High voltage DC circuit breakers can provide protection for multi terminal flexible DC transmission. Multi terminal Flexible DC Transmission (MTFCT) is a new type of DC transmission technology that can achieve flexible power transmission between different voltage levels.

MTFCT technology utilizes multi terminal DC transmission lines to transmit high voltage DC power to lower voltage DC power networks, thereby achieving energy transmission and distribution. In the MTFCT system, high-voltage DC circuit breakers can be used to protect equipment in the DC network from overcurrent, overvoltage, and other faults, thereby ensuring the stability and safety of the DC network.

High voltage DC circuit breakers are usually composed of multiple circuit breakers, each responsible for protecting a section of DC power line. These circuit breakers can be fixed or movable to adapt to different DC network topologies. In multi terminal flexible DC transmission systems, these circuit breakers can also be used to connect DC power networks of different voltage levels to achieve energy transmission and distribution.

In short, high-voltage DC circuit breakers are one of the key equipment in MTFCT technology, which can provide effective guarantees for the stability and safety of DC power networks.