A new scheme for multilevel inverter based dynamic voltage restorer

Author

Babaei, Ebrahim ; Kangarlu, Mohammad Farhadi

Author_Institution

Fac. of Electr. & Comput. Eng., Univ. of Tabriz, Tabriz, Iran

fYear

2011

fDate

20-23 Aug. 2011

Firstpage

1

Lastpage

6

Abstract

In this paper, a new scheme for the multilevel inverter based dynamic voltage restorer (DVR) is proposed. The proposed DVR uses multilevel inverter and a dc/dc converter. The dc/dc converter adjusts the dc link voltage according to the amount of voltage sag so that the output voltage of the multilevel inverter has always its maximum possible number of levels. This results in the better quality of output voltage in both deep and shallow voltage sags. It is important to emphasize that the existing multilevel inverter based DVR topologies have not this capability. The mathematical analysis of operation range of the proposed DVR is given by details. The simulation results using PSCAD/EMTDC as well as the experimental results from a laboratory prototype verify the proposed DVR scheme.

Keywords

DC-DC power convertors; invertors; mathematical analysis; power supply quality; DC link voltage; DC-DC converter; DVR; PSCAD-EMTDC simulation; dynamic voltage restorer; mathematical analysis; multilevel inverter; output voltage quality; voltage sag; DC-DC power converters; Energy storage; Inverters; Power quality; Switches; Topology; Voltage fluctuations; DVR; Voltage sag; dc/dc converter; multilevel inverter;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Machines and Systems (ICEMS), 2011 International Conference on

Conference_Location

Beijing

Print_ISBN

978-1-4577-1044-5

Type

conf

DOI

10.1109/ICEMS.2011.6073375

Filename

6073375