Investigating several inverter topologies, amplifying the low voltage of photovoltaic modules to the higher level voltage of the network and converting it from DC to AC

This paper focuses on the latest development of inverters for photovoltaic AC-Modules. The power range for these inverters is usually within ۹۰ Watt to ۵۰۰ Watt, which covers the most commercial photovoltaic-modules. Self-commutated inverters have replaced the grid-commutated ones. The same is true for the bulky low-frequency transformers versus the high-frequency transformers, which are used to adapt the voltage level. The AC-Module provides a modular design and a flexible behavior in various grid conditions. It hereby opens the market for photovoltaic-power for everyone at a low cost due to the plug and play concept, which also makes a further enlargement of the system possible.

Keywords:

photovoltaic , single-phase grid-connected inverter , renewable energy.