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Transformerless Grid Connected Inverter with Active and Reactive Power Control in Distributed Generation System

S. Vivek, L. Keerthana, M. Tamilselvi, P. Vigneshwari


This project deals with analyzing of a transformer less grid-connected inverter with active and reactive power control by controlling the inverter output phase angle and amplitude in relation to the grid voltage .The simulation of the grid interactive inverter is carried out in MATLAB/SIMULINK environment .The proposed methodology for control of transformer less grid interactive inverter which supplies active and reactive power to the loads and also makes the grid current to a sinusoidal one to improve the power factor and reduce the harmonics in grid current. The main norms that grid connected inverters have to comply with 1) Total Harmonic Distortion (THD) levels, 2) Power Factor (PF), 3) level of injected dc current 4) voltage and frequency range for normal operation .Thus, the aim of this work is to select a control and switching strategy for an inverter which is to be used as part of a grid connected PV system capable of improving the power quality in terms of power factor and low THD.

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