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Western Area Power Administration Sierra Nevada Region

2010 Annual Ten-Year Transmission Plan Assessment

Report

Report Attachment 4 NERC Planning Standard TPL-002

November 1, 2010

For information or questions regarding this Transmission Assessment Report, please contact Larry Tobias via (916) 353-4766 or email at Tobias@wapa.com

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Attachment 4: Category B (NERC Planning Standard TPL-002): Single Element Outage, (N-1) Includes Power Flow, Post-Transient and Dynamic Stability Plots)

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Figure 4-1 2011 Summer Peak Load Normal System

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Figure 4-2 2011 Summer Peak Load – Pre-SVS Project

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Figure 4-3 2011 Summer Peak Load – Pre-SVS Project O’Banion-Elverta 230 kV Line Outage – Drop Sutter Power Plant

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Figure 4-4 2011 Summer Peak Load – Post-SVS Project O’Banion-Elverta 230 kV Line Outage

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Figure 4-5 2011 Summer Peak Load

Shasta-Cottonwood 230 kV Line Outage

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Figure 4-6 2011 Summer Peak Load Shasta Split 230 kV Bus

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Figure 4-7 2011 Summer Peak Load Shasta-Flanagan 230 kV Line Outage

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Figure 4-8 2011 Summer Peak Load Shasta-Flanagan 230 kV Line Outage, Shasta-Cottonwood 230 kV Lines Uprated

Wave Trap and line jumpers into Cottonwood Substation Replaced

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Figure 4-9 2011 Summer Peak Load Captain Jack-Olinda 500 kV Line Outage

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Figure 4-10 2011 Summer Peak Load Captain Jack-Olinda 500 kV Line Outage

60% Northern California Hydro Generation

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Figure 4-11 2011 Summer Peak Load

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Figure 4-12 2015 Summer Peak Load

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Figure 4-13 2020 Summer Peak Load

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Figure 4-14 2015 Summer Peak Load

NERC TPL-002 Category B1 Sutter Power Plant Outage

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Figure 4-15 2015 Summer Peak Load NERC TPL-002 Category B2

O’Banion-Elverta 230 kV Line Outage

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Figure 4-16 2015 Summer Peak Load NERC TPL-002 Category B3

Tracy 500/230 kV Transformer bank Outage

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Figure 4-17 2015 Summer Peak Load NERC TPL-002 Category B1 Sutter Power Plant Outage

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Figure 4-18 2015 Summer Peak Load NERC TPL-002 Category B2

O’Banion-Elverta 230 kV Line Outage

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Figure 4-19 2015 Summer Peak Load NERC TPL-002 Category B3

Tracy 500/230 kV Transformer Bank Outage

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Figure 4-20 2020 Summer Peak Load

NERC TPL-002 Category B2 Sutter Power Plant Outage

An Outage of the Sutter Combined-Cycle Power Plant could not be taken for the year 2020 under summer peak load conditions due to apparent insufficient reactive voltage support within the Sacramento Area. This deficiency is associated with load growth in the Sacramento Area as the

scheduled power transfer over WASN’s transmission system has not increased from 2015 to 2020. This will be followed up with the utility companies (load serving entities) in this area (Sacramento Municipal Utility District and the City of Roseville) to more accurately identify the

deficiency and best location to add additional reactive voltage support and if it should be static and/or dynamic type reactive voltage support. This outage is identified with NERC Planning Standard TPL-002 and a category B1 outage.

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Figure 4-21 2020 Summer Peak Load NERC TPL-002 Category B2

O’Banion-Elverta 230 kV Line Outage

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Figure 4-22 2020 Summer Peak Load NERC TPL-002 Category B3

Tracy 500/230 kV Transformer bank Outage

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Figure 4-23 2020 Summer Peak Load NERC TPL-002 Category B1 Sutter Power Plant Outage

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Figure 4-24 2020 Summer Peak Load NERC TPL-002 Category B2

O’Banion-Elverta 230 kV Line Outage

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Figure 4-25 2020 Summer Peak Load NERC TPL-002 Category B3

Tracy 500/230 kV Transformer Bank Outage