Novel dc/dc choppers with circuit breaker functionality for HVDC transmission lines
Highlights
•Proposed two converter topologies used as dc circuit breakers for HVDC transmission.
•Proposed configurations are promising for future practical development as they are less costly.
•Proposed auxiliary controller ensures the short-circuit faults shut-down completely.
•An isolation time of 6.5 ms has been achieved by proposed controller.
•The proposed circuit breaker can switch between step-up and step-down modes smoothly.