In order to optimize the system parameters and improve the stability of high frequency Z-source converter

the nonlinear characteristics of high frequency Z-source converter with peak current control are analyzed.Based on the equation of state

an accurate discrete iterative mapping model of the converter in continuous operation mode is established.The improved Jacobian matrix is applied to judge the law of stability of the system that changes with the reference current

Z-source network inductance capacitance

and other different parameters

and to determine the stable operating region of the system.Finally

the correctness of the theoretical analysis is verified by experiments.The results of this paper show that the nonlinear phenomena such as bifurcation and chaos exist in high frequency Z-source converter

when the circuit parameters of the high frequency Z-source converter are defined as the stable region

the stability of the system will be greatly improved

and the reference for the improvement of the control performance can be provided.