Refine Control Methodology and Implementation of Capacitor Voltage
Control for Improved Switched Inductor Z-Source Inverter
Abstract
Nowadays, Z-source inverter has received several attentions
compared to the other power converters owing to its simplicity and
reliability. In this paper, a refine control methodology of capacitor
voltage control is presented based on third-order small signal analysis.
The proposed control is applied to the improved switched inductor
Z-Source inverter (ISL ZSI). Proportional, integral and derivative
controller (PID) is adopted due to its capability to operate with large
operation levels , reliable operation, and cheaper in implementation. In
addition, the function of this control can be achieved even with
incomplete system data or parameters variations. ISL-ZSI has
been presented because of its advantages such as the high gain of DC
voltage, low voltage stress for both the Z-network and the inverter
bridge switches and ensure good soft starting. in addition, the inrush
current has been removed based on its configuration. The proposed
control is validated by both experimental and simulation results under
input voltage change, load change, and steady state operations using DSP
F28335 and MATLAB SIMULINK Real-Time Workspace (RTW).
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