Anti-islanding protection system
US11095126B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 27, 2019 |
| Grant date | Aug 17, 2021 |
| Priority date | — |
| Expiry date | Feb 27, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J3/381
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Provided is an anti-islanding protection system. The system is applied to a low-voltage distributed generation resource (DGR) and includes a box, a reverse power protector, a protection module and an output controller. The reverse power protector has an end connected to a first current transformer and has another end connected to the output controller. The reverse power protector is configured to provide reverse power protection for the low-voltage DGR. The output controller has an end connected to the protection module and the reverse power protector and has another end connected to a grid-connection switch of the low-voltage DGR. The output controller is configured to control the grid-connection switch to turn off when reserve power is detected. The protection module has an end connected to a second current transformer and has another end connected to the output controller. The protection module is configured to provide low-frequency protection, over-frequency protection, over-voltage protection and low-voltage protection for the low-voltage DGR.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.