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The Italian 2003 blackout
No full textOn September 28th, 2003, at 3:01 a.m., a fault on the
Swiss power system caused the overloading of two Swiss internal
lines close to the Italian border. The interconnection lines were
heavily loaded by the large power import and the coordination
between the system operators was not sufficient to mitigate the
overload. The consequent loss of those important branches
caused cascading outages of the lines interconnecting the Italian
system and the remaining part of the UCTE (Union for the Coordination
of the Transmission of Electricity) system. This
resulted in a very sudden loss of synchronism between the Italian
system and the UCTE grids, causing the loss of the whole import.
The consequent power unbalance caused the frequency in Italy to
decline; the automatic load shedding procedure was not able to
shed load enough to balance the generation and the load, and this
resulted in the blackout.
The paper provides a short description of the pre-fault system
operation and of the main events that triggered the blackout,
identifying some of the main causes that resulted in the
separation of the Italian system and the blackout. In addition,
issues related to the misoperation of the Italian automatic
procedure to prevent the blackout are discussed
A coordinated procedure to control Hopf bifurcations via a secondary voltage regulation scheme
No full text
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