Table 5 Comparison between ABB, Alstom, and Siemens CBs
From: Circuit breakers in HVDC systems: state-of-the-art review and future trends
Types of CB | Description |
|---|---|
ABB | With 320Â kV rated voltage and 9 kA current breaking capability Uses series connection of IGBTs in the auxiliary branch Fast switching capability Cannot tolerate the high peak current during DC faults |
Alstom | Water cooling system is needed for LCS With 160Â kV rated voltage and 7.5 kA current breaking capability Uses thyristor stacks in series with a capacitor Can withstand a high fault current Turning the thyristors off is the main challenge |
Siemens | Uses an uncharged capacitor instead of power electronic switches in the auxiliary branches Possible use of one or more varistors in combination with CB High impedance fault current breaking is the main challenge |