Author/Authors :
Fallah-Ardashir, Jaber Department of Electronics - Tabriz Branch, Islamic Azad University, Tabriz, Iran , Mohammadpour Shotorbani, Amin School of Engineering - University of British Columbia - Okanagan Campus, Kelowna, BC, Canada , Khoun-Jahan, Hossein School of Engineering - University of British Columbia - Okanagan Campus, Kelowna, BC, Canada , sabahi, Mehran Faculty of Electrical and Computer Engineering - University of Tabriz, Tabriz, Iran
Abstract :
This paper presents a single-phase transformer-less Flying Capacitor Inverter (FCI) for grid-tied PV systems with
Fractional Proportional Resonant (FPR) controller. In this structure, the neutral point of the grid is connected
directly to the negative terminal of PV, so the Common Mode (CM) leakage current eliminate without using any
control strategy. The main merits of this inverter are flexible grounding configuration and high safety. The FPR
controller is employed for FCI. The low output current ripple of the FPR controller against parameter uncertainties is
compared with conventional Proportional Resonant (PR) controller. The capability of controllers is investigated for
parametric changes. The grid connected inverter can achieve the Maximum Power Point Tracking (MPPT) of the
solar panels and inject a sinusoidal current into the grid with FPR controller. Finally, performance of the proposed
controller scheme as well as the grid-tied FCI topology are verified through simulation results.
