtan, Township, Taoyuan, Taiwan (Yung-Ruei Chang) \|\| Electric Energy Processing Research Lab. (EEPro), Department of Electrical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei, Taiwan (Yaow-Ming Chen; Kuo-Yuan Lo)
Abstract	The objective of this paper is to propose a multi-string single-stage grid-connected inverter (MSG-inverter) for PV power generation system. The proposed MSG-inverter can improve the power conversion efficiency, increase the overall PV array output power, reduce the output inductor size, eliminate the input current sensor, and simplify the control circuit. The proposed MSG-inverter is composed of distributed buck-boost type dc-ac inverters (BBIs) and an ac-ac filter. The distributed BBIs can eliminate the shading effect while fulfill the functions of dc-ac conversing and the maximum power point tracking (MPPT). The ac-ac filter is realized by 4 active switches operated at low switching frequency and an output inductor. It can convert the high frequency pulsating ac current generated by the distributed BBIs into a sinusoidal one with utility line frequency. Based on the developed equations, the MPPT feature of the proposed BBI can be achieved without the need of input current sensor. Also, with the interleaved operation between distributed BBIs, the current ripple of the output inductor can be reduced too. The computer simulations and hardware measurements are shown to confirm the validity of the operation principle of the proposed MSG-inverter.
Starting Page	2751
Ending Page	2756
File Size	673368
Page Count	6
File Format	PDF
ISBN	9781457705427
e-ISBN	9781457705410
DOI	10.1109/ECCE.2011.6064138
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-09-17
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Computer simulation Capacitors Inverters Power conversion Arrays Inductors Power generation
Content Type	Text
Resource Type	Article

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