Electric power conversion systems – Current conversion – With condition responsive means to control the output...
Reexamination Certificate
2007-01-02
2007-01-02
Berhane, Adolf (Department: 2838)
Electric power conversion systems
Current conversion
With condition responsive means to control the output...
Reexamination Certificate
active
10836631
ABSTRACT:
A power system employs an outer voltage feedback loop and an inner current feedback loop to control a power converter, such as a DC to AC inverter for transferring electrical power between a power source, for example a photovoltaic array, and a load, for example a power grid. The outer loop accommodates variations in the output of the power source, for example accommodating anomalies in IV characteristics such as IV droop characteristic associated with photovoltaic cells. The outer loop may employ a first control regime or a second control regime, for example, dependent on whether a DC bus voltage or power is smaller than a value corresponding to measurement resolution or expected noise.
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Deng Duo
Farkas Kenneth J.
Grand Kerry E.
Tuladhar Anil
Ballard Power Systems Corporation
Berhane Adolf
Seed IP Law Group PLLC
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