IEEE Power & Energy Magazine - November/December 2016 - 65

2200 MW

9450 MW

5100 MW

5000 MW
System
Collapse
13 March 1989

figure 6. The location of principal events leading to the blackout.

the manic-5-saguenay subsystem, the minimum number
of generating units that must be synchronized at the micoua substation before synchronizing the first 735-kV line
could not be achieved. Furthermore, an operating incident
caused the loss of the LG-3-saguenay subsystem (James
bay east corridor). consequently, nine hours after the system collapsed, approximately 17% of the load was still not
supplied. The last customers at the distribution level were
restored that evening.

Aftermath
The system blackout caused both equipment damage and
unavailability, hindering system restoration as well as system operation once power was restored. at the La Grande-4
substation, a single-phase unit in each of two transformnovember/december 2016

ers suffered major damage (phase c of transformer T1 and
phase a of transformer T3), while at the chibougamau substation, the transformer of sVc cLc 12 suffered a phase c
fault. The phase b single-phase unit of shunt reactor XL2
at némiscau substation was damaged and required factory
repair. The sVcs at the albanel and némiscau substations
suffered minor damage and were repaired within hours. at
the némiscau substation, thyristors were burned out, and at
albanel substation capacitor bank components were damaged. surge arrestors at the La Grande-2, La Grande-4,
némiscau, bersimis, montagnais, and churchill Falls installations were damaged, and all were replaced.
many observations regarding the system restoration process were also made. The restoration of the single main restoration island or bmps and the maisonneuve subsystem
ieee power & energy magazine

65



Table of Contents for the Digital Edition of IEEE Power & Energy Magazine - November/December 2016

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