Enes Durbaba

Abstract

The purpose of this project is to design a structure for obtaining high efficiency during the transfer of electrical power directly to the network in accordance with the power quality standards in electrical power production through the PV systems. Accordingly, power electronics circuits consisting of converter and inverter structures in PV systems are designed as a whole. There is no leakage ground current circulation and electromagnetic interference (EMI) since the common mode voltage in the single-phase inverter will be DA which was proposed and designed for the first time in an original structure by our research group. In addition, with the proposed transformerless inverter structure, it is aimed to increase the efficiency in the photovoltaic systems and to decrease the cost and power loss.

In the DA / DA converter design to be used for maximum power tracking, a high electron mobility transistor (HEMT) and Silicon Carbide (SiC) semiconductor power module is used, which is suitable for working in high bandwidth, high power applications and high frequency. Thus, high efficiency, low volume, maximum power point tracker (MPPT) and PV modules are connected to the grid compared to IGBT based drives. DA-DA boost converter, which is designed by using GaN transistor and SiC diode, is connected to the proposed inverter input. Matlab and PSPICE simulation results based on mathematical modeling of this converter were compared with the application results of DA-DA converter prototype installed in the laboratory.

In addition, the performances of the maximum power tracking algorithms during the application were observed with this converter prototype installed and the PV simulator purchased. This research consists of three parts: modeling, simulation and experimental study. The proposed inverter structure was first modeled by using IGBT and then modeled by using GaN semiconductors, and simulated and implemented. Both systems were compared both in terms of common mode voltage performance and efficiency.

Two papers were prepared within the scope of this project. In addition, for the proposed inverter structure, a patent was submitted with the title of “Single Phase Inverter for Photovoltaic Panels” and Application Number 2018/14210 and received a positive research report.

Project team
Executive: Prof.Dr. Eyup Akpinar
Researcher : Dr. Abül Balikci, Dr. Buket Turan Azizoglu
Scholar: Enes Durbaba