| Abstract |
A stand-alone photovoltaic system is described. It consists of a DC source (solar cell array), single phase transistor based inverter, transformer and load. The transistor's control voltage Vg determines the 60 Hz frequency of the AC load. The transformer, with a rated power of 2400W, connects the AC (load) and DC (solar cell array ) sides of the system. lts operation has been analyzed. The analysis and experiments have been carried out for the three main loads of consumer applications: resistive loads, universal and induction motors. Due to the non-sinusoidal waveforms of the voltage and current across the windings, the transformer's operational conditions differ from those arising with the sinusoidal waveforms. A detailed analysis of the transformer's operational conditions is carried out. The influence of magnetization current on the current waveforms and the form of the core flux during the cycle are
discussed and explained. A detailed explanation of the waveforms obtained is given. |
