Labview-matlab integration for analyzing energy data of PV plants

The paper proposes the design of a Labview interface for acquiring, pre-processing, processing and visualizing data deriving from PhotoVoltaic (PV) plants. Some specific procedures for analyzing the energy performances of PV plants and implemented in Matlab environment have been integrated in the Labview interface. Its user-friendly approach allows the utilization of these complex routines to everybody. As voltage, current and energy of the DC side as well as of the AC side can give useful information about the operation of the PV plant (not only if failure is present but also if little misoperation is), the proposed interface allows also to compare the data of a specific date with other ones. The comparison with the data of the same date of a previous year allows to verify the trend of the performances, provided that similar environmental conditions exist. A real application is presented.