Use of PLL stability for islanding detection
US8823416B2 · kind B2 · utility
1Cited by
2References
18Claims
0Family size
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Key dates
| Filing date | Jul 14, 2011 |
| Grant date | Sep 2, 2014 |
| Priority date | — |
| Expiry date | Jul 14, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E10/76
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.