Non-Linear Control of Quasi-Z-Source Inverter with Battery for Renewable energy Systems Based on Interconnection-Damping-Assignment Passivity-Based Control
Subject Areas : Electrical EngineeringGholam Reza Shahabadi 1 , Majid Reza Naseh 2 , Siavash Eshaghi 3
1 - Department of Electrical Engineering, University of Applied Science and Technology, Tehran, Iran
2 - Department of Electrical Engineering, Birjand Branch, Islamic Azad University, Birjand, Iran
3 - Department of Electrical Engineering, Birjand Branch, Islamic Azad University, Birjand, Iran
Keywords:
Abstract :
Due to the growing popularity of renewable energy sources, grid-connected inverters are becoming more and more common in distributed microgrid and smart-grid system. The appropriate characteristics of Quasi-Z-source inverters (QZSI), including continuous input 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 order to store energy when the demand for power is low. IN this study a configuration involving a battery across one of the capacitors on the DC side is proposed, through which the 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 output voltage. Compared to other controllers, the proposed controller can provide faster response and better stability for QZSI when the variation of input and load. In addition, the proposed controller is not sensitive to the system’s initial operating point and is global asymptotic stability. The simulations and theoretical design show the effectiveness of the proposed controller.
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