System and method for islanding detection and prevention in distributed generation
US10069304B2 · kind B2 · utility
2Cited by
6References
20Claims
0Family size
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Key dates
| Filing date | Jun 11, 2015 |
| Grant date | Sep 4, 2018 |
| Priority date | — |
| Expiry date | Jul 27, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J2300/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for detecting and preventing islanding includes issuing a command to an inverter connected to a power source, where the inverter is coupled to a power grid and supplies power to the power grid, the command causes a frequency of a waveform output by the inverter to vary, and the frequency of the waveform output by the inverter is a command frequency, determining that a amount of change of the command frequency is a constant value for a predetermined amount of time, removing the power supplied by the inverter from the power grid, and determining whether the power grid is valid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.