Digital Current Control of a Voltage Source Converter With Active ...

WU AND LEHN: DIGITAL CURRENT CONTROL OF A VOLTAGE SOURCE CONVERTER 1373
first time combined the flexibility of pole assignment with inherent
transient overcurrent protection. -plane analysis of a test
system with characteristic parameters showed that the controller
was robustly stable to variations in the grid interface inductance.
Both simulation and experimental results showed that even at
a low switching frequency relative to the resonant frequency,
the proposed control structure can achieve well-damped, highbandwidth
current control, and that cross-coupling can be minimized.
Furthermore, the controller has good disturbance rejection,
and regardless of overall performance provides instantaneous
overcurrent protection even during severe transient disturbances.
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Eric Wu (S’03–M’05) was born in Taipei, Taiwan, R.O.C., in 1978. He received
the B.A.Sc. and M.A.Sc. degrees in electrical engineering from the University
of Toronto, Toronto, ON, Canada, in 2002 and 2005, respectively.
Peter W. Lehn (SM’05) received the B.Sc. and M.Sc. degrees in electrical enginnering
from the University of Manitoba, Winnipeg, MB, Canada, in 1990
and 1992, respectively, and the Ph.D. degree from the University of Toronto,
Toronto, ON, Canada, in 1999.
From 1992 to 1994, he was with the Network Planning Group, Siemens AG,
Erlangen, Germany. Presently, he is an Associate Professor at the University of
Toronto.