Use of PLL stability for islanding detection

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United States of America Patent

PATENT NO 8823416
APP PUB NO 20120013376A1
SERIAL NO

13182978

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Abstract

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A phase detector for a phase-locked loop includes a phase detector that is configured to become unstable, oscillate and drift rapidly in frequency in a predictable manner when a reference frequency signal is not available. When applied, for example, to a power converter connected to a power distribution grid, the predictable oscillatory and rapid frequency drift behavior when the phase detector is unstable allows very rapid and reliable detection of disconnection from the grid, referred to as islanding.

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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
Burgos, Rolando Blacksburg, US 31 118
Thacker, Timothy N Christiansburg, US 1 14
Wang, Fred Knoxville, US 7 110

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