Global Blackouts – Lessons Learned - Siemens

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10 | 4:09 PM - “Point of no Return” (Source: ITC 08-2003 – “Blackout”) Fig. 11: Events 10-12 – Begin of Voltage Decline Fig. 12: Event 18 – 30 s to Blackout The reasons why Québec “survived” the cascade are very clear: Giant Loop Flow 2.8 GW � Québec´s major Interconnections to the affected Areas are DC- Links � These DC-Links are like a Firewall against Cascading Events � They split the System at the right Point on the right Time, whenever required � Therefore, Québec was “saved” � Furthermore, the DCs assisted the US-System Restoration by means of “Power Injection”
a) Blackout: a large Area is out of Supply Fig. 13: The Blackout Area a) and a Satellite View b), before and after the Outage Fig. 14 and Fig. 15 depict a view of the systems dynamics during the cascade. It can be seen that the number of disconnections and fluctuations in power and frequency where in fact huge. In total, an amount of about 62 GW customer loads were lost, and about 50 million people in seven states were out of supply. However, 50 GW loads were reconnected within 16 hours. Source: Cigré Paris Session 2004 Fig. 14: Recordings from HydroOne – from 16:05 to 16:12 However, some Islands still have local Supply b) Before the Blackout Source: EPRI 2003 Events and GWs Québec´s HVDCs assist in Power Supply and System Restoration | 11
Page 1 and 2: www.siemens.com/energy Global Black
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Page 5 and 6: area power exchange. Bottlenecks ar
Page 7 and 8: Fig. 5 shows that the probability o
Page 9: Around 3 to 4 hours after the first
Page 13 and 14: Source: US-Canada Blackout Final Re
Page 15 and 16: other power plant outage. A large p
Page 17 and 18: Fig. 22: The Sequence of Events in
Page 19 and 20: UPS (Uninterruptible Power Supplies
Page 21 and 22: e strong from the beginning on for
Page 23 and 24: y a power-flow controller, e.g. HVD
Page 25 and 26: In Great Britain, in the course of
Page 27 and 28: In a similar way, as shown in Fig.

Global Blackouts – Lessons Learned - Siemens

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