Title of article
A Grid Connected Transformerless Inverter and its Model Predictive Control Strategy with Leakage Current Elimination Capability
Author/Authors
Fallah Ardashir, J the Electrical Engineering Department, University of Tabriz, Tabriz, Iran , Sabahi, M the Electrical Engineering Department, University of Tabriz, Tabriz, Iran , H. Hosseini, S the Electrical Engineering Department, University of Tabriz, Tabriz, Iran , Babaei, E the Electrical Engineering Department, University of Tabriz, Tabriz, Iran , B. Gharehpetian, G the Electrical Engineering Department - Amirkabir University of Technology, Tehran, Iran
Pages
9
From page
161
To page
169
Abstract
This paper proposes a new single phase transformerless Photovoltaic (PV) inverter for grid connected systems. It consists of six power switches, two diodes, one capacitor and filter at the output stage. The neutral of the grid is directly connected to the negative terminal of the source. This results in constant common mode voltage and zero leakage current. Model Predictive Controller (MPC) technique is used to modulate the converter to reduce the output current ripple and filter requirements. The main advantages of this inverter are compact size, low cost, flexible grounding configuration. Due to brevity, the operating principle and analysis of the proposed circuit are presented in brief. Simulation and experimental results of 200W prototype are shown at the end to validate the proposed topology and concept. The results obtained clearly verifies the performance of the proposed inverter and its practical application for grid connected PV systems.
Keywords
Transformerless Two Stage Inverter , Switched Inductor , High Voltage Gain , Model Predictive Control , MPC
Journal title
Iranian Journal of Electrical and Electronic Engineering(IJEEE)
Serial Year
2017
Record number
2504628
Link To Document