POWER INVERTER FOR FEEDING ELECTRIC ENERGY FROM A DC POWER GENERATOR INTO AN AC GRID WITH TWO POWER LINES

摘要

A power inverter (1) for feeding electric energy from a DC power generator into an AC grid with two-power linescomprises: two input terminals (2, 3) for connecting the power generator; two output terminals (4, 5) for connecting the two power lines of the AC grid; a resonant converter (51) including a high frequency transformer (17) comprising a primary winding (16) and a secondary winding (18), at least one high frequency switched semiconductor power switch (9-12) that connects one end of the primary winding (16) of the high frequency transformer (17) to one of the input terminals (2, 3) for providing a current path through the primary winding (16) to the other one of the input terminals (3, 2), a resonant series circuit (19) comprising an inductance and a capacity, and a high frequency rectifier (22) rectifying a current through the secondary winding (18) of the high frequency transformer (17) and having two output lines (26, 27); and an output converter (31) connected between the output lines (26, 27) of the high frequency rectifier (22) and the two output terminals (4, 5).