Układ napędowy zasilany z baterii ogniw fotowoltaicznych współpracujący z siecią elektroenergetyczną

Within last few years the possibility of constructing PV low power generators used for electric driving systems feeding emerged. The amount of energy produced by these unconventional energy sources depends on current weather conditions. In this article the electrical drive system fed both from PV arrays and the power grid has been described. It is based on industrial frequency converter with special MPPT control algorithm. This structure is designed to meet requirements of most drive systems, especially 3-phase air conditioning units. Defining the minimum level of output frequency of the frequency converter allows to affect on the amount of energy consumed from the power grid. Despite the weather condition (insolation) PV array always works with maximum possible efficiency.