Algorithms and devices for the dynamical reconfiguration of PV arrays

Pietro Luigi Carotenuto, Salvatore Curcio, Patrizio Manganiello, Giovanni Petrone, Giovanni Spagnuolo, Massimo Vitelli

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

13 Citations (Scopus)

Abstract

Shadowing, manufacturing tolerances and parametric drifts introduce mismatching effects in photovoltaic (PV) arrays. The consequent power drop can be faced by using power optimizers, which are module dedicated dc/dc converters, or micro-inverters. The main drawbacks of such devices are the high cost and the reduced plant efficiency during the day hours in which the PV array works under a uniform irradiation level. This usually happens in the middle of the day, just when the PV power reaches the peak. Moreover, both the dc/dc and the dc/ac module dedicated converters introduce further components that may reduce the system lifetime, e.g. large electrolytic capacitances. A recent alternative is represented by the dynamical re-configuration of the PV array by means of active switches: in this way, the efficiency under uniform irradiation conditions is preserved and, in presence of mismatching, the best series/parallel modules configuration is achieved. This solution is cheaper than the one involving power optimizers and, besides the possibility of plant monitoring, offers additional advantages in terms of safety in case of fire. An overview of the main reconfiguration algorithms and devices presented in literature and available on the market is given in this paper. Moreover, a novel approach to the PV string dynamical reconfiguration is sketched.

Original languageEnglish
Title of host publicationProceedings - PCIM Europe 2013
Subtitle of host publicationInternational Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
PublisherMesago PCIM GmbH
Pages765-772
Number of pages8
ISBN (Print)9783800735051
Publication statusPublished - 1 Jan 2013
Externally publishedYes
EventInternational Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management, PCIM Europe 2013 - Nuremberg, Germany
Duration: 14 May 201316 May 2013

Publication series

NamePCIM Europe Conference Proceedings
ISSN (Electronic)2191-3358

Conference

ConferenceInternational Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management, PCIM Europe 2013
CountryGermany
CityNuremberg
Period14/05/1316/05/13

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