| Abstract |
During the past few years the development of small inverters for photovoltaic technology has been supported by creating small, expandable energy supply systems. In order to reduce the high costs for solar technology nowadays, mainly the costs of the power conditioning have to be reduced. Therefore, the derivation of several transformerless inverter topologies will be presented here, which allow to connect a low generator voltage to the utility grid. Their conduction mode, DC- and AC-signal behaviour and modelling will be discussed. The theoretical results will be verified in a test circuit for stand alone systems. |
