K. Edelmoser, F. Himmelstoß:
"Optimized DC-to-AC Power Inverter for Power Grid Operation";
Talk: International Power Electronics and Motion Control Conference (EPE-PEMC), Riga, Latvia; 09-02-2004 - 09-04-2004; in: "11th International Power Electronics and Motion Control Conference (EPE-PEMC)", (2004), ISBN: 9984-32-010-3; Paper ID A32545.

State-of-the-art power inverters used in mains
coupled applications mostly struggle with the problem of the
hard switched PWM power stage operating at high DC-link
voltages [1,2]. Also soft switching topologies do not satisfy on all
accounts. In this paper the combination of simple boost- and
buck converter stages makes it possible to realize an optimal
design for power grid coupled inverters. The reduced voltage
stress of each stage can lead to a significant improvement of the
system losses. Furthermore, it is shown that a revised method of
energy storage in the `weak’ DC-link can be used to smooth the
input current. Sharing of the energy flow in each power stage
can also lead to reduce losses. The topology presented here
shows a remarkable improvement of the switching losses and
significantly reduced EMC. It is well suited for solar power and
battery powered inverter applications.

http://aleph.ub.tuwien.ac.at/F?base=tuw01&func=find-c&ccl_term=AC04968004