一种基于瞬态建模的直流母线电容在线监测灰箱法

This article proposes a suitable grey-box method for online monitoring of dc-link capacitors. It is found that the transient behavior of dc-link voltage in ac/dc and dc/dc converters is similar to the zero-state response of a parallel resistor-inductor-capacitor (RLC) circuit. Moreover, the damping factor α (related to capacitance) of the large-signal transient trajectories of converters can be ch...