MV & HV DC Circuit Breaker
Description
The first patent addresses an architecture of a MVDC circuit breaker. This patent introduces a time-controlled resistor module in the auxiliary circuit. This module short-circuits a resistor ‘R1’ by closing a by-pass switch ‘MS1’ for controlling the insertion time to limit the rate-of-change of current at its zero crossing and ensuring a fast interruption. It contributes to a compact and cost-efficient DCCB.
The other patent introduces an architecture of a HV DCCB based on the previous MV DCCB architecture. It exploits the phenomenon that a current commutation from a surge arrestor ’MOV1’ to a capacitor ’C2’ can generate an extended recovery period ‘∆t’ without arc to secure the interruption of current. It avoids the use of HV inductor and reduces the volume of HV capacitor.
TRL SCALE
Interruption validated over full current range on prototype.
Advantages
- Low conduction losses
- Cost optimized and footprint reduced
- Load and fault current interruption
- Easy to adapt to client requirements
Applications
- MVDC network protection: distribution, industrial, railway
- HVDC network protection: transmission
Deliverables
- Patent pending : WO2020136340, WO2020136350
- Design consultancy and prototyping
