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Modeling, simulation and control of three-phase three level multilevel inverter for grid connected photovoltaic system

SERKAN SEZEN1,* , ENGIN ÖZDEMİR2

Affiliation

  1. Balıkesir University, Altınoluk Vocational School, Atatürk Street No:103 Altınoluk/Balıkesir
  2. Kocaeli University, Faculty of Technology, Department of Energy Systems Engineering, 41380 Umuttepe Kocaeli

Abstract

This paper presents a control for a three phase three-level neutral point clamped inverter (NPC) for grid connected photovoltaic (PV) system. The maximum power point tracking (MPPT) is capable of extracting maximum power from the photovoltaic (PV) array connected to each DC link voltage level. The MPPT algorithm is solved by Perturb&Observe method. The MPPT system is integrated with the DC-link controller so that a DC–DC converter is not needed and the output shows accurate and fast response. Synchronous Reference Frame (dq) Control Strategy is used for grid-connected PV system so that PI controllers are used to control easily DC-link voltage, active and reactive currents. The validity of the system is verified through the simulations with MATLAB/Simulink..

Keywords

Three phase three-level neutral point clamped (NPC) inverter, Multilevel inverter, Grid connected, Photovoltaic, Maximum power point tracking (MPPT), Synchronous Reference Frame (dq) Control.

Submitted at: Dec. 18, 2012
Accepted at: April 11, 2013

Citation

SERKAN SEZEN, ENGIN ÖZDEMİR, Modeling, simulation and control of three-phase three level multilevel inverter for grid connected photovoltaic system, Journal of Optoelectronics and Advanced Materials Vol. 15, Iss. 3-4, pp. 335-341 (2013)