ERMUSR MISC. ISSUES 01-13-2004 - Laserfiche WebLink

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Perry 1 nuclear unit, located on the southern shore of Ontario, plus the Quebec system. To the south of of Lake Erie near the border with Pennsylvania, and that line was the rest of the Eastern Interconnection, Avon Lake 9,located near Cleveland,tripped off line which was not affected by the blackout. at virtually the same time. When the Beaver-Davis Besse 345 kV line which 4:10:46 - 4:10:55 PM — New York splits east- connects the Cleveland and Toledo areas, discon- to-west. New England (except southwestern Connecticut) nett York ed, it left the Cleveland area isolated from the annd d remain main in the Maritimes separate from New and n Eastern Interconnection. Cleveland area load was tact. disconnected first by automatic underfrequency load During the next nine seconds, several separations shedding, and finally by the disconnection of the occurred between the areas in the northern section transmission lines. of the Eastern Interconnection. 4:10:42 - 4:10:45 PM — Transmission paths discon- •4:10:46-4:10:55—New York-New England trans- nett in northern Ontario and New Jersey, isolating mission lines disconnect the northeast portion of the Eastern Interconnection The ties between New York and New England •4:10:42 —Campbell unit 3 (rated 820 MW) trips disconnected during this period, and most of the •4:10:43 —Keith-Waterman 230 kV New England area became an island with genera- •4:10:45 —Wawa-Marathon 230 kV tion and demand balanced close enough that it •4:10:45 —Branchburg-Ramapo 500 kV could remain operational. However, southwestern At 4:10:43, eastern Michigan was still connected to Connecticut was separated from New England and remained tied to the New York system for about Ontario, but the Keith-Waterman 230 kV line that one minute. forms part of that interface disconnected. At 4:10:45, the Ontario system separated when the •4:10:48—New York transmission splits east-west. Wawa-Marathon 230 kV line disconnected along The asansmtssine system in New New Jersey and the northern shore of Lake Superior. The portion of soan uthwestern western line, with northern New the ann P P southwestern Connecticut connected to the eastern Ontario to the west of Wawa remained connected to part of the New York system, and Ontario and Manitoba and Minnesota. eastern Michigan connected to the western part. At the same time, the Branchbur -Rama o 500 kV During the next second, Ontario and New York g P would separate, with 15% of the demand across line was now the remaining link between the Eastern New York state disconnected automatically. About Interconnection and the area ultimately affected by 2500 MW of Ontario demand automatically the blackout, and that line disconnected at 4:10:45 disconnected as Ontario attempted to rebalance along with the underlying 230 and 138 kV ties in its system. New Jersey.This left the northern part of New Jersey connected to New York. Pennsylvania and the 4:10:50 - 4:11:57 PM — Ontario separates from j remainder of New Jersey remained connected to the New York west of Niagara Falls and west of St. Eastern Interconnection. Lawrence. Southwestern Connecticut separates from New York and blacks out. At this point, the Eastern Interconnection was split P •4:10:50—The Ontario system just west of Niagara into two sections separated by an east-to-west line. Falls and west of St. Lawrence separates from To the north of that line was New York urn north- New York. em New Jersey, New York, New England, the •4:11:22 —Long Mountain - Plum Tree 345 kV Maritime provinces, eastern Michigan, the majority •4:11:57 — Remaining transmission lines between 1.114:',,..‘'s.f.LL:'412.1:-;a RENZ-VENT _ _ ,. __ .i`i'.:�; _~ �' ".+.?�- Zk 10_ www.k re nzv ro