ESTUDOS E IMPLEMENTAÇÕES DE TOPOLOGIAS DE ...

Abstract of Dissertation presented to COPPE/UFRJ as a partial fulfillment of the
requirements for the degree of Master of Science (M.Sc.)
STUDIES AND IMPLEMENTATION OF DYNAMIC VOLTAGE REGULATORS
Isidoro Campos Raposo de Almeida Filho
July / 2007
Advisor: Mauricio Aredes
Department: Electrical Engineering
This work presents two topologies of series compensators with auxiliary
source of active power. A basic topology of a Dynamic Voltage Regulator (DVR) is
presented, with each one of its components and functionality, as well as the special
characteristics of this series compensator. The modeling and studies of a second
topology, called the Inverted Dynamic Voltage Regulator (DVRI), different from the
traditional one by replacing the diode bridge on the load side of the series transformer.
A simplified control method was developed and presented excellent results.
Beyond these topologies, a third one, in which there is no diode bridge as
an auxiliary active power source. It was called Sag-Swell Dynamic Voltage Regulator
(DVRSS).
Firstly, the proposed topologies are analysed in the digital simulation
program PSCAD/EMTDC V.4.0.1. Then, the experimental prototypes of the DVR and
the DVRI are evaluated under real operational conditions. Their performances, as well
as some advantages and disadvantages of each topology are discussed.
This work has shown the robustness and flexibility of operation of the
proposed topologies. Finally, it is concluded that the Topologies of the DVRI and the
DVRSS are feasible and adequate for mitigating voltage disturbances and can
compensate voltage imbalances, as well as harmonics.
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