Dissertation/Thesis Abstract

Indirect Matrix Converter as Standard Power Electronic Interface
by Escobar-Mejia, Andres, Ph.D., University of Arkansas, 2014, 148; 3667722
Abstract (Summary)

The increase in the penetration levels of distributed generation in the modern power grid and its importance in future energy systems have accelerated the interest of developing new power electronic interfaces for the energy conversion process. The feasibility of applying the indirect matrix converter as the standard power electronic interface for applications with power ratings from several kW to few MW is addressed in this dissertation. Special attention is given to those applications where space dominates the power electronic requirements. The main motivation for using the indirect matrix converter is that eliminates the energy storage component in the way of a dc-link capacitor for the energy conversion process. This contributes to reduce size and weight, and potentially, increase reliability of the power electronic interface. Two main new contributions are presented. First, a new power electronic interface that allows the connection of two ac power grids through a medium- or high-voltage dc system is proposed. The new topology contemplates the use of two high-voltage dc-link converters based on the modular multilevel converter, two indirect matrix converters and two medium-frequency transformers. Second, a new sensorless control technique working in the dq reference is developed. The controller is used to interface a distributed generation unit to the power grid when the indirect matrix converter is used as the power electronic interface. The design and performance of the proposed power electronic interface is validated through time-domain simulations and a laboratory prototype is built to experimentally validate the sensorless controller.

Indexing (document details)
Advisor: Balda, Juan C.
Commitee: Ang, Simon, McCann, Roy, Wejinya, Uche
School: University of Arkansas
Department: Electrical Engineering
School Location: United States -- Arkansas
Source: DAI-B 76/04(E), Dissertation Abstracts International
Subjects: Electrical engineering
Keywords: Ac-ac converters, Indirect matrix converters, Power electronics, Sensorless controllers
Publication Number: 3667722
ISBN: 9781321419931