Title :
DVR with open-end winding transformer
Author :
Santos, E. C dos, Jr. ; de A Carlos, G.A. ; Jacobina, C.B.
Author_Institution :
Fed. Univ. of Campina Grande, Campina Grande, Brazil
Abstract :
This paper presents a dynamic voltage restorer (DVR) obtained through a series connection of two three-phase inverters. Such connection is obtained due to open-end winding arrangement of the transformer. As done in a conventional configuration, the proposed one aims to regulate the voltage at the load terminal in the case of sags/swell, distortion, or unbalance in the grid voltage. A suitable control strategy is presented, as well as the operating principles, characteristics and a comparison between the proposed and conventional configurations. The main advantages of the proposed topology are: a) reduced harmonic distortion (operating at the same switching frequency), b) reduced converter losses (operating with the same harmonic distortion), and c) fault tolerance capability. The proposed DVR system is suitable for medium voltage application. Simulated and experimental results are also presented.
Keywords :
fault tolerance; harmonic distortion; invertors; load (electric); power convertors; power supply quality; transformer windings; voltage control; DVR system; control strategy; dynamic voltage restorer; fault tolerance capability; grid voltage; load terminal; medium voltage application; open-end transformer winding; reduced converter loss topology; reduced harmonic distortion topology; three-phase inverter; voltage distortion; voltage regulation; voltage sags; Harmonic distortion; Inverters; Phase transformers; Switching frequency; Topology; Voltage fluctuations; Windings;
Conference_Titel :
IECON 2011 - 37th Annual Conference on IEEE Industrial Electronics Society
Conference_Location :
Melbourne, VIC
Print_ISBN :
978-1-61284-969-0
DOI :
10.1109/IECON.2011.6119501