In the new energy power system, circuit breakers are the core equipment to ensure safe and stable operation. It can not only quickly cut off the fault current of photovoltaic arrays and wind turbine generators to prevent equipment damage, but also adapt to the intermittent and fluctuating characteristics of new energy power generation. Intelligent circuit breakers, through real-time monitoring and remote control functions, can automatically identify and isolate abnormal working conditions in microgrids and energy storage systems, significantly enhancing system reliability. In DC power transmission and distribution scenarios, dedicated DC circuit breakers have solved the problem of fault isolation for long-distance transmission of new energy. Meanwhile, circuit breakers also participate in reactive power compensation and power quality regulation, facilitating the efficient grid connection of new energy. With the increasing proportion of renewable energy, circuit breaker technology featuring advanced characteristics such as rapid breaking and adaptive protection is becoming an important support for building a new type of power system.