Grid Connected Pv Systems Design And Installation 7Th Edition Pdf

When the inverter switches algorithms, it could operate at a not optimal efficiency for 10 minutes up to two hours dependent of the available irradiance, the inverter will then operate at a high efficiency for as long as it is operating with one specific algorithm. This was found to be a result of the inverter using two di↵erent algorithms for low and high irradiance.

Results indicate that the inverter efficiency drops during early and late operating hours on sunny days, as well as during midday on cloudy days.

From when the system started commissioning to when this thesis was finalized, approximately one month of measurements was recorded, providing information on how the inverter operated on clear and cloudy days as well as days with overirradiance. The PV system was estimated to have a system loss of 20.4 % and a yearly production of 2088 kWh with an average performance ratio of 80 %, which is considered to be good for a small PV system with aged PV modules. To investigate the opportunities in Grimstad, a Theia HE-t 3.8 string inverter from Eltek was installed along with 23 de-rated PV modules to constitute a PV system of 2.116 kWp. This thesis addresses the initial steps of planning and building a PV system to analysing how the inverter handles the varying irradiance in southern Norway. Irradiation measurements done for southern Norway indicates that the conditions for more PV systems being installed are good when comparing irradiation in Grimstad to Hamburg. University of Agder, 2014 Faculty of Engineering and Science Department of Engineering SciencesĪbstract As the worlds electrical demand is being more covered by photovoltaic (PV) systems, Germany installed 3.3 GW of the worlds PV systems in 2013 compared to 0.6 MW being installed in Norway. However, this does not imply that the University answers for the methods that are used or the conclusions that are drawn. This master’s thesis is carried out as a part of the education at the University of Agder and is therefore approved as a part of this education. Design and Installation of a Grid-Connected PV System

Grid Connected Pv Systems Design And Installation 7Th Edition Pdf