NDLI: Are Manufacturing <formula formulatype=inline> <tex Notation=TeX>$I$</tex></formula>– <formula formulatype=inline> <tex Notation=TeX>$V$</tex></formula> Mismatch and Reverse Currents Key Factors in Large Photovoltaic Arrays?

Content Provider	IEEE Xplore Digital Library
Author	Spertino, F. Akilimali, J.S.
Copyright Year	1982
Abstract	In this paper, two factors typical of large photovoltaic (PV) arrays are investigated: one is the current-voltage (I-V) mismatch consequent to the production tolerance; the other is the impact of reverse currents in different operating conditions. Concerning the manufacturing I-V mismatch, the parameters of the equivalent circuit of the solar cell are computed for several PV modules from flash reports provided by the manufacturers. The corresponding I-V characteristic of every module is used to evaluate the behavior of different strings and the interaction among the strings connected for composing PV arrays. Two real crystalline silicon PV systems of 8 times 250 kW and 20 kW are studied, respectively. The simulation results reveal that the impact of the I-V mismatch is negligible with the usual tolerance, and the insertion of the blocking diodes against reverse currents can be avoided with crystalline silicon technology. On the other hand, the experimental results on I-V characteristics of the aforementioned arrays put into evidence the existence of a remarkable power deviation (3%-4%) with respect to the rated power, linkable to the lack of measurement uncertainty in the manufacturer flash reports.
Sponsorship	IEEE Industrial Electronics Society
Starting Page	4520
Ending Page	4531
Page Count	12
File Size	418746
File Format	PDF
ISSN	02780046
Volume Number	56
Issue Number	11
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-11-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Crystallization Silicon Photovoltaic systems Solar power generation Production Equivalent circuits Photovoltaic cells Computer aided manufacturing Diodes Measurement uncertainty reverse current Blocking diodes equivalent-circuit parameters manufacturing $I$–$V$ mismatch photovoltaic (PV) array PV module
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Electrical and Electronic Engineering Computer Science Applications

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