Islanding detection apparatus for a distributed generation power system and detection method therefor
US7843082B2 · kind B2 · utility
4Cited by
5References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 12, 2006 |
| Grant date | Nov 30, 2010 |
| Priority date | — |
| Expiry date | Mar 11, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J3/388
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An islanding detection apparatus for a distributed generation power system and a detection method therefor operates a power converter to act as a virtual capacitor or inductor at a frequency close to but unequal to that of a utility power system under abnormal condition of the utility power system. When power failure occurs in the utility power system, only the distributed generation power system supplies power to a load so that a load voltage has been changed in at least one of amplitude and frequency which can be immediately detected islanding phenomenon.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.