What is the OGC functionality
The OGC functionality is an AC-voltage control mode of the ISU. An OGC controlled ISU is designed to supply power from a DC-circuit to a grid. Optimal Grid control can create an island grid alone or feed AC-grid parallel with other power sources like generators or other Optimal Grid control converters.
Where is it intended to be used
The OGC controlled ISU is intended for small, isolated grids (ex: ships) and strong industrial grids. The OGC functionality is a feature collection in standardized product software.
OGC controlled ISU main features
- Droop control (P/f droop and Q/U droop).
- Ability to start to voltage-free grid (aka "black start"), unlike traditional supply units, which always need to be synchronized to grid voltage.
- Short-circuit current contribution for a preset time even if the grid-voltage has collapsed. Unlike a conventional ISU, an OGC controlled ISU can both synchronize the ISU to the grid and operate in shorted grid without grid voltage.
- Ability to supply controlled asymmetric current (positive and negative sequence but not zero sequence), and distorted (non-sinusoidal) current depending on the load.
- Inbuilt compensators for 3rd 5th 7th 11th and 13th harmonic voltage.
- Two different inbuilt synchronizing algorithms.
- Supports both island and parallel operations.
- Voltage supervision.
- Frequency supervision.
- DC-voltage dip ride through.