Presentation on theme: "Sierra Subregional Planning Group 10-year Transmission Plan"— Presentation transcript:
1 Sierra Subregional Planning Group 10-year Transmission Plan 2011- 2020 New ProjectsProjects In-processDeferred ProjectsWest Connect Annual Stakeholders Meeting, February 17, 2011, Las Vegas, NV
2 NV Energy 10-year Transmission Plan 2011 - 2020 New ProjectsProjects In-processDeferred ProjectsWest Connect Annual Stakeholders Meeting, February 17, 2011, Las Vegas, NV
3 New Transmission Projects Joint ON Line [Financial close ]230 kV Shunt Reactors [Completed]Harry Allen 345/230 kV Transformer Bank 2Harry Allen – Northwest 500 kV Line PermittingNorthwest - Amargosa 500 & 230 kV PermittingHarry Allen – El Dorado 500 kV Line Permitting
6 ON Line Construct ON Line flow ~ 600 MW SPPC to NPC 235-mile 500 kV transmission line Robinson-Harry AllenRobinson Summit 500/345 kV substationFalcon-Gonder FoldAdd 70% series compensation: 35% at Falcon and 35% at RobinsonHarry Allen TerminalON Line flow~ 600 MW SPPC to NPC~ 600 MW NPC to SPPCTotal Project estimate $509.6M$14.7M in 2010$217.6M in 2011$262.5M in 2012
7 230 kV Shunt Reactors Three 100 MVAR shunt reactors Decatur Equestrian MagnoliaRequired due to high voltage on the transmission lines during light loads Off-peak voltages are at 242 kV limit for 230 kV- class equipment, reactors are needed to prevent damage$9.2M in 2010
8 Harry Allen 345/230 kV Transformer Bank 2 PacifiCorp has submitted a request to Nevada Power for the addition of a second 345/230 kV transformer at Nevada Power’s Harry Allen Substation. The project is under construction, ISD: 6/15/2011. With its installation, TOT 2C (WECC Path 35) rating will increase to 400 MW N-S and 580 MW S-N.Used to serve load in Red Butte, Utah. The Red Butte load is primarily served by the Utah Associated Municipal Power Systems (“UAMPS”), which is in the PacifiCorp Balancing Authority Area.PACE to pay project costs
9 Harry Allen – Northwest 500 kV This Project is the permitting & acquisition of a 500 kV line ROW Harry Allen to Northwest SubstationThis route is needed to eliminate the 2x1500 MW transformer (2014+) loss under a Lenzie – NW 500 kV outage. This parallel line would mitigate this N-1 substantially and thereby delay expensive upgrades.This project is the permitting & acquisition of 230/500 kV line ROW from Northwest Substation into the Amargosa Valley This line would also enable the delivery of high levels of solar from the Amargosa Valley via the NW sub, reinforce NW substation for a west side 500 kV line, and remove the need to build through Pahrump to second source NW sub (a 160 mile 500 kV detour)This Project is the permitting and acquisition of a 500 kV line right-of-way from Harry Allen Substation to El Dorado SubstationNV Energy was directed to re-submit request after further development.Northwest - Amargosa 500 & 230 kVHarry Allen – El Dorado 500 kV
10 Northwest 500/230 kV Bank 2 Delay Studies in 2006 indicated a 2010 need for a second Northwest 500/230 kV transformer to meet projected load growth in the Las Vegas Valley.Postponed until 2014+, using RAS with Gen trip and 500 -> 230kV flow redirection through Crystal PSTs.Projected “flat” load growth in the Las Vegas Valley allows this postponement.
11 Carson Lake 230 kVNew 230 kV, 30 mile line to interconnect ~150 MW of new geothermal resources and provide a second source to Fallon, Nevada.Approved in 2007 with a 2013 COD.Estimated budget is 35.0 M
12 Bordertown 345/120 kV transformer New 345/120 kV, 280 MVA transformer and ~15 miles of 120 kV line to provide additional capacity to west Reno and Lake Tahoe.Approved in 2007 with a 2012 COD.Has been delayed to 2014 by permittingEstimated budget is 20.4M
13 Mohave 500 kV Modifications The owners of the Mohave Generating Station are decommissioning the facility and removing the existing Mohave 13.8 kV reserve bus. The bulk of the existing Mohave 500kV facilities will remain.The existing 69/13.8/500 kV interconnection has acted as a second source for the Nevada Power transmission system with a peak backup capacity of 50 MVA.When the reserve bus is removed, Nevada Power will need a second service point to maintain reliability.New 2 span 500 kV line required.
