Simple large-signal model based on gyrator for system level analysis

The stability for complex power electronics system under large disturbance is a key aspect for reliable operation, such as startup and load transient. The large signal model for each module is generally required for system level analysis. Eleven existing methods to establish large-signal models for power electronic converter are reviewed in this paper, which can be classified into three groups. Based on the review, a novel modeling method based on gyrator is proposed. Compared to the existing methods, the proposed model can reduce the system order and is suitable for describing both single and cascaded system with current programmed converters. Simulation and experimental results are presented to verify the feasibility of the gyrator model. Comparisons between these methods are also presented in this paper.