High-voltage high-power converters are key equipment in the next generation of power systems and electric traction

however

how to realize the precise control of electric energy conversion and transmission is the core question for high-power electric devices and systems. We present a review of the control technologies for power electronic hybrid systems. The development of control theory and its state-of-the-art applications in power electronic systems are reviewed

the basic principles of power electronic control are analyzed

and several control methodologies suitable for such hybrid systems are discussed

together with their future trends. It is proposed in this paper that the integrated control of continuity-discreetness-continuity process

originated from multi-time scale hybridity

is of the essence

and from such perspective

the future developments of control technologies for power electronics are imagined and expected.