Controlling the Both DC Boost and AC Output Voltages of a Z-Source Inverter Using Neural Network Controller with Minimization of Voltage Stress Across Devices

This paper presents a method to control both the dc boost and ac output voltages of Z-source inverter using neural network controllers. The capacitor voltage of the Z-source network has been controlled linearly in order to improve the transient response of the dc boost voltage of the Z-source inverter. The peak value of the line to line ac output voltage is used to control and keep the ac outputs to their desired values. A modified space vector pulse-width-modulation method is also applied to control the shoot-through duty ratio for boosting dc voltage. This modified method lets to minimize the dc voltage stress across the inverter switches. The neural network control technique is verified with simulation results and compared with the traditional PI controller responses.