14 Harry Allen Combined Cycle 500 kV Transmission work required to interconnect the 489 MW HA CC to the Harry Allen 500 kV Substation.Including the transmission line about 0.5 milesThe new 500 kV line terminal at Harry AllenThe relocation of the APEX line terminal at Harry Allen.June 1, 2011 expected HACC COD
15 Valley Electric Association Interconnection VEA has submitted an interconnection request to Nevada Power for the interconnection of the VEA’s Sterling 230 kV substation to Nevada Power’s Northwest 230 kV substation.The interconnection will allow VEA to meet NERC voltage reliability requirements during N-1 contingencies.The transmission line is proposed to be forty-two (42) miles long, energized at 230 kV and utilize 954-ACSR.The VEA interconnection project was approved by the Commission in the 2006 IRP.
16 EEI STEP Transformer Sharing Program The Commission approved $4.5M in funding for the EEI Step Transformer Sharing Program in Amendment Four of the 2006 IRP. $1.5M was spent prior to 2010.Nevada Power is requesting the Commission to authorize Nevada Power to spend $4.0 M in Action Plan Period
17 WestconnectNevada Power has been authorized by the Public Utilities Commission to fund its participation in WestConnect during the IRP Action Plan Period.Nevada Power participates in the WestConnect Steering Committee and Transmission Planning Committee.Sierra Pacific Power has been authorized by the Public Utilities Commission to fund its participation in WestConnect during the IRP Action Plan Period.Sierra Pacific Power participates in the WestConnect Steering Committee and Transmission Planning Committee.
18 Sunrise 500 kV Tap Thunderbird 230 KV Sub Blackhawk 345 kV KV Sub The Commission has approved about $12.8M dollars for Sunrise Tap lands only: for the 500/230 kV substation and 230 kV ROWs.Sunrise has been deferred until 2018Thunderbird 230 KV SubThe Commission approved about $54.1M in the 2006 IRP for Thunderbird (lands and construction) only about $1M has been spent to date.Thunderbird has been deferred until about 2017 and will likely be deferred longer if the load forecast remains flat.Blackhawk 345 kV KV SubThe Commission approved $29.8M in the 2004 IRP for Blackhawk Substation.Blackhawk has been indefinitely deferred and will likely be driven by renewable development if it goes forward.
19 Renewable Energy Conceptual Transmission Plan (“RECTP”) Required by Assembly Bill 387Regulated under PUCN DocketIdentifies transmission plans and costs to access RETAAC/PUCN approved renewable energy zonesFiled in each NV Energy triennial Integrated Resource PlanFirst RECTP filing was July 1, 2010
20 New Projects PROPOSED PROJECTS Sierra Subregional Planning Group year Transmission PlanNew ProjectsPROPOSED PROJECTSWest Connect Annual Stakeholders Meeting, February 17, 2011, Las Vegas, NV
21 New Transmission Projects O'Banion – Elverta/Natomas 230 kV Double Circuit LineJoint Project with WAPAScheduled for Completion May 2011230 kV Shunt Capacitor at Natomas (50 MVAR)Scheduled for Completion June 2011
22 Proposed Transmission Projects Convert Sutter – O’Banion 230 kV Line from Single to Double Circuit200 MVAR 230 kV Shunt CapsPower Factor Improvement ProgramIowa Hill Pumped Storage Plant (400 MW)
23 New Projects PROPOSED PROJECTS Sierra Subregional Planning Group year Transmission PlanNew ProjectsPROPOSED PROJECTSWestConnect Annual Stakeholders Meeting, February 17, 2011, Las Vegas, NV
24 New Transmission Projects O'Banion – Elverta/Natomas 230 kV Double Circuit LineJoint Project with SMUDScheduled for Completion May 2011Upgrade Tracy Sub to DBDB ConfigurationScheduled for Completion last quarter 2012Reconductor Shasta - Flanagan – Keswick 230 kV LineScheduled for Completion June 2014
25 Proposed Transmission Projects Convert Sutter – O’Banion 230 kV Line from Single to Double CircuitFiber Optic addition to Hedge – Tracy 230 kV lineReconductor the Elverta – Tracy 230 kV lines