L#10 Power _System_Stability_2

L#10 Power _System_Stability_2 - pk1443 - 1 Power System...

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Unformatted text preview: pk1443 - 1 Power System Security in the New Industry Environment: Challenges and Solutions Prabha Kundur Powertech Labs Inc. Surrey, B.C. Canada Prabha Kundur Powertech Labs Inc. Surrey, B.C. Canada IEEE Toronto Centennial Forum on Reliable Power Grids in Canada October 3, 2003 pk1443 - 2 Power System Security Security of a power system is affected by three factors: Characteristics of the physical system : the integrated generation, transmission and distribution system protection and control systems Business structures of owning and operating entities The regulatory framework pk1443 - 3 Challenges to Secure Operation of Today's Power Systems Power Systems are large complex systems covering vast areas national/continental grids highly nonlinear, high order system Many processes whose operations need to be coordinated millions of devices requiring harmonious interplay pk1443 - 4 Challenges to Secure Operation of Today's Power Systems (cont'd) Complex modes of instability global problems different forms of instability: rotor angle, voltage, frequency "Deregulated" market environment many entities with diverse business interests system expansion and operation driven largely by economic drivers; lack of coordinated planning pk1443 - 5 Traditional Approach to Power System Stability The November ,9 1965 blackout of Northeast US and Canada had a profound effect on consideration of stability in system design and operation focus, however, has been largely limited to transient (angle) stability The changing characteristics of power systems requires careful consideration of other aspects of stability Interarea oscillations; voltage stability System designed/operated to withstand loss of a single element Operating limits based on off-line studies scenarios based on judgment and experience November 9, 1965 Blackout of Northeast US and Ontario pk1443 - 7 November 9, 1965 - Blackout of Northeast US and Ontario Clear day with mild weather Load levels in the regional normal Problem began at 5:16 p.m. Within a few minutes, there was a complete shut down of electric service to virtually all of the states of New York, Connecticut, Rhode Island, Massachusetts, Vermont parts of New Hampshire, New Jersey and Pennsylvania most of Ontario Nearly 30 million people were without power for about 13 hours pk1443 - 8 Events that Caused the 1965 Blackout The initial event was the operation of a backup relay at Beck GS in Ontario near Niagara Falls opened circuit Q29BD, one of five 230 kV circuits connecting Beck GS to load centers in Toronto and Hamilton Prior to opening of Q29BD, the five circuits were carrying 1200 MW of Beck generation, and 500 MW import from Western NY State on Niagara ties Net import from NY 300 MW Loading on Q29BD was 361 MW at 248 kV; The relay setting corresponded to 375 MW pk1443 - 9 Events that Caused the 1965 Blackout (contd) Opening of Q29BD resulted in sequential tripping of the remaining four...
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This note was uploaded on 10/01/2011 for the course ECET 331 taught by Professor Tim during the Summer '11 term at Purdue University-West Lafayette.

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L#10 Power _System_Stability_2 - pk1443 - 1 Power System...

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