Research on hybrid power system of control rod drive Mechanism

•Hybrid power system can not only absorb and store excess energy but also can release and compensate required energy to DC bus, thereby improves the steady-state and dynamic characteristics of CRDM.•Hybrid power system realized self-balance of external energy replenishment and energy storage unit inside in a smooth way at the suitable time.•Control system of hybrid power system maximizes its flexibility and applicability. Moreover, it prolongs the service life of hybrid power system, thereby improves the safety and reliability of the reactor.