Data processing: measuring – calibrating – or testing – Testing system – For transfer function determination
Reexamination Certificate
2005-02-08
2005-02-08
Hoff, Marc S. (Department: 2857)
Data processing: measuring, calibrating, or testing
Testing system
For transfer function determination
C702S108000, C702S109000, C702S124000
Reexamination Certificate
active
06853940
ABSTRACT:
A device and method for detecting islanding of a grid connected inverter makes use of an injected white noise as a perturbing force on the output voltage of the inverter. The white noise is injected at least once in every cycle and can be generated at different rates in implementation. On loss of the grid, a frequency drift of the output voltage is detected and a positive feedback is activated that accelerates the drift.
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Duo Deng et al., U.S. patent application No. 10/328,934, filed Dec. 23, 2002, entitled “Device and Method for Detecting Islanding Operation of a Static Power Source.”.
Ballard Power Systems Corporation
Hoff Marc S.
Seed IP Law Group PLLC
Suarez Felix
LandOfFree
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