ResearchBib Share Your Research, Maximize Your Social Impacts
Sign for Notice Everyday Sign up >> Login

Single-Phase Seven-Level Grid-Connected Inverter for Photovoltaic System with Power Quality

Journal: International Journal of Information Technology and Mechanical Engineering (IJITME) (Vol.1, No. 6)

Publication Date:

Authors : ; ; ;

Page : 1-9

Keywords : Grid connected; modulation index; multilevel inverter; photovoltaic (PV) system; pulse width-modulated (PWM); total harmonic distortion (THD);

Source : Downloadexternal Find it from : Google Scholarexternal

Abstract

This paper proposes a single-phase seven-level inverter for grid-connected photovoltaic systems, with a novel pulse width-modulated (PWM) control scheme. Three reference signals that are identical to each other with an offset that is equivalent to the amplitude of the triangular carrier signal were used to generate the PWM signals. The inverter is capable of producing seven levels of output-voltage levels (Vdc , 2Vdc /3, Vdc /3, 0, −Vdc , −2Vdc /3, −Vdc /3) from the dc supply voltage. A digital proportional?integral current-control algorithm was implemented in a TMS320F2812 DSP to keep the current injected into the grid sinusoidal. The proposed system was verified through simulation and implemented in a prototype.

Last modified: 2014-10-14 00:45:24