Control of an optimized converter for modular solar power generation

Important drawbacks of solar power generation are the DC-wiring and fusing needed for the serial and parallel connection of solar panels. These problems can be reduced to AC wiring and fusing by using a modular set up of panels together with integrated single phase DC-AC power converters on a power level of approximately 200 W. A general applicable model has been developed for the coupling of two single-phase systems by a voltage link with small storage capacitance. It allows the decoupling of the pulsating mains power from the panel. Based on this model, which avoids the need of large filters, a sophisticated control principle has been developed. The result is a power converter which allows the operation in the maximum power point without any power pulsation In the solar panel. The required reactive elements, and therefore the size of the power converter, are very small