Building Integrated PhotoVoltaics suffer for mismatching among the operating conditions of different regions of installations. Safety is another typical concern. In this work, we propose to face both issues by arranging the solar array in several sections provided with individual converters, capable to operate in the MPPT mode. Each converter is insulated, so that several converters are connected in series in order to reach the desired dc-link voltage, while maintaining the maximum voltage across the solar array within safety limits. The approach was tested by means of a demonstrator consisting of N3 flyback converters. Each converter was equipped with separate MPPT. The proposed system was characterised under variable shading conditions. We verified that the dc-link voltage tends to distribute among outputs of single module converters proportionally to the respective input power. In the presence of high levels of shading it was advantageous with respect to other PV plant configurations. © 2013 IEEE.
Series-connected converters with individual MPPT for BIPV / Macellari, Michele; Grasselli, Umberto; GIULII CAPPONI, Fabio; Schirone, Luigi. - (2013), pp. 52-56. (Intervento presentato al convegno 4th International Conference on Clean Electrical Power: Renewable Energy Resources Impact, ICCEP 2013 tenutosi a Alghero nel 11 June 2013 through 13 June 2013) [10.1109/iccep.2013.6586965].
Series-connected converters with individual MPPT for BIPV
MACELLARI, MICHELE;GRASSELLI, Umberto;GIULII CAPPONI, Fabio;SCHIRONE, Luigi
2013
Abstract
Building Integrated PhotoVoltaics suffer for mismatching among the operating conditions of different regions of installations. Safety is another typical concern. In this work, we propose to face both issues by arranging the solar array in several sections provided with individual converters, capable to operate in the MPPT mode. Each converter is insulated, so that several converters are connected in series in order to reach the desired dc-link voltage, while maintaining the maximum voltage across the solar array within safety limits. The approach was tested by means of a demonstrator consisting of N3 flyback converters. Each converter was equipped with separate MPPT. The proposed system was characterised under variable shading conditions. We verified that the dc-link voltage tends to distribute among outputs of single module converters proportionally to the respective input power. In the presence of high levels of shading it was advantageous with respect to other PV plant configurations. © 2013 IEEE.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
