Anti-islanding method for distributed generator in direct current distribution grid and anti-islanding device therefor
US9923367B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 27, 2015 |
| Grant date | Mar 20, 2018 |
| Priority date | — |
| Expiry date | Jul 20, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H7/122
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Provided are an anti-islanding method for a distributed generator in a direct current distribution grid and an anti-islanding device therefor. The method includes: feeding an alternating voltage component into an output end of the AC/DC interface transverter, a frequency of the alternating voltage component being less than the power frequency; sampling a first voltage signal of an output end of the DC/DC transverter; extracting a first effective value of an alternating signal included in the first voltage signal; comparing the first effective value with a first preset voltage; and controlling the distributed generator to stop operation, in a case that it is determined that the first effective value is less than the first preset voltage, which indicates that islanding occurs for the distributed generator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.