A PWM quadrature booster phase-shifter for FACTS

Author

Lopes, Luiz A C ; Joos, Geza ; Ooi, Boon-Teck

Author_Institution

Dept. of Electr. Eng., McGill Univ., Montreal, Que., Canada

Volume

11

Issue

4

fYear

1996

fDate

10/1/1996 12:00:00 AM

Firstpage

1999

Lastpage

2004

Abstract

This paper presents a static phase-shifter based on a parallel connection of modules of a nonconventional PWM AC-AC converter. Conduction losses are kept low by using only one active power conversion stage where the average number of switches through which the current flows is small. Filtering losses are also expected to be low because of the high order and small magnitude of the harmonics generated by switching. This is obtained by operating the modules with symmetrically phase shifted carriers to provide harmonic cancellation. Thus, even with the switches operating at low frequencies to keep the switching losses low, a high equivalent switching frequency is achieved. The performance of the phase-shifter for damping power oscillations in open loop is also evaluated

Keywords

AC-AC power convertors; PWM power convertors; damping; flexible AC transmission systems; losses; oscillations; phase shifters; power conversion; power system control; switching circuits; PWM quadrature booster phase-shifter; active power conversion stage; conduction losses; current flow; filtering losses; harmonic cancellation; high equivalent switching frequency; nonconventional PWM AC-AC converter; open loop; phase-shifter performance; power oscillations damping; switching harmonics; symmetrically phase shifted carriers; Active filters; Damping; Filtering; Power conversion; Power harmonic filters; Pulse width modulation; Pulse width modulation converters; Switches; Switching frequency; Switching loss;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.544287

Filename

544287