A Photo-Voltaic System with Load Control

This paper describes the design of a fixed photo-voltaic (PV) system that consists of the modules array, DC-AC inverter and switches. The short-circuit current and open-circuit voltage of the 66 modules of the system have been investigated in natural conditions. The PV system, with the crystalline and multi-crystalline modules of area 0.384 m², and 0.391 m² respectively, is able to provide an average electric power of ~1.6 kW. The inclination angle between the module and the horizontal plane was equal to 45deg. Current-voltage characteristics of the PV system were obtained by simulation at different intensities of solar radiation. Matching of the PV system with load was done by load control method: end-users are switched automatically to provide optimum power transfer from PV generator into load at variable intensity of solar radiation. The PV system can be operated in the mode of grid-connected or stand alone modes. The cost and benefit analysis of the designed PV system was done.