Seamless mode change between grid-connected mode and islanded mode for pv systems
US12401201B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 27, 2022 |
| Grant date | Aug 26, 2025 |
| Priority date | — |
| Expiry date | Jun 21, 2042 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E10/56
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A unified control scheme to achieve seamless mode change between grid-connected mode and islanded mode for photovoltaic (PV) systems includes two decoupled control units: a DC-DC converter control unit and a DC-AC converter control unit. The DC-bus voltage is controlled through the DC-DC converter control unit, which supplies a “stiff DC source” to the DC-AC converter. The seamless mode change is implemented in the DC-AC converter control module via three digital switches between power flow control for grid-connected mode (or MPPT mode), and droop control for islanded mode (or droop mode), while preserving the continuity of control signals in all control units with the configurations of digital switches.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.