In this paper, the dynamic model of a three-level neutral point
clamped (NPC) converter with neutral-point voltage-balance control (NPVBC)
and input power factor correction for high-speed railway tractions is derived.
And accordingly, a feedback controller is designed to meet the given voltage
regulation control specifications. As the variation of converter parameters occurs,
a compensation signal is yielded by an extension robust controller (ERC)
to preserve the prescribed response. The compensation signal is adaptively
tuned by a model error driven extension weighting controller. Some simulation
results are presented to demonstrate the effectiveness of the proposed controller.
