Non-Linear Control of Quasi-Z-Source Inverter with Battery for Renewable energy Systems Based on Interconnection-Damping-Assignment Passivity- Based Control

Due to the growing popularity of renewable energy sources, grid-connected inver ters are becoming more and more common in distributed microgrid and smart-grid system. The appropriate characteristics of Quasi-Z-source inverters (QZSI), including continuous inp ut current, common DC rail, and high voltage gain, have made these inverters widely used in the renewable energy system. A battery is necessary for renewable energy systems in o rder to store energy when the demand for power is low. IN this study a configuration inv olving a battery across one of the capacitors on the DC side is proposed, through which t he DC control loop is adjusted. Also, Interconnection-Damping-Assignment Passivity-Based Control (IDA-PBC)approach has been used to adjust the battery current/voltage and the out put voltage. Compared to other controllers, the proposed controller can provide faster respo nse and better stability for QZSI when the variation of input and load. In addition, the pr oposed controller is not sensitive to the system’s initial operating point and is global asym ptotic stability. The simulations and theoretical design show the effectiveness of the propos ed controller.