Photovoltaic DC-to-AC power converter and control method

Details Photovoltaic DC-to-AC power converter and control method Photovoltaic DC-to-AC power converter and control method

2008-01-15

2008-01-15

Han, Jessica (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

C323S285000

Reexamination Certificate

active

11161639

ABSTRACT:
An apparatus and method of control for converting DC (direct current) power from a solar photovoltaic source to AC (alternating current) power. A novel DC-to-AC power converter topology and a novel control method are disclosed. This combination of topology and control are very well suited for photovoltaic microinverter applications. Also, a novel variant of this control method is illustrated with a number of known photovoltaic DC-to-AC power converter topologies. The primary function of both control methods is to seek the maximum power point (MPP) of the photovoltaic source with novel, iterative, perturb and observe control algorithms. The control portion of this invention discloses two related control methods, both an improvement over prior art by having greatly improved stability, dynamic response and accuracy.

REFERENCES:
patent: 6271651 (2001-08-01), Stratakos et al.
patent: 6304065 (2001-10-01), Wittenbreder
patent: 6850044 (2005-02-01), Hansen et al.

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