Anti-islanding protection in three-phase converters using grid synchronization small-signal stability

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United States of America Patent

PATENT NO 8957666
APP PUB NO 20140312882A1
SERIAL NO

13910371

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Abstract

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A small signal feedback loop or feed-forward loop having gain provides substantially unconditional instability in a phase locked loop when a reference phase signal is lost. The small signal feedback or feed-forward also modifies phase locked loop bandwidth when the reference phase signal is lost to increase rapidity of response to loss of reference phase signal while maintaining insensitivity to reference voltage amplitude change while the reference phase signal is present. The performance thus achieved is particularly suitable for rapid condition detection response and control of a grid connected power converter under islanding conditions.

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Patent Owner(s)

  • VIRGINIA POLYTECHNIC INSTITUTE AND STATE UNIVERSITY

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Boroyevich, Dushan Blacksburg, US 27 295
Dong, Dong Blacksburg, US 59 302
Mattavelli, Paolo Blacksburg, US 22 334
Wen, Bo Blacksburg, US 60 203

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