Due to dynamic interaction between converters

design of control parameters of multi-converters medium-voltage DC (MVDC) power system is much more complicated than of a single-converter situation. Open-loop and closed-loop transfer functions considering control-loops dynamic interaction between converters are developed

which are suitable for studying influence of control parameters on system stability. With the above transfer functions

a system-level control parameter design proce-dure for dynamic stability (e.g.

oscillation frequency and damping factor) of system is proposed. If there are many converters

computational burden of system-level control parameters design procedure will be huge. For this reason

a control parameter sharing method is further proposed in this paper

which is based on dynamic interaction mechanism between converters. In this sharing method

control parameters of equivalent reduced-order model of the system are shared with each converter

so calculation burden of control parameters of system is reduced significantly. Consequently

dynamic stability of the system can be designed by equivalent reduced-order model. Experiments are conduced to validate the system-level control parameter design procedure.