Published Paper Details:

This paper presents the simulation and implementation of a solar based high stepup transformerless standalone inverter using control techniques. The proposed topology is a two-stage (DC-DC-AC) power conversion topology. In this proposed topology a non-isolated high stepup DC-DC Quadratic Boost converter is coupled with a dynamic dc-link single phase inverter. The front-end Quadratic boost converter is controlled by fuzzy logic controller based Perturb and Observe (P&O) MPPT control technique and the inverter stage is controlled by PR controller based current and voltage control techniques. The performance of the proposed Quadratic boost converter fed inverter configurations is validated through simulation in MATLAB/Simulink platform for hardware implementation, the proposed control techniques are programmed in dsPIC30f2010 Digital Signal Controller. The proposed FLC -P&O MPPT control technique have high efficiency, low overshoot and less oscillation time compared to conventional P&O MPPT technique. The proposed Quadratic boost converter proves good steady state performance, low voltage ripple, current ripple and preserve constant output voltage with the help of FLC. The proposed PR controller based current and voltage control techniques are used to control the inverter output voltage and current by changing the modulation index and maintain zero steady state error in sinusoidal quantities compared to PI controller. The proposed inverter proves good steady state performance, low THD, and preserve constant output voltage with the help of PR controller. The FLC controller and PR controller-based control techniques are increases the efficiency and reduce the THD range within 5% of the proposed model.