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Abstract --The motivation for this work is the need
of a study systematic of the power static converterswith power
systems on weak grids, has a tremendousimportance to increase
availability, reliability,productivity, efficiency, reduce
maintenance,operating costs in Industrial
applications(SAG,Convoyers,) and requiring an intimate
understanding of utility grid operation, powerelectronics,
machines, control, faults and protectionsystems.This work presents
a novel model fordiagnosis fault , approach for a 72 pulse
cycloconverter drive system, extended to neutral pointclamped
back to Back. The proposed strategy ismainly focused in stability
of voltage, power,frequency of grid and how their
oscillationsoriginated fault in the semiconductors of theconverters
or power system.To probe the faultdiagnosis strategy and its
behaviour, the algorithmwas implemented on DSPACE DS1103 for a
5KVAlaboratory prototype of a cycloconverter system,simulations of
the power systems in Digsilent andStudy a fault case of phase open
effects of a feeder23KV affecting medium power AC drive
systems.
Index Terms Grid Weak, AC Motor Drives,Cycloconverter, Neutral
Point Clamped, Power
System Stability, Fault Diagnosis.
J orge Pontt (M00SM04) received the Engi-neeringand Masters
degrees in electrical engineering from the
Universidad Tcnica Federico Santa Mara(UTFSM),Valparaso, Chile,
in 1977.Since 1977, he has been withUTFSM, where he is currently a
Professor in the
Electronics Engi-neering Department and Director ofthe
Laboratory for Reliability and Power Quality. He is
a coauthor of the software Harmonix used in harmonicstudies in
electrical systems. He is a coauthor of patentapplications
concerning innovative instrumentation
systems employed in high-power converters and largegrinding mill
drives.He has authored more than 90
international refereed journal and conference papers. Heis a
Consultant to the mining industry, in particular, inthe design and
application of power electronics, drives,
instrumentation systems, and power quality issues,
withmanagement of more than 80 consulting and R&D
projects. He has had scientific sabbaticals at theTechnische
Hochschule Darmstadt (19791980),
University of Wuppertal (1990), and University ofKarlsruhe
(20002001), all in Germany. He is currentlyDirector of the Centre
for Autogenous Grinding and
Electrical Drives at UTFSM.
Miguel A. Panduro was born in San Martin, Peru, in
1976. He received the Engineer degree in electronicengineering,
from the University of Antenor Orrego of
Trujillo in 1998. In 1999 -2001 work at Cement ofLima(
Industrial Instrumentation Supervisor) - Peru;Since 1992, he has
been with University National of
Piura Peru, where he is currently a Professor in theElectronics
Engineering and in the National Service forIndustrial Training of
Peru(SENATI).He is currently
working towards Msc.degree in Electronic Engineering,in
Technical University Federico Santa Mara,
researching in the area of power converters.
Analysis of AC Drive Systems on Weak GridsJ.Pontt, Senior Member
IEEE, M.Panduro, Fellow, IEEE
[email protected] , [email protected]
mailto:[email protected]:[email protected]:[email protected]:[email protected]:[email protected]
